Patent Application
20230192772
The invention relates to peptides endowed with an anti-inflammatory, anti-angiogenic and/or antimicrobial activity and the use thereof in the prevention or treatment of inflammatory and/or angiogenesis-related diseases.
Inflammation or the inflammatory reaction is a response to an attack of exogenous (infectious, injury-related cause) or endogenous (encounter with an “abnormal” or large quantity of an antigen, immunological cause, ischemia-reperfusion syndrome). It is involved in natural immunity in response to a danger signal as well as in the induction of the specific immune response and is hence associated with a very great variety of pathological scenarios (infections, systemic diseases, cancers, thromboembolic conditions). The inflammatory reaction, initially intended to protect the organism against external attacks, may give rise to harmful effects.
Thus, if the inflammation is inappropriate or becomes chronic, it may impair the structure as well as the function of the organ affected and must be treated.
In particular, the skin and mucous membranes are the site of numerous pathologies comprising an inflammatory component. Eczema and psoriasis are examples of dermatosis characterised by an inappropriate, excessive or chronic inflammatory reaction resulting in tissue lesions.
There are two major types of eczema. Contact dermatitis (or contact eczema) is due to sensitisation to haptens (molecules of low molecular weight) from day-to-day or professional life (heavy metals, solvents, etc.), which diffuse through the epidermis in contact with the skin surface, followed by an intense and inappropriate immune reaction according to a delayed cell-mediated hypersensitivity mechanism. Atopic dermatitis (AD or atopic eczema) is a chronic inflammatory disease combining innate skin barrier dysfunction and inflammation involving innate and adaptive immunity, particularly specific T lymphocytes targeted against environmental protein allergens (extrinsic or allergic AD) or against skin autoantigens (intrinsic or non-allergic AD). AD appears to be correlated with Staphylococcus aureus colonisation of the skin (Lin et al. 2007. Clinic Rev Allerg Immunol; 33:167-177). Psoriasis is a chronic inflammatory disease for which the exact cause is not known. A number of factors would appear to be involved in the onset of the disease, in particular genetic and environmental factors. Microorganisms could also be the cause of psoriasis (Munz et al. 2010. Arch Dermatol Res.; 302(7):495-8). On a cellular level, T lymphocytes appear to play a central role. A frequent complication of inflammatory dermatoses is impetiginisation, i.e. secondary infection of initially non-infected skin lesions, most frequently by streptococci or staphylococci.
The treatment of inflammatory dermatoses consists of boosting skin resistance using emollients and reducing inflammation and itching (pruritis) by the topical application of anti-inflammatory agents. Anti-inflammatory agents comprise steroidal anti-inflammatory drugs (cortisol or cortisone derivatives) and non-steroidal anti-inflammatory drugs (e.g. aspirin, ibuprofen), and compounds having an immunosuppressant activity. The anti-inflammatory agents most commonly used on the skin are dermal corticosteroids such as hydrocortisone or betamethasone. There are four categories of dermal corticosteroids distributed according to the intensity of the activity thereof (potency), from class I (very strong activity) to class IV (weak activity). The choice of the level of activity and dosage of the local corticosteroid is made according to the nature of the lesion, the sensitivity and age of the patient, and may require various adjustments during treatment. When used appropriately, the side-effects of dermal corticosteroids range from skin atrophy (reversible) to the onset of skin infections, requiring treatment discontinuation, and including corticosteroid-associated contact dermatitis.
Anti-inflammatory agents are contraindicated when the skin is infected or if it presents with ulcerations (wounds) and are avoided in cases of infectious dermatosis or of secondary infection of pre-existing dermatosis due to the risk of undetectable progression of the infectious disease, masked by an apparent favourable clinical effect. Thus, it is frequently recommended to treat any skin infection prior to the application of dermal corticosteroids, which complicates the treatment further.
There is therefore a need for novel active ingredients suitable for being used effectively for the prevention and/or treatment of inflammatory and/or infectious diseases, in particular inflammatory dermatoses, particularly cases due to or associated with an infection.
Antimicrobial peptides (AMPs) are defence peptides considered as one of the key elements of the innate immune system, which provides the first line of defence of multicellular organisms against pathogens. The interest for these peptides stems particularly from the broad spectrum of activity thereof. The mode of action thereof is based on a rapid permeabilization or fragmentation of the membranes of the microorganisms, unlikely to generate the onset of resistance mechanisms. Antimicrobial peptides have been identified in plants, insects, batrachians and mammals. The skin of batrachians is an important source of antimicrobial peptides and each frog species has its own peptide repertoire generally consisting of 10 to 15 AMPs.
The Hylidae form a family of amphibians comprising approximately 51 genera divided into three subfamilies: Pelodryadinae, Phyllomedusinae, and Hylinae. The Phyllomedusinae subfamily synthesises and secretes a great diversity of AMPS which have been classified into seven families: dermaseptins (17 peptides), phylloseptins (17 peptides), plasticins (6 peptides), dermatoxins (4 peptides), phylloxins (2 peptides), hyposins (5 peptides) and 4 orphan peptides (Amiche et al. 2008. Peptides; 29:2074- 2082).
The inventors discovered that a fraction of the secretions of Pachymedusa dacnicolor, a tree frog of the Phyllomedusinae subfamily, contains three forms of the same peptide which only differ from one another by the deletion of one or two residues from the C-terminus. The long form of this peptide corresponds to the sequence of a putative dermaseptin PD-2-2 identified from frog cDNA (Wechselberger. 1998. Biochimica et Biophysica Acta; 1388:279-283). The international application WO200055337 describes the use of AMPs, of which PD-2-2, for the manufacture of pathogen-resistant transgenic plants. The international application WO2007112069 describes the use of AMPS, of which PD-2-2, for reducing food consumption, particularly of patients subject to obesity.
In this context, the aim of the present invention is that of providing novel peptides endowed with an anti-inflammatory and/or antimicrobial activity, particularly for the treatment of inflammatory diseases, in particular inflammatory diseases due to or associated with an infection.
The present invention relates to a peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the peptide with an anti-inflammatory activity and/or antimicrobial activity has a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
In one embodiment, the peptide has a sequence selected from the group comprising SEQ ID NO: 5, SEQ ID NO: 6, SEQ ID NO: 7, SEQ ID NO: 8, SEQ ID NO: 9, SEQ ID NO: 10, SEQ ID NO: 11, SEQ ID NO: 12, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 15, SEQ ID NO: 16, SEQ ID NO: 17, SEQ ID NO: 18, SEQ ID NO: 19, SEQ ID NO: 20, SEQ ID NO: 21, SEQ ID NO: 26, SEQ ID NO: 27, SEQ ID NO: 28 and functional derivatives and pharmaceutically acceptable salts of this peptide.
The invention further relates to a peptide having a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
The present invention relates to a medicament comprising a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the medicament comprises a peptide having a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
The invention also relates to a pharmaceutical composition comprising at least one peptide as described above or a nucleotide sequence coding for at least one of these peptides, and one or a plurality of pharmaceutically acceptable excipients.
Another object of the invention is a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the peptide has a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
One aspect of the invention relates to a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the peptide has a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
In one embodiment, the peptide, medicament or pharmaceutical composition for use as described above, is characterised in that the inflammatory disease is due to an infection.
One aspect of the invention relates to a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the peptide has a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
The present invention further relates to the use of a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
The present invention further relates to the use of a peptide having a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
The present invention also relates to a kit comprising a peptide, a peptide for use, a medicament, or a pharmaceutical composition as described above, and optionally the instructions for administering the peptide, medicament, or pharmaceutical composition to said subject.
In the present invention, the terms “peptide”, “oligopeptide”, “polypeptide” or “protein” are used interchangeably and refer to a chain of amino acids linked by peptide bonds, regardless of the number of amino acid residues forming this chain. In the peptide sequences described in this document, the amino acids are represented by the one-letter or three-letter code thereof according to the following nomenclature: C: Cys, cysteine; D: Asp, aspartic acid; E: Glu, glutamic acid; F: Phe, phenylalanine; G: Gly, glycine; H: His, histidine; I: Ile, isoleucine; K: Lys, lysine; L: Leu, leucine; M: Met, methionine; N: Asn, asparagine; P: Pro, proline; Q: Gln, glutamine; R: Arg, arginine; S: Ser, serine; T: Thr, threonine; V: Val, valine; W: Trp, tryptophan and Y: Tyr, tyrosine.
The term “microorganism” or “microbial” as used in this document refers to bacteria, fungi, yeasts, viruses and/or parasites.
The term “microbial infection” as used in this document refers to an infection due to bacteria, fungi, yeasts, viruses and/or parasites.
The term “antimicrobial activity” as used in this document refers to an antibacterial, antiviral, antifungal and/or antiparasitic activity. This activity may be evaluated by means of the measurement of various parameters such as the IC50, the MIC or the MBC. The “IC50” or “median inhibitory concentration” corresponds to the concentration of a compound required to reduce the in vitro growth of a microorganism population by 50%. The “MIC” or “minimum inhibitory concentration” corresponds to the minimum concentration of compound suitable for inhibiting microbial growth completely, after 18 hours of incubation, in general at 37° C., in the presence of said compound. The “MBC” or “minimum bactericidal concentration” is the minimum concentration of compound suitable for destroying 99.9% of the microorganisms after 18 to 24 hours of contact with said compound.
