Patent Grant
10940195
The present invention relates generally to the field of medicine. More particularly, it concerns new and novel vaccines against Human Papilloma Virus (HPV) and HPV-related diseases, including multiple types of cancers.
Human papillomavirus (HPV) is one of the most common sexually-transmitted pathogens. Current HPV prophylactic vaccine have shown significant clinical efficacy in the prevention of HPV infection, but it exhibits no efficacy in the treatment of infected patients and HPV-related cancers. HPV infection causes virtually all cervical cancers, and many anal, vaginal, vulvar, penile, and oropharyngeal (throat) cancers. Thus, the development of safe and effective vaccines for patients who are infected with HPV and have HPV-related cancers are in high demand. HPV infection also causes HIV-related malignancy and cancers.
Current HPV vaccines are recombinant virus-like particles made of capsid (L) proteins of HPV 6, 11, 16, and 18. These vaccines can elicit strong antibody responses and thus can prevent HPV infection. To suppress viral replication and to eradicate HPV-related cancers, vaccines need to evoke strong T cell responses, particularly cytotoxic CD8+ lymphocytes (CTLs) that can kill virus-infected cells followed by the inhibition of HPV replication as well as HPV-related tumor cells.
Several types of vaccine models (including peptides, proteins, and DNA-based vaccines and vaccines carried by live-attenuated vectors) have been tested, but these vaccines have drawbacks either in efficacy or safety particularly in immunodeficient patients. This gap necessitates developing safe and potent immunotherapeutic vaccines against HPV-associated cancer.
A wealth of evidence has led to the conclusion that virtually all cases of cervical cancer are attributable to persistent infection by a subset of HPV types, especially HPV type 16 (HPV 16) and HPV type 18 (HPV 18). These HPV types also cause a proportion of other cancers of mucosa, including vulvar, vaginal, anal, penile, and oropharyngeal cancers. HPV 16 is the predominant type in squamous cell carcinoma of the cervix, and HPV 18 is the second most common type with prevalence ranging from 12.6% in Central/South America to 25.7% in South Asia. In addition, HPV 18 has been implicated in rapidly developing and potentially more aggressive cervical carcinomas. However, subclinical infections are the most common manifestation of HPV infection. Different studies reported between 15% and 36% of subclinical infections in sexually active adults.
Disclosed is a fusion protein comprising an anti-CD40 antibody or fragment thereof, comprising at least three complementarity determining regions from an anti-CD40 antibody, at least one peptide linker, and at least one human papillomavirus (HPV) E6 or E7 antigen, wherein the E6 or E7 antigen or antigens are HPV type 16 or HPV type 18 antigens. In some embodiments, the anti-CD40 antibody or fragment thereof comprises at least the variable region from an anti-CD40 antibody. The variable region can be from a light chain or heavy chain. In some embodiments, the anti-CD40 antibody or fragment thereof comprises at least the variable region from an anti-CD40 antibody light chain and at least the variable region from an anti-CD40 antibody heavy chain. In some embodiments, the anti-CD40 antibody or fragment thereof comprises six CDRs from an anti-CD40 antibody. In some embodiments, the anti-CD40 antibody or fragment thereof is humanized. In some embodiments, the peptide linker or linkers are a flexible linker. In some embodiments, the peptide linker or linkers comprise one or more glycosylation sites. In some embodiments, the peptide linker or linkers are Flexv1 (SEQ ID NO:5) and/or f1 (SEQ ID NO:6). In some embodiments, the HPV antigens are E6 and E7. In some embodiments, the fusion protein comprises the sequence of SEQ ID NO:19. In some embodiments, the fusion protein comprises the sequence of SEQ ID NO:21. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen and at least one HPV E6 antigen is an HPV type 18 antigen. In some embodiments, at least one HPV E7 antigen is an HPV type 16 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen and at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 16 antigen and at least one HPV E7 antigen is an HPV type 18 antigen.
Also disclosed is a fusion protein comprising the amino acid sequences of at least SEQ ID NOs:11-13 or SEQ ID NOs:14-16 and at least one human papillomavirus (HPV) E6 or E7 antigen. In some embodiments, the fusion protein comprises SEQ ID NOs:11-13 and SEQ ID NOs:14-16. In some embodiments, the E6 or E7 antigen or antigens are HPV type 16 or HPV type 18 antigens. In some embodiments, the fusion protein further comprises a peptide linker. In some embodiments, the peptide linker is a flexible linker. In some embodiments, the peptide linker comprises one or more glycosylation sites. In some embodiments, the peptide linker is Flexv1 (SEQ ID NO:5) and/or f1 (SEQ ID NO:6).
Also disclosed is a pharmaceutical composition comprising any of the above fusion proteins.
Also disclosed is a method of making any of the above fusion proteins comprising isolating the fusion protein from a recombinant host cell expressing the fusion protein.
Also disclosed is a composition comprising a dendritic cell targeting complex comprising an anti-CD40 antibody or fragment thereof comprising at least three complementarity determining regions from an anti-CD40 antibody, at least one peptide linker and at least one human papillomavirus (HPV) E6 or E7 antigen, wherein the E6 or E7 antigen or antigens are an HPV type 16 or HPV type 18 antigen. In some embodiments, the anti-CD40 antibody or fragment thereof comprises at least the variable region from an anti-CD40 antibody. The variable region can be from a light chain or heavy chain. In some embodiments, the anti-CD40 antibody or fragment thereof comprises at least the variable region from an anti-CD40 antibody light chain and at least the variable region from an anti-CD40 antibody heavy chain. In some embodiments, the anti-CD40 antibody or fragment thereof comprises six CDRs from an anti-CD40 antibody. In some embodiments, the anti-CD40 antibody or fragment thereof is humanized. In some embodiments, the peptide linker or linkers are a flexible linker. In some embodiments, the peptide linker or linkers comprise one or more glycosylation sites. In some embodiments, the peptide linker or linkers are selected from Flexv1 (SEQ ID NO:5) or f1 (SEQ ID NO:6). In some embodiments, the HPV antigens are E6 and E7. In some embodiments, the fusion protein comprises the sequence of SEQ ID NO: 19. In some embodiments, the fusion protein comprises the sequence of SEQ ID NO:21. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen and at least one HPV E6 antigen is an HPV type 18 antigen. In some embodiments, at least one HPV E7 antigen is an HPV type 16 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen and at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 16 antigen and at least one HPV E7 antigen is an HPV type 18 antigen.
In some embodiments the HPV E6 and E7 antigens are selected from SEQ ID NO: 1-4. In other embodiments the HPV E6 and E7 antigens are at least 70%, 75%, 80%, 85%, 90%, 95%, 98%, 99% or 100%, or any range derivable therein, identical to any combination of SEQ ID NO: 1-4. In other embodiments the HPV E6 and E7 antigens are at least 70%, 75%, 80%, 85%, 90%, 95%, 98%, 99% or 100%, or any range derivable therein, identical to SEQ ID NO: 1-4. In still other embodiments, the HPV E6 antigen is a 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115 or 120, or any range derivable therein, subset of contiguous amino acids of SEQ ID NO: 1 and/or 3 and the HPV E7 antigen is a 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115 or 120, or any range derivable therein, subset of contiguous amino acids of SEQ ID NO: 2 and/or 4.
Also disclosed is a vector comprising a polynucleotide sequence encoding a fusion protein comprising an anti-CD40 antibody or fragment thereof comprising at least three complementarity determining regions from an anti-CD40 antibody, at least one peptide linker and at least one human papillomavirus (HPV) E6 or E7 antigen, wherein the E6 or E7 antigen or antigens are HPV type 16 or HPV type 18 antigens. In some embodiments, the anti-CD40 antibody or fragment thereof comprises an anti-CD40 antibody light chain variable region. In some embodiments, the anti-CD40 antibody or fragment thereof comprises an anti-CD40 antibody heavy chain variable region. In some embodiments, the polynucleotide sequence encodes at least one HPV type 16 E6 antigen, at least one HPV type 16 E7 antigen or at least one HPV type 18 E6 antigen and at least one HPV type 18 E7 antigen. In some embodiments, the polynucleotide sequence encodes a polypeptide comprising SEQ ID NO: 19. In some embodiments, the polynucleotide sequence encodes a polypeptide comprising SEQ ID NO: 21. In some embodiments, the polynucleotide sequence encodes at least one HPV type 16 E6 antigen, at least one HPV type 16 E7 antigen, at least one HPV type 18 E6 antigen and at least one HPV type 18 E7 antigen.
Also disclosed is a method for preventing a human papillomavirus (HPV) infection comprising administering to a patient a composition comprising a dendritic cell targeting complex comprising an anti-CD40 antibody or fragment thereof comprising at least six complementarity determining regions from an anti-CD40 antibody, at least one peptide linker and at least one human papillomavirus (HPV) E6 or E7 antigen, wherein the E6 or E7 antigen or antigens are HPV type 16 or HPV type 18 antigens. In some embodiments, the anti-CD40 antibody or fragment thereof comprises an anti-CD40 antibody light chain variable region and an anti-CD40 antibody heavy chain variable region. In some embodiments, the anti-CD40 antibody or fragment thereof is humanized. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen and at least one HPV E7 antigen is an HPV type 16 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen, at least one HPV E7 antigen is an HPV type 16 antigen, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, the dendritic cell targeting complex comprises SEQ ID NO: 19. In some embodiments, dendritic cell targeting complex comprises SEQ ID NO: 21. In some embodiments, the composition further comprises an adjuvant. In some embodiments, the method further comprises administering to the patient a separate HPV vaccine. In some embodiments, the separate HPV vaccine is Gardasil™ or Cervarix™.
Also disclosed is a method for treating a human papillomavirus (HPV) infection comprising administering to a patient a composition comprising a dendritic cell targeting complex comprising an anti-CD40 antibody or fragment thereof comprising at least six complementarity determining regions from an anti-CD40 antibody, at least one peptide linker and at least one human papillomavirus (HPV) E6 or E7 antigen, wherein the E6 or E7 antigen or antigens are HPV type 16 or HPV type 18 antigens. In some embodiments, the anti-CD40 antibody or fragment thereof comprises an anti-CD40 antibody light chain variable region and an anti-CD40 antibody heavy chain variable region. In some embodiments, the anti-CD40 antibody or fragment thereof is humanized. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen and at least one HPV E7 antigen is an HPV type 16 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen, at least one HPV E7 antigen is an HPV type 16 antigen, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, the dendritic cell targeting complex comprises SEQ ID NO: 19. In some embodiments, the dendritic cell targeting complex comprises SEQ ID NO: 21. In some embodiments, the method further comprises administering to the patient a separate HPV treatment.
Also disclosed is a method for inducing an immune response to at least one HPV epitope comprising administering to a patient a composition comprising a dendritic cell targeting complex comprising an anti-CD40 antibody or fragment thereof comprising at least six complementarity determining regions from an anti-CD40 antibody, at least one peptide linker and at least one human papillomavirus (HPV) E6 or E7 antigen, wherein the E6 or E7 antigen or antigens are HPV type 16 or HPV type 18 antigens. In some embodiments, the anti-CD40 antibody or fragment thereof comprises an anti-CD40 antibody light chain variable region and an anti-CD40 antibody heavy chain variable region. In some embodiments, the anti-CD40 antibody or fragment thereof is humanized. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen and at least one HPV E7 antigen is an HPV type 16 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen, at least one HPV E7 antigen is an HPV type 16 antigen, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, the dendritic cell targeting complex comprises SEQ ID NO: 19. In some embodiments, the dendritic cell targeting complex comprises SEQ ID NO: 21. In some embodiments, the composition further comprises an adjuvant. In some embodiments, the method further comprises administering to the patient a separate HPV vaccine. In some embodiments, the separate HPV vaccine is Gardasil™ or Cervarix™.
