Patent Application
20160041174
It is desirable to improve cancer detection, prognostic prediction, monitoring, and therapeutic decisions. For example, when cancer is identified at the earliest stages, the probability of cure is very high and therefore diagnostic screening tests that can detect these early stages are crucial.
One example in which early detection can be beneficial is prostate cancer (PCA). PCA is a leading cause of male cancer-related death, second only to lung cancer (Abate-Shen and Shen, Genes Dev 14:2410 (2000); Ruijter et al., Endocr Rev, 20:22 (1999)). Prostate cancer is typically diagnosed with a digital rectal exam and/or prostate specific antigen (PSA) screening. An elevated serum PSA level can indicate the presence of PCA. PSA is used as a marker for prostate cancer because it is secreted only by prostate cells. A healthy prostate will produce a stable amount—typically below 4 nanograms per milliliter (ng/ml), or a PSA reading of “4” or less—whereas cancer cells produce escalating amounts that correspond with the severity of the cancer. A level between 4 and 10 ng/ml may raise a doctor's suspicion that a patient has prostate cancer, while amounts above 50 ng/ml may show that the tumor has spread elsewhere in the body.
The advent of prostate specific antigen (PSA) screening has led to earlier detection of PCA and significantly reduced PCA-associated fatalities. However, a major limitation of the serum PSA test is a lack of prostate cancer sensitivity and specificity, especially in the intermediate range of PSA detection (4-10 ng/ml). Elevated serum PSA levels are often detected in patients with non-malignant conditions such as benign prostatic hyperplasia (BPH) and prostatitis, and provide little information about the aggressiveness of the cancer detected. Coincident with increased serum PSA testing, there has been a dramatic increase in the number of prostate needle biopsies performed (Jacobsen et al., JAMA 274:1445 (1995)). This has resulted in a surge of equivocal prostate needle biopsies (Epstein and Potter J. Urol., 166:402 (2001)).
Thus, development of biomarkers to detect cancer, with improved sensitivity and specificity is advantageous.
Provided herein are methods and compositions for screening for, or characterizing, a cancer in a subject. In one embodiment, an antibody profiling panel comprising: a plurality of polypeptide probes, wherein at least one of the polypeptide probes comprises a full-length or fragment of a protein encoded by a gene listed in Tables 1, 2, 3, or 4; and each of the probes in the plurality of polypeptide probes is capable of being specifically bound by an antibody, is disclosed herein. In another embodiment, an antibody profiling panel comprising: a plurality of polypeptide probes, wherein at least one of the polypeptide probes comprises a sequence listed in Tables 1, 2, 3, or 4 or a sequence encoded by a sequence listed in Tables 1, 2, 3, or 4; and each of the probes in the plurality of polypeptide probes is capable of being specifically bound by an antibody, is disclosed herein. In one embodiment the subject is a human. In one embodiment the antibody is an autoantibody. In another embodiment the antibody is a human autoantibody. In one embodiment the presence of a human autoantibody that binds to a polypeptide probe is indicative of cancer (e.g. an expression level for one or more autoantibodies is indicative of the presence, absence, or stage of the cancer). In another embodiment the quantity or level of a human autoantibody that binds to a polypeptide probe is indicative of cancer. In one embodiment the cancer is a prostate, lung, breast or colon cancer.
In one embodiment, the polypeptide probe comprises a polypeptide sequence selected from SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, or a fragment thereof. In another embodiment, the polypeptide probe comprises a polypeptide sequence encoded by SEQ ID NO: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, or a fragment thereof.
In yet another embodiment, the polypeptide probe comprises the full-length or a fragment of a protein that is encoded by DCHS1 (SEQ ID NO: 29), Centrosomal Protein (CEP 164) (SEQ ID NO: 30), KBTBD6 (SEQ ID NO: 31), RPS19 (SEQ ID NO: 32), RPL34 (SEQ ID NO: 33), Hemk1 (SEQ ID NO: 34), eIF4G1 (SEQ ID NO: 35), BMI1 (SEQ ID NO: 36), BRD2 (SEQ ID NO: 37), RP3-323M22 (Nucleolin) (SEQ ID NO: 38), SFRS14 (SEQ ID NO: 39), LOC388789 (SEQ ID NO: 40), RNA binding motif protein 6 (genomic DNA sequence) (SEQ ID NO: 41), BRMSL1 (SEQ ID NO: 42), NKX3-1 (SEQ ID NO: 43), RPSA (SEQ ID NO: 44), Cytochrome C Oxidase 5 subunit (SEQ ID NO: 45), FAM53B (SEQ ID NO: 46), a fragment of the UTR region of chromosome 11 (Homo sapiens genomic DNA, chromosome 11 clone: CTD-2579L12, NTs 149521-151500) (SEQ ID NO: 47), MAPKKK9 (SEQ ID NO: 48) cDNA clone XR—113641.1 (Homo sapiens hypothetical LOC643783, transcript variant 2 (LOC643783), partial miscRNA) (SEQ ID NO: 49), PSA (SEQ ID NO: 50), H2aa4 (SEQ ID NO: 51). UBE2I (SEQ ID NO: 52), TIMP2 (SEQ ID NO: 53), WDR77 (SEQ ID NO: 54), a fragment of Deaminase Domain Cont 1 (Human DNA sequence from clone RP1-20N2 on chromosome 6q24 Contains the gene for a novel protein similar to yeast and bacterial cytosine deaminase, NTs 48121-50100) (SEQ ID NO: 55), Lamin A/C (SEQ ID NO: 85), Lsm3 (SEQ ID NO: 86), a fragment of cDNA clone Chromosome 19, which encompasses the nucleic acid sequence for DAZ associated protein (Homo sapiens chromosome 19 clone CTB-25B13, NTs 20521-22500) (SEQ ID NO: 87), ADAM metallopetidase domain 9 (SEQ ID NO: 88), AZGP1 (SEQ ID NO: 89), Desmocolin 3 (SEQ ID NO: 90), PERP (SEQ ID NO: 91), Chromosome 3 UTR region ropporin/RhoEGF (Homo sapiens 3 BAC RP11-783D3 (Roswell Park Cancer Institute Human BAC Library) NTs 178621-180600) (SEQ ID NO: 92), Cox5a (SEQ ID NO: 93), a Mitochondrion sequence (Homo sapiens isolate PD047 mitochondrion, NTs 4801-6780) (SEQ ID NO: 94), MYH9 (SEQ ID NO: 95), ASND1 (SEQ ID NO: 96), Cathepsin F (SEQ ID NO: 97), Mastermind-like 2 (Homo sapiens genomic DNA, chromosome 11q clone:RP11-82212, NTs 157801-159780) (SEQ ID NO: 98), CSNK2A2 (SEQ ID NO: 99), AURKAIP1 (SEQ ID NO: 100), a fragment of Chromosome 4 (Homo sapiens BAC clone RP11-327O17 from 4, NTs 107401-109380) (SEQ ID NO: 101), ARF6 (SEQ ID NO: 102), JAG1 (Human DNA sequence from clone RP1-278O22 on chromosome 20 Contains two novel genes, NTs 26161-26140) (SEQ ID NO: 103), a Mitochondrion sequence (Homo sapiens isolate PD047 mitochondrion, NTs 2041-4020) (SEQ ID NO: 104), a fragment of Chromosome 20 (Human DNA sequence from clone RP1-278O22 on chromosome 20 Contains two novel genes, NTs 25321-27300) (SEQ ID NO:105), a fragment of Chromosome 6 UTR region (Human DNA sequence from clone RP3-523G1 on chromosome 6p22.3-24.1, NTs 34621-36600) (SEQ ID NO: 106), a fragment of MAPKKK5 (SEQ ID NO: 107), RASA1 (SEQ ID NO: 108), Hsp90b (SEQ ID NO: 109), ribosomal protein S6 (RPS6) (SEQ ID NO: 110), or a fragment of Homo sapiens chromosome 3 (Homo sapiens 3 BAC RP13-616I3 (Roswell Park Cancer Institute Human BAC Library) NTs 22921-24900) (SEQ ID NO: 111).
In one embodiment, the antibody profiling panel comprises a plurality of polypeptide probes, wherein at least one of the polypeptide probes comprises a full-length or fragment of a protein listed in Table 1, or a polypeptide sequence selected from SEQ ID NO: 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, or 141, and each of said probes in said plurality of polypeptide probes is capable of being specifically bound by an antibody. In one embodiment, one or more of the polypeptide probes can comprise SEQ ID NO: 1, 2, 3, 4, 5, 6, or 7. In another embodiment, one or more of the polypeptide probes can comprise a polypeptide encoded by SEQ ID NO: 15, 16, 17, 18, 19, 20, or 21. In one embodiment, the antibody profiling panel can further comprise a full-length or fragment of a protein listed in Tables 2, 3, or 4. In another embodiment, the antibody profiling panel, one of the polypeptide probes can comprise SEQ ID NO: 8, 9, 10, 11, 12, 13, or 14. In another embodiment, one or more of the polypeptide probes can comprise a polypeptide encoded by SEQ ID NO: 22, 23, 24, 25, 26, 27, or 28. In one embodiment the antibody is an autoantibody. In another embodiment the antibody is a human autoantibody. In one embodiment the presence of a human autoantibody that binds to a polypeptide probe is indicative of cancer (e.g. an expression level for one or more autoantibodies is indicative of the presence, absence, or stage of the cancer). In another embodiment the quantity or level of a human autoantibody that binds to a polypeptide probe is indicative of cancer. In one embodiment the cancer is a prostate, lung, breast or colon cancer.