The term “median lethal concentration” or “LC50” as used in this document refers to the concentration of compound causing the death of 50% of a cell population. The LC50 is a quantitative indicator of the toxicity of a compound. The LC50 is particularly used in this document to assess the cytotoxicity of AMPs, in particular on immune and erythrocyte cells. In one embodiment, the LC50 corresponds to the concentration of peptide inducing the death of 50% of immune cells. In a further embodiment, the LC50 corresponds to the concentration of peptide inducing the death of 50% of erythrocyte cells.
The term “anti-inflammatory activity” as used in this document refers to an activity aimed at inhibiting or reducing inflammation. Mention may be made by way of example of erythema, oedemas. Inflammation, in medical terms, is defined as the combination of the following four phenomena: swelling, redness, heat and pain.
The term “immunosuppressant activity” as used in this document refers to an activity aimed at attenuating or suppressing the immune reactions of the organism.
The term “pharmaceutically acceptable” refers only to the ingredients of a pharmaceutical composition that are mutually compatible and not harmful for the patient. In one embodiment, a pharmaceutically acceptable excipient does not produce any side-effect, allergic effect or other adverse reaction when administered to an animal, preferably a human. For human administration, the preparations must meet the standard sterility, pyrogenicity, general safety and purity requirements as stipulated by regulatory bodies, such as for example the FDA or EMA.
The term “subject” refers to an animal, including a human being. According to the present invention, a subject may be a patient, namely a person receiving medical care, undergoing or having undergone a medical treatment, or monitored for disease progression.
The term “treat” or “treatment” refers both to a therapeutic treatment and to prophylactic or preventive measures, wherein the objective is to prevent or slow down (reduce) the targeted pathological condition, or disorder. Those needing treatment include those already suffering from the disorder and those who are predisposed or susceptible to having it, and also those in whom the disorder is to be prevented. A subject or a mammal is “treated” successfully if, after having received a therapeutic dose of the peptide according to the present invention, the patient shows an observable and/or measurable reduction or an absence of one or more of the following elements: reduction in the number of pathogenic cells, reduction in the total percentage of pathogenic cells, and/or a certain relief of one or more of the symptoms associated with the targeted disease, reduced morbidity and mortality, and an improvement of quality of life. The above parameters for assessing the success of the treatment and the improvement of the disease status are readily measurable by means of routine procedures known to the practitioner.
The term “therapeutically effective dose” refers to the dose of therapeutic agent required and sufficient to slow down or stop the progression, worsening or deterioration or one of a plurality of symptoms of the disease or conditions; relieve the symptoms of the disease or condition; cure the disease or condition. In one embodiment, the condition according to the invention is an inflammatory disease, a microbial disease, or an inflammatory disease with an infectious component. In one embodiment, the condition according to the invention is an angiogenesis-related disease.
The invention firstly relates to a peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
,
or
.
In one embodiment, the peptide according to the invention does not comprise SEQ ID NO: 2.
In one embodiment, the peptide according to the invention does not comprise SEQ ID NO: 3.
In one embodiment, the peptide according to the invention does not comprise SEQ ID NO: 4.
According to one embodiment of the invention, the peptide according to the invention is not a peptide of sequence
According to one embodiment of the invention, the peptide according to the invention does not comprise the sequence SEQ ID NO: 36.
In one embodiment, φ is X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 32) and/or X9 and X10 represent no residue. In one embodiment, φ is X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 32) and X9 and X10 represent no residue.
In one embodiment, the peptide with an anti-inflammatory activity and/or antimicrobial activity has a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A (SEQ ID NO: 33), wherein:
In one embodiment, the peptide with an anti-inflammatory activity and/or antimicrobial activity has a sequence of 21 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A (SEQ ID NO: 34), wherein:
In one embodiment, the peptide with an anti-inflammatory activity and/or antimicrobial activity has a sequence of 26 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A (SEQ ID NO: 35), wherein:
In one embodiment, the peptide with an anti-inflammatory activity and/or antimicrobial activity has a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
In a preferred embodiment of the invention, the peptide according to the invention is endowed with an anti-inflammatory activity, an immunosuppressant activity, an anti-angiogenic activity and/or an antimicrobial activity.
In one embodiment of the invention, the peptide according to the invention is endowed with an antimicrobial activity. In a further embodiment of the invention, the peptide according to the invention is endowed with an anti-inflammatory activity. In a further embodiment of the invention, the peptide according to the invention is endowed with an immunosuppressant effect. In a further embodiment of the invention, the peptide according to the invention is endowed with an anti-angiogenic effect.
In a preferred embodiment of the invention, the peptide according to the invention is endowed with an anti-inflammatory activity and an antimicrobial activity. In a preferred embodiment of the invention, the peptide according to the invention is endowed with an anti-inflammatory activity and an immunosuppressant activity. In a preferred embodiment of the invention, the peptide according to the invention is endowed with an anti-inflammatory activity and an anti-angiogenic activity.
In a preferred embodiment of the invention, the peptide according to the invention is endowed with an anti-inflammatory activity, an immunosuppressant activity and an antimicrobial activity. In a preferred embodiment of the invention, the peptide according to the invention is endowed with an anti-inflammatory activity, an anti-angiogenic activity and an antimicrobial activity. In a preferred embodiment of the invention, the peptide according to the invention is endowed with an anti-inflammatory activity, an immunosuppressant activity and an anti-angiogenic activity. In a preferred embodiment of the invention, the peptide according to the invention is endowed with an immunosuppressant activity, an anti-angiogenic activity and an antimicrobial activity.
In a preferred embodiment of the invention, the peptide according to the invention is endowed with an anti-inflammatory activity, an immunosuppressant activity, an anti-angiogenic activity and an antimicrobial activity.
In a preferred embodiment of the invention, the residue X1 is W in SEQ ID NOs 1 and 29 to 32, the residue X2 is K in SEQ ID NOs 1 and 29 to 32, the residue X3 is L in SEQ ID NOs 1 and 29 to 32, the residue X4 is K or A in SEQ ID NOs 1 and 29 to 32, the residue X5 is V in the sequences SEQ ID NOs 1 and 29 to 32, the residue X6 is A in SEQ ID NOs 1 and 29 to 32, and/or the residue X7 is V in SEQ ID NOs 1, 29, 31 and 32. In a preferred embodiment of the invention, the residue X9 represents the E residue and the residue X10 represents the Q residue in SEQ ID NO 1.
In a further preferred embodiment of the invention, the residue X9 represents no amino acid in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X10 represents no amino acid in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X9 is E and the residue X10 is absent in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X9 represents the E residue and the residue X10 represents no amino acid in SEQ ID NO 1.
In a further preferred embodiment of the invention, the residues X9 and X10 represent no amino acid. Thus, in a preferred embodiment of the invention, the peptide according to the invention has a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N (SEQ ID NO: 25), wherein:
According to one embodiment, the peptide has a size between 17 and 100 amino acids, preferably between 17 and 50, between 17 and 45, between 17 and 40, between 17 and 35, or between 17 and 30 amino acids. According to a further embodiment, the peptide has a size between 17 and 34, between 17 and 33, between 17 and 32, or between 17 and 31 amino acids. According to one embodiment, the peptide has a size of 17 amino acids.
According to one embodiment, the peptide has a size between 21 and 100 amino acids, preferably between 21 and 50, between 21 and 45, between 21 and 40, between 21 and 35, or between 21 and 30 amino acids. According to a further embodiment, the peptide has a size between 21 and 34, between 21 and 33, between 21 and 32, or between 21 and 31 amino acids. According to one embodiment, the peptide has a size of 21 amino acids.
According to one embodiment, the peptide has a size between 26 and 100 amino acids, preferably between 26 and 50, between 26 and 45, between 26 and 40, between 26 and 35, or between 26 and 30 amino acids. According to a further embodiment, the peptide has a size between 26 and 34, between 26 and 33, between 26 and 32, or between 26 and 31 amino acids. According to one embodiment, the peptide has a size of 26 amino acids.
According to one embodiment, the peptide has a size between 29 and 100 amino acids, preferably between 29 and 50, between 29 and 45, between 29 and 40, between 29 and 35, or between 29 and 30 amino acids. According to a further embodiment, the peptide has a size between 29 and 34, between 29 and 33, between 29 and 32, or between 29 and 31 amino acids.
According to a further embodiment, the peptide has a size of 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34 or 35 amino acids. In a preferred embodiment, the peptide has a size of 29 amino acids.
The amino acids forming the peptide according to the invention may be of L or D configuration, preferably of L configuration. In one embodiment of the invention, the peptide according to the invention may contain a combination of amino acids of L configuration and of D configuration.
The peptide according to the invention may have a post-translational modification and/or a chemical modification in particular a glycosylation, an amidation, an esterification, an acylation, an acetylation or a methylation.