Also disclosed is a method for potentiating an immune response to at least one HPV epitope comprising administering to a patient a composition comprising a dendritic cell targeting complex comprising an anti-CD40 antibody or fragment thereof comprising at least six complementarity determining regions from an anti-CD40 antibody, at least one peptide linker and at least one human papillomavirus (HPV) E6 or E7 antigen, wherein the E6 or E7 antigen or antigens are HPV type 16 or HPV type 18 antigens. In some embodiments, the anti-CD40 antibody or fragment thereof comprises an anti-CD40 antibody light chain variable region and an anti-CD40 antibody heavy chain variable region. In some embodiments, the anti-CD40 antibody or fragment thereof is humanized. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen and at least one HPV E7 antigen is an HPV type 16 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen, at least one HPV E7 antigen is an HPV type 16 antigen, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, the dendritic cell targeting complex comprises SEQ ID NO: 19. In some embodiments, the dendritic cell targeting complex comprises SEQ ID NO: 21. In some embodiments, potentiating an immune response is directed towards potentiating or increasing or enhancing memory T-cells. In some embodiments, the method further comprises administering to the patient a separate HPV treatment.
Also disclosed is a method for preventing a human papillomavirus (HPV) related disease comprising administering to a patient a composition comprising a dendritic cell targeting complex comprising an anti-CD40 antibody or fragment thereof comprising at least six complementarity determining regions from an anti-CD40 antibody, at least one peptide linker and at least one human papillomavirus (HPV) E6 or E7 antigen, wherein the E6 or E7 antigen or antigens are HPV type 16 or HPV type 18 antigens. In some embodiments, the anti-CD40 antibody or fragment thereof comprises an anti-CD40 antibody light chain variable region and an anti-CD40 antibody heavy chain variable region. In some embodiments, the anti-CD40 antibody or fragment thereof is humanized. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen and at least one HPV E7 antigen is an HPV type 16 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen, at least one HPV E7 antigen is an HPV type 16 antigen, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, the dendritic cell targeting complex comprises SEQ ID NO: 19. In some embodiments, the dendritic cell targeting complex comprises SEQ ID NO: 21. In some embodiments, the composition further comprises an adjuvant. In some embodiments, the HPV related disease is dysplasia, benign neoplasia, pre-malignant neoplasia or cancer. In some embodiments, the HPV related disease is cancer. In some embodiments, the cancer is cancer of the cervix, vulva, vagina, penis, anus, oropharynx, throat or lung. In some embodiments, the method further comprises administering to the patient a separate HPV vaccine. In some embodiments, the separate HPV vaccine is Gardasil™ or Cervarix™.
Also disclosed is a method for treating a human papillomavirus (HPV) related disease comprising administering to a patient a composition comprising a dendritic cell targeting complex comprising an anti-CD40 antibody or fragment thereof comprising at least six complementarity determining regions from an anti-CD40 antibody, at least one peptide linker and at least one human papillomavirus (HPV) E6 or E7 antigen, wherein the E6 or E7 antigen or antigens are HPV type 16 or HPV type 18 antigens. In some embodiments, the anti-CD40 antibody or fragment thereof comprises an anti-CD40 antibody light chain variable region and an anti-CD40 antibody heavy chain variable region. In some embodiments, the anti-CD40 antibody or fragment thereof is humanized. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen and at least one HPV E7 antigen is an HPV type 16 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen, at least one HPV E7 antigen is an HPV type 16 antigen, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, the dendritic cell targeting complex comprises SEQ ID NO: 19. In some embodiments, the dendritic cell targeting complex comprises SEQ ID NO: 21. In some embodiments, the HPV related disease is dysplasia, benign neoplasia, pre-malignant neoplasia or cancer. In some embodiments, the HPV related disease is cancer. In some embodiments, the cancer is cancer of the cervix, vulva, vagina, penis, anus, oropharynx, throat or lung. In yet further embodiments, the cancer is head and neck cancer. In some embodiments, the method further comprises administering to the patient a separate treatment. In some embodiments, the method further comprises administering to the patient a cancer treatment.
Also disclosed is a method of inhibiting HPV-infected cells in a patient comprising administering to the patient an effective amount of a composition comprising any of the above fusion proteins or vectors. In some embodiments, the HPV-infected cells are in a tumor.
Also disclosed is a method of reducing the size or mass of a tumor in a patient that is suffering from an HPV infection or the tumor comprises HPV-infected cells, comprising administering to the patient an effective amount of a composition comprising any of the above fusion proteins or vectors. The percent reduction in size or mass of the tumor or the percent regression of the tumor during or following treatment may be at least 10%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70% 75%, 80%, 85%, 90%, 95% to 100% or any derivable range therein. The percent reduction in size or mass of the tumor or the percent regression of the tumor may be such that the tumor size eases discomfort and improves the patient's quality of life or leads to, or is associated with, a clinically favorable outcome.
Disclosed is a method of extending survival or a patient or subject suffering from an HPV related disease comprising administering to a patient a composition comprising a dendritic cell targeting complex comprising an anti-CD40 antibody or fragment thereof comprising at least six complementarity determining regions from an anti-CD40 antibody, at least one peptide linker and at least one human papillomavirus (HPV) E6 or E7 antigen, wherein the E6 or E7 antigen or antigens are HPV type 16 or HPV type 18 antigens. In some embodiments, the anti-CD40 antibody or fragment thereof comprises an anti-CD40 antibody light chain variable region and an anti-CD40 antibody heavy chain variable region. In some embodiments, the anti-CD40 antibody or fragment thereof is humanized. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen and at least one HPV E7 antigen is an HPV type 16 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, at least one HPV E6 antigen is an HPV type 16 antigen, at least one HPV E7 antigen is an HPV type 16 antigen, at least one HPV E6 antigen is an HPV type 18 antigen and at least one HPV E7 antigen is an HPV type 18 antigen. In some embodiments, the dendritic cell targeting complex comprises SEQ ID NO: 19. In some embodiments, the dendritic cell targeting complex comprises SEQ ID NO: 21. In some embodiments, the HPV related disease is dysplasia, benign neoplasia, pre-malignant neoplasia or cancer. In some embodiments, the HPV related disease is cancer. In some embodiments, the cancer is cancer of the cervix, vulva, vagina, penis, anus, oropharynx, throat or lung. In yet further embodiments, the cancer is head and neck cancer. In some embodiments, the method further comprises administering to the patient a separate treatment. In some embodiments, the method further comprises administering to the patient a cancer treatment. In some aspects, survival is extended by a period of 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 days, or any range derivable therein. In some aspects, survival is extended by a period of 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 weeks, or any range derivable therein. In some aspects, survival is extended by a period of 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 months, or any range derivable therein. In some aspects, survival is extended by a period of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20, 25 or 30 years, or any range derivable therein.
Any of the methods disclosed above may be implemented using any of the fusion proteins, compositions, and/or vectors disclosed above.
As used herein the specification, “a” or “an” may mean one or more. As used herein in the claim(s), when used in conjunction with the word “comprising”, the words “a” or “an” may mean one or more than one.
The use of the term “or” in the claims is used to mean “and/or” unless explicitly indicated to refer to alternatives only or the alternatives are mutually exclusive, although the disclosure supports a definition that refers to only alternatives and “and/or.” As used herein “another” may mean at least a second or more.
Throughout this application, the term “about” is used to indicate that a value includes the inherent variation of error for the device, the method being employed to determine the value, or the variation that exists among the study subjects.
Other objects, features and advantages of the present invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and the specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
The following drawings form part of the present specification and are included to further demonstrate certain aspects of the present invention. The invention may be better understood by reference to one or more of these drawings in combination with the detailed description of specific embodiments presented herein.
As described in the Examples, an anti-CD40 antibody to which an HPV E6 and E7 antigen has been fused (called hereafter ‘anti-CD40-HPV 16.E6/7’) has been shown to induce a strong immune response against said antigens (including a strong T-cell response). This provides an efficient and effective method of eliciting and potentiating an immune response to HPV antigens. Moreover, an anti-CD40-HPV16.E6/7 has been used in a prime-boost strategy in combination with a poly IC adjuvant to suppress TC-1 tumor progression in human CD40 transgenic mice. Thus, it has been demonstrated that said anti-CD40-HPV16.E6/7 can elicit E6/E7-specific CD8+ cytotoxic T lymphocytes and when administered with a poly IC adjuvant, serves as an efficient vaccine.
In certain embodiments, there are recombinant nucleic acids encoding the proteins, polypeptides, or peptides described herein. Polynucleotides contemplated for use in methods and compositions include those encoding antibodies to DC receptors or binding portions thereof, HPV antigens, linker regions or adjuvants.
As used in this application, the term “polynucleotide” refers to a nucleic acid molecule that either is recombinant or has been isolated free of total genomic nucleic acid. Included within the term “polynucleotide” are oligonucleotides (nucleic acids 100 residues or fewer in length), recombinant vectors, including, for example, plasmids, cosmids, phage, viruses, and the like. Polynucleotides include, in certain aspects, regulatory sequences, isolated substantially away from their naturally occurring genes or protein encoding sequences. Polynucleotides may be single-stranded (coding or antisense) or double-stranded, and may be RNA, DNA (genomic, cDNA or synthetic), analogs thereof, or a combination thereof. Additional coding or non-coding sequences may, but need not, be present within a polynucleotide.
In this respect, the term “gene,” “polynucleotide,” or “nucleic acid” is used to refer to a nucleic acid that encodes a protein, polypeptide, or peptide (including any sequences required for proper transcription, post-translational modification, or localization). As will be understood by those in the art, this term encompasses genomic sequences, expression cassettes, cDNA sequences, and smaller engineered nucleic acid segments that express, or may be adapted to express, proteins, polypeptides, domains, peptides, fusion proteins, and mutants. A nucleic acid encoding all or part of a polypeptide may contain a contiguous nucleic acid sequence encoding all or a portion of such a polypeptide. It also is contemplated that a particular polypeptide may be encoded by nucleic acids containing variations having slightly different nucleic acid sequences but, nonetheless, encode the same or substantially similar protein (see above).
In particular embodiments, there are isolated nucleic acid segments and recombinant vectors incorporating nucleic acid sequences that encode polypeptides (e.g., an antibody or fragment thereof) that bind to DC receptors, are HPV antigens, are linker regions or are fusion proteins comprising any combination of a DC receptor antibody or antibodies or fragments thereof, HPV antigens (such as E6 or E7 from any HPV type) and linker regions. The term “recombinant” may be used in conjunction with a polypeptide or the name of a specific polypeptide, and this generally refers to a polypeptide produced from a nucleic acid molecule that has been manipulated in vitro or that is a replication product of such a molecule.
The nucleic acid segments, regardless of the length of the coding sequence itself, may be combined with other nucleic acid sequences, such as promoters, polyadenylation signals, additional restriction enzyme sites, multiple cloning sites, other coding segments, and the like, such that their overall length may vary considerably. It is therefore contemplated that a nucleic acid fragment of almost any length may be employed, with the total length preferably being limited by the ease of preparation and use in the intended recombinant nucleic acid protocol. In some cases, a nucleic acid sequence may encode a polypeptide sequence with additional heterologous coding sequences, for example to allow for purification of the polypeptide, transport, secretion, post-translational modification, or for therapeutic benefits such as targeting or efficacy. As discussed above, a tag or other heterologous polypeptide may be added to the modified polypeptide-encoding sequence, wherein “heterologous” refers to a polypeptide that is not the same as the modified polypeptide.
In certain embodiments, there are polynucleotide variants having substantial identity to the sequences disclosed herein; those comprising at least 70%, 75%, 80%, 85%, 90%, 95%, 96%, 97%, 98%, or 99% or higher sequence identity, including all values and ranges there between, compared to a polynucleotide sequence provided herein using the methods described herein (e.g., BLAST analysis using standard parameters). In certain aspects, the isolated polynucleotide will comprise a nucleotide sequence encoding a polypeptide that has at least 90%, preferably 95% and above, identity to an amino acid sequence described herein, over the entire length of the sequence; or a nucleotide sequence complementary to said isolated polynucleotide.
