US20140243506A1 - Antagonists of il17c for the treatment of inflammatory disorders - Google Patents

Antagonists of il17c for the treatment of inflammatory disorders Download PDF

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US20140243506A1
US20140243506A1 US14/351,162 US201214351162A US2014243506A1 US 20140243506 A1 US20140243506 A1 US 20140243506A1 US 201214351162 A US201214351162 A US 201214351162A US 2014243506 A1 US2014243506 A1 US 2014243506A1
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seq
antibody
il17c
hcdr3
antibody fragment
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Andreas Bültmann
Robert Mühlbacher
Teresa Garcia
Reginald Christophe Xavier Brys
Luc Nelles
Katja Conrath
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Galapagos NV
Morphosys AG
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/24—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against cytokines, lymphokines or interferons
    • C07K16/244—Interleukins [IL]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P11/00—Drugs for disorders of the respiratory system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P17/00—Drugs for dermatological disorders
    • A61P17/06—Antipsoriatics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P19/00—Drugs for skeletal disorders
    • A61P19/02—Drugs for skeletal disorders for joint disorders, e.g. arthritis, arthrosis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
    • A61K39/39533—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals
    • A61K39/3955—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals against proteinaceous materials, e.g. enzymes, hormones, lymphokines
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
    • C07K2317/21—Immunoglobulins specific features characterized by taxonomic origin from primates, e.g. man
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
    • C07K2317/33—Crossreactivity, e.g. for species or epitope, or lack of said crossreactivity
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
    • C07K2317/34—Identification of a linear epitope shorter than 20 amino acid residues or of a conformational epitope defined by amino acid residues
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/55—Fab or Fab'
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/76—Antagonist effect on antigen, e.g. neutralization or inhibition of binding
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/90—Immunoglobulins specific features characterized by (pharmaco)kinetic aspects or by stability of the immunoglobulin
    • C07K2317/92—Affinity (KD), association rate (Ka), dissociation rate (Kd) or EC50 value

Definitions

  • the present application relates to antagonists of IL17C for use in the treatment of inflammatory disorders, such as arthritis.
  • exemplary IL17C antagonists are IL17C-specific antibodies or fragments thereof, such as human anti-IL17C antibodies.
  • IL17C is a secreted disulfide-linked homodimer of the IL17 protein family. In vitro it has been shown that IL17C stimulates the release of TNF- ⁇ and IL-1 ⁇ from the monocytic cell line THP-1 (Li et al. (2000) Proc. Natl. Acad. Sci. U.S.A. 97, 773-8). IL17C can induce the mRNA expression of inflammatory cytokines such as IL-1 ⁇ , IL-6 and IL-23 in peritoneal exudates cells (PECS) and the 3T3 cell line (Yamaguchi et al. (2007) J. Immunol 179, 7128-36.
  • PECS peritoneal exudates cells
  • IL17C expression in normal tissue seems to be restricted to adult and fetal kidney.
  • the mRNA expression of IL17C in the arthritic paws of CIA mice is highly elevated.
  • Hwang et al. described IL17C expression in mononuclear cells of synovial fluid and peripheral blood of rheumatoid arthritis patients (Hwang & Kim (2005) Mol Cells 19, 180-184).
  • WO 99/060127 describes the cloning of IL17C (PRO1122).
  • WO 99/060127 loosely associated certain disorders with IL17C, including arthritis (e.g., osteoarthritis, rheumatoid arthritis, psoriatic arthritis), sepsis, ulcerative colitis, psoriasis, multiple sclerosis, type I diabetes, giant cell arthritis, systemic lupus erythematosus and Sjogren's syndrome. It is also contemplated that the compounds of WO 99/060127 may be used to treat various conditions, including those characterized by overexpression and/or activation of the disease-associated genes identified herein. However, no experimental proof is provided for this speculative function of IL17C. The same holds true for WO 2005/065711.
  • the present invention for the first time demonstrates in in vivo experiments that antagonists of IL17C are highly effective in the treatment of inflammatory disorders.
  • the present invention provides antagonists of IL17C for use in the treatment of an inflammatory disorder.
  • the inflammatory disorder treated with the antagonists of the present invention may be any inflammatory disorder selected from arthritis, such as rheumatoid arthritis, asthma, sepsis, an autoimmune disease, such as inflammatory bowel disease, COPD (chronic obstructive pulmonary disease), systemic lupus erythematosus (SLE) and sarcoidosis.
  • arthritis such as rheumatoid arthritis, asthma, sepsis
  • an autoimmune disease such as inflammatory bowel disease, COPD (chronic obstructive pulmonary disease), systemic lupus erythematosus (SLE) and sarcoidosis.
  • said inflammatory disorder is arthritis.
  • the antagonists of IL17C of the present invention may be any antagonist.
  • said antagonist is an antibody or antibody fragment, such as a monoclonal antibody.