Indeed, so as to increase the bioavailability of the peptide by enhancing the peptidase resistance thereof, protecting groups may be added to the C- and/or N-termini. For example, the protecting group at the N-terminus may be an acylation or an acetylation and the protecting group at the C-terminus may be an amidation or an esterification. The action of proteases may also be impeded with the use of amino acids of D configuration, peptide cyclisation by the formation of disulphide bridges, lactam rings or bonds between the N- and C-termini. The peptide according to the invention may also comprise pseudopeptide bonds replacing “conventional” CONH peptide bonds and conferring an increased peptidase resistance, such as CHOH—CH2, NHCO, CH2—O, CH2CH2, CO—CH2, N—N, CH, CH2NH, and CH2—S. Preferably, the peptide according to the invention has an amidation of the C-terminus thereof.
According to one embodiment, the peptide according to the present invention consists of or comprises a sequence selected from the following group:
wherein the residues preceded by the letter “d” are amino acids of D configuration, and functional derivatives and pharmaceutically acceptable salts of said peptide.
In one embodiment, the peptide has a sequence comprising or consisting of the sequence SEQ ID NO: 5. In one embodiment, the peptide has a sequence comprising or consisting of the sequence SEQ ID NO: 6. In one embodiment, the peptide has a sequence comprising or consisting of the sequence SEQ ID NO: 7. In one embodiment, the peptide has a sequence comprising or consisting of the sequence SEQ ID NO: 8.
The invention also covers functional derivatives of a peptide according to the invention as described above. The term “functional derivative” as used in this document, refers to peptides having substantially the same amino acid sequence, substantially the same helical structure and substantially the same anti-inflammatory, anti-angiogenic and/or antimicrobial activity. Preferentially, the term “functional derivative” as used in this document, refers to peptides having substantially the same amino acid sequence, substantially the same helical structure and substantially the same anti-inflammatory and/or antimicrobial activity. These functional derivatives may be resistant to proteolysis by one or a plurality of chemical modification(s) or substantially homologous by one or a plurality of conservative replacement(s). These functional derivatives may be, for example, inverso peptides, retro peptides, retro-inverso peptides and peptides wherein the side chain of one or a plurality of the amino acids is substituted by groups that do not modify the anti-inflammatory and/or antimicrobial activity of the peptide according to the invention.
The invention also covers the pharmaceutically acceptable salts of a peptide according to the invention. The pharmaceutically acceptable salts may be, for example, salts with pharmaceutically acceptable mineral acids such as hydrochloric acid, hydrobromic acid, sulphuric acid and phosphoric acid; salts with pharmaceutically acceptable organic acids such as acetic acid, citric acid, maleic acid, malic acid, succinic acid, ascorbic acid and tartaric acid; salts with pharmaceutically acceptable mineral bases such as sodium, potassium, calcium, magnesium or ammonium salts; or salts with organic bases that have a salifiable nitrogen, commonly used in the pharmaceutical art. The methods for preparing these salts are well-known to those skilled in the art.
The peptide according to the invention may be obtained by conventional chemical synthesis (solid phase or liquid homogeneous phase) or by enzymatic synthesis (Kullman et al. 1987. Enzymatic peptide synthesis, CRC Press, Florida). It may also be obtained using the method consisting of culturing a host cell, as described hereinafter, comprising a transgene coding for the peptide and expressing said peptide, and extracting said peptide from these host cells or from the culture medium wherein the peptide has been secreted.
According to one embodiment, the peptide is an isolated peptide. In one embodiment, the peptide is a recombinant peptide.
The invention secondly relates to a nucleic acid coding for a peptide according to the first subject matter of the invention. According to the invention, “nucleic acid” denotes any DNA-or RNA-based molecule. This may consist of synthetic or semi-synthetic, recombinant molecules, optionally amplified or cloned in vectors, chemically modified, comprising non-natural bases or modified nucleotides comprising for example a modified bond, a modified puric or pyrimidic base, or a modified sugar. The nucleic acid according to the invention may be in single-stranded or double-stranded DNA and/or RNA form. According to a preferred embodiment, the nucleic acid is an isolated DNA molecule, synthesised using recombinant techniques well-known to those skilled in the art. The nucleic acid according to the invention may be deduced from the sequence of the peptide according to the invention and the use of the codons may be adapted according to the host cell wherein the nucleic acid is to be transcribed. These steps may be carried out according to methods well-known to those skilled in the art and some whereof are described in the reference manual of Sambrook et al. (Sambrook et al. 2001. In Vitro Cell. Dev. Biol.; 28P:97-105).
In one embodiment, the nucleic acid is the nucleic acid coding for an amino acid sequence selected from the group comprising or consisting of SEQ ID NO: 1, SEQ ID NO: 5, SEQ ID NO: 6, SEQ ID NO: 7, SEQ ID NO: 8, SEQ ID NO: 9, SEQ ID NO: 10, SEQ ID NO: 11, SEQ ID NO: 12, SEQ ID NO: 13, SEQ ID NO: 14, SEQ ID NO: 15, SEQ ID NO: 16, SEQ ID NO: 17, SEQ ID NO: 18, SEQ ID NO: 19, SEQ ID NO: 20, SEQ ID NO: 21, SEQ ID NO: 26, SEQ ID NO: 27, and SEQ ID NO: 28.
In one embodiment, the nucleic acid is selected from the group comprising or consisting of the sequences:
coding for the peptides of sequence SEQ ID NO: 7 and 8;
coding for the peptides of sequence SEQ ID NO: 3 and 6; and
coding for the peptides of sequence SEQ ID NO: 2 and 5, or any sequence having at least 75%, preferably at least 80, 85, 90, 95, 96, 97, 98 or 99% identity with one of the sequences SEQ ID NOs: 22-24.
According to the present invention, the term “identity”, when used in a relation between the sequences of two or a plurality of nucleotide sequences, refers to the degree of relationship between these nucleotide sequences, as determined by the number of matches between chains of two or more bases. According to the invention, the “identity” thus corresponds to a percentage of identity between two (or more than 2) sequences. This percentage is defined as the number of positions for which the bases are identical when the sequences are aligned optimally, divided by the total number of bases of the smaller of the two sequences. The differences between the sequences may be distributed at random and along the entire lengths thereof.
Two sequences are said to be optimally aligned when the identity percentage is maximum. Moreover, as will be obvious to those skilled in the art, it may be necessary to use additions of “gaps” so as to obtain an optimal alignment between the two sequences. The identity percentage between two nucleic acid sequences may therefore be determined by comparing these two optimally aligned sequences wherein the nucleic acid sequence to be compared may comprise additions or deletions with respect to the reference sequence for an optimal alignment between these two sequences. The identity percentage is then calculated by determining the number of identical positions for which the nucleotide is identical between the two sequences, by dividing this number of identical positions by the total number of positions in the comparison window and by multiplying the result obtained by 100 to obtain the identity percentage between these two sequences.
Preferentially, the methods for determining the identity are devised to give the greatest possible concordance between the compared sequences.
The identity percentage may be determined by a particular mathematical model or by a computer program (generally referred to as “algorithm”). Methods for computing the identity between nucleotide sequences are well-known to those skilled in the art. Non-limiting examples of such methods include those described in the following documents: Arthur M. Lesk, Computational Molecular Biology: Sources and Methods for Sequence Analysis (New-York: Oxford University Press, 1988); Douglas W. Smith, Biocomputing: Informatics and Genome Projects (New-York: Academic Press, 1993); Hugh G. Griffin and Annette M. Griffin, Computer Analysis of Sequence Data, Part 1 (New Jersey: Humana Press, 1994); Gunnar von Heinje, Sequence Analysis in Molecular Biology: Treasure Trove or Trivial Pursuit (Academic Press, 1987); Michael Gribskov and John Devereux, Sequence Analysis Primer (New York: M. Stockton Press, 1991); and Carillo et αl., 1988. SIAM J. Appl. Math. 48(5): 1073-1082.
Methods for determining the identity have been described in open-access computer programs. Preferred examples of methods using computer programs include, without being limited thereto, GCG software, including GAP (Devereux et αl., 1984. Nucl. Acid. Res. 12(1 Pt 1):387-395; Genetics Computer Group, University of Wisconsin Biotechnology Center, Madison, WI), BLASTP, BLASTN, and FASTA (Altschul et αl., 1990. J. Mol. Biol. 215(3):403-410). The BLASTX program is available from the National Center for Biotechnology Information (NCBI) and other sources (BLAST Manual, Altschul et αl. NCB/NLM/NIH Bethesda, Md. 20894; Altschul et αl., 1990. J. Mol. Biol. 215(3):403-410). The Smith-Waterman algorithm, which is well-known to those skilled in the art, may also be used to determine the identity percentage between two sequences.
The invention further relates to a vector or a plasmid wherein a nucleic acid according to the invention is associated with suitable elements for controlling transcription (in particular a promoter, an amplifier and optionally a terminator) and, optionally translation.
In one embodiment, the vector is a recombinant vector. In one embodiment, a nucleic acid according to the invention has been inserted into the vector. In one embodiment, the vector may be a cloning vector or an expression vector.
The invention also relates to a host cell expressing a peptide according to the invention, constitutively or transiently. In one embodiment, the host cell has been transformed by at least one of the nucleic acids according to the invention.
As used herein, the term “transformation” signifies the introduction of a gene, or of an RNA or DNA sequence (including plasmids and viral vectors) that is “extraneous” (i.e. extrinsic or extracellular) into a host cell, such that the host cell expresses the gene or the sequence introduced to produce the desired substance, typically a protein coded by the gene or the sequence. A host cell that receives and expresses the DNA or RNA introduced has been “transformed”.