Vectors
Polypeptides may be encoded by a nucleic acid molecule. The nucleic acid molecule can be in the form of a nucleic acid vector. The term “vector” is used to refer to a carrier nucleic acid molecule into which a heterologous nucleic acid sequence can be inserted for introduction into a cell where it can be replicated and expressed. A nucleic acid sequence can be “heterologous,” which means that it is in a context foreign to the cell in which the vector is being introduced or to the nucleic acid in which is incorporated, which includes a sequence homologous to a sequence in the cell or nucleic acid but in a position within the host cell or nucleic acid where it is ordinarily not found. Vectors include DNAs, RNAs, plasmids, cosmids, viruses (bacteriophage, animal viruses, and plant viruses), and artificial chromosomes (e.g., YACs). One of skill in the art would be well equipped to construct a vector through standard recombinant techniques (for example Sambrook et al., 2001; Ausubel et al., 1996, both incorporated herein by reference). Vectors may be used in a host cell to produce an antibody or fragment thereof that binds a dendritic cell receptor, an HPV antigen or antigens (e.g. E6 and/or E7 from one or multiple HPV types), a linker or multiple linker regions, an adjuvant or multiple adjuvants, any combination of the aforementioned proteins or a fusion protein or fusion proteins comprising any combination of the aforementioned proteins.
The term “expression vector” refers to a vector containing a nucleic acid sequence coding for at least part of a gene product capable of being transcribed. In some cases, RNA molecules are then translated into a protein, polypeptide, or peptide. Expression vectors can contain a variety of “control sequences,” which refer to nucleic acid sequences necessary for the transcription and possibly translation of an operably linked coding sequence in a particular host organism. In addition to control sequences that govern transcription and translation, vectors and expression vectors may contain nucleic acid sequences that serve other functions as well and are described herein.
Host Cells
As used herein, the terms “cell,” “cell line,” and “cell culture” may be used interchangeably. All of these terms also include their progeny, which is any and all subsequent generations. It is understood that all progeny may not be identical due to deliberate or inadvertent mutations. In the context of expressing a heterologous nucleic acid sequence, “host cell” refers to a prokaryotic or eukaryotic cell, and it includes any transformable organism that is capable of replicating a vector or expressing a heterologous gene encoded by a vector. A host cell can, and has been, used as a recipient for vectors or viruses. A host cell may be “transfected” or “transformed,” which refers to a process by which exogenous nucleic acid, such as a recombinant protein-encoding sequence, is transferred or introduced into the host cell. A transformed cell includes the primary subject cell and its progeny.
Some vectors may employ control sequences that allow it to be replicated and/or expressed in both prokaryotic and eukaryotic cells. One of skill in the art would further understand the conditions under which to incubate all of the above described host cells to maintain them and to permit replication of a vector. Also understood and known are techniques and conditions that would allow large-scale production of vectors, as well as production of the nucleic acids encoded by vectors and their cognate polypeptides, proteins, or peptides.
Expression Systems
Numerous expression systems exist that comprise at least a part or all of the compositions discussed above. Prokaryote- and/or eukaryote-based systems can be employed for use with an embodiment to produce nucleic acid sequences, or their cognate polypeptides, proteins and peptides. Many such systems are commercially and widely available.
The insect cell/baculovirus system can produce a high level of protein expression of a heterologous nucleic acid segment, such as described in U.S. Pat. Nos. 5,871,986, 4,879,236, both herein incorporated by reference, and which can be bought, for example, under the name MAXBAC® 2.0 from INVITROGEN® and BACPACK™ BACULOVIRUS EXPRESSION SYSTEM FROM CLONTECH®.
In addition to the disclosed expression systems, other examples of expression systems include STRATAGENE®'s COMPLETE CONTROL Inducible Mammalian Expression System, which involves a synthetic ecdysone-inducible receptor, or its pET Expression System, an E. coli expression system. Another example of an inducible expression system is available from INVITROGEN®, which carries the T-REX™ (tetracycline-regulated expression) System, an inducible mammalian expression system that uses the full-length CMV promoter. INVITROGEN® also provides a yeast expression system called the Pichia methanolica Expression System, which is designed for high-level production of recombinant proteins in the methylotrophic yeast Pichia methanolica. One of skill in the art would know how to express a vector, such as an expression construct, to produce a nucleic acid sequence or its cognate polypeptide, protein, or peptide.
Substitutional variants typically contain the exchange of one amino acid for another at one or more sites within the protein, and may be designed to modulate one or more properties of the polypeptide, with or without the loss of other functions or properties. Substitutions may be conservative, that is, one amino acid is replaced with one of similar shape and charge. Conservative substitutions are well known in the art and include, for example, the changes of: alanine to serine; arginine to lysine; asparagine to glutamine or histidine; aspartate to glutamate; cysteine to serine; glutamine to asparagine; glutamate to aspartate; glycine to proline; histidine to asparagine or glutamine; isoleucine to leucine or valine; leucine to valine or isoleucine; lysine to arginine; methionine to leucine or isoleucine; phenylalanine to tyrosine, leucine or methionine; serine to threonine; threonine to serine; tryptophan to tyrosine; tyrosine to tryptophan or phenylalanine; and valine to isoleucine or leucine. Alternatively, substitutions may be non-conservative such that a function or activity of the polypeptide is affected. Non-conservative changes typically involve substituting a residue with one that is chemically dissimilar, such as a polar or charged amino acid for a nonpolar or uncharged amino acid, and vice versa.
Proteins may be recombinant, or synthesized in vitro. Alternatively, a non-recombinant or recombinant protein may be isolated from bacteria. It is also contemplated that a bacteria containing such a variant may be implemented in compositions and methods. Consequently, a protein need not be isolated.
The term “functionally equivalent codon” is used herein to refer to codons that encode the same amino acid, such as the six codons for arginine or serine, and also refers to codons that encode biologically equivalent amino acids (see Table, below).
It also will be understood that amino acid and nucleic acid sequences may include additional residues, such as additional N- or C-terminal amino acids, or 5′ or 3′ sequences, respectively, and yet still be essentially as set forth in one of the sequences disclosed herein, so long as the sequence meets the criteria set forth above, including the maintenance of biological protein activity where protein expression is concerned. The addition of terminal sequences particularly applies to nucleic acid sequences that may, for example, include various non-coding sequences flanking either of the 5′ or 3′ portions of the coding region.
The following is a discussion based upon changing of the amino acids of a protein to create an equivalent, or even an improved, second-generation molecule. For example, certain amino acids may be substituted for other amino acids in a protein structure without appreciable loss of interactive binding capacity with structures such as, for example, antigen-binding regions of antibodies or binding sites on substrate molecules or loss of antigenicity in antigenic peptides or proteins. Since it is the interactive capacity and nature of a protein that defines that protein's biological functional activity, certain amino acid substitutions can be made in a protein sequence, and in its underlying DNA coding sequence, and nevertheless produce a protein with like properties. It is thus contemplated by the inventors that various changes may be made in the DNA sequences of genes without appreciable loss of their biological utility or activity.
In making such changes, the hydropathic index of amino acids may be considered. The importance of the hydropathic amino acid index in conferring interactive biologic function on a protein is generally understood in the art (Kyte and Doolittle, 1982). It is accepted that the relative hydropathic character of the amino acid contributes to the secondary structure of the resultant protein, which in turn defines the interaction of the protein with other molecules, for example, enzymes, substrates, receptors, DNA, antibodies, antigens, and the like.
It also is understood in the art that the substitution of like amino acids can be made effectively on the basis of hydrophilicity. U.S. Pat. No. 4,554,101, incorporated herein by reference, states that the greatest local average hydrophilicity of a protein, as governed by the hydrophilicity of its adjacent amino acids, correlates with a biological property of the protein. It is understood that an amino acid can be substituted for another having a similar hydrophilicity value and still produce a biologically equivalent and immunologically equivalent protein.
As outlined above, amino acid substitutions generally are based on the relative similarity of the amino acid side-chain substituents, for example, their hydrophobicity, hydrophilicity, charge, size, and the like. Exemplary substitutions that take into consideration the various foregoing characteristics are well known and include: arginine and lysine; glutamate and aspartate; serine and threonine; glutamine and asparagine; and valine, leucine and isoleucine.
It is contemplated that in compositions there is between about 0.001 mg and about 10 mg of total polypeptide, peptide, and/or protein per ml. Thus, the concentration of protein (including a fusion protein) in a composition can be about, at least about or at most about 0.001, 0.010, 0.050, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0 mg/ml or more (or any range derivable therein). Of this, about, at least about, or at most about 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100% may be an antibody that binds DC receptor or a fusion protein comprising an antibody that binds a DC receptor, and may be used in combination with other HPV antigens, linker regions or adjuvants described herein.
Polypeptides and Polypeptide Production
Embodiments involve polypeptides, peptides, and proteins and immunogenic fragments thereof for use in various aspects described herein. For example, specific antibodies are assayed for or used in binding to DC receptors and presenting HPV antigens. In specific embodiments, all or part of proteins described herein can also be synthesized in solution or on a solid support in accordance with conventional techniques. Various automatic synthesizers are commercially available and can be used in accordance with known protocols. See, for example, Stewart and Young, (1984); Tam et al., (1983); Merrifield, (1986); and Barany and Merrifield (1979), each incorporated herein by reference. Alternatively, recombinant DNA technology may be employed wherein a nucleotide sequence that encodes a peptide or polypeptide is inserted into an expression vector, transformed or transfected into an appropriate host cell and cultivated under conditions suitable for expression.
One embodiment includes the use of gene transfer to cells, including microorganisms, for the production and/or presentation of proteins. The gene for the protein of interest may be transferred into appropriate host cells followed by culture of cells under the appropriate conditions. A nucleic acid encoding virtually any polypeptide may be employed. The generation of recombinant expression vectors, and the elements included therein, are discussed herein. Alternatively, the protein to be produced may be an endogenous protein normally synthesized by the cell used for protein production.
In a certain aspects an DC receptor or receptor fragment comprises substantially all of the extracellular domain of a protein which has at least 85% identity, at least 90% identity, at least 95% identity, or at least 97-99% identity, including all values and ranges there between, to a sequence selected over the length of the fragment sequence.
Also included in immunogenic compositions are fusion proteins composed of HPV antigens, or immunogenic fragments of HPV antigens (e.g., E6 or E7). HPV antigens may be from any type (e.g. type 16 or type 18). For example an HPV antigen may be selected from a single or combination of HPV type. An HPV antigen or combination of HPV antigen may be from HPV type 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, or 120. Alternatively, embodiments also include individual fusion proteins of HPV proteins or immunogenic fragments thereof or anti-DC receptor antibodies or fragments thereof, as a fusion protein with heterologous sequences such as a provider of T-cell epitopes or purification tags, for example: β-galactosidase, glutathione-S-transferase, green fluorescent proteins (GFP), epitope tags such as FLAG, myc tag, poly histidine, or viral surface proteins such as influenza virus haemagglutinin, or bacterial proteins such as tetanus toxoid, diphtheria toxoid, CRM197.
Antibodies and Antibody-Like Molecules
In certain aspects, one or more antibodies or antibody-like molecules (e.g., polypeptides comprising antibody CDR domains) may be obtained or produced which have a specificity for a DC receptor. These antibodies may be used in various diagnostic or therapeutic applications described herein.
As used herein, the term “antibody” is intended to refer broadly to any immunologic binding agent such as IgG, IgM, IgA, IgD and IgE as well as polypeptides comprising antibody CDR domains that retain antigen binding activity. Thus, the term “antibody” is used to refer to any antibody-like molecule that has an antigen binding region, and includes antibody fragments such as Fab′, Fab, F(ab′)2, single domain antibodies (DABs), Fv, scFv (single chain Fv), and polypeptides with antibody CDRs, scaffolding domains that display the CDRs (e.g., anticalins) or a nanobody. For example, the nanobody can be antigen-specific VHH (e.g., a recombinant VHH) from a camelid IgG2 or IgG3, or a CDR-displaying frame from such camelid Ig. The techniques for preparing and using various antibody-based constructs and fragments are well known in the art. Means for preparing and characterizing antibodies are also well known in the art (See, e.g., Antibodies: A Laboratory Manual, Cold Spring Harbor Laboratory, 1988; incorporated herein by reference).
“Mini-antibodies” or “minibodies” are also contemplated for use with embodiments. Minibodies are sFv polypeptide chains which include oligomerization domains at their C-termini, separated from the sFv by a hinge region (Pack, et al., 1992). The oligomerization domain comprises self-associating a-helices, e.g., leucine zippers, that can be further stabilized by additional disulfide bonds. The oligomerization domain is designed to be compatible with vectorial folding across a membrane, a process thought to facilitate in vivo folding of the polypeptide into a functional binding protein. Generally, minibodies are produced using recombinant methods well known in the art. See, e.g., Pack et al. (1992); Cumber et al. (1992).