  • Said antibody may be an antibody or fragment thereof specific for IL17C or an antibody or fragment thereof specific for the receptor of IL17C.
  • FIG. 1A shows the assay set up for a receptor interaction assay.
  • ECD fusion proteins of IL17 receptors were coated on a Multi-Array® 384-well plate. Biotinylated mouse IL17C was applied and detected via Streptavidin.
  • FIG. 1B shows results of the receptor interaction assay shown in FIG. 1A .
  • IL17C was clearly found to bind to mouse IL17RE/Fc, but not to mouse IL-17RB or another irrelevant receptor.
  • FIG. 1C shows results of the receptor interaction assay shown in FIG. 1A . None of the three prior art antibodies inhibits binding of mouse IL17C to mouse IL17RE/Fc.
  • FIG. 2 shows quality control results based on size exclusion chromatography (SEC).
  • FIG. 3 shows results of EC 50 determination in ELISA. All purified chimeric human-mouse chimeric IgG2a antibodies were titrated on mouse IL17C starting with a concentration of 100 nM.
  • FIG. 4 shows monovalent affinities of anti-IL17C antibodies. Affinities were determined by solution equilibrium titration (SET) using Fab fragments.
  • FIG. 5 shows IC 50 values determined in the IL-17 receptor E inhibition assay described in example 11.
  • FIG. 6 shows results of a mouse serum stability assay. 11 purified IgGs showed acceptable production yields and specific binding to mouse IL17C after 24 h incubation with mouse serum.
  • FIG. 7 shows the results of MOR12743 and MOR12762 administration on the clinical score in the treatment protocol of the mouse CIA model compared to vehicle, Enbrel® (etanercept) and a control antibody (MOR03207).
  • FIG. 8 shows the results of MOR12743 and MOR12762 administration on the AUC of the clinical score in the treatment protocol of the mouse CIA model compared to vehicle, Enbrel® (etanercept) and a control antibody (MOR03207).
  • FIG. 9 shows the results of MOR12762 administration on the Larsen score in the prophylaxis protocol of the mouse CIA model compared to a control antibody (MOR03207).
  • FIG. 10 shows the results of MOR12762 or MOR12743 administration on the recruitment of inflammatory cells into the BALF in a mouse model of acute lung neutrophilia compared to a control antibody (MOR03207).
  • FIG. 11 shows the results of IL17C expression profiling using qRT-PCR. Increased IL17C expression levels were detected in lung tissue samples derived from donors with diagnosed inflammatory respiratory diseases in comparison to IL17C expression levels in the control samples. Samples from 5 individual donors were analyzed for each group.
  • FIG. 12 shows effect of MOR1243 neutralizing antibodies on epidermal thickness in Imiquimod (IMQ) psoriasis-like mouse model.
  • FIG. 13A shows the results of quantitative RT-PCR analysis of IL17C mRNA expression in human epidermal keratinocytes treated for 2 h, 6 h, 24 h or 48 h with medium alone, IL-1 (10 ng/mL), TNF (10 ng/mL), IL-17A (250 ng/mL) or combinations of these triggers.
  • FIG. 13B shows results of quantitative RT-PCR analysis of IL-17C mRNA expression in human epidermal keratinocytes treated for 2 h, 6 h or 24 h with medium alone or various TLR ligands: TLR4 ligand LPS (1 ⁇ g/mL), TLR5 ligand flagellin (1 ⁇ g/mL), TLR7 ligand guardiquimod (4 ⁇ g/mL), TLR7/8 ligand CL097 (10 ⁇ g/mL) and TLR9 ligand CpG ODN 2116 (10 ⁇ M).
  • the present invention demonstrates that IL17C is a valid target for the treatment of inflammatory disorders.
  • the invention provides, in one aspect, methods of using an IL17C antagonist to bring about a prophylactic or therapeutic benefit in the treatment of inflammatory disorders.
  • the present invention provides therapeutic methods comprising the administration of a therapeutically effective amount of an IL17C antagonist to a subject in need of such treatment.
  • a “therapeutically effective amount” or “effective amount”, as used herein, refers to the amount of an IL17C antagonist necessary to elicit the desired biological response.
  • the therapeutic effective amount is the amount of an IL17C antagonist necessary to treat and/or prevent an inflammatory disorder.
  • inflammatory disorder or “inflammatory disease” are used interchangeably and as used herein refer to any abnormality associated with inflammation.
  • disorders associated with inflammation include acne vulgaris, arthritis, such as rheumatoid arthritis, asthma, autoimmune diseases, chronic prostatitis, COPD (chronic obstructive pulmonary disease), glomerulonephritis, hypersensitivities, inflammatory bowel diseases, pelvic inflammatory disease, reperfusion injury, sarcoidosis, transplant rejection, vasculitis, interstitial cystitis and sepsis.
  • Inflammatory disorders may be chronic or acute.