The construction of the vectors according to the invention and the transformation of the host cells may be carried out using conventional molecular biology techniques.
The invention also relates to a peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the peptide according to the invention does not comprise SEQ ID NO: 2.
In one embodiment, the peptide for use as a medicament has a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A (SEQ ID NO: 33), wherein:
In one embodiment, the peptide for use as a medicament has a sequence of 21 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A (SEQ ID NO: 34), wherein:
In one embodiment, the peptide for use as a medicament has a sequence of 26 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A (SEQ ID NO: 35), wherein:
In one embodiment, the peptide for use as a medicament has a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein
In a preferred embodiment of the invention, the residue X1 is W in SEQ ID NOs 1 and 29 to 32, the residue X2 is K in SEQ ID NOs 1 and 29 to 32, the residue X3 is L in SEQ ID NOs 1 and 29 to 32, the residue X4 is K or A in SEQ ID NOs 1 and 29 to 32, the residue X5 is V in SEQ ID NOs 1 and 29 to 32, X6 is the A residue in SEQ ID NOs 1 and 29 to 32, and/or the residue X7 is V in SEQ ID NOs 1, 29, 31 and 32. In a preferred embodiment of the invention, the residue X9 represents the E residue and the residue X10 represents the Q residue in SEQ ID NO 1.
In a further preferred embodiment of the invention, the residue X9 represents no amino acid in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X10 represents no amino acid in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X9 is E and the residue X10 is absent in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X9 represents the E residue and the residue X10 represents no amino acid in SEQ ID NO 1.
In a further preferred embodiment of the invention, the residues X9 and X10 represent no amino acid.
The invention also relates to a medicament comprising at least one peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the peptide according to the invention does not comprise SEQ ID NO: 2.
In one embodiment, the medicament comprises at least one peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A (SEQ ID NO: 33), wherein:
In one embodiment, the medicament comprises at least one peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 21 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A (SEQ ID NO: 34), wherein:
In one embodiment, the medicament comprises at least one peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 26 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-V-X6-G-K-A-X7-L-N-A-V-T-N-X8-A (SEQ ID NO: 35), wherein:
In one embodiment, the medicament comprises at least one peptide with an anti-inflammatory and/or antimicrobial activity having a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
The present invention also relates to a composition comprising at least one peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the peptide according to the invention does not comprise SEQ ID NO: 2.
In one embodiment, the composition comprises at least one peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A (SEQ ID NO: 33), wherein:
In one embodiment, the peptide according to the invention does not comprise SEQ ID NO: 2.
In one embodiment, the composition comprises at least one peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 21 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X6-L-N-A (SEQ ID NO: 34), wherein:
In one embodiment, the peptide according to the invention does not comprise SEQ ID NO: 2.
In one embodiment, the composition comprises at least one peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 26 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A (SEQ ID NO: 35), wherein:
In one embodiment, the composition comprises at least one peptide comprising a peptide with an anti-inflammatory and/or antimicrobial activity having a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-XIO (SEQ ID NO: 1), wherein:
The invention also relates to a pharmaceutical composition comprising at least one peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the peptide according to the invention does not comprise SEQ ID NO: 2.
In one embodiment, the composition comprises at least one peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A (SEQ ID NO: 33), wherein:
In one embodiment, the pharmaceutical composition comprises at least one peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 21 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A (SEQ ID NO: 34), wherein:
In one embodiment, the pharmaceutical composition comprises at least one peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 26 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A (SEQ ID NO: 35), wherein:
In one embodiment, the pharmaceutical composition comprises at least one peptide comprising a peptide with an anti-inflammatory and/or antimicrobial activity having a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
The invention further relates to a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the peptide having a sequence of 17 to 100 amino acids comprising the sequence SEQ ID NO: 29 and functional derivatives and pharmaceutically acceptable salts of said peptide, is for use as an anti-inflammatory and/or immunosuppressant agent.
In one embodiment, the peptide having a sequence of 17 to 100 amino acids comprising the sequence SEQ ID NO: 29 and functional derivatives and pharmaceutically acceptable salts of said peptide, is for use as an anti-inflammatory and/or anti-angiogenic agent.
In one embodiment, the invention relates to a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A (SEQ ID NO: 33), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 21 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A (SEQ ID NO: 34), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 26 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A (SEQ ID NO: 35), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
In a preferred embodiment of the invention, the residue X1 is W in SEQ ID NOs 1 and 29 to 32, the residue X2 is K in SEQ ID NOs 1 and 29 to 32, the residue X3 is L in SEQ ID NOs 1 and 29 to 32, the residue X4 is K or A in SEQ ID NOs 1 and 29 to 32, the residue X5 is V in SEQ ID NOs 1 and 29 to 32, the residue X6 is A in SEQ ID NOs 1 and 29 to 32, and/or the residue X7 is V in SEQ ID NOs 1, 29, 31 and 32. In a preferred embodiment of the invention, the residue X9 represents the E residue and the residue X10 represents the Q residue in SEQ ID NO 1.
In a further preferred embodiment of the invention, the residue X8 represents no amino acid in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X10 represents no amino acid in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X9 is E and the residue X10 is absent in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X9 represents the E residue and the residue X10 represents no amino acid in SEQ ID NO 1.
In a further preferred embodiment of the invention, the residues X9 and X10 represent no amino acid.
In a preferred embodiment of the invention, the peptide for use as an anti-inflammatory, immunosuppressant and/or anti-angiogenic agent, is a peptide comprising a sequence selected from the group comprising or consisting of the sequences SEQ ID NOs: 2, 3, 4, 5, 6, 7 or 8.
In a preferred embodiment of the invention, the peptide for use as an anti-inflammatory and/or anti-angiogenic agent, is a peptide comprising a sequence selected from the group comprising or consisting of the sequences SEQ ID NOs: 2, 3, 4, 5, 6, 7 or 8.
In one embodiment, the peptide as described above is useful as an immunosuppressant agent. In a preferred embodiment of the invention, the peptide as described above is used as an immunosuppressant agent.
In another embodiment, the peptide as described above is useful as an anti-inflammatory agent. In a preferred embodiment of the invention, the peptide as described above is used as an anti-inflammatory agent.
In another embodiment, the peptide as described above is useful as an anti-angiogenic agent. In a preferred embodiment of the invention, the peptide as described above is used as an anti-angiogenic agent.
In another embodiment, the peptide as described above is useful as an anti-inflammatory, immunosuppressant and anti-angiogenic agent, preferably as an anti-inflammatory and immunosuppressant agent. In a preferred embodiment of the invention, the peptide as described above is used as an anti-inflammatory, immunosuppressant and anti-angiogenic agent, preferably as an anti-inflammatory and immunosuppressant agent.
In one embodiment, the invention relates to the peptide as described above for use in the prevention or treatment of an inflammatory disease, preferably a peptide having a sequence of 29 to 100 amino acids comprising SEQ ID NO: 1, preferably comprising a sequence selected from the group comprising or consisting of the sequences SEQ ID NOs: 2, 3, 4, 5, 6, 7 or 8.
The term “inflammatory disease” as used in this document refers to any disease wherein an inflammatory reaction has pathological consequences for the organism. Inflammatory diseases affect organs or tissues such as the digestive system, nervous system, skin, mucous membranes or joints, inter alia. Acute inflammatory disease according to the invention include for example septicaemia, septic shock. Chronic inflammatory diseases according to the invention include, but are not limited to, septicaemia, septic shock, auto-immune diseases (such as lupus or rheumatoid arthritis), inflammatory heart diseases (carditis, and particularly endocarditis, pericarditis, myocarditis, in particular endocarditis of infectious origin, such as cases induced by Staphylococcus aureus), graft rejection, injuries, inflammatory joint diseases (particularly the various types of arthritis), inflammatory gastrointestinal tract diseases (particularly colitis, enteritis, gastritis, gastro-enteritis, chronic inflammatory bowel diseases (CIBD) such as Crohn’s disease and haemorrhagic recto-colitis (HRC)), inflammatory skin diseases (particularly eczema, contact dermatitis, psoriasis, rosacea, dermatosis), inflammatory respiratory tract diseases (particularly asthma, chronic bronchitis), inflammatory eye diseases (particularly conjunctivitis, episcleritis, scleritis, keratitis, uveitis, blepharitis, hordeolum).
In an advantageous embodiment, the inflammatory disease is an inflammatory disease or the skin or mucous membranes, particularly chosen in the group comprising or consisting of:
In a preferred embodiment, the inflammatory disease according to the invention is selected from the group comprising or consisting of rosacea, psoriasis, eczema, contact dermatitis and impetigo.
In one particular embodiment of the invention, the inflammatory disease is due to or associated with an infection. In one embodiment, the inflammatory disease is an inflammatory disease with an infectious component.
In one embodiment, the inflammatory disease is due to or associated with at least one Gram+ or Gram- type bacterium. In a preferred embodiment of the invention, the infectious component of the inflammatory disease is due to or associated with at least one bacterium chosen among the Gram+ bacteria belonging to the Escherichia, Pseudomonas, Klebsiella, Salmonella, Yersinia, or Vibrio genus; and the Gram- bacteria belonging to the Staphylococcus, Listeria, Serratia or Kocuria genus.