Antibody-like binding peptidomimetics are also contemplated in embodiments. Liu et al., 2003 describe “antibody like binding peptidomimetics” (ABiPs), which are peptides that act as pared-down antibodies and have certain advantages of longer serum half-life as well as less cumbersome synthesis methods.
Alternative scaffolds for antigen binding peptides, such as CDRs are also available and can be used to generate DC receptor-binding molecules in accordance with the embodiments. Generally, a person skilled in the art knows how to determine the type of protein scaffold on which to graft at least one of the CDRs arising from the original antibody. More particularly, it is known that to be selected such scaffolds must meet the greatest number of criteria as follows (Skerra, 2000): good phylogenetic conservation; known three-dimensional structure (as, for example, by crystallography, NMR spectroscopy or any other technique known to a person skilled in the art); small size; few or no post-transcriptional modifications; and/or easy to produce, express and purify.
The origin of such protein scaffolds can be, but is not limited to, the structures selected among: fibronectin and preferentially fibronectin type III domain 10, lipocalin, anticalin (Skerra, 2001), protein Z arising from domain B of protein A of Staphylococcus aureus, thioredoxin A or proteins with a repeated motif such as the “ankyrin repeat” (Kohl et al., 2003), the “armadillo repeat”, the “leucine-rich repeat” and the “tetratricopeptide repeat”. For example, anticalins or lipocalin derivatives are a type of binding proteins that have affinities and specificities for various target molecules and can be used as DC receptor-binding molecules. Such proteins are described in US Patent Publication Nos. 20100285564, 20060058510, 20060088908, 20050106660, and PCT Publication No. WO2006/056464, incorporated herein by reference.
Scaffolds derived from toxins such as, for example, toxins from scorpions, insects, plants, mollusks, etc., and the protein inhibiters of neuronal NO synthase (PIN) may also be used in certain aspects.
Monoclonal antibodies (MAbs) are recognized to have certain advantages, e.g., reproducibility and large-scale production. Embodiments include monoclonal antibodies of the human, murine, monkey, rat, hamster, rabbit and chicken origin.
“Humanized” antibodies are also contemplated, as are chimeric antibodies from mouse, rat, or other species, bearing human constant and/or variable region domains, bispecific antibodies, recombinant and engineered antibodies and fragments thereof. As used herein, the term “humanized” immunoglobulin refers to an immunoglobulin comprising a human framework region and one or more CDR's from a non-human (usually a mouse or rat) immunoglobulin. The non-human immunoglobulin providing the CDR's is called the “donor” and the human immunoglobulin providing the framework is called the “acceptor”. A “humanized antibody” is an antibody comprising a humanized light chain and a humanized heavy chain immunoglobulin. In order to describe antibodies of some embodiments, the strength with which an antibody molecule binds an epitope, known as affinity, can be measured. The affinity of an antibody may be determined by measuring an association constant (Ka) or dissociation constant(Kd). Antibodies deemed useful in certain embodiments may have an association constant of about, at least about, or at most about 10e6, 10e7, 10e8,10e9 or 10e10 M or any range derivable therein. Similarly, in some embodiments antibodies may have a dissociation constant of about, at least about or at most about 10e-6, 10e-7, 10e-8, 10e-9 or 10e-10. M or any range derivable therein. These values are reported for antibodies discussed herein and the same assay may be used to evaluate the binding properties of such antibodies
In certain embodiments, a polypeptide that specifically binds to DC receptors is able to bind a DC receptor on the surface of the cells and present an HPV antigen that allows the generation of a robust immune response. Moreover, in some embodiments, the polypeptide that is used can provided protective immunity against HPV or provides a means of therapy for HPV by generating a robust immune response.
1. Methods for Generating Antibodies
Methods for generating antibodies (e.g., monoclonal antibodies and/or monoclonal antibodies) are known in the art. Briefly, a polyclonal antibody is prepared by immunizing an animal with a DC receptor polypeptide or a portion thereof in accordance with embodiments and collecting antisera from that immunized animal.
A wide range of animal species can be used for the production of antisera. Typically the animal used for production of antisera is a rabbit, a mouse, a rat, a hamster, a guinea pig or a goat. The choice of animal may be decided upon the ease of manipulation, costs or the desired amount of sera, as would be known to one of skill in the art. It will be appreciated that antibodies can also be produced transgenically through the generation of a mammal or plant that is transgenic for the immunoglobulin heavy and light chain sequences of interest and production of the antibody in a recoverable form therefrom. In connection with the transgenic production in mammals, antibodies can be produced in, and recovered from, the milk of goats, cows, or other mammals. See, e.g., U.S. Pat. Nos. 5,827,690, 5,756,687, 5,750,172, and 5,741,957.
As is also well known in the art, the immunogenicity of a particular immunogen composition can be enhanced by the use of non-specific stimulators of the immune response, known as adjuvants. Suitable adjuvants include any acceptable immunostimulatory compound, such as cytokines, chemokines, cofactors, toxins, plasmodia, synthetic compositions or vectors encoding such adjuvants.
Adjuvants that may be used in accordance with embodiments include, but are not limited to, IL-1, IL-2, IL-4, IL-7, IL-12, -interferon, GMCSP, BCG, aluminum hydroxide, MDP compounds, such as thur-MDP and nor-MDP, CGP (MTP-PE), lipid A, poly IC, montaninde, GMCSF, and monophosphoryl lipid A (MPL). RIBI, which contains three components extracted from bacteria, MPL, trehalose dimycolate (TDM) and cell wall skeleton (CWS) in a 2% squalene/Tween 80 emulsion is also contemplated. MHC antigens may even be used. Exemplary adjuvants may include complete Freund's adjuvant (a non-specific stimulator of the immune response containing killed Mycobacterium tuberculosis), incomplete Freund's adjuvants and/or aluminum hydroxide adjuvant.
In addition to adjuvants, it may be desirable to coadminister biologic response modifiers (BRM), which have been shown to upregulate T cell immunity or downregulate suppressor cell activity. Such BRMs include, but are not limited to, Cimetidine (CIM; 1200 mg/d) (Smith/Kline, Pa.); low-dose Cyclophosphamide (CYP; 300 mg/m2) (Johnson/Mead, N.J.), cytokines such as -interferon, IL-2, or IL-12 or genes encoding proteins involved in immune helper functions, such as B-7.
The amount of immunogen composition used in the production of antibodies varies upon the nature of the immunogen as well as the animal used for immunization. A variety of routes can be used to administer the immunogen including but not limited to subcutaneous, intramuscular, intradermal, intraepidermal, intravenous, intratumoral and intraperitoneal. The production of antibodies may be monitored by sampling blood of the immunized animal at various points following immunization.
MAbs may be readily prepared through use of well-known techniques, such as those exemplified in U.S. Pat. No. 4,196,265, incorporated herein by reference. Typically, this technique involves immunizing a suitable animal with a selected immunogen composition, e.g., a purified or partially purified protein, polypeptide, peptide or domain, be it a wild-type or mutant composition. The immunizing composition is administered in a manner effective to stimulate antibody producing cells.
The methods for generating monoclonal antibodies (MAbs) generally begin along the same lines as those for preparing polyclonal antibodies. In some embodiments, Rodents such as mice and rats are used in generating monoclonal antibodies. In some embodiments, rabbit, sheep or frog cells are used in generating monoclonal antibodies. The use of rats is well known and may provide certain advantages (Goding, 1986, pp. 60 61). Mice (e.g., BALB/c mice) are routinely used and generally give a high percentage of stable fusions.
MAbs produced by either means may be further purified, if desired, using filtration, centrifugation and various chromatographic methods such as HPLC or affinity chromatography. Fragments of the monoclonal antibodies can be obtained from the monoclonal antibodies so produced by methods which include digestion with enzymes, such as pepsin or papain, and/or by cleavage of disulfide bonds by chemical reduction. Alternatively, monoclonal antibody fragments can be synthesized using an automated peptide synthesizer.
It is also contemplated that a molecular cloning approach may be used to generate monoclonal antibodies. In one embodiment, combinatorial immunoglobulin phagemid libraries are prepared from RNA isolated from the spleen of the immunized animal, and phagemids expressing appropriate antibodies are selected by panning using cells expressing the antigen and control cells. The advantages of this approach over conventional hybridoma techniques are that approximately 104 times as many antibodies can be produced and screened in a single round, and that new specificities are generated by H and L chain combination which further increases the chance of finding appropriate antibodies.
Another embodiment concerns producing antibodies, for example, as is found in U.S. Pat. No. 6,091,001, which describes methods to produce a cell expressing an antibody from a genomic sequence of the cell comprising a modified immunoglobulin locus using Cre-mediated site-specific recombination is disclosed. The method involves first transfecting an antibody-producing cell with a homology-targeting vector comprising a lox site and a targeting sequence homologous to a first DNA sequence adjacent to the region of the immunoglobulin loci of the genomic sequence which is to be converted to a modified region, so the first lox site is inserted into the genomic sequence via site-specific homologous recombination. Then the cell is transfected with a lox-targeting vector comprising a second lox site suitable for Cre-mediated recombination with the integrated lox site and a modifying sequence to convert the region of the immunoglobulin loci to the modified region. This conversion is performed by interacting the lox sites with Cre in vivo, so that the modifying sequence inserts into the genomic sequence via Cre-mediated site-specific recombination of the lox sites.
Alternatively, monoclonal antibody fragments can be synthesized using an automated peptide synthesizer, or by expression of full-length gene or of gene fragments in E. coli.
It is further contemplated that monoclonal antibodies may be further screened or optimized for properties relating to specificity, avidity, half-life, immunogenicity, binding association, binding disassociation, or overall functional properties relative to the intended treatment or protective effect. Thus, it is contemplated that monoclonal antibodies may have 1, 2, 3, 4, 5, 6, or more alterations in the amino acid sequence of 1, 2, 3, 4, 5, or 6 CDRs of monoclonal antibodies or humanized antibodies provided herein. It is contemplated that the amino acid in position 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 of CDR1, CDR2, CDR3, CDR4, CDR5, or CDR6 of the VJ or VDJ region of the light or heavy variable region of antibodies may have an insertion, deletion, or substitution with a conserved or non-conserved amino acid. Such amino acids that can either be substituted or constitute the substitution are disclosed above.
In some embodiments, fragments of a whole antibody can perform the function of binding antigens. Examples of binding fragments are (i) the Fab fragment constituted with the VL, VH, CL and CHI domains; (ii) the Fd fragment consisting of the VH and CHI domains; (iii) the Fv fragment constituted with the VL and VH domains of a single antibody; (iv) the dAb fragment (Ward, 1989; McCafferty et al., 1990; Holt et al., 2003), which is constituted with a VH or a VL domain; (v) isolated CDR regions; (vi) F(ab′)2 fragments, a bivalent fragment comprising two linked Fab fragments (vii) single chain Fv molecules (scFv), wherein a VH domain and a VL domain are linked by a peptide linker which allows the two domains to associate to form an antigen binding site (Bird et al., 1988; Huston et al., 1988); (viii) bispecific single chain Fv dimers (PCT/US92/09965) and (ix) “diabodies”, multivalent or multispecific fragments constructed by gene fusion (WO94/13804; Holliger et al., 1993). Fv, scFv or diabody molecules may be stabilized by the incorporation of disulphide bridges linking the VH and VL domains (Reiter et al., 1996). Minibodies comprising a scFv joined to a CH3 domain may also be made (Hu et al. 1996). The citations in this paragraph are all incorporated by reference.