  • autoimmune diseases include ankylosing spondylitis, Crohn's Disease, Diabetes mellitus type I, gastritis, Guillain-Barré syndrome, idiopathic thrombocytopenic purpura, Lupus erythematosus, multiple sclerosis, psoriasis, psoratic arthritis, restless leg syndrome, rheumatoid arthritis, sarcoidosis, scleroderma, systemic lupus erythematosus and ulcerative colitis.
  • Arthritis can manifest itself as the primary form of a disease. This is for example the case for osteoarthritis, rheumatoid arthritis, septic arthritis, gout and pseudo-gout, juvenile idiopathic arthritis, Still's disease and ankylosing spondylitis. Other forms of arthritis are secondary to other disease, e.g.
  • Ehlers-Danlos syndrome sarcoidosis, Henoch-Schönlein purpura, psoriatic arthritis, reactive arthritis, haemochromatosis, hepatitis, Wegener's granulomatosis (and other vasculitis syndromes), Lyme disease, familial Mediterranean fever, hyperimmunoglobulinemia D with recurrent fever, TNF receptor associated periodic syndrome and inflammatory bowel disease (including Crohn's disease and ulcerative colitis).
  • pulmonary inflammation encompasses any inflammatory lung disease, acute chronic bronchitis, chronic obstructive lung disease, pulmonary fibrosis, Goodpasture's syndrome, and any pulmonary condition in which white blood cells may play a role including but not limited to idiopathic pulmonary fibrosis and any other autoimmune lung disease.
  • IL17C refers to a protein known as interleukin 17C (identified in HUGO Gene Nomenclature Committee (HGNC) by ID 5983 and in Mouse genome Informatics (MGI) database by ID 2446486). IL17C is some older publications referred to as CX2 or IL-21, however, it should not be confused with IL-21 cytokine, which is specifically expressed in activated CD4 + T cells, but not most of other tissues (Parrish-Novak et al (2000). Nature 408 (6808): 57-63). Human IL-21 is located on Chromosome 4 and is identified in HGNC database by ID 6005. Human IL17C is located on Chromosome 16 and has the amino acid sequence of (UniProt Q9P0M4):
  • IL17RA refers to a protein known as interleukin 17 receptor A. Human IL17RA has the amino acid sequence of (UniProt Q96F46):
  • IL17RE refers to a protein known as interleukin 17 receptor E.
  • Human IL17RE has the amino acid sequence of (UniProt Q8NFR9):
  • an “antagonist of IL17C” and an “IL17C antagonist”, as used herein, refer to IL17C antagonists in the broadest sense. Any molecule which inhibits the activity or function of IL17C, or which by any other way exerts an effect on IL17C is included.
  • the term IL17C antagonist includes, but is not limited to, antibodies or antibody fragments specifically binding to IL17C, inhibitory nucleic acids specific for IL17C or small organic molecules specific for IL17C. Also within the meaning of the term IL17C antagonist are antibodies or antibody fragments specifically binding to the receptor of IL17C, inhibitory nucleic acids specific for the receptor of IL17C or small organic molecules specific for the receptor of IL17C.
  • IL17C antagonist also refers to non-antibody scaffold molecules, such as fibronectin scaffolds, ankyrins, maxybodies/avimers, protein A-derived molecules, anticalins, affilins, protein epitope mimetics (PEMs) or the like.
  • non-antibody scaffold molecules such as fibronectin scaffolds, ankyrins, maxybodies/avimers, protein A-derived molecules, anticalins, affilins, protein epitope mimetics (PEMs) or the like.
  • Inhibitory nucleic acids include, but are not limited to, antisense DNA, triplex-forming oligonucleotides, external guide sequences, siRNA and microRNA.
  • Useful inhibitory nucleic acids include those that reduce the expression of RNA encoding IL17C by at least 20, 30, 40, 50, 60, 70, 80, 90 or 95 percent compared to controls.
  • Inhibitory nucleic acids and methods of producing them are well known in the art. siRNA design software is available.
  • SMOLs Small organic molecules specific for IL17C or the receptor of IL17C may be identified via natural product screening or screening of chemical libraries. Typically the molecular weight of SMOLs is below 500 Dalton, more typically from 160 to 480 Daltons. Other typical properties of SMOLs are one or more of the following:
  • the partition coefficient log P is in the range from ⁇ 0.4 to +5.6
  • the molar refractivity is from 40 to 130
  • the number of atoms is from 20 to 70
  • an IL17C antagonist for use in the present invention is an antibody specific for IL17C or specific for the receptor of IL17C.
  • Such an antibody may be of any type, such as a murine, a rat, a chimeric, a humanized or a human antibody.
  • a “human” antibody or functional human antibody fragment is hereby defined as one that is not chimeric (e.g., not “humanized”) and not from (either in whole or in part) a non-human species.
  • a human antibody or functional antibody fragment can be derived from a human or can be a synthetic human antibody.