In one embodiment, the plurality of probes comprise a polypeptide probe comprising a full-length or fragment of a protein encoded by CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, Deaminase Domain, FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789. In one embodiment, the polypeptide probe comprises SEQ ID NO: 2, 5, 9, 11, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, or a fragment thereof. In another embodiment, the polypeptide probe comprises a polypeptide sequence encoded by SEQ ID NO: 16, 19, 70, 72, 73, 74, 76, 77, 78, 79, 80, 81, 82, 83, 84, or a fragment thereof.
In one embodiment, the plurality of probes comprise a polypeptide probe comprising a full-length or fragment of a protein encoded by CEP164, RPL34, BRMSL1, NKX31, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, or Deaminase Domain. In one embodiment, the plurality of probes comprise a polypeptide probe comprising a polypeptide sequence selected from SEQ ID NOs. 2, 5, 56, 57, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, or 69. In one embodiment, the plurality of probes comprises a polypeptide probe comprising a polypeptide sequence encoded by SEQ ID NO: 16, 19, 70, 72, 73, 74, 76, 77, 78, 79, 80, 81, 82, 83, or 84.
In one embodiment, the plurality of probes comprise a polypeptide probe comprising a full-length or fragment of a protein encoded by FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789. In one embodiment, the plurality of probes comprise a polypeptide probe comprising a polypeptide sequence selected from SEQ ID NO: 9, 11, 14, or 60. In one embodiment, the plurality of probes comprises a polypeptide probe comprising a polypeptide sequence encoded by SEQ ID NO: 23, 25, 28, 71, or 75.
In another embodiment, an antibody profiling panel comprising: a plurality of polypeptide probes, wherein at least one of the polypeptide probes comprises a full-length or fragment of a protein that is DCHS1, CEP164, KBTBD6, RPS19, RPL34, RNA binding protein 6, or Hemk1; and each of the probes in the plurality of polypeptide probes is capable of being specifically bound by an antibody, is disclosed herein. In another embodiment, the plurality of probes further comprise a polypeptide probe comprising a full-length or fragment of a protein encoded by eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, or LOC388789. In one embodiment, the polypeptide probe comprises a sequence listed in Table 1 or 2, such as SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or a fragment thereof. In one embodiment the antibody is an autoantibody. In another embodiment the antibody is a human autoantibody. In one embodiment the presence of a human autoantibody that binds to a polypeptide probe is indicative of cancer (e.g. an expression level for one or more autoantibodies is indicative of the presence, absence, or stage of the cancer). In another embodiment the quantity or level of a human autoantibody that binds to a polypeptide probe is indicative of cancer. In one embodiment the cancer is a prostate, lung, breast or colon cancer.
In another embodiment, one or more of the probes is displayed by a phage. In one embodiment, the one or more probes is attached to a substrate, such as attached via a phage. In another embodiment, the substrate is an array. In yet another embodiment, the panel comprises at least 2, 3, 4, 5, 6, 7, 8, 9, or 10 different probes. In one embodiment, the panel characterizes a cancer, such as prostate cancer, with at least 80% sensitivity and specificity. In another embodiment, the panel screens for a cancer, such as prostate cancer, with at least 80% sensitivity and specificity.
Also provided herein is a method of characterizing or screening a subject for a cancer, such as prostate cancer, lung cancer, breast cancer or colon cancer. In one embodiment, the method comprises detecting in a sample obtained from a subject a presence or level of one or more antibodies to one or more polypeptide probes comprising a full-length or a fragment of a protein encoded by DCHS1, CEP164, KBTBD6, RPS19, RPL34, SFRS14, RNA binding protein 6, or Hemk1; and characterizing or identifying, the prostate cancer based on a presence or level of the one or more antibodies. In one embodiment, the method further comprises detecting a presence, absence or level of one or more antibodies to one or more polypeptide probe comprising a full-length or a fragment of a protein encoded by eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, or LOC388789. In one embodiment the antibody is an autoantibody. In another embodiment the antibody is a human autoantibody.
In another embodiment, the method comprises detecting in a sample obtained from a subject a presence or level of one or more antibodies to one or more polypeptide probes comprising a full-length or a fragment of a protein encoded by CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, or Deaminase Domain; and characterizing the prostate cancer based on a presence or level of the one or more antibodies. In one embodiment, the method further comprises detecting a presence, absence or level of one or more antibodies to one or more polypeptide probe comprising a full-length or a fragment of a protein encoded by FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789. In one embodiment the subject is a human. In one embodiment the antibody is an autoantibody. In another embodiment the antibody is a human autoantibody. In one embodiment the presence of a human autoantibody that binds to a polypeptide probe is indicative of cancer (e.g. an expression level for one or more autoantibodies is indicative of the presence, absence, or stage of the cancer). In another embodiment the quantity or level of a human autoantibody that binds to a polypeptide probe is indicative of cancer. In one embodiment the cancer is a prostate, lung, breast or colon cancer.
Also provided herein is a method of obtaining a biopsy, wherein a determination of whether a biopsy should be obtained is based on detecting an expression level for an antibody. In one embodiment, a subject suspected of having cancer based on an expression level of an antibody is recommended to have a biopsy obtained. In another embodiment, a biological sample is obtained from a subject with a PSA level of greater than about 2.5 ng/ml, and the sample is contacted with one or more probes for an antibody, and based on the expression level of an antibody, a biopsy is obtained or recommended for the subject. In one embodiment, the subject has a PSA level between about 2.5 ng/mL and about 10 ng/mL. In one embodiment the subject is a human. In one embodiment the antibody is an autoantibody. In another embodiment the antibody is a human autoantibody.
In one embodiment, the method further comprises contacting a biological sample obtained from the subject with one or more probes for a second antibody when the biopsy provides a positive result for a cancer, such as prostate cancer, and based on the expression level of the second antibody, a prognosis or theranosis is provided. In one embodiment the subject is a human. In one embodiment the second antibody is an autoantibody. In another embodiment the second antibody is a human autoantibody.
Also provided herein is a method of characterizing, identifying, or screening for a cancer in a subject. In one embodiment, the method comprises detecting an expression level for one or more antibodies, wherein the expression level of the one or more antibodies is indicative of the presence, absence, or stage of the cancer. In another embodiment, the indication is whether the cancer is aggressive or indolent. In one embodiment, the method of identifying a cancer as aggressive or indolent comprises: obtaining a positive biopsy result for cancer from the subject; contacting a biological sample obtained from the subject with one or more probes for an antibody; detecting an expression level for the antibody; and characterizing or identifying the cancer as aggressive or indolent based on the expression level of the antibody. In one embodiment the subject is a human. In one embodiment the antibody is an autoantibody. In another embodiment the antibody is a human autoantibody. In one embodiment the presence of a human autoantibody that binds to a polypeptide probe is indicative of cancer (e.g. an expression level for one or more autoantibodies is indicative of the presence, absence, or stage of the cancer). In another embodiment the quantity or level of a human autoantibody that binds to a polypeptide probe is indicative of cancer. In one embodiment the cancer is a prostate, lung, breast or colon cancer.
All publications and patent applications mentioned in this specification are herein incorporated by reference to the same extent as if each individual publication or patent application was specifically and individually indicated to be incorporated by reference.
The novel features of the disclosure are set forth with particularity in the appended claims. A better understanding of the features and advantages of the present disclosure will be obtained by reference to the following detailed description that sets forth illustrative embodiments, in which the principles of the disclosure are utilized, and the accompanying drawings of which:
The compositions and methods of the present disclosure relate to compositions and methods for characterizing a cancer or screening for a cancer. Provided herein are tests which can be used to analyze a presence or absence of an antibody from a subject, such as a subject being tested or screened for a cancer. In one embodiment, an antibody is an autoantibody. In another embodiment, the test comprises a single antigen, thus detecting only an antibody that binds to that antigen. In another embodiment, a panel of antigens is constructed such that the panel tests for a presence of one or more antibodies which specifically bind to two or more antigens derived from proteins associated with a specific cancer, such as lung cancer, prostate cancer, or ovarian cancer. By detecting an antibody to a protein associated with a disease state, the compositions and methods provided herein allow for the characterization of a cancer.
A cancer is characterized for a subject using a composition or method disclosed herein. In one embodiment, a subject is an individual or patient. In one embodiment, a subject is a human. In another embodiment, a subject is a cancer patient. In one embodiment, a subject exhibits no symptom of cancer, such as no symptoms of prostate cancer. In another embodiment, a subject has no detectable symptom of cancer, such as no detectable symptoms for prostate cancer. In yet another embodiment, a subject exhibits a symptom of cancer, such as a symptom for prostate cancer. In one embodiment, a subject is a human. In another embodiment, a subject is an individual. In yet another embodiment, a subject is a patient, such as a cancer patient.
Characterizing a cancer, or screening for a cancer, can include detecting the cancer (including pre-symptomatic early stage detecting), determining the prognosis, diagnosis, or theranosis of the cancer, or determining the stage or progression of the cancer. In one embodiment, a prognosis is predicting or giving a likelihood of outcome of a disease or condition, such as an extent of malignancy of a cancer, a likelihood of survival, or expected life expectancy, such as in an individual with prostate cancer. In another embodiment, a prognosis is a prediction or likelihood analysis of cancer progression, cancer recurrence, or metastatic spread or relapse.
In one embodiment, the diagnosis is prediction or likelihood an individual or subject has a disease or condition, such as prostate cancer. In one embodiment, the individual is an asymptomatic individual. In another embodiment, the individual is a symptomatic individual.
In one embodiment, a theranosis is a therapy selected based on an outcome of determining a binding of one or more antibodies from a sample from a subject to an antigen or polypeptide probe as described herein. In one embodiment, a theranosis is identifying an appropriate treatment or treatment efficacy for a cancer. In one embodiment, a theranosis is modifying a treatment. In another embodiment, a theranosis is selecting a treatment regimen. In yet another embodiment, a theranosis is discontinuing or not selecting a particular treatment regimen. In one embodiment a treatment regimen or therapeutic agent is selected based on the presence or absence of an autoantibody that binds to polypeptide probes described herein. In one embodiment the autoantibody is a human aautoantibody. In one embodiment a treatment regimen or therapeutic agent is excluded based on the presence or absence of an autoantibody that binds to polypeptide probes described herein. In one embodiment the autoantibody is a human aautoantibody.