In a preferred embodiment, the infectious component of the inflammatory disease is due to or associated with a bacterium belonging to the Staphylococcus genus, preferentially Staphylococcus aureus.
In one embodiment, the inflammatory disease is due to or associated with at least one fungus. In a preferred embodiment of the invention, the infectious component of the inflammatory disease is due to or associated with a fungus belonging to the Candida or Pityriasis genus.
The invention also relates to a pharmaceutical composition comprising at least one peptide as described above, and one or a plurality of pharmaceutically acceptable excipients, for use in the prevention and/or treatment of an inflammatory disease.
The invention also relates to a medicament comprising at least one peptide as described above for use in the prevention and/or treatment of an inflammatory disease.
Preferably, the composition, pharmaceutical composition or medicament according to the present invention comprise a therapeutically effective quantity of a peptide according to the invention.
In one embodiment, the peptide, composition, pharmaceutical composition or medicament according to the present invention is used in combination with at least one further therapeutic agent to treat an inflammatory disease.
Examples of further therapeutic agents for treating an inflammatory disease include, but are not limited to, nonsteroidal anti-inflammatory drugs (NSAIDs) such as aspirin, ibuprofen, diclofenac, naproxen and ketorolac, celecoxib; steroidal anti-inflammatory drugs such as prednisone, dexamethasone, betamethasone, hydrocortisone aceponate, clobetasol propionate; and monoclonal anti-inflammatories such as anti-TNF agents (for example adalimumab, golumumab).
In one particular embodiment, the invention relates to a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A (SEQ ID NO: 33), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 21 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A (SEQ ID NO: 34), wherein:
In one embodiment, the invention relates to a peptide with an anti-inflammatory activity and/or antimicrobial activity having a sequence of 26 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A (SEQ ID NO: 35), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
According to a particular form of the invention, the peptide as described above is suitable for use for the prevention or treatment of a disease, wherein the prevention or treatment consists of simultaneously obtaining the following effects:
The peptides according to the invention, when with an antimicrobial and anti-inflammatory activity, offer the advantage of being suitable for being administered to a patient suffering from an inflammatory disease due to or associated with an infection, without being liable to mask the signs of onset or worsening of an infection, unlike steroidal or nonsteroidal type anti-inflammatory drugs.
In one embodiment, the invention relates to a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A (SEQ ID NO: 33), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 21 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A (SEQ ID NO: 34), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 26 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-Xs-A (SEQ ID NO: 35), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
In a preferred embodiment of the invention, the residue X1 is W in SEQ ID NOs 1 and 29 to 32, the residue X2 is K in SEQ ID NOs 1 and 29 to 32, the residue X3 is L in SEQ ID NOs 1 and 29 to 32, the residue X4 is K or A in SEQ ID NOs 1 and 29 to 32, the residue X5 is V in SEQ ID NOs 1 and 29 to 32, the residue X6 is A in SEQ ID NOs 1 and 29 to 32, and/or the residue X7 is V in SEQ ID NOs 1, 29, 31 and 32. In a preferred embodiment of the invention, the residue X9 represents the E residue and the residue X10 represents the Q residue in SEQ ID NO 1.
In a further preferred embodiment of the invention, the residue X9 represents no amino acid in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X10 represents no amino acid in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X9 is E and the residue X10 is absent in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X9 represents the E residue and the residue X10 represents no amino acid in SEQ ID NO 1.
In a further preferred embodiment of the invention, the residues X9 and X10 represent no amino acid.
In one embodiment, the peptide for the prevention and/or treatment of a microbial infection is a peptide comprising a sequence selected from the group comprising or consisting of the sequences SEQ ID NOs: 2 to 8.
In one particular embodiment of the invention, the peptide as described above is suitable for use for the treatment of a bacterial infection due to a bacterium belonging to the genus: Escherichia, Pseudomonas, Klebsiella, Salmonella, Yersinia, Vibrio, Staphylococcus, Bacillus, Listeria, Enterococcus, Kocuria, Serratia, Enterobacter, or Micrococcus.
In an even more particular embodiment of the invention, the peptide as described above is suitable for use for the treatment of an infection at least caused by a bacterium selected from the group comprising but not limited to, Staphylococcus aureus, Escherichia coli, Klebsiella oxytoca, Klebsiella pneumoniae Yersinia ruckeri, Staphylococcus epidermidis, Kocuria rhizophila, Bacillus subtilis, Clostridium difficile, Acinetobacter baumanii, Pneumococci, Serratia marcescens, Enterobacter aerogenes, Enterobacter cloacae, and Yersenia pestis.
The peptide as described above is also suitable for use for the treatment of a fungal infection caused for example by a fungus belonging to the Candida, Tricophyton, Microsporum, Epidermophyton, or Aspergillus genus.
In one particular embodiment of the invention, the peptide as described above is suitable for use for the treatment of an infection at least caused by a fungus selected from the groups comprising but not limited to Candida albicans, Candida glabrata or Pityriasis versicolor.
The invention further relates to a medicament or a pharmaceutical composition comprising a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the invention relates to a medicament or a pharmaceutical composition comprising a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A (SEQ ID NO: 33), wherein:
In one embodiment, the invention relates to a medicament or a pharmaceutical composition comprising a peptide having a sequence of 21 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A (SEQ ID NO: 34), wherein:
In one embodiment, the invention relates to a medicament or a pharmaceutical composition comprising a peptide having a sequence of 26 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A (SEQ ID NO: 35), wherein:
In one embodiment, the invention relates to a medicament or a pharmaceutical composition comprising a peptide having a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
Furthermore, the invention relates to a peptide with an angiogenic activity having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A (SEQ ID NO: 33), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 21 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A (SEQ ID NO: 34), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 26 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-Xs-A (SEQ ID NO: 35), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
The formation of new blood vessels contributes to numerous malignant, ischemic, inflammatory, infectious and immune disorders. In a preferred embodiment, the invention relates to the peptide as described above for use in the prevention or treatment of an angiogenesis-related disease, preferably a peptide having a sequence of 29 to 100 amino acids comprising SEQ ID NO: 1, preferably comprising a sequence selected from the group comprising or consisting of the sequences SEQ ID NOs: 2, 3, 4, 5, 6, 7 or 8. Angiogenesis is a complex process whereby new vessels are formed, typically from the pre-existing vascular system. Angiogenesis plays an essential role in certain physiological processes such as the wound healing process. Besides the wound healing processes, numerous conditions have been described as having a component or a stage associated with the angiogenesis phenomenon.
The term “angiogenesis-related disease” as used in this document includes cancers, retinopathy type ophthalmological disorders (particularly retinopathies and macular degeneration), atherosclerosis, arthrosis, rheumatoid arthritis, psoriasis, or delayed healing-related conditions.
In one particular embodiment, the invention relates to a peptide, a pharmaceutical composition or a medicament as described above for the treatment of cancers, particularly for inhibiting tumour growth and/or metastasis formation in cancer patients. Indeed, it is established that angiogenesis is not merely essential for tumour growth but is also involved in progression from the benign stage to the invasive cancer stage. The possibility of inhibiting angiogenesis makes it possible to reduce tumour growth and metastatic cancer progression. Examples of cancers include, but are not limited to, cancers of the colon; lung; pancreas; breast; kidney such as renal cell carcinoma; skin such as basal cell carcinoma or melanoma; and glioblastoma. Advantageously, the peptide, pharmaceutical composition or medicament according to the invention are used to treat malignant tumours that induce new blood vessel formation.
The peptide, pharmaceutical composition or medicament according to the invention may be administered by injection, such as for example intravenous, intramuscular, subcutaneous injection, or directly into the tissue.
In one embodiment, the peptides according to the invention, regardless of the embodiment, are in a form acceptable for topical, systemic, oral, subcutaneous, intravitreal, intradermal, transdermal, intraperitoneal, intramuscular administration or administration by inhalation.
The pharmaceutical composition or medicament according to the invention may be in the form of tablets, capsules, hard capsules, granulates, suspensions, emulsions, solutions, gels, drops, pastes, ointments, creams, plasters, injectables, implants, patches.
The pharmaceutical composition or medicament according to the invention may comprise one or a plurality of pharmaceutically acceptable routine excipients.
In one embodiment, the composition, pharmaceutical composition or medicament according to the present invention comprises one or more pharmaceutically acceptable vehicles for a formulation suitable for topical administration. The pharmaceutically acceptable excipients may particularly be any excipient among those known to the those skilled in the art with a view to obtaining a composition for topical application in the form of a milk, cream, balm, oil, lotion, gel, foaming gel, ointment, or spray. In one particular embodiment, the excipients are chosen from the group consisting of an oil, fat, emulsion, gel, ointment, excipient based on nanoparticles or liposomes. The oils may particularly be chosen among silicone oils, mineral oils (paraffin, petrolatum, etc.) or vegetable oils and fats.
The pharmaceutical composition or medicament according to the invention may be prepared in the form of a water-in-oil (W/O) or oil-in-water (O/W) emulsion, a multiple emulsion such as for example, a water-in-oil-in-water (W/O/W) emulsion or an oil-in-water-in oil (O/W/O) emulsion, a micro-emulsion or in the form of a hydrodispersion or lipodispersion, gel or aerosol.