  • a “synthetic human antibody” is defined herein as an antibody having a sequence derived, in whole or in part, in silico from synthetic sequences that are based on the analysis of known human antibody sequences. In silico design of a human antibody sequence or fragment thereof can be achieved, for example, by analyzing a database of human antibody or antibody fragment sequences and devising a polypeptide sequence utilizing the data obtained therefrom.
  • Another example of a human antibody or functional antibody fragment is one that is encoded by a nucleic acid isolated from a library of antibody sequences of human origin (i.e., such library being based on antibodies taken from a human natural source).
  • a “humanized antibody” or functional humanized antibody fragment is defined herein as one that is (i) derived from a non-human source (e.g., a transgenic mouse which bears a heterologous immune system), which antibody is based on a human germline sequence; or (ii) chimeric, wherein the variable domain is derived from a non-human origin and the constant domain is derived from a human origin or (iii) CDR-grafted, wherein the CDRs of the variable domain are from a non-human origin, while one or more frameworks of the variable domain are of human origin and the constant domain (if any) is of human origin.
  • a non-human source e.g., a transgenic mouse which bears a heterologous immune system
  • chimeric wherein the variable domain is derived from a non-human origin and the constant domain is derived from a human origin
  • CDR-grafted wherein the CDRs of the variable domain are from a non-human origin, while one or more frameworks
  • chimeric antibody or functional chimeric antibody fragment is defined herein as an antibody molecule which has constant antibody regions derived from, or corresponding to, sequences found in one species and variable antibody regions derived from another species.
  • the constant antibody regions are derived from, or corresponding to, sequences found in humans, e.g. in the human germ line or somatic cells
  • the variable antibody regions e.g. VH, VL, CDR or FR regions
  • VH, VL, CDR or FR regions are derived from sequences found in a non-human animal, e.g. a mouse, rat, rabbit or hamster.
  • antigen binding can be performed by “fragments” of an intact antibody.
  • antibody fragment encompassed within the term “antibody fragment” of an antibody include a Fab fragment, a monovalent fragment consisting of the VL, VH, CL and CH1 domains; a F(ab)2 fragment, a bivalent fragment comprising two Fab fragments linked by a disulfide bridge at the hinge region; an Fd fragment consisting of the VH and CH1 domains; an Fv fragment consisting of the VL and VH domains of a single arm of an antibody; a single domain antibody (dAb) fragment (Ward et al., (1989) Nature 341:544-546), which consists of a VH domain; and an isolated complementary determining region (CDR).
  • Fab fragment a monovalent fragment consisting of the VL, VH, CL and CH1 domains
  • F(ab)2 fragment a bivalent fragment comprising two Fab fragments linked by a disulfide bridge at the hinge region
  • a “single chain Fragment (scFv)” is a single protein chain in which the VL and VH regions pair to form monovalent molecules (known as single chain Fv (scFv); see, e.g., Bird et al., (1988) Science 242:423-426; and Huston et al., (1988) Proc. Natl. Acad. Sci. 85:5879-5883).
  • scFv single chain Fv
  • the two domains VL and VH are coded for by separate genes, they can be joined, using recombinant methods, by an artificial peptide linker that enables them to be made as a single protein chain.
  • Such single chain antibodies include one or more antigen binding moieties. These antibody fragments are obtained using conventional techniques known to those of skill in the art, and the fragments are screened for utility in the same manner as are intact antibodies.
  • isolated refers to a compound which can be e.g. an antibody or antibody fragment that is substantially free of other antibodies or antibody fragments having different antigenic specificities. Moreover, an isolated antibody or antibody fragment may be substantially free of other cellular material and/or chemicals.
  • monoclonal antibody refers to a preparation of antibody molecules of single molecular composition.
  • a monoclonal antibody composition displays a unique binding site having a unique binding specificity and affinity for particular epitopes.
  • an antibody “binds specifically to”, “specifically binds to”, is “specific to/for” or “specifically recognizes” an antigen (here, IL17C or, alternatively, the receptor of IL17C) if such antibody is able to discriminate between such antigen and one or more reference antigen(s), since binding specificity is not an absolute, but a relative property.
  • the reference antigen(s) may be one or more closely related antigen(s), which are used as reference points, e.g. IL17A or IL17B.
  • “specific binding” is referring to the ability of the antibody to discriminate between the antigen of interest and an unrelated antigen, as determined, for example, in accordance with one of the following methods.
  • Such methods comprise, but are not limited to Western blots, ELISA-, RIA-, ECL-, IRMA-tests and peptide scans.
  • a standard ELISA assay can be carried out.
  • the scoring may be carried out by standard color development (e.g. secondary antibody with horseradish peroxide and tetramethyl benzidine with hydrogen peroxide).
  • the reaction in certain wells is scored by the optical density, for example, at 450 nm.
  • determination of binding specificity is performed by using not a single reference antigen, but a set of about three to five unrelated antigens, such as milk powder, BSA, transferrin or the like.