In yet another embodiment, characterizing or screening for a cancer is detecting the cancer, such as pre-symptomatic early stage detecting. In one embodiment, characterizing a cancer is determining the stage or progression of the cancer, such as early-stage, late-stage or advanced stage of cancer. Characterizing or screening for a cancer can also be determining the likelihood or possibility an individual has a cancer. Characterizing or screening for a cancer can also be identification of a cancer, such as determining whether expression of one or more antibodies is indicative of the cancer.
In one embodiment, an antigen panel is used to detect a presence of one or more antibodies to one or more proteins, antigens, mimotopes, or epitopes. In one embodiment, one or more polypeptide probes described herein is a protein or fragment thereof. In another embodiment, one or more polypeptide probes described herein comprises an antigen, mimotope, or epitope. A “mimotope” can mimic the epitope of a protein or peptide. In one embodiment, the mimotope is structurally similar to an antigen or epitope of an expressed protein, but is unrelated or weakly related at the protein sequence level.
In one embodiment, the antigen panel comprises one or more polypeptide probes comprising a polypeptide sequence selected from SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, or a fragment thereof. In another embodiment, the antigen panel comprises one or more polypeptide probes comprising a sequence encoded by SEQ ID NO: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, or a fragment thereof. In yet another embodiment, the polypeptide probe comprises the full-length or a fragment of a protein that is encoded by SEQ ID NO: 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 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, or a fragment thereof.
In one embodiment, the antigen panel comprises one or more polypeptide probes derived from one or more proteins encoded by one or more genes selected from: CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, Deaminase Domain, FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789. In one embodiment, detection of one or more antibodies is used to detect a presence of prostate cancer in a subject.
In one embodiment, the antigen panel comprises one or more polypeptide probes derived from one or more proteins encoded by one or more genes selected from: DCHS1, CEP164, KBTBD6, RPS19, RPL34, RNA binding protein 6, Hemk1, eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, and LOC388789. In one embodiment, detection of one or more antibodies is used to detect a presence of prostate cancer in a subject.
A cancer can also be characterized by determining a presence or absence, or level, of one or more antibodies in a sample. In one embodiment, a sample is obtained from a subject. The subject can be a mammal, including, but not limited to, humans, non-human primates, rodents, and the like. In another embodiment, a sample is a biological fluid. The biological fluid can be, but not limited to, peripheral blood, sera, or plasma. The sample can be ascites, urine, cerebrospinal fluid (CSF), sputum, saliva, bone marrow, synovial fluid, aqueous humor, amniotic fluid, cerumen, breast milk, broncheoalveolar lavage fluid, semen, prostatic fluid, cowper's fluid or pre-ejaculatory fluid, female ejaculate, sweat, fecal matter, hair, tears, cyst fluid, pleural and peritoneal fluid, pericardial fluid, lymph, chyme, chyle, bile, interstitial fluid, menses, pus, sebum, vomit, vaginal secretions, mucosal secretion, stool water, pancreatic juice, lavage fluids from sinus cavities, or bronchopulmonary aspirates.
In one embodiment, the level, presence, or absence of an antibody can be determined by detecting the binding of one or more antibodies to a polypeptide probe. In one embodiment, an antibody is an autoantibody. An autoantibody refers to an antibody produced by a host (with or without immunization) and directed to a host antigen (such as a tumor antigen). Tumor-associated antigens recognized by humoral effectors of the immune system are an attractive target for diagnostic and therapeutic approaches to human cancer.
The binding of an antibody with a polypeptide probe can be specific, such that the interaction of the autoantibody with the polypeptide probe is dependent upon a presence of a particular structure (i.e., the antigenic determinant or epitope) of the polypeptide probe. Antigenic determinates or epitopes can comprise amino acids in linear or non-linear sequence in a polypeptide probe and can also comprise one or more amino acids which are in proximity to each other via protein folding (e.g., conformational epitopes). Thus, a single polypeptide or protein can potentially be bound by multiple antibodies which recognize different epitopes. In some instances, known epitopes of a particular polypeptide can be used as a probe to detect for a presence, absence or level of autoantibodies which bind a particular epitope
The polypeptide probe can be an antigen identified through serologic identification of antigens, for example by recombinant expression cloning (SEREX), such as described by Kim et al., Biotech. Lett. (2004); 26: 585-588. Generally, in this method, an antigen can be identified by screening expression cDNA libraries from human solid tumors with sera of autologous patients. This type of screening of a cDNA expression library by conventional methods typically requires the preparation of a large number of membrane filters blotted with bacteriophage plaques that are then searched with a specific probe. In the case of the SEREX experiments, the screening is performed using sera from cancer patients, which can be in very limited quantities.
A polypeptide probe for detecting an antibody can also be identified by phage-display technology, which can be based on the insertion of foreign nucleotide sequences into genes encoding for various capsid proteins of T7 phage, resulting in a heterogeneous mixture of phages, each displaying the different peptide sequence encoded by a corresponding insert. A physical link between a displayed fusion protein and DNA encoded for it make this phage target selectable. The phage target can express or display a polypeptide probe, which can be used to detect antibodies that are produced by a subject, or autoantibodies, which can then be used to detect or characterize a cancer. The polypeptide probe can be displayed by a phage and used to detect an antibody from a sample obtained from a subject. In one embodiment, an antibody is an autoantibody.
Provided herein is a composition and method for detecting one or more antibodies in a sample using one or more polypeptide probes. Polypeptide is used in its broadest sense and can include a sequence of subunit amino acids, amino acid analogs, or peptidomimetics. The subunits can be linked by peptide bonds. The polypeptides can be naturally occurring, processed forms of naturally occurring polypeptides (such as by enzymatic digestion), chemically synthesized or recombinantly expressed. The polypeptides for use in the methods of the present invention can be chemically synthesized using standard techniques. The polypeptides can comprise D-amino acids (which are resistant to L-amino acid-specific proteases), a combination of D- and L-amino acids, β amino acids, or various other designer or non-naturally occurring amino acids (e.g., β-methyl amino acids, Cα-methyl amino acids, and Nα-methyl amino acids, etc.) to convey special properties. Synthetic amino acids can include ornithine for lysine, and norleucine for leucine or isoleucine. In addition, the polypeptides can have peptidomimetic bonds, such as ester bonds, to prepare polypeptides with novel properties. For example, a polypeptide can be generated that incorporates a reduced peptide bond, i.e., R1—CH2—NH—R2, where R1 and R2 are amino acid residues or sequences. A reduced peptide bond can be introduced as a dipeptide subunit. Such a polypeptide can be resistant to protease activity, and can possess an extended half-life in vivo. A polypeptide can also include a peptoid (N-substituted glycines), in which the one or more side chains are appended to nitrogen atoms along the molecule's backbone, rather than to the α-carbons, as in amino acids. Polypeptide and peptide are intended to be used interchangeably throughout this application, i.e. where the term peptide is used, it can also include polypeptide and where the term polypeptides is used, it can also include peptide.
In one embodiment, a polypeptide probe can be a fragment or portion of a larger protein. A fragment can range in size from two amino acid residues to the entire amino acid sequence minus one amino acid. In one embodiment, a polypeptide probe is a fragment of an untranslated region (UTR) of a protein, such as a fragment that is encoded by a nucleic sequence that is a UTR region of a gene, such as the 5′ or 3′ UTR of a gene.
The fragment can be 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, 55, 60, 65, 70, 75, 80, 85, 90, 95, or 100 amino acids in size. In one embodiment, the fragment is less than about 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, 55, 60, 65, 70, 75, 80, 85, 90, 95, or 100 amino acids in size. A polypeptide probe useful in the compositions and methods herein, regardless of size, is capable of specific interaction with an antibody, such as an autoantibody.
In one embodiment, a polypeptide probe can be a fragment of a protein encoded by a gene, or a region upstream or downstream of a coding sequence, such as a UTR region, of a gene listed in Table 1, Table 2, Table 3 or Table 4. In one embodiment, the polypeptide probe comprises a polypeptide sequence selected from SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, or a fragment thereof. In another embodiment, the polypeptide probe comprises a polypeptide sequence encoded by SEQ ID NO: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, or a fragment thereof. In yet another embodiment, the polypeptide probe comprises the full-length or a fragment of a protein that is encoded by SEQ ID NO: 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 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, or a fragment thereof.
In one embodiment, a polypeptide probe is a fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene.
In one embodiment, the gene can be CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, or Deaminase Domain. In another embodiment, the gene is FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789.
In another embodiment, a polypeptide probe comprises SEQ ID NO: 2, 5, 9, 11, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, or a fragment thereof. In another embodiment, a polypeptide probe comprises a polypeptide encoded by SEQ ID NO: 16, 19, 23, 25, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, or a fragment thereof.
In one embodiment, the gene can be DCHS1, CEP164, KBTBD6, RPS19, RPL34, RNA binding protein 6, or Hemk1. In another embodiment, the gene is eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, or LOC388789. A polypeptide probe can comprise a peptide sequence, or fragment thereof, such as those listed in Tables 1, 2, 3 or 4.
In one embodiment, a polypeptide probe comprises SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or a fragment thereof. In another embodiment, a polypeptide probe comprises a polypeptide encoded by SEQ ID NO: 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, or a fragment thereof.