Antibodies also include bispecific antibodies. Bispecific or bifunctional antibodies form a second generation of monoclonal antibodies in which two different variable regions are combined in the same molecule (Holliger & Winter, 1999). Their use has been demonstrated both in the diagnostic field and in the therapy field from their capacity to recruit new effector functions or to target several molecules on the surface of tumor cells. Where bispecific antibodies are to be used, these may be conventional bispecific antibodies, which can be manufactured in a variety of ways (Holliger et al, 1993), e.g. prepared chemically or from hybrid hybridomas, or may be any of the bispecific antibody fragments mentioned above. These antibodies can be obtained by chemical methods (Glennie et al., 1987; Repp et al., 1995) or somatic methods (Staerz & Bevan, 1986) but likewise by genetic engineering techniques which allow the heterodimerization to be forced and thus facilitate the process of purification of the antibody sought (Merchand et al., 1998). Examples of bispecific antibodies include those of the BiTE™ technology in which the binding domains of two antibodies with different specificity can be used and directly linked via short flexible peptides. This combines two antibodies on a short single polypeptide chain. Diabodies and scFv can be constructed without an Fc region, using only variable domains, potentially reducing the effects of anti-idiotypic reaction. The citations in this paragraph are all incorporated by reference.
Bispecific antibodies can be constructed as entire IgG, as bispecific Fab′2, as Fab′PEG, as diabodies or else as bispecific scFv. Further, two bispecific antibodies can be linked using routine methods known in the art to form tetravalent antibodies.
Bispecific diabodies, as opposed to bispecific whole antibodies, may also be particularly useful because they can be readily constructed and expressed in E. coli. Diabodies (and many other polypeptides such as antibody fragments) of appropriate binding specificities can be readily selected using phage display (WO94/13804) from libraries. If one arm of the diabody is to be kept constant, for instance, with a specificity directed against a DC receptor, then a library can be made where the other arm is varied and an antibody of appropriate specificity selected. Bispecific whole antibodies may be made by alternative engineering methods as described in Ridgeway et al., 1996), which is hereby incorporated by reference.
Antibody and Polypeptide Conjugates
Embodiments provide antibodies and antibody-like molecules against DC receptors, polypeptides and peptides that are linked to at least one agent to form an antibody conjugate or payload. In order to increase the efficacy of antibody molecules as diagnostic or therapeutic agents, it is conventional to link or covalently bind or complex at least one desired molecule or moiety. Such a molecule or moiety may be, but is not limited to, at least one effector or reporter molecule. Effector molecules comprise molecules having a desired activity, e.g., cytotoxic activity or immunostimulatory activity. Non-limiting examples of effector molecules which have been attached to antibodies include adjuvants, toxins, therapeutic enzymes, antibiotics, radio-labeled nucleotides and the like. By contrast, a reporter molecule is defined as any moiety which may be detected using an assay. Non-limiting examples of reporter molecules which have been conjugated to antibodies include enzymes, radiolabels, haptens, fluorescent labels, phosphorescent molecules, chemiluminescent molecules, chromophores, luminescent molecules, photoaffinity molecules, colored particles or ligands, such as biotin. The following US patent applications are incorporated by reference to the extent they disclose antibodies, portions of antibodies, antigens, linkers, specific sequences of such antibodies, antigens and linkers, adjuvants, other components of a fusion protein or therapeutic composition, host cell or composition, sources of dendritic cells and culturing/activating of dendritic cells and derivatives of and from dendritic cells, and methods of use involving such fusion proteins: Ser. Nos. 12/024,036; 12/024,897; 12/025,010; 12/026,095; 12/036,138; 12/036,158; 12/504,463; 12/717,778; 12/717,789; 12/717,804; 12/718,365; 12/882,052; 12/882,052; 13/100,684; 13/208,993; 13/269,951; 13/282,112; 13/415,564; 13/424,582; 13/430,206; 13/594,397; 13/596,526; WO2010/104749; 13/465,371; 13/397,932; PCT/US13/72217; and PCT/US2013/05839.
Certain examples of antibody conjugates are those conjugates in which the antibody is linked to a detectable label. “Detectable labels” are compounds and/or elements that can be detected due to their specific functional properties, and/or chemical characteristics, the use of which allows the antibody to which they are attached to be detected, and/or further quantified if desired.
Antibody conjugates include those intended primarily for use in vitro, where the antibody is linked to a secondary binding ligand and/or to an enzyme (an enzyme tag) that will generate a colored product upon contact with a chromogenic substrate. Examples of suitable enzymes include, but are not limited to, urease, alkaline phosphatase, (horseradish) hydrogen peroxidase or glucose oxidase. Preferred secondary binding ligands are biotin and/or avidin and streptavidin compounds. The use of such labels is well known to those of skill in the art and are described, for example, in U.S. Pat. Nos. 3,817,837; 3,850,752; 3,939,350; 3,996,345; 4,277,437; 4,275,149 and 4,366,241; each incorporated herein by reference.
Molecules containing azido groups may also be used to form covalent bonds to proteins through reactive nitrene intermediates that are generated by low intensity ultraviolet light (Potter & Haley, 1983). In particular, 2- and 8-azido analogues of purine nucleotides have been used as site-directed photoprobes to identify nucleotide binding proteins in crude cell extracts (Owens & Haley, 1987; Atherton et al., 1985). The 2- and 8-azido nucleotides have also been used to map nucleotide binding domains of purified proteins (Khatoon et al., 1989; King et al., 1989; and Dholakia et al., 1989) and may be used as antibody binding agents.
Several methods are known in the art for the attachment or conjugation of an antibody to its conjugate moiety. Some attachment methods involve the use of a metal chelate complex employing, for example, an organic chelating agent such a diethylenetriaminepentaacetic acid anhydride (DTPA); ethylenetriaminetetraacetic acid; N-chloro-p-toluenesulfonamide; and/or tetrachloro-3 -6-diphenylglycouril-3 attached to the antibody (U.S. Pat. Nos. 4,472,509 and 4,938,948, each incorporated herein by reference). Monoclonal antibodies may also be reacted with an enzyme in the presence of a coupling agent such as glutaraldehyde or periodate. Conjugates with fluorescein markers are prepared in the presence of these coupling agents or by reaction with an isothiocyanate. In U.S. Pat. No. 4,938,948 (incorporated herein by reference), imaging of breast tumors is achieved using monoclonal antibodies and the detectable imaging moieties are bound to the antibody using linkers such as methyl-p-hydroxybenzimidate or N-succinimidyl-3-(4-hydroxyphenyl)propionate.
In some embodiments, derivatization of immunoglobulins by selectively introducing sulfhydryl groups in the Fc region of an immunoglobulin, using reaction conditions that do not alter the antibody combining site are contemplated. Antibody conjugates produced according to this methodology are disclosed to exhibit improved longevity, specificity and sensitivity (U.S. Pat. No. 5,196,066, incorporated herein by reference). Site-specific attachment of effector or reporter molecules, wherein the reporter or effector molecule is conjugated to a carbohydrate residue in the Fc region have also been disclosed in the literature (O'Shannessy et al., 1987, incorporated herein by reference). This approach has been reported to produce diagnostically and therapeutically promising antibodies which are currently in clinical evaluation.
2. Dendritic Cell Specific Antibodies
In certain aspects, antibodies used to target HPV antigens to dendritic cells are dendritic cell specific antibodies and bind dendritic cell receptors or receptors expressed by dendritic cells. Some of the antibodies that may be used for this purpose are known in the art.
In some embodiments anti-DCIR antibodies are used to target HPV antigens to dendritic cells. One example includes anti-dendritic cell immunoreceptor monoclonal antibody conjugates, wherein the conjugate comprises antigenic peptides that are loaded or chemically coupled to the antibody. Such antibodies are described in U.S. application No. 61/332,465 and are incorporated herein by reference.
In other embodiments anti-CD40 antibodies are used to target HPV antigens to dendritic cells. Compositions and methods for the expression, secretion and use of anti-CD40 antibodies as vaccines and antigen delivery vectors with one linked antigenic peptides are described in WO 2010/104761; all methods disclosed are incorporated herein by reference. In some embodiments the anti-CD40 antibody comprises the heavy chain and light chain variable region from monoclonal antibody 12E12, 11B6 or 12B4. In other embodiments the anti-CD40 antibody comprises the heavy chain and light chain CDRs from monoclonal antibody 12E12, 11B6 or 12B4.
In certain aspects anti-LOX-1 antibodies are used to target HPV antigens to dendritic cells. One example of such an antibody can be used to target the LOX-1 receptor on immune cells and increase the effectiveness of antigen presentation by LOX-1 expressing antigen presenting cells. Examples of such LOX-1 antibodies are described in WO 2008/103953, the contents of which are incorporated herein by reference.
In other aspects anti-CLEC-6 antibodies are used to target HPV antigens to dendritic cells. One example of such antibodies include anti-CLEC-6 antibodies used to increase the effectiveness of antigen presentation by CLEC-6 expressing antigen presenting cells. Such antibodies are described in WO 2008/103947, the methods and contents of which are incorporated herein by reference.
In yet other embodiments anti-Dectin-1 antibodies are used to target HPV antigens to dendritic cells. Anti-Dectin-1 antibodies that increase the effectiveness of antigen presentation by Dectin-1 expressing antigen presenting cells are described in WO 2008/118587, the contents of which are incorporated herein by reference.
In certain aspects, peptide linkers are used to link dendritic cell specific antibodies and HPV antigens to be presented. Peptide linkers may incorporate glycosylation sites or introduce secondary structure. Additionally these linkers increase the efficiency of expression or stability of the fusion protein and as a result the efficiency of antigen presentation to a dendritic cell. Such linkers may include SSVSPTTSVHPTPTSVPPTPTKSSP (SEQ ID NO: 6); PTSTPADSSTITPTATPTATPTIKG (SEQ ID NO:29); TVTPTATATPSAIVTTITPTATTKP (SEQ ID NO:30); QTPTNTISVTPTNNSTPTNNSNPKPNP (SEQ ID NO: 5); or TNGSITVAATAPTVTPTVNATPSAA (SEQ ID NO: 31). These examples and others are discussed in WO 2010/104747, the contents of which are incorporated herein by reference.
In other embodiments an immune adjuvant is directly fused to the dendritic cell specific antibody in order to enhance the efficacy of the vaccine. In certain aspects the immune adjuvant may be a toll-like receptor (TLR) agonist. TLR agonists comprise flagellins from Salmonella enterica or Vibrio cholerae. TLR agonists may be specific for certain TLR classes (i.e., TLR2, TLR5, TLR7 or TLR9 agonists) and may be presented in any combination or as any modification. Examples of such immune adjuvants are described in U.S. application Ser. Nos. 13/208,993, 13/415,564, and in WO 2012/021834, the contents of all of which are incorporated herein by reference. US Patent Publications 2012/0039,916 and 2012/023,102 are incorporated by reference to the extent they disclose different TLR agonists.
In some embodiments, the compositions and fusion proteins comprising dendritic cell antibodies and HPV antigens are used to treat HPV related diseases or an HPV related pathology. In some embodiments, an HPV related disease is dysplasia, benign neoplasia, pre-malignant neoplasia or cancer (malignant neoplasia). In some embodiments, the tissue or organ affected by dysplasia, benign neoplasia, pre-malignant neoplasia or cancer is the cervix, vulva, vagina, penis, anus, oropharynx, head and neck, throat or lung. In some specific embodiments the HPV related diseases or an HPV related pathology is cervical intraepithelial neoplasia (CIN), vulvar intraepithelial neoplasia (VIN), penile intraepithelial neoplasia (PIN), and/or anal intraepithelial neoplasia (AIN). In still other embodiments, the compositions and fusion proteins comprising dendritic cell antibodies and HPV antigens are used to treat HPV related Common warts, Plantar warts, Flat warts, Anogenital warts, Anal lesions, Genital cancers, Epidermodysplasia verruciformis, Focal epithelial hyperplasia (oral), Oral papillomas, Oropharyngeal cancer, Verrucous cyst or Laryngeal papillomatosis.
As discussed above, the compositions and methods of using these compositions can treat a subject (e.g., prevent an HPV infection or HPV related disease or evoke a robust or potentiate an immune response to HPV or HPV related disease) having, suspected of having, or at risk of developing an infection or related disease, related to HPV.