  • “specific binding” may relate to the ability of an antibody to discriminate between different parts of its target antigen, e.g. different domains or regions of IL17C or the receptor of IL17C, or between one or more key amino acid residues or stretches of amino acid residues of IL17C or the receptor of IL17C.
  • Cross-competes means the ability of an antibody, antibody fragment or other antigen-binding moieties to interfere with the binding of other antibodies, antibody fragments or antigen-binding moieties to a specific antigen in a standard competitive binding assay.
  • the ability or extent to which an antibody, antibody fragment or other antigen-binding moieties is able to interfere with the binding of another antibody, antibody fragment or antigen-binding moieties to a specific antigen, and, therefore whether it can be said to cross-compete according to the invention, can be determined using standard competition binding assays.
  • One suitable assay involves the use of the Biacore technology (e.g.
  • Cross-competition is present if the antibody or antibody fragment under investigation reduces the binding of one of the antibodies described in Table 1 to IL17C by 60% or more, specifically by 70% or more and more specifically by 80% or more and if one of the antibodies described in Table 1 reduces the binding of said antibody or antibody fragment to IL17C by 60% or more, specifically by 70% or more and more specifically by 80% or more.
  • epitope includes any proteinacious region which is specifically recognized by an immunoglobulin or T-cell receptor or otherwise interacts with a molecule.
  • epitopes are of chemically active surface groupings of molecules such as amino acids or carbohydrate or sugar side chains and generally may have specific three-dimensional structural characteristics, as well as specific charge characteristics. As will be appreciated by one of skill in the art, practically anything to which an antibody can specifically bind could be an epitope.
  • An epitope can comprise those residues to which the antibody binds and may be “linear” or “conformational.”
  • linear epitope refers to an epitope wherein all of the points of interaction between the protein and the interacting molecule (such as an antibody) occur linearly along the primary amino acid sequence of the protein (continuous).
  • formational epitope refers to an epitope in which discontinuous amino acids that come together in three dimensional conformations. In a conformational epitope, the points of interaction occur across amino acid residues on the protein that are separated from one another.
  • “Binds the same epitope as” means the ability of an antibody, antibody fragment or other antigen-binding moiety to bind to a specific antigen and having the same epitope as the exemplified antibody.
  • the epitopes of the exemplified antibody and other antibodies can be determined using epitope mapping techniques.
  • Epitope mapping techniques are well known in the art. For example, conformational epitopes are readily identified by determining spatial conformation of amino acids such as by, e.g., hydrogen/deuterium exchange, x-ray crystallography and two-dimensional nuclear magnetic resonance.
  • an “immunoglobulin” hereby is defined as a protein belonging to the class IgG, IgM, IgE, IgA, or IgD (or any subclass thereof), and includes all conventionally known antibodies and functional fragments thereof.
  • a “functional fragment” of an antibody/immunoglobulin hereby is defined as a fragment of an antibody/immunoglobulin (e.g., a variable region of an IgG) that retains the antigen-binding region.
  • an “antigen binding region” of an antibody typically is found in one or more hypervariable region(s) of an antibody, i.e., the CDR-1, -2, and/or -3 regions; however, the variable “framework” regions can also play an important role in antigen binding, such as by providing a scaffold for the CDRs.
  • the “antigen-binding region” comprises at least amino acid residues 4 to 103 of the variable light (VL) chain and 5 to 109 of the variable heavy (VH) chain, more preferably amino acid residues 3 to 107 of VL and 4 to 111 of VH, and particularly preferred are the complete VL and VH chains (amino acid positions 1 to 109 of VL and 1 to 113 of VH; numbering according to WO 97/08320).
  • a preferred class of immunoglobulins for use in the present invention is IgG.
  • “Functional fragments” of the invention include the domain of a F(ab′)2 fragment, a Fab fragment, scFv or constructs comprising single immunoglobulin variable domains or single domain antibody polypeptides, e.g. single heavy chain variable domains or single light chain variable domains.
  • the F(ab′)2 or Fab may be engineered to minimize or completely remove the intermolecular disulphide interactions that occur between the CH1 and CL domains.
  • An antibody of the invention may be derived from a recombinant antibody library that is based on amino acid sequences that have been designed in silico and encoded by nucleic acids that are synthetically created.
  • silico design of an antibody sequence is achieved, for example, by analyzing a database of human sequences and devising a polypeptide sequence utilizing the data obtained therefrom.
  • Methods for designing and obtaining in silico-created sequences are described, for example, in Knappik et al., J. Mol. Biol. (2000) 296:57; Krebs et al., J. Immunol. Methods. (2001) 254:67, Rothe et al., J. Mol. Biol. (2008) 376:1182; and U.S. Pat. No. 6,300,064 issued to Knappik et al., which are hereby incorporated by reference in their entirety.
  • IL17C Any antibody specific for IL17C may be used with the present invention.