Homo
sapiens
sapiens 3
sapiens
sapiens BAC
Homo
sapiens
sapiens 3
An antibody, such as an autoantibody, to one or more of a protein, or a fragment of a protein, encoded by a gene such as listed in Tables 1, 2, 3 or 4, or a polypeptide encoded by a UTR sequence of a gene such as one listed in Tables 1, 2, 3 or 4, can be detected according to one or more methods described herein and used to characterize a cancer, such as prostate cancer. Many of the proteins may have a role in various cancers, including prostate cancer. For example, the human DCHS1 protein (protocadherin-16 precursor) is believed to be a calcium-dependent cell adhesion protein found in the cell membrane of fibroblast cells. Without being bound by theory, DCHS1 is a cadherin, a class of type-1 transmembrane proteins. Cadherins typically play important roles in cellular adhesion, for example, by binding cells expressing similar cadherins to each other. Structurally, DCHS1 is thought to contain 27 cadherin repeats (extracellular calcium ion-binding domains). DCHS1 expression has been associated with certain cancers, potentially playing a role in tumor adherence (see, e.g., Sjöblom, et. al. Science, (2006) 314:268-274).
Another of the proteins, CEP164 is believed to be a centrosomal protein which binds chromatin and plays a role in the DNA damage-activated signaling cascade. It is known to interact with ataxia telangiectasia mutated (ATM) and ATM/Rad3-related (ATR) kinases which phosphorylate CEP164 upon replication stress, ultraviolet radiation (UV), and ionizing radiation (IR). CEP164 also plays a role in cell cycle regulation, specifically at the G2/M checkpoint and in nuclear division (see, e.g., Sivasubramaniam et al., Genes & Dev. (2008); 22(5):687-600). As CEP 164 plays a role in genome stabilization, misregulation or mutation of this gene and/or protein can play a role in certain cancers.
In a further example, the human KBTBD6 (kelch repeat and BTB (POZ) domain containing 6) is a protein expressed in a wide variety of normal tissues. Its expression and/or misregulation has also been noted in multiple cancer types, including prostate, ovarian, kidney and lung tumors. The function of the protein is not currently known, however, the presence of the kelch repeat and BTB domain suggest that the protein is involved in protein-protein interactions and actin filament organization.
Certain ribosomal proteins, such as RPS19 and RPL34 have also been associated with certain cancers. RPS19 (ribosomal protein S19) encodes a ribosomal protein that is a component of the 40S subunit. Located in the cytoplasm as part of the ribosomal complex, mutations in this gene are associated with Diamond-Blackfan anemia, suggesting a non-ribosomal function for the protein in erythropoietic differentiation. RPS19 protein is also known to interact with fibroblast growth factor-2 (see, e.g., Soulet et al., Biochem. Biophys. Res. Commun. (2001); 289:591-596). Increased expression of RPS19 has been associated with some cancers, but the role of RPS19 in cancer development is unknown. RPL34 (60S Ribosomal protein L34) is a ribosomal protein that is a component of the 60S subunit and is located in the cytoplasm. Expression of the gene encoding the RPL34 protein is known to be regulated by c-MYC and has been shown to have increased expression in primary invasive and metastatic breast cancer cells and colorectal cancer cells (see, e.g., Zucchi et al., Proc. Nat'l Acad. Sci., (2004); 101:18147-18152; Sjöblom, et. al. Science, (2006) 314:268-274).
Certain nucleic acid-binding proteins, such as RMB6 and HEMK1 have also been associated with certain cancers when misregulated and/or mutated. RBM6 (RNA binding protein 6) is a cytosolic protein that binds to poly-G homopolymers in vitro, but its function in vivo is not currently known. The protein thought to be phosphorylated (potentially by ATM or ATR) in its active form. The gene encoding the protein, without being bound by theory, is located in a portion of the genome, modifications of which are associated with cancerous transformation, such as lung carcinomas. Additionally, translocations of the gene which result in aberrant fusion proteins have been reported to be associated with cancer cells (see, e.g., Gu et al., Blood, (2007); 110:323-333). The human HEMK1 (HEMK methyltransferase family protein 1) protein is an S-adenosylmethionine-dependent methyltransferase and is also thought to bind nucleic acids. HEMK1 is considered a tumor-suppressor, misregulation of which is associated with various cancers, including prostate cancer, pancreatic cancer and liver cancer (see, e.g., U.S. Pat. App. Pub. No. 2008/0213791).
Thus one or more polypeptide probes, such as a fragment of a protein encoded by a gene, or a polypeptide encoded by a sequence of a UTR region of a gene, such as a gene listed in Tables 1, 2, 3 or 4, can be used to detect one or more antibodies, such as autoantibodies, from a sample from a subject. In one embodiment, the polypeptide probe comprises a polypeptide sequence selected from SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, or a fragment thereof. In another embodiment, the polypeptide probe comprises a polypeptide sequence encoded by SEQ ID NO: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, or a fragment thereof. In yet another embodiment, the polypeptide probe comprises the full-length or a fragment of a protein that is encoded by SEQ ID NO: 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 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, or a fragment thereof.
In one embodiment, a polypeptide probe is a fragment of a protein encoded by CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, or Deaminase Domain, or may be a polypeptide encoded by a UTR sequence of the gene, such as the 5′ or 3′ UTR sequence of CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, or Deaminase Domain. In one embodiment, a polypeptide probe can be a fragment of a protein encoded by FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789. In one embodiment, a polypeptide probe comprises a peptide sequence, or fragment thereof, such as those listed in Tables 1, 2, 3, and 4. The polypeptide probe can comprise SEQ ID NO: 2, 5, 9, 11, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, or a fragment thereof, or a fragment thereof. In another embodiment, the polypeptide probe comprises a polypeptide encoded by SEQ ID NO: 16, 19, 23, 25, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, or a fragment thereof.
In another embodiment, a polypeptide probe is a fragment of a protein encoded by DCHS1, CEP164, KBTBD6, RPS19, RPL34, RNA binding protein 6, or Hemk1, or may be a polypeptide encoded by a UTR sequence of the gene, such as the 5′ or 3′ UTR sequence of DCHS1, CEP164, KBTBD6, RPS19, RPL34, RNA binding protein 6, or Hemk1. In one embodiment, a polypeptide probe can be a fragment of a protein encoded by eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, or LOC388789. In one embodiment, a polypeptide probe comprises a peptide sequence, or fragment thereof, such as those listed in Tables 1 and 2. The polypeptide probe can comprise SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14, or a fragment thereof. In another embodiment, the polypeptide probe comprises a polypeptide encoded by SEQ ID NO: 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, or a fragment thereof.
Also provided herein is an antibody profiling panel. A panel as provided herein can be used to analyze one or more antibodies to a plurality of polypeptide probes, such as one or more autoantibodies. A panel allows for the simultaneous analysis of multiple antibodies, such as autoantibodies, to a plurality of polypeptide probes correlating with carcinogenesis and/or metastasis. For example, a panel can include markers identified as correlating with cancerous tissue, metastatic cancer, localized cancer that is likely to metastasize, pre-cancerous tissue that is likely to become cancerous, and pre-cancerous tissue that is not likely to become cancerous. Depending on the subject, panels may be analyzed alone or in combination in order to provide the best possible diagnosis and/or prognosis.
In one embodiment, an antibody profiling panel can comprise a plurality of polypeptide probes, wherein one or more of the probes is capable of binding an antibody. In another embodiment an antibody profiling panel can comprise a plurality of probes, wherein one or more of the probes is capable of binding an antibody that targets a foreign antigen. In another embodiment an antibody profiling panel can comprise a plurality of probes, wherein each of the probes is capable of binding an autoantibody.
In one embodiment, an antibody profiling panel comprises 2-100 probes, 50-200 probes, 100-500 probes 200-750 probes, 200-1000 probes, 2-5,000 probes or 2-10,000 probes. In one embodiment, an antibody profiling panel comprises at least about 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, 55, 60, 65, 70, 75, 80, 85, 90, 95, or 100 polypeptide probes. In another embodiment, an antibody profiling panel comprises at least about 50, 100, 150, 200, 250, 500, 750, 1000, 5000, 10,000, 15,000, 20,000, 25,000, 30,000, 40,000, 50,000, 60,000, 70,000, 75,000, or 100,000 polypeptide probes. In one embodiment, the probes are polypeptide probes. In another embodiment, the probes are molecules that mimic an epitope bound by a particular antibody.
An antibody profiling panel can comprise at least 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, or 14 polypeptide probes, wherein the polypeptide probes are a fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene, such as genes listed in Tables 1, 2, 3, or 4. In one embodiment, the polypeptide probe comprises a polypeptide sequence selected from SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, or a fragment thereof. In another embodiment, the polypeptide probe comprises a polypeptide sequence encoded by SEQ ID NO: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, or a fragment thereof. In yet another embodiment, the polypeptide probe comprises the full-length or a fragment of a protein that is encoded by SEQ ID NO: 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 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, or a fragment thereof.
In one embodiment, an antibody profiling panel comprises a plurality of polypeptide probes, wherein at least a subset of the polypeptide probes is a fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene, wherein the gene is CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, or Deaminase Domain. In one embodiment, the polypeptide probe can comprise a fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene, wherein the gene is FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789.
In another embodiment, an antibody profiling panel comprises a plurality of polypeptide probes, wherein at least a subset of the polypeptide probes is a fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene, wherein the gene is DCHS1, CEP164, KBTBD6, RPS19, RPL34, RNA binding protein 6, or Hemk1. In one embodiment, the polypeptide probe can comprise a fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene, wherein the gene is eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, or LOC388789.
In one embodiment, an antibody profiling panel comprises a plurality of polypeptide probes, wherein at least a subset of the polypeptide probes is a peptide sequence, or fragment thereof, as listed in Tables 1, 2, 3, or 4. In one embodiment, an antibody profiling panel comprises a plurality of polypeptide probes, wherein at least a subset of the polypeptide probes comprises a polypeptide sequence selected from SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, or a fragment thereof. In another embodiment, an antibody profiling panel comprises a plurality of polypeptide probes, wherein at least a subset of the polypeptide probes comprises a polypeptide sequence encoded by SEQ ID NO: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, or a fragment thereof. In yet another embodiment, the polypeptide probe comprises the full-length or a fragment of a protein that is encoded by SEQ ID NO: 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 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, or a fragment thereof.