As used herein the phrase “immune response” or its equivalent “immunological response” refers to a humoral (antibody mediated), cellular (mediated by antigen-specific T cells or their secretion products) or both humoral and cellular response directed against a protein, peptide, or polypeptide of the invention in a recipient patient. Treatment or therapy can be an active immune response induced by administration of immunogen or a passive therapy effected by administration of a fusion protein composition, immunogenic composition or protein composition comprising an antibody/antigen fusion protein, antibody/antigen fusion protein containing material, or primed T-cells.
For purposes of this specification and the accompanying claims the terms “epitope” and “antigenic determinant” are used interchangeably to refer to a site on an antigen to which B and/or T cells respond or recognize. B-cell epitopes can be formed both from contiguous amino acids or noncontiguous amino acids juxtaposed by tertiary folding of a protein. Epitopes formed from contiguous amino acids are typically retained on exposure to denaturing solvents whereas epitopes formed by tertiary folding are typically lost on treatment with denaturing solvents. An epitope typically includes at least 3, and more usually, at least 5 or 8-10 amino acids in a unique spatial conformation. Methods of determining spatial conformation of epitopes include those methods described in Epitope Mapping Protocols (1996). T cells recognize continuous epitopes of about nine amino acids for CD8 cells or about 13-15 amino acids for CD4 cells. T cells that recognize the epitope can be identified by in vitro assays that measure antigen-dependent proliferation, as determined by 3H-thymidine incorporation by primed T cells in response to an epitope (Burke et al., 1994), by antigen-dependent killing (cytotoxic T lymphocyte assay, Tigges et al., 1996, incorporated by reference) or by cytokine secretion.
The presence of a cell-mediated immunological response can be determined by proliferation assays (CD4 (+) T cells) or CTL (cytotoxic T lymphocyte) assays. The relative contributions of humoral and cellular responses to the protective or therapeutic effect of an immunogen can be distinguished by separately isolating IgG and T-cells from an immunized syngeneic animal and measuring protective or therapeutic effect in a second subject. As used herein and in the claims, the terms “antibody” or “immunoglobulin” are used interchangeably.
Optionally, an antibody or preferably an immunological portion of an antibody, can be chemically conjugated to, or expressed as, a fusion protein with other proteins. For purposes of this specification and the accompanying claims, all such fused proteins are included in the definition of antibodies or an immunological portion of an antibody.
In one embodiment a method includes treatment for a disease or condition caused by or suspected of being caused by an HPV pathogen. In certain aspects embodiments include methods of treatment of HPV infection, such as an infection acquired from an HPV positive individual. In some embodiments, the treatment is administered in the presence of HPV antigens. Furthermore, in some examples, treatment comprises administration of other agents commonly used against viral infection.
The therapeutic compositions are administered in a manner compatible with the dosage formulation, and in such amount as will be therapeutically effective. The quantity to be administered depends on the subject to be treated. Precise amounts of active ingredient required to be administered depend on the judgment of the practitioner. Suitable regimes for initial administration and boosters are also variable, but are typified by an initial administration followed by subsequent administrations.
The manner of application may be varied widely. Any of the conventional methods for administration of a polypeptide therapeutic are applicable. These are believed to include oral application on a solid physiologically acceptable base or in a physiologically acceptable dispersion, parenterally, by injection and the like. The dosage of the composition will depend on the route of administration and will vary according to the size and health of the subject.
In certain instances, it will be desirable to have multiple administrations of the composition, e.g., 2, 3, 4, 5, 6 or more administrations. The administrations can be at 1, 2, 3, 4, 5, 6, 7, 8, to 5, 6, 7, 8, 9, 10, 11, 12 twelve week intervals, including all ranges there between.
Combination Therapy
The compositions and related methods, particularly administration of an antibody that binds DC receptor and delivers an HPV antigen or antigens or peptide or peptides to a patient/subject, may also be used in combination with the administration of traditional anti-viral therapies or anti-cancer therapies or drugs. These include, but are not limited to, entry inhibitors, CCR5 receptor antagonists, nucleoside reverse transcriptase inhibitors, nucleotide reverse transcriptase inhibitors, non-nucleoside reverse transcriptase inhibitors, protease inhibitors, integrase inhibitors and maturation inhibitors. Anti-cancer therapies include but are not limited to chemotherapy, radiotherapy or radiation therapy.
The compositions and related methods, particularly administration of an antibody that binds DC receptor and delivers an HPV antigen or antigens or peptide or peptides to a patient/subject, may also be used in combination with the administration of one or more anti-cancer drugs that include but are not limited to Abiraterone Acetate, Abitrexate (Methotrexate), Abraxane (Paclitaxel Albumin-stabilized Nanoparticle Formulation), ABVD, ABVE, ABVE-PC, AC, AC-T, Adcetris (Brentuximab Vedotin), ADE, Ado-Trastuzumab Emtansine, Adriamycin (Doxorubicin Hydrochloride), Adrucil (Fluorouracil), Afatinib Dimaleate, Afinitor (Everolimus), Aldara (Imiquimod), Aldesleukin, Alemtuzumab, Alimta (Pemetrexed Disodium), Aloxi (Palonosetron Hydrochloride), Ambochlorin (Chlorambucil), Amboclorin (Chlorambucil), Aminolevulinic Acid, Anastrozole, Aprepitant, Aredia (Pamidronate Disodium), Arimidex (Anastrozole), Aromasin (Exemestane), Arranon (Nelarabine), Arsenic Trioxide, Arzerra (Ofatumumab), Asparaginase Erwinia chrysanthemi, Avastin (Bevacizumab), Axitinib, Azacitidine, BEACOPP, Bendamustine Hydrochloride, BEP, Bevacizumab, Bexarotene, Bexxar (Tositumomab and I 131 Iodine Tositumomab), Bleomycin, Bortezomib, Bosulif (Bosutinib), Bosutinib, Brentuximab Vedotin, Cabazitaxel, Cabozantinib-S-Malate, CAF, Campath (Alemtuzumab), Camptosar (Irinotecan Hydrochloride), Capecitabine, CAPOX, Carboplatin, CARBOPLATIN-TAXOL, Carfilzomib, CeeNU (Lomustine), Cerubidine (Daunorubicin Hydrochloride), Cervarix (Recombinant HPV Bivalent Vaccine comprising recombinant L1 protein of HPV types 16 and 18), Cetuximab, Chlorambucil, CHLORAMBUCIL-PREDNISONE, CHOP, Cisplatin, Clafen (Cyclophosphamide), Clofarabine, Clofarex (Clofarabine), Clolar (Clofarabine), CMF, Cometriq (Cabozantinib-S-Malate), COPP, COPP-ABV, Cosmegen (Dactinomycin), Crizotinib, CVP, Cyclophosphamide, Cyfos (Ifosfamide), Cytarabine, Cytarabine, Liposomal, Cytosar-U (Cytarabine), Cytoxan (Cyclophosphamide), Dabrafenib, Dacarbazine, Dacogen (Decitabine), Dactinomycin, Dasatinib, Daunorubicin Hydrochloride, Decitabine, Degarelix, Denileukin Diftitox, Denosumab, DepoCyt (Liposomal Cytarabine), DepoFoam (Liposomal Cytarabine), Dexrazoxane Hydrochloride, Docetaxel, Doxil (Doxorubicin Hydrochloride Liposome), Doxorubicin Hydrochloride, Doxorubicin Hydrochloride Liposome, Dox-SL (Doxorubicin Hydrochloride Liposome), DTIC-Dome (Dacarbazine), Efudex (Fluorouracil), Elitek (Rasburicase), Ellence (Epirubicin Hydrochloride), Eloxatin (Oxaliplatin), Eltrombopag Olamine, Emend (Aprepitant), Enzalutamide, Epirubicin Hydrochloride, EPOCH, Erbitux (Cetuximab), Eribulin Mesylate, Erivedge (Vismodegib), Erlotinib Hydrochloride, Erwinaze (Asparaginase Erwinia chrysanthemi), Etopophos (Etoposide Phosphate), Etoposide, Etoposide Phosphate, Evacet (Doxorubicin Hydrochloride Liposome), Everolimus, Evista (Raloxifene Hydrochloride), Exemestane, Fareston (Toremifene), Faslodex (Fulvestrant), FEC, Femara (Letrozole), Filgrastim, Fludara (Fludarabine Phosphate), Fludarabine Phosphate, Fluoroplex (Fluorouracil), Fluorouracil, Folex (Methotrexate), Folex PFS (Methotrexate), FOLFIRI, FOLFIRI-BEVACIZUMAB, FOLFIRI-CETUXIMAB, FOLFIRINOX, FOLFOX, Folotyn (Pralatrexate), FU-LV, Fulvestrant, Gardasil (Recombinant HPV Quadrivalent Vaccine comprising recombinant L1 protein of HPV types 6, 11, 16, and 18), Gazyva (Obinutuzumab), Gefitinib, Gemcitabine Hydrochloride, GEMCITAB INE-CISPLATIN, GEMCITAB INE-OXALIPLATIN, Gemtuzumab Ozogamicin, Gemzar (Gemcitabine Hydrochloride), Gilotrif (Afatinib Dimaleate), Gleevec (Imatinib Mesylate), Glucarpidase, Goserelin Acetate, Halaven (Eribulin Mesylate), Herceptin (Trastuzumab), HPV Bivalent Vaccine, Recombinant, HPV Quadrivalent Vaccine, Recombinant, Hycamtin (Topotecan Hydrochloride), Ibritumomab Tiuxetan, Ibrutinib, ICE, Iclusig (Ponatinib Hydrochloride), Ifex (Ifosfamide), Ifosfamide, Ifosfamidum (Ifosfamide), Imatinib Mesylate, Imbruvica (Ibrutinib), Imiquimod, Inlyta (Axitinib), Intron A (Recombinant Interferon Alfa-2b), Iodine 131 Tositumomab and Tositumomab, Ipilimumab, Iressa (Gefitinib), Irinotecan Hydrochloride, Istodax (Romidepsin), Ixabepilone, Ixempra (Ixabepilone), Jakafi (Ruxolitinib Phosphate), Jevtana (Cabazitaxel), Kadcyla (Ado-Trastuzumab Emtansine), Keoxifene (Raloxifene Hydrochloride), Kepivance (Palifermin), Kyprolis (Carfilzomib), Lapatinib Ditosylate, Lenalidomide, Letrozole, Leucovorin Calcium, Leukeran (Chlorambucil), Leuprolide Acetate, Levulan (Aminolevulinic Acid), Linfolizin (Chlorambucil), LipoDox (Doxorubicin Hydrochloride Liposome), Liposomal Cytarabine, Lomustine, Lupron (Leuprolide Acetate), Lupron Depot (Leuprolide Acetate), Lupron Depot-Ped (Leuprolide Acetate), Lupron Depot-3 Month (Leuprolide Acetate), Lupron Depot-4 Month (Leuprolide Acetate), Marqibo (Vincristine Sulfate Liposome), Matulane (Procarbazine Hydrochloride), Mechlorethamine Hydrochloride, Megace (Megestrol Acetate), Megestrol Acetate, Mekinist (Trametinib), Mercaptopurine, Mesna, Mesnex (Mesna), Methazolastone (Temozolomide), Methotrexate, Methotrexate LPF (Methotrexate), Mexate (Methotrexate), Mexate-AQ (Methotrexate), Mitomycin C, Mitozytrex (Mitomycin C), MOPP, Mozobil (Plerixafor), Mustargen (Mechlorethamine Hydrochloride), Mutamycin (Mitomycin C), Mylosar (Azacitidine), Mylotarg (Gemtuzumab Ozogamicin), Nanoparticle Paclitaxel (Paclitaxel Albumin-stabilized Nanoparticle Formulation), Navelbine (Vinorelbine Tartrate), Nelarabine, Neosar (Cyclophosphamide), Neupogen (Filgrastim), Nexavar (Sorafenib Tosylate), Nilotinib, Nolvadex (Tamoxifen Citrate), Nplate (Romiplostim), Obinutuzumab, Ofatumumab, Omacetaxine Mepesuccinate, Oncaspar (Pegaspargase), Ontak (Denileukin Diftitox), OEPA, OPPA, Oxaliplatin, Paclitaxel, Paclitaxel Albumin-stabilized Nanoparticle Formulation, Palifermin, Palonosetron Hydrochloride, Pamidronate Disodium, Panitumumab, Paraplat (Carboplatin), Paraplatin (Carboplatin), Pazopanib Hydrochloride, Pegaspargase, Peginterferon Alfa-2b, PEG-Intron (Peginterferon Alfa-2b), Pemetrexed Disodium, Perjeta (Pertuzumab), Pertuzumab, Platinol (Cisplatin), Platinol-AQ (Cisplatin), Plerixafor, Pomalidomide, Pomalyst (Pomalidomide), Ponatinib Hydrochloride, Pralatrexate, Prednisone, Procarbazine Hydrochloride, Proleukin (Aldesleukin), Prolia (Denosumab), Promacta (Eltrombopag Olamine), Provenge (Sipuleucel-T), Purinethol (Mercaptopurine), Radium 223 Dichloride, Raloxifene Hydrochloride, Rasburicase, R—CHOP, R—CVP, Recombinant HPV Bivalent Vaccine, Recombinant HPV Quadrivalent Vaccine, Recombinant Interferon Alfa-2b, Regorafenib, Revlimid (Lenalidomide), Rheumatrex (Methotrexate), Rituxan (Rituximab), Rituximab, Romidepsin, Romiplostim, Rubidomycin (Daunorubicin Hydrochloride), Ruxolitinib Phosphate, Sclerosol Intrapleural Aerosol (Talc), Sipuleucel-T, Sorafenib Tosylate, Sprycel (Dasatinib), STANFORD V, Sterile Talc Powder (Talc), Steritalc (Talc), Stivarga (Regorafenib), Sunitinib Malate, Sutent (Sunitinib Malate), Sylatron (Peginterferon Alfa-2b), Synovir (Thalidomide), Synribo (Omacetaxine Mepesuccinate), TAC, Tafinlar (Dabrafenib), Talc, Tamoxifen Citrate, Tarabine PFS (Cytarabine), Tarceva (Erlotinib Hydrochloride), Targretin (Bexarotene), Tasigna (Nilotinib), Taxol (Paclitaxel), Taxotere (Docetaxel), Temodar (Temozolomide), Temozolomide, Temsirolimus, Thalidomide, Thalomid (Thalidomide), Toposar (Etoposide), Topotecan Hydrochloride, Toremifene, Torisel (Temsirolimus), Tositumomab and I 131 Iodine Tositumomab, Totect (Dexrazoxane Hydrochloride), Trametinib, Trastuzumab, Treanda (Bendamustine Hydrochloride), Trisenox (Arsenic Trioxide), Tykerb (Lapatinib Ditosylate), Vandetanib, VAMP, Vectibix (Panitumumab), VeIP, Velban (Vinblastine Sulfate), Velcade (Bortezomib), Velsar (Vinblastine Sulfate), Vemurafenib, VePesid (Etoposide), Viadur (Leuprolide Acetate), Vidaza (Azacitidine), Vinblastine Sulfate, Vincasar PFS (Vincristine Sulfate), Vincristine Sulfate, Vincristine Sulfate Liposome, Vinorelbine Tartrate, Vismodegib, Voraxaze (Glucarpidase), Vorinostat, Votrient (Pazopanib Hydrochloride), Wellcovorin (Leucovorin Calcium), Xalkori (Crizotinib), Xeloda (Capecitabine), XELOX, Xgeva (Denosumab), Xofigo (Radium 223 Dichloride), Xtandi (Enzalutamide), Yervoy (Ipilimumab), Zaltrap (Ziv-Aflibercept), Zelboraf (Vemurafenib), Zevalin (Ibritumomab Tiuxetan), Zinecard (Dexrazoxane Hydrochloride), Ziv-Aflibercept, Zoladex (Goserelin Acetate), Zoledronic Acid, Zolinza (Vorinostat), Zometa (Zoledronic Acid) and Zytiga (Abiraterone Acetate).