  • exemplary antibodies include antibodies in the prior art, such as
  • A rat IgG 2A monoclonal anti-mouse IL17C antibody (R&D Systems; clone 311522, # MAB23061), B: rat IgG 2A monoclonal anti-mouse IL17C antibody (R&D Systems; clone 311523,# MAB2306), and C: rat anti-mouse IL17C (US Biological; clone: 8B28, I#8439-20R3) (take from Example 4).
  • antibodies that may be used to practice the present invention include the anti-IL17C antibodies available from Abnova (Walnut, Calif., USA; Catalog #H00027189-B01P, #H00027189-D01 and #H00027189-D01P) and the anti-IL17C antibodies available from antibodies-online GmbH (Aachen, Germany; Catalog #ABIN525892, #ABIN327411, #ABIN525893, #ABIN221340, #ABIN221341, #ABIN221342 and #ABIN525891).
  • Other antibodies specific for IL17C that may be used with the present invention are those isolated and described in the present invention itself, i.e. those listed in Table 1.
  • compositions of the invention may be used for therapeutic or prophylactic applications.
  • the invention therefore, includes a pharmaceutical composition containing an inventive antibody (or functional antibody fragment) and a pharmaceutically acceptable carrier or excipient therefor.
  • the invention provides a method for treating an inflammatory disorder. Such method contains the steps of administering to a subject in need thereof an effective amount of the pharmaceutical composition that contains an inventive antibody as described or contemplated herein.
  • the present invention provides methods for the treatment of an inflammatory disorder in a subject, said method comprising the step of administering an IL17C antagonist to said subject.
  • Subject refers to any mammal, including rodents, such as mouse or rat, and primates, such as cynomolgus monkey ( Macaca fascicularis ), rhesus monkey ( Macaca mulatta ) or humans ( Homo sapiens ).
  • the subject is a primate, most preferably a human.
  • the present invention provides methods for the treatment of an inflammatory disorder, said method comprising the step of administering to a subject an IL17C antagonist, wherein said IL17C antagonist can bind to IL17C with an affinity of about less than 100 nM, more preferably less than about 60 nM, and still more preferably less than about 30 nM.
  • IL17C antagonist can bind to IL17C with an affinity of less than about 10 nM, and more preferably less than about 3 nM.
  • said IL17C antagonist is an antibody or antibody fragment specific for IL17C and said antibody or antibody fragment is cross-reactive with IL17C of another species, such as IL17C from mouse, rat, rhesus monkey and/or cynomolgus monkey.
  • said IL17C antibody or antibody fragment is an isolated antibody or antibody fragment specific for IL17C.
  • said isolated antibody or antibody fragment specific for IL17C is a monoclonal antibody or antibody fragment.
  • said isolated monoclonal antibody or antibody fragment is an isolated monoclonal antibody specific for a polypeptide comprising the amino acid sequence of SEQ ID No.: 181.
  • said isolated monoclonal antibody or antibody fragment is an isolated monoclonal antibody specific for a polypeptide consisting of the amino acid sequence of SEQ ID No.: 181.
  • said isolated monoclonal antibody or antibody fragment is cross-reactive with IL17C of another species, such as IL17C from mouse, rat, rhesus monkey and/or cynomolgus monkey.
  • said antibody or antibody fragment specific for IL17C is a human, humanized or chimeric antibody. In certain aspects, said antibody or antibody fragment specific for IL17C is a human synthetic antibody. In certain aspects the present invention provides an isolated monoclonal antibody or antibody fragment specific for a polypeptide comprising the amino acid sequence of SEQ ID No.: 181 wherein said antibody or antibody fragment is a human, humanized or chimeric antibody. In certain aspects the present invention provides an isolated monoclonal antibody or antibody fragment specific for a polypeptide consisting of the amino acid sequence of SEQ ID No.: 181 wherein said antibody or antibody fragment is a human, humanized or chimeric antibody. In certain aspects, said antibody or antibody fragment specific for a polypeptide consisting of the amino acid sequence of SEQ ID No.: 181 is a human synthetic antibody or antibody fragment.
  • the present invention provides a composition comprising an IL17C antagonist capable of antagonizing IL17C in an inflammatory disorder, said composition further comprising one or more pharmaceutically acceptable carriers and/or diluents.
  • antagonists of IL17C such as antibodies specific for IL17C, may antagonize any of the roles of IL17C in an inflammatory disorder.
  • the present invention provides a method for the prophylaxis of an inflammatory disorder in a subject, said method comprising administering an IL17C antagonist to said subject.
  • “Prophylaxis” as used in this context refers to methods which aim to prevent the onset of a disease or which delay the onset of a disease.
  • the present invention provides a composition comprising an IL17C antagonist useful in the treatment of an inflammatory disorder, said composition further comprising one or more pharmaceutically acceptable carriers and/or diluents.
  • the present invention provides IL17C antagonists for use in the treatment of an inflammatory disorder.
  • the present invention provides the use of an IL17C antagonist in the preparation of a medicament for the treatment of an inflammatory disorder.