In a further embodiment, the composition, pharmaceutical composition or medicament according to the invention comprises one or more pharmaceutically acceptable vehicles for a formulation suitable for oral administration. Examples of forms suitable for oral administration include, but are not limited to, tablets (of which sustained-release tablets), hard capsules, powders, granules, pills (of which sugar-coated pills), capsules (of which soft gel capsules), oral suspensions, oral solutions, and other similar forms.
In one embodiment, the composition, the pharmaceutical composition or the medicament according to the present invention comprises one or more pharmaceutically acceptable vehicles for a formulation suitable for being injected. Examples of forms suitable for administration by injection include, but are not limited to, sterile aqueous solutions, dispersions, emulsions, suspensions, solid forms suitable for the preparation of solutions or suspensions by adding a liquid before use such as, for example, powders.
The pharmaceutical composition of the medicament according to the invention may also contain additives and formulation aids, such as emulsifiers, thickeners, gelling agents, water fixatives, spreading agents, stabilisers, colorants, fragrances and preservatives.
The doses are adjusted according to the effect sought and the condition targeted.
In one embodiment, the therapeutically effective quantity ranges from about 1 to 10000 mg/mL of peptide, composition, pharmaceutical composition or medicament according to the invention, preferably from about 5 to about 5000 mg/mL, preferably from about 10 to about 2000 mg/mL, preferably from about 20 to about 100 mg/mL of peptide, composition, pharmaceutical composition or medicament according to the invention.
In one embodiment, the therapeutically effective quantity ranges from about 1 to 10000 mg/g of peptide, composition, pharmaceutical composition or medicament according to the invention, preferably from about 5 to about 5000 mg/g, preferably from about 10 to about 2000 mg/g, preferably from about 20 to about 100 mg/g of peptide, composition, pharmaceutical composition or medicament according to the invention.
In one embodiment, the therapeutically effective quantity ranges from about 0.001 to 500 µM of peptide, composition, pharmaceutical composition or medicament according to the invention, preferably from about 0.01 to about 250 µM, preferably from about 0.1 to about 200 µM, preferably from about 0.5 to about 150 µM, composition, pharmaceutical composition or medicament according to the invention.
In one embodiment, the therapeutically effective quantity ranges from about 1 to 1000 µMof peptide, composition, pharmaceutical composition or medicament according to the invention, preferably from about 5 to about 500 µM, preferably from about 10 to about 250 µM, preferably from about 10 to about 150 µM, composition, pharmaceutical composition or medicament according to the invention.
In one embodiment, the therapeutically effective quantity ranges from about 1 to 100 µM of peptide, composition, pharmaceutical composition or medicament according to the invention, preferably from about 5 to about 75 µM, preferably from about 10 to about 50 µM.
In one embodiment, the therapeutically effective quantity ranges from about 10 to 1000 µMof peptide, composition, pharmaceutical composition or medicament according to the invention, preferably from about 50 to about 750 µM, preferably from about 100 to about 500 µM.
It is understood that the total daily use of peptide, composition, pharmaceutical composition or medicament according to the invention will be adjusted by the attending physician as part of their medical advice. The therapeutically effective dose specific to each patient will be dependent on a variety of factors including the disorder treated and the severity thereof; the activity of the compound used; the specific composition used; the age, weight, general state of health, sex and diet of the patient, the duration and method of administration; the duration of the treatment; the medicaments used in combination or coinciding with the compound used, and further similar factors known in the medical field. For example, it is common in this field to start with compound doses lower than the recommended doses to achieve the therapeutic effect sought and gradually increase the dosage until the effect has been achieved. However, the daily dosage of the compounds may vary over a vast range from about 1 to about 10000 mg per adult per day, preferably from about 5 to about 5000, preferably from about 10 to about 2000 mg, more preferentially from about 20 to about 100 mg per adult per day. Preferably, the composition comprises 1, 10, 20, 50, 100, 250, 500, 1000 and 2000 mg of the active ingredient for the symptomatic adjustment of the dosage to be administered to the patient to be treated. A medicament contains typically from about 1 to about 10000 mg of active ingredient, preferably from 5 to 5000, preferably from 10 to 2000 mg of active ingredient. An effective quantity of the medicament is ordinarily supplied at a dose ranging from about 0.01 mg/kg to about 100 mg/kg of body weight per day, preferably from about 0.05 mg/kg to about 40 mg/kg, preferably from about 0.1 mg/kg to 20 mg/kg of body weight per day, more preferentially from about 0.2 to about 1 mg/kg of body weight per day.
In one embodiment, the daily dose of the peptide according to the invention, the composition, pharmaceutical composition or medicament according to the present invention is adjusted according to the potential disorders at the level of the organs and systems, such as the kidney, liver and/or blood disorders of the patient.
In one embodiment, the peptide, the composition, pharmaceutical composition or medicament according to the present invention is administered to the subject at least once per day. For example, the peptide, composition, pharmaceutical composition or medicament according to the invention may be administered once per day, two times or three times per day. Preferably, the peptide, composition, pharmaceutical composition or medicament according to the invention is administered once per day. In a further embodiment, the peptide, composition, pharmaceutical composition or medicament according to the present invention is administered to the subject at least once per week. For example, the peptide, composition, pharmaceutical composition or medicament according to the invention may be administered once per week, two times, three times, four times or up to seven times per week.
The invention also relates to a method for the prevention and/or treatment of an inflammatory disease in a subject in need thereof, comprising the administration of an effective therapeutic dose of at least one peptide, medicament or pharmaceutical composition according to the invention.
In one embodiment, the method according to the invention for treating an inflammatory disease comprises the administration to the subject of a therapeutically effective quantity of a peptide according the invention as described above, preferably a peptide having a sequence of 29 to 100 amino acids comprising the sequence SEQ ID NO: 2, 3, 4, 5, 6, 7 or 8.
In one embodiment, the peptide, the composition, the pharmaceutical composition or the medicament according to the invention is administered to the subject.
In one embodiment, the peptide, the medicament or the pharmaceutical composition according to the invention is administered to a subject suffering or liable to suffer from an inflammatory disease. In one embodiment, the subject is an at-risk subject for the onset of an inflammatory disease.
In one embodiment, the subject has not yet been treated with another treatment for the inflammatory disease according to the invention. In a further embodiment, the subject has already been treated with another treatment for the inflammatory disease according to the invention.
The invention further relates to a method for the prevention and/or treatment of a microbial infection comprising the administration of an effective therapeutic dose of at least one peptide, medicament or pharmaceutical composition according to the invention.
In one embodiment, the method according to the invention for treating a microbial infection comprises the administration to the subject of a therapeutically effective quantity of a peptide according the invention as described above, preferably a peptide having a sequence of 29 to 100 amino acids comprising the sequence SEQ ID NO: 2, 3, 4, 5, 6, 7 or 8.
In one embodiment, the microbial infection is a bacterial or fungal infection as described above.
In one embodiment, the peptide, the medicament or pharmaceutical composition according to the invention is administered to a subject suffering or liable to suffer from a microbial infection. In one embodiment, the subject is an at-risk subject for the onset of a microbial infection.
In one embodiment, the subject has not yet been treated with another treatment for the microbial infection according to the invention. In a further embodiment, the subject has already been treated with another treatment for the microbial infection according to the invention.
The invention further relates to a method for the prevention and/or treatment of an angiogenesis-related disease comprising the administration of an effective therapeutic dose of at least one peptide, medicament or pharmaceutical composition according to the invention.
In one embodiment, the method according to the invention for treating an angiogenesis-related disease comprises the administration to the subject of a therapeutically effective quantity of a peptide according the invention as described above, preferably a peptide having a sequence of 29 to 100 amino acids comprising the sequence SEQ ID NO: 2, 3, 4, 5, 6, 7 or 8.
In one embodiment, the peptide, the medicament or the pharmaceutical composition according to the invention is administered to a subject suffering or liable to suffer from an angiogenesis-related disease. In one embodiment, the subject is an at-risk subject for the onset of an angiogenesis-related disease.
In one embodiment, the subject has not yet been treated with another treatment for the angiogenesis-related disease according to the invention. In a further embodiment, the subject has already been treated with another treatment for the angiogenesis-related disease according to the invention.
The invention further relates to the use of a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-φ (SEQ ID NO: 29), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 17 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A (SEQ ID NO: 30), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 21 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A (SEQ ID NO: 31), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 26 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A (SEQ ID NO: 32), wherein:
In one embodiment, the invention relates to a peptide having a sequence of 29 to 100 amino acids comprising the sequence A-L-X1-X2-T-L-X3-K-K-V-G-X4-X5-X6-G-K-A-X7-L-N-A-V-T-N-X8-A-N-Q-N-X9-X10 (SEQ ID NO: 1), wherein:
In a preferred embodiment of the invention, the residue X1 is W in SEQ ID NOs 1 and 29 to 32, the residue X2 is K in SEQ ID NOs 1 and 29 to 32, the residue X3 is L in SEQ ID NOs 1 and 29 to 32, the residue X4 is K or A in SEQ ID NOs 1 and 29 to 32, the residue X5 is a V residue in SEQ ID NOs 1 and 29 to 32, the residue X6 is A in SEQ ID NOs 1 and 29 to 32, and/or the residue X7 is V in SEQ ID NOs 1, 29, 31 and 32. In a preferred embodiment of the invention, the residue X9 represents the E residue and the residue X10 represents the Q residue in SEQ ID NO 1.