The compositions and related methods, particularly administration of an antibody that binds DC receptor and delivers an HPV antigen or antigens or peptide or peptides to a patient/subject, may also be used in combination with the administration of radiation therapy that includes but is not limited to X-rays, gamma rays, and charged particles. The radiation may be delivered by a machine outside the body (external-beam radiation therapy), or it may come from radioactive material placed in the body near cancer cells (internal radiation therapy or brachytherapy). Internal radiation therapy may be systemic (e.g. radioactive iodine). External-beam radiation therapy may include, but is not limited to, 3-dimensional conformal radiation therapy (3D-CRT), Intensity-modulated radiation therapy (IMRT), Image-guided radiation therapy (IGRT), Tomotherapy, Stereotactic radiosurgery (SRS), Stereotactic body radiation therapy (SBRT), Proton therapy or other charged particle beams (e.g., electron beams). Internal radiation therapy or brachytherapy may comprise interstitial brachytherapy which uses a radiation source placed within tumor tissue and may be used to deliver a dose higher than external beam radiation while causing less damage to normal tissue. Brachytherapy may be given as a low-dose rate or high-dose rate treatment. In additional embodiments, brachytherapy may be permanent or temporary. Radiation therapy may comprise systemic radiation therapy. Systemic radiation therapy may comprise a swallowed or injected radioactive substance, that includes, but is not limited to any single, multiple or combination dose of Radioactive iodine (131I), ibritumomab tiuxetan (Zevalin®), 131 tositumomab (Bexxar®), samarium-153-lexidronam (Quadramet®) and strontium-89 chloride (Metastron®) or any monoclonal bound to a radioactive substance. The dose of radiation according to different embodiments may be tailored to the specific disease, condition or cancered being treated. In some embodiments, the single or total dose may be 1-10 gray(Gy), 10-20 Gy, 20-40 Gy, 40-60 Gy, or 60-80 Gy, or any value or rage derivable therein. In some embodiments, radiation therapy or dose may be fractionated. In one embodiment, a total dose may be fractionated per day or per week. In certain embodiments the daily fractionated dose may be 1.8-2 Gy. It is contemplated that a total dose may be fractionated into daily or weekly doses in the range of 0.1 Gy to 10 Gy.
In one aspect, it is contemplated that a therapy is used in conjunction with antiviral or anti-cancer therapies. Alternatively, the therapy may precede or follow the other agent treatment by intervals ranging from minutes to weeks. In embodiments where the other agents and/or a proteins or polynucleotides are administered separately, one would generally ensure that a significant period of time did not expire between the time of each delivery, such that the therapeutic composition would still be able to exert an advantageously combined effect on the subject. In such instances, it is contemplated that one may administer both modalities within about 12-24 h of each other and, more preferably, within about 6-12 h of each other. In some situations, it may be desirable to extend the time period for administration significantly, however, where several days (2, 3, 4, 5, 6 or 7) to several weeks (1, 2, 3, 4, 5, 6, 7 or 8) lapse between the respective administrations.
In yet another aspect, a vaccine may be administered as part of a prime/boost strategy. A priming vaccine dose can be administered using a DC specific antibody fused to an HPV antigen in any of the embodiments described herein. A vaccine boost can be administered through the use of a second vaccine, either of the same type or from a different type of vaccine. Examples of a separate HPV vaccine include Gardasil™ (recombinant HPV quadrivalent vaccine comprising recombinant L1 protein of HPV types 6, 11, 16, and 18) or Cervarix™ (recombinant HPV bivalent vaccine comprising recombinant L1 protein of HPV types 16 and 18). Additional examples of such different vaccines include naked DNA vaccines or a recombinant viruses. The second vaccine may comprise additional HPV antigens apart from the E6 or E7 antigens that may be used in the first vaccine. It is also contemplated that the second vaccine may comprise an HPV protein such as an E6 or E7 protein plus an adjuvant either directly linked or administered independently.
Various combinations of therapy may be employed, for example antiviral or anti-cancer therapy is “A” and an antibody vaccine that comprises an antibody that binds a DC receptor and delivers an HPV antigen or a peptide or consensus peptide thereof is “B”:
Administration of the antibody compositions to a patient/subject will follow general protocols for the administration of such compounds, taking into account the toxicity, if any, of the composition. It is expected that the treatment cycles would be repeated as necessary. It is also contemplated that various standard therapies, such as hydration, may be applied in combination with the described therapy.
General Pharmaceutical Compositions
In some embodiments, pharmaceutical compositions are administered to a subject. Different aspects may involve administering an effective amount of a composition to a subject. In some embodiments, an antibody that binds DC receptor and delivers an HPV antigen or a peptide or consensus peptide thereof may be administered to the patient to protect against or treat infection by one or more HPV types or protect or treat against one or more HPV related diseases such as cancer. Alternatively, an expression vector encoding one or more such antibodies or polypeptides or peptides may be given to a patient as a preventative treatment. Additionally, such compositions can be administered in combination with an antibiotic, antiviral or anticancer agent. Such compositions will generally be dissolved or dispersed in a pharmaceutically acceptable carrier or aqueous medium.
The phrases “pharmaceutically acceptable” or “pharmacologically acceptable” refer to molecular entities and compositions that do not produce an adverse, allergic, or other untoward reaction when administered to an animal or human. As used herein, “pharmaceutically acceptable carrier” includes any and all solvents, dispersion media, coatings, antibacterial and antifungal agents, isotonic and absorption delaying agents, and the like. The use of such media and agents for pharmaceutical active substances is well known in the art. Except insofar as any conventional media or agent is incompatible with the active ingredients, its use in immunogenic and therapeutic compositions is contemplated. Supplementary active ingredients, such as other anti-infective agents and vaccines, can also be incorporated into the compositions.
The active compounds can be formulated for parenteral administration, e.g., formulated for injection via the mucosal, intravenous, intramuscular, sub-cutaneous, intratumoral or even intraperitoneal routes. Typically, such compositions can be prepared as either liquid solutions or suspensions; solid forms suitable for use to prepare solutions or suspensions upon the addition of a liquid prior to injection can also be prepared; and, the preparations can also be emulsified.
The pharmaceutical forms suitable for injectable use include sterile aqueous solutions or dispersions; formulations including sesame oil, peanut oil, or aqueous propylene glycol; and sterile powders for the extemporaneous preparation of sterile injectable solutions or dispersions. In all cases the form must be sterile and must be fluid to the extent that it may be easily injected. It also should be stable under the conditions of manufacture and storage and must be preserved against the contaminating action of microorganisms, such as bacteria and fungi.
The proteinaceous compositions may be formulated into a neutral or salt form. Pharmaceutically acceptable salts, include the acid addition salts (formed with the free amino groups of the protein) and which are formed with inorganic acids such as, for example, hydrochloric or phosphoric acids, or such organic acids as acetic, oxalic, tartaric, mandelic, and the like. Salts formed with the free carboxyl groups can also be derived from inorganic bases such as, for example, sodium, potassium, ammonium, calcium, or ferric hydroxides, and such organic bases as isopropylamine, trimethylamine, histidine, procaine and the like.
A pharmaceutical composition can include a solvent or dispersion medium containing, for example, water, ethanol, polyol (for example, glycerol, propylene glycol, and liquid polyethylene glycol, and the like), suitable mixtures thereof, and vegetable oils. The proper fluidity can be maintained, for example, by the use of a coating, such as lecithin, by the maintenance of the required particle size in the case of dispersion, and by the use of surfactants. The prevention of the action of microorganisms can be brought about by various antibacterial and antifungal agents, for example, parabens, chlorobutanol, phenol, sorbic acid, thimerosal, and the like. In many cases, it will be preferable to include isotonic agents, for example, sugars or sodium chloride. Prolonged absorption of the injectable compositions can be brought about by the use in the compositions of agents delaying absorption, for example, aluminum monostearate and gelatin.
Sterile injectable solutions are prepared by incorporating the active compounds in the required amount in the appropriate solvent with various of the other ingredients enumerated above, as required, followed by filtered sterilization or an equivalent procedure. Generally, dispersions are prepared by incorporating the various sterilized active ingredients into a sterile vehicle which contains the basic dispersion medium and the required other ingredients from those enumerated above. In the case of sterile powders for the preparation of sterile injectable solutions, the preferred methods of preparation are vacuum-drying and freeze-drying techniques, which yield a powder of the active ingredient, plus any additional desired ingredient from a previously sterile-filtered solution thereof.