In another embodiment, an antibody profiling panel comprises a plurality of polypeptide probes, wherein at least a subset of the polypeptide probes comprises SEQ ID NO: 2, 5, 9, 11, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, or a fragment thereof, or a fragment thereof. In another embodiment, an antibody profiling panel comprises a plurality of polypeptide probes, wherein at least a subset of the polypeptide probes is encoded by SEQ ID NO: 16, 19, 23, 25, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, or a fragment thereof.
In one embodiment, an antibody profiling panel comprises a plurality of polypeptide probes, wherein at least a subset of the polypeptide probes comprises SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14, or a fragment thereof. In another embodiment, an antibody profiling panel comprises a plurality of polypeptide probes, wherein at least a subset of the polypeptide probes is encoded by SEQ ID NO: 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, or a fragment thereof.
In one embodiment, an antibody profiling panel can also comprise one or more polypeptide probes of the protein PSA, or fragment of PSA, in combination with one or more of the polypeptide probes discussed herein.
In one embodiment, an antibody profiling panel can comprise polypeptide probes including a full-length protein or fragment of PSA and one or more polypeptide probes comprising SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, or a fragment thereof. In another embodiment, an antibody profiling panel can comprise polypeptide probes including a full-length protein or fragment of PSA and one or more polypeptide probes comprising a polypeptide sequence encoded by SEQ ID NO: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, or a fragment thereof. In yet another embodiment, the polypeptide probe comprises the full-length or a fragment of a protein that is encoded by SEQ ID NO: 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 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, or a fragment thereof.
In another embodiment, an antibody profiling panel can comprise polypeptide probes including a full-length protein or fragment of PSA and a full-length protein encoded by a gene, fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene, wherein the gene is CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, or Deaminase Domain. In yet another embodiment, an antibody profiling panel can comprise a plurality of polypeptide probes, wherein the probes include a full-length protein or fragment of PSA and a full-length protein encoded by a gene, fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene, wherein the gene is FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789.
In another embodiment, an antibody profiling panel can comprise polypeptide probes including a full-length protein or fragment of PSA and a full-length protein encoded by a gene, fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene, wherein the gene is DCHS1, CEP164, KBTBD6, RPS19, RPL34, RNA binding protein 6, or Hemk1. In yet another embodiment, an antibody profiling panel can comprise a plurality of polypeptide probes, wherein the probes include a full-length protein or fragment of PSA and a full-length protein encoded by a gene, fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene, wherein the gene is eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, or LOC388789.
In another embodiment, an autoantibody profiling panel can comprise a plurality of polypeptide probes, wherein the probes includes a full-length protein or fragment of PSA and one or probes comprising a peptide sequence, or fragment thereof, as listed in Tables 1, 2, 3 and 4. In one embodiment, an autoantibody profiling panel can comprise a plurality of polypeptide probes, wherein the probes includes a full-length protein or fragment of PSA and one or more probes comprising SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, or a fragment thereof. In another embodiment, an autoantibody profiling panel can comprise a plurality of polypeptide probes, wherein the probes includes a full-length protein or fragment of PSA and one or more probes comprising a polypeptide sequence encoded by SEQ ID NO: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, or a fragment thereof. In yet another embodiment, an autoantibody profiling panel can comprise a plurality of polypeptide probes, wherein the probes includes a full-length protein or fragment of PSA and one or more probes comprising the full-length or a fragment of a protein that is encoded by SEQ ID NO: 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 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, or a fragment thereof.
In another embodiment, an autoantibody profiling panel can comprise a plurality of polypeptide probes, wherein the probes includes a full-length protein or fragment of PSA and one or more probes comprising SEQ ID NO: 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, or a fragment thereof.
In another embodiment, an autoantibody profiling panel can comprise a plurality of polypeptide probes, wherein the probes includes a full-length protein or fragment of PSA and one or more probes comprising SEQ ID NO: 2, 5, 9, 11, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, or a fragment thereof, or a fragment thereof; or a polypeptide sequence encoded by a sequence selected from SEQ ID NOs. 16, 19, 23, 25, 28, 70, 71, 72, 73, 74, 75,76, 77, 78, 79, 80, 81, 82, 83, 84, or a fragment thereof.
In one embodiment, a PSA polypeptide probe can be combined with any two or more of the polypeptide probes described herein, such as a polypeptide probe derived from a protein encoded by a gene, fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene, wherein the gene is CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, Deaminase Domain, FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789.
In another embodiment, a PSA polypeptide probe can be combined with any two or more of the polypeptide probes described herein, such as a polypeptide probe derived from a protein encoded by a gene, fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene, wherein the gene is DCHS1, CEP164, KBTBD6, RPS19, RPL34, RNA binding protein 6, Hemk1, eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, or LOC388789.
In yet another embodiment, a PSA polypeptide probe can be combined with at least 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14 of polypeptide probes disclosed herein, such as listed in Tables 1, 2, 3, and 4. In one embodiment, a polypeptide probe comprises SEQ ID NO: 2, 5, 9, 11, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, or a fragment thereof, or a fragment thereof. In one embodiment, a polypeptide probe comprises SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14, or a fragment thereof. In another embodiment, a polypeptide probe comprises SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, or a fragment thereof.
In another embodiment, a polypeptide probe comprises a polypeptide encoded by SEQ ID NO: 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, or a fragment thereof. In another embodiment, a polypeptide probe comprises a polypeptide encoded by SEQ ID NO: 16, 19, 23, 25, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, or a fragment thereof. In yet another embodiment a polypeptide probe comprises a polypeptide encoded by SEQ ID NO: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, or a fragment thereof.
In one embodiment, a polypeptide probe disclosed herein is attached to a substrate (e.g., glass slide chip or nanowell chip). A polypeptide probe can be directly or indirectly attached to the substrate. In one embodiment, a polypeptide probe is attached to a substrate via a phage. The substrate can be any physically separable solid to which a polypeptide probe can be directly or indirectly attached including, but not limited to, surfaces provided by microarrays and wells, particles such as beads, columns, optical fibers, wipes, glass and modified or functionalized glass, quartz, mica, diazotized membranes (paper or nylon), polyformaldehyde, cellulose, cellulose acetate, paper, ceramics, metals, metalloids, semiconductive materials, quantum dots, coated beads or particles, other chromatographic materials, magnetic particles; plastics (including acrylics, polystyrene, copolymers of styrene or other materials, polypropylene, polyethylene, polybutylene, polyurethanes, TEFLON™, etc.), polysaccharides, nylon or nitrocellulose, resins, silica or silica-based materials including silicon and modified silicon, carbon, metals, inorganic glasses, plastics, ceramics, conducting polymers (including polymers such as polypyrole and polyindole); micro or nanostructured surfaces such as nucleic acid tiling arrays, nanotube, nanowire, or nanoparticulate decorated surfaces; or porous surfaces or gels such as methacrylates, acrylamides, sugar polymers, cellulose, silicates, or other fibrous or stranded polymers.
The polypeptide probe can bound to a planar surface or to a particle, such as a bead or microsphere. In one embodiment, the polypeptide probe is attached to a bead. The bead can be a polystyrene, brominated polystyrene, polyacrylic acid, polyacrylonitrile, polyacrylamide, polyacrolein, polydimethylsiloxane, polybutadiene, polyisoprene, polyurethane, polyvinyl acetate, polyvinylchloride, polyvinylpyridine, polyvinylbenzylchloride, polyvinyltoluene, polyvinylidene chloride, polydivinylbenzene, polyglycidylmethacrylate, polymethylmethacrylate, or copolymers, blends, composites, or combination thereof. The bead can have a diameter of between about 1 nm-1000 μm, 1 nm-500 μm, 5 nm-500 μm, or 10 nm-100 μm. In one embodiment, the bead has a diameter of between about 10 nm and 100 μm. In yet another embodiment, the bead has a diameter of less than about 1000 μm, 500 μm, 400 μm, 300 μm, 200 μm, or 100 μm.
In one embodiment, the bead is labeled or stained with more than one dye, such as at least 2, 3, 4, 5, 6, 7, 8, 9, or 10 different dyes. In one embodiment, the bead is labeled or stained with two dyes. In another embodiment, the two dyes are hydrophobic. In another embodiment, the two dyes are fluorescent dyes, such as squaric acid-based dyes. In yet another embodiment, the squaric acid-based dyes are selected from cyclobutenedione derivatives, symmetrical and unsymmetrical squaraines, substituted cephalosporin compounds, fluorinated squaraine compositions, alkylalkoxy squaraines, or squarylium compounds. In another embodiment, the squaric acid-based dyes are selected from a red fluorescent dye and an orange fluorescent dye, such as the red fluorescent dye comprising 1,3-bis(1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)methyl]-2,4-dihydro xycyclobutenediylium, bis(inner salt) and the orange fluorescent dye comprising 2-(3,5-dimethylpyrrol-2-yl)-4-(3,5-dimethyl-2H-pyrrol-2-ylidene)-3-hydroxy-2-cyclobuten-1-one.
In one embodiment, the substrate is coated using passive or chemically-derivatized coatings with any number of materials, including polymers, such as dextrans, acrylamides, gelatins or agarose. Such coatings can facilitate the use of the array with a biological sample.
A presence of an immune response to a specific protein expressed in cancerous cells can be indicative of a presence of cancer. Accordingly, the present invention provides a method (e.g., diagnostic or screening method) for detecting a presence of an antibody, such as an autoantibody, to a tumor or tumor-associated antigen. In one embodiment, the presence of an antibody in cancerous but not cancerous cells is indicative of the presence of cancer. In one embodiment, the antibody is an antibody to a tumor antigen.