In a further preferred embodiment of the invention, the residue X9 represents no amino acid in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X10 represents no amino acid in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X9 is E and the residue X10 is absent in SEQ ID NO 1. In a preferred embodiment of the invention, the residue X9 represents the E residue and the residue X10 represents no amino acid in SEQ ID NO 1.
In a further preferred embodiment of the invention, the residues X9 and X10 represent no amino acid.
In one embodiment, the peptide as described above is suitable for use for the preparation of an antifungal or antibacterial formulation.
In one embodiment, the peptide as described above is particularly used for disinfecting surfaces (for example walls, doors, medical equipment), a liquid (for example water) or a gas (for example an anaesthetic gas).
The present invention also relates to a kit comprising a peptide according to the invention, a nucleic acid, a vector, a composition, a pharmaceutical composition or a medicament as described above.
According to one embodiment, the kit also comprises an apparatus for administering the peptide, nucleic acid, vector, composition, pharmaceutical composition or medicament to a subject.
According to one embodiment, the kit further comprises instructions for the administration of the peptide, nucleic acid, vector, composition, pharmaceutical composition or medicament to said subject.
In one embodiment, the kit comprises an additional therapeutic agent. According to one embodiment, the additional therapeutic agent is a further agent for the treatment of the inflammatory disease according to the invention. According to a further embodiment, the additional therapeutic agent is a further agent for the treatment of the microbial infection according to the invention.
The peptides used in the examples were synthesised with the FMOC/tBu strategy on solid substrate by an Activo P11 automatic synthesiser (Activotec). Purification is carried out by HPLC (Waters, C18 column) and peptide identity is verified by MALDI-TOF spectrometry (MS Voyager Applied Biosystems). Due to the presence of a tryptophan residue in the sequence, the concentrations of the solutions are determined by UV spectroscopy (Nanodrop, Labtech. Com).
The cytotoxic effects of DA2N (SEQ ID NO: 4) and DA2NEQ (SEQ ID NO: 2) were evaluated on mouse and human immune cells. In order to demonstrate that the cytotoxic effects are specific to immune cells, the cytotoxic effects were also evaluated on non-immune cells.
The mouse immune cells are obtained from C57BL6 mouse bone marrow. The human immune cells were purified from the whole blood of healthy donors (blood bank, IMSS, Cuernavaca, Mexico).
The following non-immune cells were extracted after sacrificing C57BL6 mice or in a surgical context: epithelial cells, adipocytes, hepatocytes.
The peptides are incubated at 37° C., 5% CO2 in the presence of 500,000 immune and non-immune cells in RPMI medium at varied concentrations and at varied times. Peptide-free cells are used as the negative control and cells incubated for 5 min at 50° C. or in the presence of DMSO (30%) are used as the positive control. After incubation, the cells are washed then labelled with propidium iodide so as to measure the cell viability. The cell viability is analysed by counting or with flow cytometry in the presence of antibodies coupled with fluorochromes corresponding to characteristic markers of each cell population. The LC50 is then calculated as being the concentration of DA2N and DA2NEQ peptides inducing the death of 50% of each one of the immune cell populations.
Cytometry data processing is carried out with FlowJo software.
The survival of mouse and human immune cells in the presence of increasing concentrations of DA2N and DA2NEQ is shown in
The survival of mouse and human non-immune cells in the presence of increasing concentrations of DA2N and DA2NEQ is shown in
By comparing the results shown in
Table 1 shows the DA2N and DA2NEQ peptide concentrations inducing the death of 50% of mouse and human immune cells (LC50).
Thus, these results demonstrate that the peptides according to the invention are endowed with an immunosuppressant activity.
The following strains were used for the antibacterial tests:
Escherichia coli (ATCC 8739, ATCC ML35p and P7 BLSE), Pseudomonas aeruginosa (ATCC 9027 and ATCC 27853), Klebsiella oxytoca (CIP 7932), Klebsiella pneumoniae (CIP 52.211), Salmonella enterica (CIP 8297), Yersinia ruckeri (ATCC 29473), Vibrio parahemolyticus (IFREMER 01 01/252), Staphylococcus aureus (ATCC 6538, ST 1065 and MRSA), Staphylococcus epidermidis (BM 3302), Listeria monocytogenes (SOR 100), Enterococcus faecalis (CIP A186, CIP 103015)), Kocuria rhizophila (ATCC 9341), Lactococcus garviae (ATCC 43921), Bacillus subtilis (CIP 52.65).
For each strain, a 5 ml pre-culture in LB medium is prepared by inoculating a colony of the bacterial strain of interest. The pre-culture is incubated at 37° C. under stirring overnight. The culture is subcultured (30 µL) in 5 mL. The culture concentration is evaluated by measuring the optical density at 620 nm. The concentration is adjusted by dilution so as to obtain a suspension with an OD of 0.05 at 620 nm.
The MIC is determined using a growth inhibition test in liquid medium. The MIC is defined as being the lowest peptide concentration capable of inhibiting the bacterial strain tested, after incubation for 18 h at 37° C. The test was carried out in a sterile microtitration plate containing 96 wells. A series of increasing concentrations of each peptide (0.2 to 100 µM) was prepared beforehand in sterile MilliQ water. In each well, 10 µL of peptide was incubated with 90 µL of bacterial suspension (107 cfu/mL) in yeast extract-free LB medium. The microplate was incubated at 37° C. for 18 h. The bacterial growth was evaluated by measuring the OD at 620 nm using a plate reader.
The negative growth inhibition control was obtained by replacing the solution containing the peptide by sterile MilliQ water. The positive control suitable for completely inhibiting the growth of the bacterial strains was obtained by replacing the solution containing the peptide by 10 µL of formaldehyde.
The results are interpreted by calculating the percentage of bacterial growth in each well according to the formula:
%Growth = (OD well - OD of T0)/(OD of T100-OD of T0)*100 where
The MBC is defined as being the minimum peptide concentration leaving no surviving bacteria of the inoculum after incubation at 37° C. for 24 hours. This test consists of smearing the contents of the well wherein the peptide has inhibited bacterial growth on a Petri dish (LB agar), followed by incubation for 24 h at 37° C. The inhibition is referred to as bacteriostatic when the peptide inhibits bacterial growth but does not lyse the bacteria and it is referred to as bacteriolytic when the peptide has completely lysed the bacteria and therefore prevents regrowth of the bacteria in the culture medium after subculturing.
The antimicrobial activity of DA2N and DA2NEQ was evaluated on various Gram-positive and Gram-negative reference bacterial strains. The results are shown in Table 2:
Escherichia coli ATCC 8739
Escherichia coli ML35p
Pseudomonas aeruginosa ATCC 9027
Klebsiella oxytoca CIP 7932
Klebsiella pneumoniae CIP 5211
Staphylococcus aureus ATCC 6538
Staphylococcus aureus ST 1065
Staphylococcus epidermidis BM 3302
Kocuria rhizophila ATCC 9341
Bacillus subtilis CIP 52.65
These results demonstrate that DA2N and DA2NEQ exhibit an antimicrobial activity on Gram-positive and Gram-negative bacteria. Note that the antimicrobial activity of DA2N is generally greater than that of DA2NEQ, particularly with respect to Escherichia coli P7 (ESBL). This result is of particular interest given that this strain is resistant to most β-lactamases.
The haemolytic activity of antimicrobial peptides was demonstrated using mouse or human red blood cells from healthy adult donors. Mouse or donor blood is washed three times in 10 volumes of PBS at 4° C. by centrifugation at 800 g for 10 minutes. The blood sediment is finally diluted to 4% (v/v) in PBS buffer. The test was carried out as follows: either 10 µM, or 50 µM of peptide was added to 100 µL of red blood cell suspension.
After 1h of incubation at 37° C. followed by centrifugation (800 g, 15 min), the absorbance of the supernatant was measured at 550 nm.
The negative control for this test (0% haemolysis) contains 5 µL of PBS buffer instead of the solution containing the peptide and the positive control (100% haemolysis) contains 5 µL of 1% Triton X100 instead of the solution containing the peptide.
Measurement of LC50
The mouse red blood cells are obtained from C57BL6 mouse bone marrow.
The human red blood cells were purified from the whole blood of healthy donors (blood bank, IMSS, Cuernavaca, Mexico).
The peptides are incubated at 37° C., 5% CO2 in the presence of 500,000 red blood cells in RPMI medium at varied concentrations and at varied times. Peptide-free cells are used as the negative control and cells incubated for 5 min at 50° C. or in the presence of DMSO (30%) are used as the positive control. The LC50 is then calculated as being the concentration of DA2N and DA2NEQ peptides inducing the death of 50% of the red blood cells.
Table 3 shows the DA2N and DA2NEQ peptide concentrations inducing the death of 50% of human and mouse red blood cells (LC50).
Thus, these results demonstrate that the peptides according to the invention have a negligible haemolytic activity.