  • the present invention provides a method for the treatment of an inflammatory disorder in a subject, comprising administering to the subject an antagonist of IL17C.
  • the IL17C antagonists of the present invention are administered subcutaneously. In other aspects, the IL17C antagonists of the present invention are administered intra-venously, intra-articularly or intra-spinally.
  • compositions of the present invention are preferably pharmaceutical compositions comprising an IL17C antagonist and a pharmaceutically acceptable carrier, diluent or excipient, for the treatment of an inflammatory disorder.
  • a pharmaceutically acceptable carrier, diluent or excipient for the treatment of an inflammatory disorder.
  • Such carriers, diluents and excipients are well known in the art, and the skilled artisan will find a formulation and a route of administration best suited to treat a subject with the IL17C antagonists of the present invention.
  • the present invention provides a method for the treatment or prophylaxis of an inflammatory disorder in a subject, comprising the step of administering to the subject an effective amount of an antagonist of IL17C.
  • said subject is a human.
  • said subject is a rodent, such as a rat or a mouse.
  • said antagonist of IL17C is an antibody or antibody fragment specific for IL17C. In certain aspects said antagonist is an antibody or antibody fragment specific for a polypeptide comprising the amino acid sequence of SEQ ID No.: 181. In alternative aspects, said antagonist of IL17C is an antibody or antibody fragment specific for the receptor of IL17C.
  • said antibody or antibody fragment specific for IL17C blocks the binding of IL17C to the receptor of IL17C. In alternative aspects, said antibody or antibody fragment specific for the receptor of IL17C blocks the binding of IL17C to the receptor of IL17C.
  • said antibody or antibody fragment specific for IL17C blocks the binding of IL17C to the receptor of IL17, wherein said receptor is IL17RE. In alternative aspects, said antibody or antibody fragment specific for the receptor of IL17C blocks the binding of IL17C to IL17RE.
  • said antibody or antibody fragment specific for IL17C blocks the binding of IL17C to IL17RE with an IC 50 concentration of less than 100 nM, 90 nM, 80 nM, 70 nM, 60 nM, 50 nM, 40 nM, 30 nM, 20 nM, 10 nM, 9 nM, 8 nM, 7 nM, 6 nM, 5 nM, 4 nM, 3 nM, 2 nM, 1 nM, 100 pM, 90 pM, 80 pM, 70 pM, 60 pM, 50 pM, 40 pM, 30 pM, 20 pM, 10 pM, 9 pM, 8 pM, 7 pM, 6 pM, 5 pM, 4 pM, 3 pM, 2 pM or 1 pM.
  • the IC 50 concentration can be determined by ELISA; SET, FACS or MSD (Mes)
  • said antibody or antibody fragment specific for IL17C blocks the binding of IL17C to one or more receptors of IL17C. In alternative aspects, said antibody or antibody fragment specific for the receptor of IL17C blocks the binding of IL17C to receptors of IL17C, wherein the receptors of IL17 include IL17RE and IL17RA. In alternative aspects, said antibody or antibody fragment specific for the receptor of IL17C blocks the binding of IL17C to IL17RE and IL17RA.
  • the present invention provides an antagonist of IL17C for use in the treatment or prophylaxis of an inflammatory disorder.
  • said treatment or prophylaxis comprises the step of administering to a subject an effective amount of the antagonist of IL17C.
  • said subject is a human.
  • said subject is a rodent, such as a rat or a mouse.
  • the disclosure pertains to an isolated monoclonal antibody or fragment thereof that cross-competes with an antibody described in Table 1.
  • the disclosure pertains to an isolated monoclonal antibody or fragment thereof that cross-competes with an antibody comprising 6 CDRs of one of the antibodies described in Table 1.
  • the disclosure pertains to an isolated monoclonal antibody or fragment thereof that cross-competes with an antibody described in Table 1 and reduces the specific binding of one of the antibodies described in Table 1 by at least 20%, 30%, 40%, 50%, 60%, 70%, 80% or 90% in an ELISA-based cross-competition.
  • the disclosure pertains to an isolated monoclonal antibody or fragment thereof that cross-competes with an antibody described in Table 1 and reduces the specific binding of one of the antibodies described in Table 1 to IL17C by at least 20%, 30%, 40%, 50%, 60%, 70%, 80% or 90% in an ELISA-based cross-competition.
  • the disclosure pertains to an isolated monoclonal antibody or fragment thereof that interacts with (e.g., by binding, stabilizing, spatial distribution) the same epitope as an antibody described in Table 1.
  • the disclosure pertains to an isolated monoclonal antibody or fragment thereof comprising 6 CDRs defined by Kabat of any of the antibodies in Table 1. In another aspect, the disclosure pertains to an isolated monoclonal antibody or fragment thereof comprising 6 CDRs defined by Kabat of each of the antibodies in Table 1.