A method or composition disclosed herein can find utility in the diagnosis, screening, or characterization of a cancer. In one embodiment, a presence of an antibody, such as an autoantibody, to a specific protein can be indicative of a cancer. In another embodiment, detection of an antibody in a sample, such as an autoantibody, can be indicative of a specific stage or sub-type of the same cancer. The information obtained by detecting an antibody as described herein can be used to determine a prognosis or theranosis, wherein an appropriate course of treatment can be determined. In another embodiment, a subject with a specific antibody or stage of cancer can respond differently to a given treatment than individuals lacking the antibody. The information obtained from a method disclosed herein can thus provide for the personalization of diagnosis and treatment.
In one embodiment, a cancer is characterized by detecting the level or presence or absence of an antibody, such as an autoantibody, in a sample. The cancer can be, but is not limited to, breast cancer, ovarian cancer, lung cancer, colon cancer, hyperplastic polyp, adenoma, colorectal cancer, high grade dysplasia, low grade dysplasia, prostatic hyperplasia, prostate cancer, melanoma, pancreatic cancer, brain cancer (such as a glioblastoma), hematological malignancy, hepatocellular carcinoma, cervical cancer, endometrial cancer, head and neck cancer, esophageal cancer, gastrointestinal stromal tumor (GIST), renal cell carcinoma (RCC) or gastric cancer. The colorectal cancer can be CRC Dukes B or Dukes C-D. The hematological malignancy can be B-Cell Chronic Lymphocytic Leukemia, B-Cell Lymphoma-DLBCL, B-Cell Lymphoma-DLBCL-germinal center-like, B-Cell Lymphoma-DLBCL-activated B-cell-like, and Burkitt's lymphoma. The cancer can also be a premalignant condition, such as Barrett's Esophagus.
In one embodiment, a method for screening or characterizing a prostate cancer is provided. In one embodiment, the method can comprise detecting in a sample obtained from a subject a presence and/or level of one or more autoantibodies to one or more polypeptide probes comprising a polypeptide probe is a fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene, wherein the gene is CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, Deaminase Domain, FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789. A polypeptide probe can also comprise a polypeptide sequence, or a fragment thereof, selected from Table 1, 2, 3 and 4, such as a polypeptide probe comprising polypeptide probe comprises SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14, or a fragment thereof, or a polypeptide probe comprising a polypeptide encoded by SEQ ID NO: 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, or a fragment thereof. A polypeptide probe can also comprise SEQ ID NO: 12, 5, 9, 11, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, or a fragment thereof, or a fragment thereof, or a polypeptide encoded by SEQ ID NO: 16, 19, 23, 25, 28, 70, 71, 72, 73, 74, 75,76, 77, 78, 79, 80, 81, 82, 83, 84, or a fragment thereof.
In one embodiment, the method can comprise detecting in a sample obtained from a subject a presence and/or level of one or more autoantibodies to one or more polypeptide probes comprising a polypeptide probe is a fragment of a protein encoded by a gene, or a fragment encoded by a sequence of a UTR region of a gene, wherein the gene is DCHS1, CEP164, KBTBD6, RPS19, RPL34, SFRS14, RNA binding protein 6, Hemk1, eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, or LOC388789. A polypeptide probe can also comprise a polypeptide sequence, or a fragment thereof, selected from Table 1 or Table 2, such as a polypeptide probe comprising SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13 or 14, or a fragment thereof, or a polypeptide probe encoded by SEQ ID NO: 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, or a fragment thereof.
In yet another embodiment, the method can comprise detecting in a sample obtained from a subject a presence and/or level of one or more autoantibodies to one or more polypeptide probes comprising SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, or a fragment thereof, or a fragment thereof; or polypeptide probe encoded by SEQ ID NO: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, or a fragment thereof; or polypeptide probe comprising full-length or a fragment of a protein that is encoded by SEQ ID NO: 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 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, or a fragment thereof.
Depending on the results, a cancer (or absence of cancer) can be characterized. For example, in a sample from a subject a presence or level of DCHS1, CEP164 and/or RPS19 autoantibodies is detected, indicating a presence of prostate cancer in the subject. Alternately, a method further comprises detecting a presence or level of one or more autoantibodies to one or more polypeptide probe comprising a fragment of eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, or LOC388789. The fragment of a protein encoded by eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, or LOC388789 can comprise a polypeptide sequence selected from Table 2.
A method disclosed herein can comprise detecting a plurality of antibodies, such as through the detection of binding of one or more antibodies that bind to a plurality of polypeptide probes. In one embodiment, the antibodies are autoantibodies. In another embodiment, the antibodies are antibodies to foreign antigens. In one embodiment, the method comprises detecting in a sample one or more antibodies that binds to a panel of polypeptide probes, wherein the panel comprises 2-100 probes, 50-200 probes, 100-500 probes 200-750 probes, 200-1000 probes, 2-5,000 probes or 2-10,000 probes. In another embodiment, the panel of polypeptide probes comprises at least about 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, 55, 60, 65, 70, 75, 80, 85, 90, 95, or 100 polypeptide probes. In another embodiment, the panel comprises at least about 50, 100, 150, 200, 250, 500, 750, 1000, 5000, 10,000, 15,000, 20,000, 25,000, 30,000, 40,000, 50,000, 60,000, 70,000, 75,000, or 100,000 polypeptide probes. In one embodiment, the panels comprises a plurality of polypeptide probes, wherein a subset of the probes comprise fragments of the same full-length protein, such that autoantibodies to different epitopes bind to the different probes and indicate a presence of an immune response, or antibody, to the full-length protein.
A panel comprising multiple polypeptide probes allow for the simultaneous analysis of multiple markers correlating with carcinogenesis and/or metastasis. In one embodiment, a panel includes markers identified as correlating with cancerous tissue, metastatic cancer, localized cancer that is likely to metastasize, pre-cancerous tissue that is likely to become cancerous, pre-cancerous tissue that is not likely to become cancerous, or any combination thereof. Depending on the subject, a panel can be analyzed alone or in combination in order to provide a diagnosis, prognosis, or theranosis. One or more markers for inclusion on a panel can be selected by screening for their diagnostic, prognostic, or theranostic value.
Any of the proteins listed in Tables 1, 2, 3 or 4, or proteins encoded by the genes listed in Tables 1, 2, 3 or 4, in any combination, can be utilized to detect a presence of an antibody, such as an autoantibody, in a subject. In one embodiment, the protein is encoded SEQ ID NO: 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 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, or a fragment thereof.
In one embodiment, detection of an autoantibody to a protein encoded by a gene, a fragment encoded by a sequence of a UTR region of a gene, or fragment of a protein encoded by a gene, wherein the gene is CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, Deaminase Domain, FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789, or any combination thereof, is indicative of a presence of prostate cancer in a subject. In another embodiment, any combination of two or more proteins (e.g., cancer markers) or fragments thereof is used to detect one or more autoantibodies (e.g., a panel consisting of one or more full-length or fragments of the polypeptides listed in Tables 1, 2, 3, and/or 4).
In another embodiment, detection of an autoantibody to a protein encoded by a gene, a fragment encoded by a sequence of a UTR region of a gene, or fragment of a protein encoded by a gene, wherein the gene is CEP164, KBTBD6, RPS19, RPL34, RNA binding protein 6, Hemk1, eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, LOC388789, or any combination thereof, is indicative of a presence of prostate cancer in a subject. In another embodiment, any combination of two or more proteins (e.g., cancer markers) or fragments thereof is used to detect one or more autoantibodies (e.g., a panel consisting of one or more full-length or fragments of the polypeptides listed in Tables 1 and 2).
In one embodiment, the method comprises detecting one or more antibodies that bind to at least 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, or 14 polypeptide probes, wherein the polypeptide probes are full-length or fragments of proteins encoded by the genes listed in Tables 1, 2, 3, and/or 4, or polypeptides encoded by the UTR sequence of the gene. In one embodiment, the antibody profiling panel comprises a plurality of polypeptide probes, wherein one or more polypeptide probes is a protein or fragment of a protein encoded by CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, Deaminase Domain, FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789, or any combination thereof. In another embodiment, the antibody profiling panel comprises a plurality of polypeptide probes, wherein one or more polypeptide probes is a protein or fragment of a protein encoded by DCHS1, CEP164, KBTBD6, RPS19, RPL34, RNA binding protein 6, Hemk1, eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, LOC388789, or any combination thereof.
The cancer can be characterized with increased accuracy, such as with increased specificity, sensitivity, or both. The sensitivity can be determined by: (number of true positives)/(number of true positives+number of false negatives), whereas the specificity can be determined by: (number of true negatives)/(number of true negatives+number of false positives).
In one embodiment, the cancer can be characterized (e.g., detected, prognosed, etc.) with at least 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, 55, 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 or 100% sensitivity. In another embodiment, the cancer can be characterized (e.g., detected, prognosed, etc.) with at least 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, 55,60, 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 or 100% specificity.
Specificity or sensitivity of detection can be altered by altering the polypeptide probe make-up of a panel. In one embodiment, sensitivity of a diagnostic, prognostic, or theranosstic assay (e.g., an antibody detection assay, such as an autoantibody detection assay) can be increased by increasing the number of probes, increasing the diversity of probes (e.g, utilizing probes comprising distinct epitopes from the same and/or different markers), or tailoring the probes to a particular subject or cancer to be diagnosed/prognosed. Furthermore, the confidence level for determining the specificity, sensitivity, or both, may be with at least 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, 55,60, 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, or 99% confidence.