The anti-inflammatory activity of DA2N and DA2NEQ was evaluated in a mouse model of non-infectious peritonitis. Non-infectious peritonitis is induced by intraperitoneal injection of thioglycolate 3%. Six hours after inducing peritonitis, three intraperitoneal injections of peptide (90 µg/injection/mouse) were carried out at regular intervals (every 6 h). At 36 h, the mice are sacrificed in order to observe the immune cell recruitment in the peritoneal cavity. The cells obtained from washing the peritoneal cavity are washed and then labelled with propidium iodide in order to measure the cell viability and in the presence of antibodies coupled with fluorochromes corresponding to characteristic markers of each cell population. The evaluation of the anti-inflammatory potential is based on the measurement of the number of neutrophils, monocytes and macrophages recruited in the mouse peritoneal cavity. The negative control with respect to the peptide for this test consists of 50 µL of 0.15 M NaCl instead of the solution containing the peptide. The peritonitis induction control consists of mice non-induced for peritonitis. Data processing is carried out with FlowJo software.
In the light of the in vitro results, the inventors consider, without wishing to be bound to any theory, that the reduction in recruitment observed is due to the death of the immune cells under the effect of the DA2N and DA2NEQ peptides.
The study is carried out to determine the activity of the peptides DA2N (SEQ ID NO: 4) and DA2NEQ (SEQ ID NO: 2) with respect to contact sensitisation. Mice are sensitised with DNCB 1% for 5 days. After this sensitization phase, 30 µL of a 1:1 olive oil/acetone mixture (vehicle) wherein 50 µg of DA2N or DA2NEQ peptide is dissolved is applied at the level of the ear. Five hours after applying the peptide, the contact reaction is induced by re-exposure to DNCB 1 % at the level of the ear. The intensity of the inflammatory reaction is evaluated locally 24, 48, 72 and 96 hours after re-exposure to DNCB by measuring ear thickness. Moreover, the number of immune cells (dendritic cells, T lymphocytes, neutrophils, monocytes, macrophages) is measured 24 h after re-exposure to DNCB in the ear at the level of the DNCB 1% application site (number of immune cells counted in both ears), in the blood (number of immune cells counted in 50 µL of blood) and in the bone marrow (number of immune cells counted in a tibia). The protocol is represented schematically in
In order to count the number of cells, the ears are digested by adding collagenase IV and the number of immune cells is determined by flow cytometry using antibodies coupled with fluorochromes corresponding to characteristic markers of each cell population. The negative contact reaction inhibition control was obtained by replacing the solution containing the peptide with the 1:1 olive oil/acetone solution (indicated as “vehicle” in
The results show a reduction in ear thickness (
The peptides according to the invention therefore have an anti-inflammatory effect in an in vivo inflammatory disease model.
The DA2N and DA2NEQ peptides were tested in an Imiquimod-induced psoriasis model described by Van der Fits (Van der Fits et al. 2009. Journal of immunology. 182(9):5836-5845) on female balb/c mice, aged 7 to 8 weeks.
31 mg of commercial cream containing 5% Imiquimod (Aldara, 3 M Pharmaceuticals) is applied topically on about 2.5 cm of the previously shaven ventral region of the mice for 6 days. The first psoriatic lesions appear on the 3rd day. The peptides resuspended in the cream are applied topically or intravenously (10 µg) for the first 3 days of Imiquimod treatment. Mice with no Imiquimod treatment and/or with no peptide application were used as controls. On the 6th day, the mice are sacrificed and the skin sampled is analysed by microscopy (skin lesions and angiogenesis).
The DA2N and DA2NEQ peptides were tested on the aortic ring model making it possible to study the influence of various molecules on new blood vessel formation. The aortas of C57BL/6 or Balb/c mice are sampled, washed with PBS then cut into rings. The rings are then deposited in a Matrigel matrix (BD® Matrigel™) in 24-well plates, incubated for 1h at 37° C., 5% CO2, before adding 1 mL of DMEM (DMEM Advanced 1X, Gibco) supplemented with 5% foetal calf serum (FCS), 2 µM of glutamine, 100 U of penicillin and 50 pg/mL of streptomycin. The rings are then incubated at 37° C., 5% CO2 for 3 days. The medium is then removed and replaced by medium containing or not the peptides at a concentration of 12.5 µM. The aortic rings are once again incubated for 3 days under the same conditions. Photos of the rings are taken each day to measure neo-vessel formation
Image processing and the measurement of the area formed by the neo-vessels are carried out using Image J 1.50i software.
The cytotoxic effects of DA2NE (SEQ ID NO: 3), DA2N (D) (SEQ ID NO: 19), K12A (SEQ ID NO: 11) and DANa (SEQ ID NO: 7) were evaluated on immune cells obtained from mouse bone marrow.
The mouse immune cells are obtained from C57BL/6 or Balb/c mouse bone marrow. The peptides are incubated at 37° C., 5% CO2 in the presence of 500,000 immune cells in RPMI medium at varied concentrations for 2 hours. Peptide-free cells are used as the negative control and cells in the presence of DMSO (30%) are used as the positive control. After incubation, the cells are washed then labelled with Trypan blue so as to measure the cell viability by microscope counting. The LC50 is then calculated as being the concentration of DA2N, K12A and DANa peptides inducing the death of 50% of the immune cells.
The survival of the immune cells obtained from mouse bone marrow in the presence of DA2NE, DA2N (D), K12A and DANa peptides at the concentrations of 12.5 and 25 µM is shown in
The survival of mouse non-immune cells in the presence of increasing concentrations of DA2N, K12A and DA2Na is shown in
The haemolytic activity of the antimicrobial peptides was measured as per the protocol described in part 3.1 of Example 3.
The antimicrobial activity of DA2N (SEQ ID NO: 4), DA2NEQ (SEQ ID NO: 2), DA2NE (SEQ ID NO: 3), DA2Na (SEQ ID NO: 7), K4D (SEQ ID NO: 13), L7A (SEQ ID NO: 14), K12A (SEQ ID NO: 11), K12P (SEQ ID NO: 12), V13A (SEQ ID NO: 17), A14D (SEQ ID NO: 10), A14K (SEQ ID NO: 8), M25A (SEQ ID NO: 16), DA2NEQ (D) (SEQ ID NO: 18) and DA2N (D) (SEQ ID NO: 19) was evaluated on various microbial strains.
ScrL (NLGAKNQVAWEKKAATTKGNVNLKLLQMVAV; SEQ ID NO: 37) and ScrC (KGNVLVKAAMLTKVLAKNKGVQNANALTW; SEQ ID NO: 38) are random sequences of the original peptides used as negative controls.
Melittin (CAS number: 37231-28-0) and Gramicidin (CAS number: 1405-97-6) are used as positive controls.
A 10 mL preculture in Muller-Hinton (MH) medium is prepared by inoculating a colony of the bacterial strain of interest. The preculture is incubated at 37° C. under stirring overnight. The culture is subcultured to 1:100 under the same conditions. The culture concentration is evaluated by measuring the turbidity at 600 nm (OD600 nm 1.0 = 5 × 108 CFU/mL for E. coli (Gram-negative bacteria) and 1.5 × 108 CFU/mL for S. aureus (Gram-positive bacteria). Once the exponential growth phase (OD600 nm = 0.3 - 0.7) has been achieved, the cultures are diluted in MH medium so as to obtain 106 CFU/mL (final inoculum concentration).
The MIC and the MBC were determined as per the protocol described in part 2.1 of Example 2.
The antimicrobial activity of DA2N and DA2NEQ is shown in Table 4:
Escherichia coli ATCC 8739
Escherichia coli K12
Escherichia coli ML35p
Escherichia coli P7 (ESBL)
Pseudomonas aeruginosa ATCC 9027
Pseudomonas aeruginosa ATCC 27853
Klebsiella pneumoniae CIP 52.211
Klebsiella oxytoca CIP 7932
Salmonella enterica CIP 8297
Yersinia ruckeri ATCC 29473
Vibrio parahemolyticus IFREMER 01/252
Staphylococcus aureus ATCC 6538
Staphylococcus aureus ST 1065
Staphylococcus epidermidis BM 3302
Staphylococcus aureus MRSA
Listeria monocytogenes SOR 100
Enterococcus faecalis CIP A186
Lactococcus garviae ATCC 43921
Enterococcus faecalis CIP 103015
Kocuria rhizophila ATCC 9341
Bacillus subtilis CIP 52.65
These results therefore confirm the results obtained in example 2 (Table 2) which demonstrate that DA2N and DA2NEQ have an antimicrobial activity on Gram-positive and Gram-negative bacteria.
The antimicrobial activity of DA2NE, DA2Na, K4D, L7A, K12A, K12P, V13A, A14D, A14K, M25A, DA2NEQ (D) and DA2N (D) is shown in Table 5:
E. coli ATCC 8739
P. aeruginosa ATCC 9027
S. aureus ATCC 6538
E. faecalis CIP 103015
These results demonstrate that the DA2NE, DA2Na, K4D, L7A, K12A, K12P, V13A, A14D, A14K, M25A, DA2NEQ (D) and DA2N (D) peptides also have an antimicrobial activity on Gram-positive and Gram-negative bacteria, compared to the control peptides Scr L, Scr C, Melittin and Gramicidin.
| Number | Date | Country | Kind |
|---|---|---|---|
| 1663231 | Dec 2016 | FR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/FR2017/053835 | 12/22/2017 | WO |