Administration of the compositions will typically be via any common route. This includes, but is not limited to oral, nasal, or buccal administration. Alternatively, administration may be by orthotopic, intradermal, subcutaneous, intramuscular, intraperitoneal, intratumoral, intranasal, or intravenous injection. In certain embodiments, a vaccine composition may be inhaled (e.g., U.S. Pat. No. 6,651,655, which is specifically incorporated by reference). Such compositions would normally be administered as pharmaceutically acceptable compositions that include physiologically acceptable carriers, buffers or other excipients.
An effective amount of therapeutic or prophylactic composition is determined based on the intended goal. The term “unit dose” or “dosage” refers to physically discrete units suitable for use in a subject, each unit containing a predetermined quantity of the composition calculated to produce the desired responses discussed above in association with its administration, i.e., the appropriate route and regimen. The quantity to be administered, both according to number of treatments and unit dose, depends on the protection desired.
Precise amounts of the composition also depend on the judgment of the practitioner and are peculiar to each individual. Factors affecting dose include physical and clinical state of the subject, route of administration, intended goal of treatment (alleviation of symptoms versus cure), and potency, stability, and toxicity of the particular composition.
Upon formulation, solutions will be administered in a manner compatible with the dosage formulation and in such amount as is therapeutically or prophylactically effective. The formulations are easily administered in a variety of dosage forms, such as the type of injectable solutions described above.
The following examples are included to demonstrate preferred embodiments of the invention. It should be appreciated by those of skill in the art that the techniques disclosed in the examples which follow represent techniques discovered by the inventor to function well in the practice of the invention, and thus can be considered to constitute preferred modes for its practice. However, those of skill in the art should, in light of the present disclosure, appreciate that many changes can be made in the specific embodiments which are disclosed and still obtain a like or similar result without departing from the spirit and scope of the invention.
The inventors' scheme for the development of expression constructs for production of anti-DC receptor antibodies fused to E6 and E7 sequences from HPV 16 and 18 is given in
A transient expression vector encoding the antibody heavy chain has an in-frame Nhe I site at the C-terminus and antigen or flexible linker encoding Spe I-Not I cassettes are inserted between the vector Nhe I and Not I sites. The vector Nhe I site is lost in this ligation, but each cassette encodes a new C-terminal in-frame Nhe I site. Thus, additional antigen or linker cassettes can be added in an iterative fashion. Each new construct is transiently transfected into 293F cells with a matching light chain vector and at 72 hr secreted vaccine is isolated by protein A affinity and analyzed by SDS.PAGE. Constructs that express well are the preferred vectors for adding new cassettes (
The inventors have engineered expression constructs with HPV16 E6 and E7 and HPV18 E6 and E7 sequences fused to antibody heavy chain C-terminii. Constructs with HPV16 or HPV18 E6 or HPV16 or HPV18 E7 sequences fused directly to an anti-dendritic cell receptor antibody heavy chain C-terminal codon failed to be secrete any detectable vaccine when co-transfected into 293F cells with a matching light chain expression vector (not shown). However, similar vectors incorporating a flexible linker sequence (Flex v1), secreted the vaccines (
Anti-CD40-HPV16.E6/7 can efficiently bind to DCs in peripheral blood of healthy donors. Peripheral blood mononuclear cells (PBMCs) were acquired from the blood of healthy individuals. PBMCs were incubated for 15 min on ice in the presence of different amounts of anti-CD40-HPV16.E6/7 or control IgG4-HPV16.E6/7 proteins. Cells were washed vigorously and then stained with anti-E6/7 antibodies to detect cell surface bound proteins. As shown in
Anti-CD40-HPV16.E6/7 can efficiently activate E6/7-specific memory CD4+ and CD8+ T cells from HPV-related cancer patients. Evaluated next was the in vitro immunogenicity of anti-CD40-HPV16.E6/7 using PBMCs from HPV-positive head and neck cancer patients. Patient PBMCs were loaded with recombinant HPV16.E6/7 proteins, anti-CD40-HPV16.E6/7, or peptide pool of HPV16.E6/7 proteins. In this experiment, the same molar concentration of E6/7 in each protein was applied to compare the levels of E6/7-specific IFNg-expressing CD4+ and CD8+ T cell responses. After 7 days in vitro culture, PBMCs were restimulated for 5 h with peptide pool of E6/7 in the presence of brefeldin A and then cells were stained for IFNg expression.
Anti-CD40-HPV16.E6/7 can prime E6/7-specific CD4+ and CD8+ T cell responses in vivo. To test the in vivo immunogenicity of anti-CD40-HPV16.E6/7 vaccine, human CD40 transgenic mice were used. Five animals were immunized s.c. with 30 ug anti-CD40-HPV16.E6/7 plus poly IC on day 0 and then boosted twice with the same vaccine. On day 7 after the second boosting, CD4+ and CD8+ T cells were purified from spleens and then restimulated with oen of HPV16.E6/7 peptide clusters 1-5, none, a peptide pool of prostate specific antigen (PSA), or a HPV16.E6/7 peptide pool.
Anti-CD40-HPV16.E6/7 can suppress TC-1 tumor progression in the human CD40 transgenic mice. Efficacy of anti-CD40-HPV16.E6/7 plus poly IC vaccine was tested in TC-1 challenged human CD40 transgenic mice. Two groups of animals (Human CD40+ and human CD40− mice, 5 mice per group) were challenged on day 0 with TC-1 tumor cell line subcutaneously. On days 6 and 12, animals were immunized with anti-CD40-HPV.E6/7 plus poly IC. Tumor progression was assessed and presented in
The effects of poly IC, poly IC plus montanide, GM-CSF plus montanide, and montanide alone on the immunogenicity of anti-CD40-HPV.E6/7 vaccine was tested in the human CD40 transgenic mice. Four animals in each group were immunized s.c. with 30 ug anti-CD40-HPV.E6/7 alone or anti-CD40-HPV16.E6/7 with indicated adjuvants (
Sequences below are based on the humanized 12E12 anti-human CD40 VK2 VH2 antibody-protein sequences are the expected mature secreted protein sequence and the DNA sequences include the initiator ATG and the leader peptide region. Alternately, the HPV18 sequences can be grafted onto the C-terminus of the VK2 chain and a broader spectrum vaccine produced by combining this with the HPV16 sequences on the VH2 H chain.
ATGAGGGTCCCCGCTCAGCTCCTGGGGCTCCTGCTGCTCTGGCTCCCAGGCGCGC
TISVTPTNNSTPTNNSNPKPNPAS
AS
ASSSVSPTTSVHPTPTSVPPTPTKS
SPAS
ATGGGTTGGAGCCTCATCTTGCTCTTCCTTGTCGCTGTTGCTACGCGTGTCCACTC
TISVTPTNNSTPTNNSNPKPNPAS
AS
ASSSVSPTTSVHPTPTSVPPTPTK
SSPAS
ATGGGTTGGAGCCTCATCTTGCTCTTCCTTGTCGCTGTTGCTACGCGTGTCCACTC
Below is an example of a TLR2 ligand (tri-acylated cohesin, expressed in E. coli) where the C residue in the D1 leader domain is lipidated, this can be non-covalently attached to anti-CD40-HPV vaccine when the anti-CD40 has, e.g., a Dockerin domain fused to either the C-terminus or the L chain or the H chain C-terminus distal to the HPV E6/7 sequences.
Below is an example of an anti-CD40 L chain bearing a preferred TLR5L Flagellin domain (shown underlined). This would be co-transfected with the matching H chain bearing HPV E6/7 antigen at the C-terminus.
QASRNANDGISIAQTTEGALNEINNNLQRVRELAVQSANSTNSQSDLDSI
QAEITQRLNEIDRVSGQTQFNGVKVLAQDNTLTIQVGANDGETIDIDLKQ
INSQTLGLDSLNVQASQPELAEAAAKTTENPLQKIDAALAQVDALRSDLG
AVQNRFNSAITNLGNTVNNLSEARSRIEDSDYATEVSNMSRAQILQAS
Below is an example of analogous HPV 18 E6/7 sequences fused to DC-targeting antibody H chain (in this case anti-Langerin). This can be fused instead to the H chain of the preferred antiCD40 antibody in place of the HPV 16 sequences, or fused downstream of the HPV 16 sequences, or fused to the anti-CD40 L chain—in each case making a vaccine bearing both HPV 16 and HPV 18 sequences.
AS
orASSSVSPTTSVHPTPTS
VPPTPTKSSPAS
CD40HVac plus poly IC induces E6/7-specific CD8+ CTLs in human CD40 transgenic B6 (hCD40Tg) mice. hCD40Tg and WT animals (5 mice/group) were immunized subcutaneously (SC) with 30 μg CD40HVac plus 50 μg poly IC in PBS (100 μl) and boosted twice two weeks apart. The amounts of CD40HVac and poly IC were predetermined in separate experiments. Seven days after the second boosting, IFNγ ELISPOT was performed using purified CD8+ T cells from spleens (
CD40HVac plus poly IC can mount therapeutic immunity in hCD40Tg animals. hCD40Tg mice (10 mice per group) were SC challenged with HPV E6/7-expressing TC-1 tumor cells (5×104). The inventors confirmed that animals harbor palpable tumors on day 6 after TC-1 challenge. Animals were then immunized SC, intramuscularly (IM), or intraperitoneally (IP) with 30 μg CD40HVac plus 50 μg poly IC on days 6, 12, and 24. A control group was kept without immunization.
CD8+ CTL infiltration into tumors is critical for tumor regression. Human CD40 transgenic (hCD40Tg) mice were SC challenged with high numbers of TC-1 tumor cells (2×105 cells). Animals were then immunized with 30 μg CD40HVac plus 50 μg poly IC on days 6 and 12. Without vaccination, all animals died within 25 days after the tumor challenge. On day 60, the percentages of H2-Db (RAHYNIVTF) tetramer+CD8+ T cells in tumors and blood were assessed (
CD40HVac made with anti-CD40 (12E12 clone) is more efficient than CD40HVac made with anti-CD40 (12B4 clone) at eliciting HPV16.E6/7-specific CD8+ T cell responses. The inventors compared recombinant fusion proteins made with three different clones of anti-CD40 mAbs (12E12 and 12B4) for their ability to prime HPV16.E6/7-specific CD8+ T cell responses. The inventors used poly IC as an adjuvant. hCD40Tg animals received three doses of recombinant fusion proteins (30 μg/dose) plus poly IC (50 μg/dose) via s.c. Seven days after the third immunization, the percentage of E7-specific CD8+ T cells in the blood were determined by tetramer staining. As shown in left panel of
All of the methods disclosed and claimed herein can be made and executed without undue experimentation in light of the present disclosure. While the compositions and methods of this invention have been described in terms of preferred embodiments, it will be apparent to those of skill in the art that variations may be applied to the methods and in the steps or in the sequence of steps of the method described herein without departing from the concept, spirit and scope of the invention. More specifically, it will be apparent that certain agents which are both chemically and physiologically related may be substituted for the agents described herein while the same or similar results would be achieved. All such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the spirit, scope and concept of the invention as defined by the appended claims.
The following references, to the extent that they provide exemplary procedural or other details supplementary to those set forth herein, are specifically incorporated herein by reference.
This application is a continuation of U.S. patent application Ser. No. 15/111,357, filed Jul. 13, 2016, which is a national phase application under 35 U.S.C. § 371 of International Application No. PCT/US2015/011236, filed Jan. 13, 2015, which claims the benefit of priority to U.S. Provisional Patent Application Ser. No. 61/926,821, filed Jan. 13, 2014, and U.S. Provisional Patent Application Ser. No. 62/002,718, filed May 23, 2014, the enture contencts of each of which are hereby incorporated by reference in their entirety.
The invention was made with government support under Grant No. U19 AI057234 awarded by the National Institutes of Health and the National Institute of Allergy and Infectious Diseases. The government has certain rights in the invention.
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| Number | Date | Country | |
|---|---|---|---|
| 20190314481 A1 | Oct 2019 | US |
| Number | Date | Country | |
|---|---|---|---|
| 61926821 | Jan 2014 | US | |
| 62002718 | May 2014 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 15111357 | US | |
| Child | 16397214 | US |