A method and system disclosed herein can also comprise detecting a plurality of antibodies, such as through the detection of antibodies binding to a plurality of polypeptide probes, and characterizing or screening for a cancer with increased or greater specificity as compared to a characterization based on detection of antibodies that bind to less than the plurality of polypeptide probes. In one embodiment, the antibodies are autoantibodies. In another embodiment, the antibodies are to foreign antigens.
Two or more polypeptide probes can be used to diagnose a particular cancer. For example, a cancer can be diagnosed by measuring the binding of autoantibodies to two polypeptide probe. The number of polypeptide useful for diagnosing a cancer includes, but is not limited to, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, and 20 polypeptide probes. In another embodiment, prostate cancer is diagnosed with 5 or more polypeptide probes. In one embodiment, prostate cancer is diagnosed with 5 polypeptide probes, which provides a diagnosis that has a higher sensitivity as compared to using less than the 5 polypeptide probes. In another embodiment, prostate cancer is diagnosed with 10 or more polypeptide probes. In another embodiment, a prostate cancer is diagnosed with 10 polypeptide probes, which provides a diagnosis that has a higher specificity as compared to using less than the 10 polypeptide probes.
The level, presence or absence of an antibody can be determined by detecting the binding of one or more autoantibodies to a polypeptide probe. Detection of an antibody can be either quantitative or qualitative. For quantitative assays, the amount of antibody detected can be compared to a control or reference to determine whether an antibody is overexpressed or underexpressed in a sample. For example, the control or reference can be a normal sample or a sample from a known disease state, such as a cancer sample.
Antibody binding to a polypeptide probe can be detected by techniques known in the art, such as, but not limited to, radioimmunoassay, ELISA (enzyme-linked immunosorbant assay), “sandwich” immunoassays, immunoradiometric assays, gel diffusion precipitation reactions, immunodiffusion assays, in situ immunoassays (e.g., using colloidal gold, enzyme or radioisotope labels, for example), Western blots, precipitation reactions, agglutination assays (e.g., gel agglutination assays, hemagglutination assays, etc.), complement fixation assays, immunofluorescence assays, protein A assays, and immunoelectrophoresis assays. Any of the assays used can be quantitative or qualitative, as desired.
Detection of an antibody bound to a polypeptide probe can be detected using labeling technology. For example, one or more antibodies in a sample collected from a subject to be tested can be directly labeled (e.g., with a fluorescent or radioactive label) and exposed to a polypeptide probe or probe panel. Detection of a signal from the interaction can be achieved using methodology appropriate to the type of label used (e.g., fluorescent microscopy can be used to detect binding of a fluorescently labeled autoantibody to a polypeptide probe). In one embodiment, an autoantibody is detected by detecting binding of a labeled secondary antibody or other antibody-binding reagent which specifically binds to the antibody bound to the polypeptide probe (e.g., a “sandwich immunoassay”). Many methods are known in the art for detecting binding in an immunoassay and are within the scope of the present invention. In one embodiment, the immunoassay described in U.S. Pat. Nos. 5,599,677, 5,672,480, or both, each of which is herein incorporated by reference, is used.
In one embodiment, automation is utilized to detect binding of one or more autoantibodies to a polypeptide probe or probe panels. Methods for the automation of immunoassays include those described in U.S. Pat. Nos. 5,885,530, 4,981,785, 6,159,750, and 5,358,691, each of which is herein incorporated by reference. Analysis and/or presentation of results can also be automated. In one embodiment, a computer with software that analyzes raw data and generates a prognosis, diagnosis, or theranosis based on the level, presence or absence of antibody binding to one or more polypeptide probes is used. A computer-based analysis program can be used to translate the raw data generated by the detection assay (e.g., a presence, absence, or amount of antibody binding to one or more polypeptide probes) into data of predictive value for a clinician. The clinician can access the predictive data using any suitable means. In one embodiment, the data is transmitted over a network. In another embodiment, the data is accessible by a clinician.
Any method capable of receiving, processing, and transmitting the information to and from a laboratory conducting the assay, medical personnel, and a subject can be used. In one embodiment, a sample (e.g., a biopsy or a serum or urine sample) is obtained from a subject and submitted to a profiling service (e.g., clinical lab at a medical facility, genomic profiling business, etc.), located in any part of the world (e.g., in a country different than the country where the subject resides or where the information is ultimately used) to generate raw data. In one embodiment, the sample comprises a tissue or other biological sample and the subject visits a medical center to have the sample obtained and sent to the profiling center. In another embodiment, a subject collects the sample themself (e.g., a buccal swab) and directly sends it to a profiling center. In another embodiment, the sample comprises previously determined biological information. The information can be directly sent to the profiling service by the subject (e.g., an information card containing the information may be scanned by a computer and the data transmitted to a computer of the profiling center using an electronic communication system). Upon being received by the profiling service, a sample can be processed and a profile produced (i.e., antibody level, presence or absence of antibody). A profile generated can be specific for the diagnostic, prognostic, or theranostic information desired for a subject. In one embodiment, a sample from a subject is analyzed for a presence or expression level of one or more antibodies to one or more proteins encoded by a gene, fragment of one or more proteins encoded by a gene, or fragment encoded by a UTR region of a gene, wherein the gene is CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, Deaminase Domain, FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789. In one embodiment, the antibodies are autoantibodies. In another embodiment, a sample from a subject is analyzed for a presence or expression level of one or more antibodies to one or more proteins encoded by a gene, fragment of one or more proteins encoded by a gene, or fragment encoded by a UTR region of a gene, wherein the gene is DCHS1, CEP164, KBTBD6, RPS19, RPL34, RNA binding protein 6, Hemk1, eIF4G1, BMI1, BRD2, RP3-323M22, SFRS14, or LOC388789. In one embodiment, the antibodies are autoantibodies.
Profile data can be prepared in a format suitable for interpretation by a treating clinician. In one embodiment, rather than providing raw expression data, the prepared format represents a diagnosis, screening or risk assessment (e.g., likelihood of metastasis or PSA failure or the development of high prostate specific antigen levels in a patient following prostate cancer therapy (e.g., surgery)) for the subject, along with recommendations for particular treatment options. The data can be displayed to the clinician by any suitable method. In one embodiment, the profiling service generates a report that is printed for the clinician (e.g., at the point of care). In another embodiment, the report is displayed to the clinician on a computer monitor.
In one embodiment, the information is first analyzed at the point of care or at a regional facility. The raw data is then sent to a central processing facility for further analysis. In one embodiment, further analysis comprises converting the raw data to information useful for a clinician or subject, such as a patient. The central processing facility can provide the advantage of privacy (all data is stored in a central facility with uniform security protocols), speed, and uniformity of data analysis. The central processing facility can also control the fate of the data following treatment of a subject. In one embodiment, using an electronic communication system, the central facility provides data to the clinician, the subject, researchers, or any other individual. In one embodiment, a subject is able to directly access the data using the electronic communication system. In another embodiment, a subject chooses further intervention or counseling based on the result. In one embodiment, the data is used for research use. The data can be used to further optimize the inclusion or elimination of markers as useful indicators of a particular condition or stage of disease.
The detection of one or more antibodies from a sample, such as described herein, can be used in conjunction with one or more other tests used for detecting or screening for cancer. The antibody detection can be used prior to, concurrent with, or subsequent to one or more other tests. In one embodiment, a genetic test for a mutation or expression level of one or more genes can be used in conjunction with determining the antibody profile of a subject.
Antibody detection can provide a non-invasive, inexpensive means for detecting or screening for a cancer. Thus, in one embodiment, the detection of a level, presence or absence of one or more antibodies can be used to determine whether a second sample or additional analysis of a sample from a subject is to be performed. In one embodiment, after detecting an expression level of one or more antibodies of sample obtained from subject to one or more polypeptide probes comprising a fragment of a protein encoded by, or a polypeptide encoded by a UTR sequence of, CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, Deaminase Domain, FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789, a biopsy can be recommended for the subject. In another embodiment, after detecting an expression level of one or more antibodies of sample obtained from subject to one or more polypeptide probes comprising a fragment of a protein encoded by, or a polypeptide encoded by a UTR sequence of, DCHS1, CEP164, KBTBD6, RPS19, RPL34, SFRS14, RNA binding protein 6, Hemk1, eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, or LOC388789, a biopsy can be recommended for the subject.
In another embodiment, an expression level for one or more antibodies from a subject can be detected, and based on the expression level of the one or more antibodies, the subject can be identified as suspected of having cancer. In one embodiment, the subject is characterized as having a high probability or likelihood of having cancer. Based on the detection or expression level of the one or more antibodies, a recommendation that a biopsy be obtained can be made for the subject. In another embodiment, if there is a lack of detection or expression of the one or more antibodies, further analysis is not recommended and a biopsy not be obtained. (see for example,
In another embodiment, prior to detecting one or more antibodies from a subject, the subject is suspected of having cancer. The subject can have had a genetic test for a mutation or gene expression analysis, image analysis (such as magnetic resonance imaging (MRI), positron emission tomography (PET) scan, computerized tomography (CT) scan, nuclear magnetic resonance (NMR)), or biopsy, and have inconclusive or uncertain results. Thus, prior to further analysis and treatment for a suspected cancer, the subject can seek further verification of their likelihood of having a cancer, or their diagnosis, prognosis, or theranosis of a cancer.
In one embodiment, an antibody profiling panel described herein can be used in conjunction with a separate test which determines a presence or level of PSA (e.g., a serum PSA test). In one embodiment, the panels is utilized to diagnose or prognose a presence of a cancer (e.g., prostate cancer) in a subject. In one embodiment, a subject is suspected of having prostate cancer based on their PSA level, age, or both. A subject can be male and over 30, 35, 40, 45, 50, 55, 60, 65, 70 or 75 years of age. In another embodiment, the subject is between 30-80, 40-75, 45-75, or 50-75 years of age. In another embodiment, the subject had a PSA blood test, digital rectal exam, or both. In yet another embodiment, the subject may have a PSA level of at least about 1.0, 1.5, 2.0, 2.5, or 4.0 ng/ml. The subject can have a PSA level of between about 1.0-15 ng/ml, 2.0-15 ng/ml, or 2.5-10 ng/ml.
In one embodiment, a biological sample from a subject, such as a subject with a PSA level greater than about 2.5 ng/ml, is contacted with one or more probes for an antibody, such as one or more probes for an autoantibody. Based on the expression level of the antibody, a biopsy for the subject can be recommended (see for example
In one embodiment, the antibody binds a polypeptide probe comprising SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, or a fragment thereof. In another embodiment, the antibody binds a polypeptide probe comprising a polypeptide sequence encoded by SEQ ID NO: 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, or a fragment thereof. In yet another embodiment, the antibody binds a polypeptide probe comprising full-length or a fragment of a protein that is encoded by SEQ ID NO: 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 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, or a fragment thereof.
In one embodiment, the antibody binds a polypeptide probe comprising a full-length or fragment of a protein encoded by, or a polypeptide encoded by a CEP164, RPL34, BRMSL1, NKX3-1, RPSA, Cytochrome C oxidase 5 Subunit, UTR-region of chromosome 11, MAPKKK9, cDNA clone XR—113641.1, PSA, H2aa4, UBE2I, TIMP2, WDR77, Deaminase Domain, FAM53B, 5′UTR BMI1, RP3-323M22, or LOC388789. In one embodiment, a polypeptide probe comprises SEQ ID NO: 2, 5, 9, 11, 14, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, or a fragment thereof, or a fragment thereof. In another embodiment, a polypeptide probe comprises a polypeptide encoded by SEQ ID NO: 16, 19, 23, 25, 28, 70, 71, 72, 73, 74, 75,76, 77, 78, 79, 80, 81, 82, 83, 84, or a fragment thereof.
In another embodiment, the antibody binds a polypeptide probe comprising a full-length or fragment of a protein encoded by, or a polypeptide encoded by a UTR of, DCHS1, CEP164, KBTBD6, RPS19, RPL34, RNA binding protein 6, Hemk1, eIF4G1, 5′UTR BMI1, BRD2, RP3-323M22, SFRS14, or LOC388789. In one embodiment, a polypeptide probe comprises SEQ ID NO: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or a fragment thereof. In another embodiment, a polypeptide probe comprises a polypeptide encoded by SEQ ID NO: 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, or a fragment thereof.
If a biopsy is recommended and the biopsy is positive for a cancer such as prostate cancer, a biological sample obtained from the subject can be contacted with one or more probes for an antibody, which can be the same or different, as those used in deciding whether to obtain a biopsy. Based on the expression level of antibodies in the sample, a prognosis for the cancer can be provided. (see for example,
Thus, in one embodiment, a method of characterizing or screening for a cancer from a subject with a positive biopsy result is provided. In another embodiment, the subject has not yet provided a sample for detecting one or more antibodies. In yet another embodiment, the subject has provided an initial sample for detecting one or more antibodies and detection of the one or more antibodies is used in deciding whether a biopsy is obtained. Furthermore, in one embodiment, detection of one or more antibodies is used for a diagnosis, prognosis or theranosis of a cancer, such as prostate cancer. In one embodiment, the method comprises detecting an expression level for one or more antibodies, wherein the expression level of the one or more antibodies is indicative of the presence, absence, or stage of the cancer. In another embodiment, the indication is whether the cancer is aggressive or indolent.
In one embodiment, a cancer is classified based on the detection of one or more antibodies to one or more polypeptide probes disclosed herein. In one embodiment, the cancer is classified as aggressive or malignant. In another embodiment, the cancer is classified as indolent or benign. Furthermore, after classification, detection of one or more antibodies from a sample from the subject can be used to select a treatment or therapeutic for the cancer.
The present disclosure is not limited to the embodiments described above, but is capable of modification within the scope of the appended claims. Those skilled in the art will recognize, or be able to ascertain using no more than routine experimentation, many equivalents of the specific embodiments of the present disclosure described herein.
Construction of T7 Phage Display Prostate Cancer cDNA Library
mRNA was isolated from total RNA following Novogen's Straight A's mRNA isolation protocol. OrientExpression cDNA synthesis and cloning system were used for the construction of T7 phage prostate cancer cDNA libraries.
To eliminate the 3′ bias inherent in oilgo(dT)-primed libraries, two libraries were constructed using directional oligo(dT) primer and random primer in parallel. After amplification, these two libraries were combined in same amount of titer.
Enrichment of Cancer Specific T7 Phage Library.
Protein A/G agarose beads (Pierce Biotechnology, Rockford, Ill.) were used to purify IgGs from the serum of prostate cancer patients. To enhance the selection of epitopes binding to IgGs specifically associated with prostate cancer, a dual procedure was performed.
First, a pre-clearing step was used to remove nonspecific clones by pre-absorbing the phage epitope libraries onto purified IgGs from normal serum pool from 10 control men. Next, the pre-cleared phage libraries were selected onto the pool of IgGs purified from the serum of 6 localized prostate cancer patients. In essence protein-A/G agarose beads provide a purification of the serum of IgGs. Fifty μl protein-A/G agarose beads were placed into 1.5 ml eppendorf tube and washed two times with 1× PBS. Washed beads were blocked with 4% nonfat milk at 4° C. for 1 hr. The beads were then incubated at 4° C. with 15 μl of pooled control sera at 1:30 dilution with 4% nonfat milk. After at least 2 hrs of incubation, the beads were washed three times with 1× PBS and then incubated with phage library (˜1010 phage particles) at 4° C. for at least 2 hrs. The mixture was centrifuged at 3000 rpm for 2 min. The beads with unspecifically bounded phage particles were discarded and the supernatant was collected for further immunoscreening.
Fifty μl fresh protein-A/G agarose beads were washed and blocked as same as above. The beads were then incubated at 4° C. for 3 hrs with 500 ml of PBS containing 15 ml patient sera pool at a 1:30 dilution. This amount of serum provides a three-fold molar excess of IgG to calculated number of protein-A/G binding capacity. The beads were washed three times with 1× PBS and then incubated with phage library supernatant from above allowed to react with the antibodies on the beads at 4° C. overnight. The mixture was centrifuged at 3000 rpm for 2 min and supernatant was discarded. The beads were then washed three times with 1× PBS.
To elute the bound phage 100 ml 1% SDS was used to strongly break up the antibody-antigen reaction without disrupting the T7 phage particles. The mixture of phage and elution buffer was incubated at room temperature for 10 min. The bound phages were removed from the beads by centrifugation at 8000 rpm for 8 min. Eluted phages were transferred to 10 ml BLT 5403 bacterial cells with OD600=0.6˜0.8 for amplification. Four or five cycles of affinity selections and biopanning were carried out with amplification of phage particles after each biopanning.
High Throughput Epitope Detection Using Phage Microarrays.
Random phage colonies were picked up and amplified in 96-well plates. Fresh phage lysates were spotted onto on FAST™ nitrocellulose coated glass slides (Schleicher & Schuell, Keene, N.H.). Extra T7 empty phage spots were spotted in quadruplicate as negative reference for normalizing the signal value from different slides. The arrays were dried overnight at room temperature. Before processing with serum, the arrays were rinsed briefly in a 4% nonfat milk/PBS with 0.1% tween-20 to remove unbound phage, then transferred immediately to 4% nonfat milk/PBS as a blocking solution for 1 hr at room temperature. Without allowing the array to dry, 2 ml of PBS containing human serum and T7-tag antibody (Novagen) at a dilution of 1:500 and 1:5000 respectively was applied to the surface in a screw-top slide hybridization tube.
The arrays were incubated at room temperature for 1 hour, and then washed gently three times in PBS/0.1% Tween-20 solution 10 min each. All washes were performed at room temperature. After washing, the arrays were incubated with 2 ml of PBS containing Cy3-labeled goat anti-mouse antibody and Cy5-labeled goat anti-human antibody (Jackson ImmunoResearch) at a dilution of 1:5,000 for both for 1 hr in the dark. Three washes were performed using PBS/0.1% Tween-20 solution with 10 min each. The arrays were then dried using a stream of compressed air and scanned using 532 nm and 635 nm lasers (Axon Laboratories).
Building Predictor and Validation of Biomarker Profile.
The arrays were quantified using GenePix software (Axon Laboratories). Raw ratios of each array were subtracted by median of ratios of the negative control spots with the observation that the signal for negative T7 empty phage on each chip correlates very well with the signal intensity for whole array. Then Z-transformation was applied to clones so that the mean of each clone is zero across arrays and the standard deviation is 1. Due to the fact a presence of antibodies specific to cancer was tested, epitopes with high reactivity in controls and low reactivity in patients were not expected. A GA/KNN algorithm, a machine learning language, was employed to calibrate the system. Briefly, the data set was randomly separated into a training set and a test set. In the training set, genetic algorithm (GA) was used to select optimized solutions (a subset of clones here) which had good fitness. The fitness was assessed by its ability to classify the training samples using the k-nearest neighbor (KNN) analysis (k=3 here). The fitness score was defined as the number of correctly classified training samples divided by the total number of training samples. The fitness score was specified to be equal or greater than 0.95. After getting 4000 optimized solutions, clones were ranked by their frequency in the solutions and top genes were used to predict the test samples. This cycle of sample partition, solution searching, clone ranking and test sample prediction was repeated 10 times and high-ranked clones were selected as optimized classifier.
This application claims the benefit of U.S. provisional application Ser. No. 61/314,750, filed Mar. 17, 2010, which is incorporated herein by reference in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| 61314750 | Mar 2010 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 13050544 | Mar 2011 | US |
| Child | 14822045 | US |