  • the disclosure pertains to an isolated monoclonal antibody or fragment thereof comprising a VH and a VL of any of the antibodies in Table 1.
  • the disclosure pertains to a nucleic acid encoding an isolated monoclonal antibody or fragment thereof wherein the nucleic acid comprises a VH and a VL of any of the antibodies in Table 1.
  • the disclosure pertains to a nucleic acid encoding an isolated monoclonal antibody or fragment thereof having at least 75%, 80%, 85%, 90%, 95%, 98%, 99% sequence identity to nucleic acids described in Table 1.
  • Mouse IL17C was purchased from R&D Systems (#2306-MUCF; R&D Systems, Inc., Minneapolis, USA). Biotinylated mouse IL17C was prepared using the ECLTM biotinylation module (GE Healthcare; #1061918). After biotinylation the product was purified using ZebaTM Desalt spin columns (Pierce; #89889).
  • the extracellular domain (ECD) of mouse IL-17 receptor E was cloned as a C-terminal Fc fusion protein (referred to as “IL17RE/Fc”).
  • IL17RE/Fc C-terminal Fc fusion protein
  • a construct containing a v ⁇ -Leader followed by the ECD of mouse IL17C was transiently expressed in HKB11 cells (Cho et al. (2002) J. Biomed Sci. November-December; 9(6 Pt 2):631-8).
  • the products were purified via protein A affinity chromatography. Purity was analyzed under denaturing, reducing and denaturing, non-reducing conditions in SDS-PAGE and in native state by High Pressure-SEC and DLS.
  • IL17 receptor E To test binding of mouse IL17 to its putative receptor, IL17 receptor E an interaction assay was set up. The assay setup is depicted in FIG. 1A .
  • IL17 receptors B and E were coated on a Multi-Array® 384-well plate Standard plate (Meso Scale Discovery; #L21XA-4) and biotinylated mouse IL17C was added. Binding of mouse IL17C to its receptor was measured via binding of Streptavidin in a MSD Sector Imager 6000 (Meso Scale Discovery, Gaithersburg, Md., USA).
  • IL17C was clearly found to bind to mouse IL17RE/Fc, but not to mouse IL-17RB or another irrelevant receptor. Also, an irrelevant biotinylated ligand did not show binding to any of the three receptors tested.
  • the interaction assay is therefore highly specific and well suited for the analysis of IL17C-IL17 receptor E interactions.
  • A rat IgG 2A monoclonal anti-mouse IL17C antibody (R&D Systems; clone 311522,# MAB23061)
  • B rat IgG 2A monoclonal anti-mouse IL17C antibody (R&D Systems; clone 311523,# MAB2306)
  • C rat anti-mouse IL17C (US Biological; clone: 8B28, I#8439-20R3)
  • Antibodies were pre-incubated with biotinylated mouse IL17C and the preformed complex was then added to the coated mouse IL17RE/Fc.
  • the HuCAL PLATINUM® library was used to select specific Fab fragments against mouse IL17C.
  • This phagemid library is based on the HuCAL® concept disclosed in Knappik et al. (Knappik et al. (2000) J. Mol. Biol. 296:57-86) and employs the CysDisplay® technology for displaying the Fab on the phage surface (Lohning et al., WO2001/05950).
  • Phages were isolated using streptavidin-coupled magnetic beads (Invitrogen, #112-05D). To select high affinity antibodies, HCDR2 and LCDR3 libraries were generated after the second round of selection (average library size ⁇ 1 ⁇ 10 8 ) followed by two more selection rounds with further increased stringency and further decreased antigen concentrations.
  • Fab containing E. coli lysates were used for ELISA screening of the initial hits.
  • binders were investigates via ELISA screening on the directly coated antigen or on the biotinylated antigen.
  • MaxisorpTM 384 well plates (Nunc; #460518) were coated with 2.5 ⁇ g/mL mouse IL17C in PBS. After blocking of plates with 5% skimmed milk powder in PBS, Fab-containing E. coli lysates were added. Binding of Fabs was detected by F(ab) 2 specific goat anti-human IgG conjugated to alkaline phosphatase (diluted 1:5000) using Attophos fluorescence substrate (Roche: #11681982001). Fluorescence emission at 535 nm was recorded with excitation at 430 nm.
  • Fab-containing crude bacterial lysates for neutralizing activity in high throughput screening mode a slightly modified assay as outlined in Example 3 was used. MaxisorpTM 384 well MSD plates (Nunc; #460518) were coated with 30 ⁇ L mouse IL17RE/Fc at 0.6 ⁇ g/mL in PBS overnight at 4° C. The next day 20 ⁇ L Fab-containing E. coli lysates were pre-incubated for 30 min at RT with an equal volume of biotinylated mouse IL17C at 2 nM.
  • the IL17C-IL17 receptor E interaction assay revealed merely 141 sequence-unique clones belonging to 33 different HCDR3 families. This number was again reduced by confirmatory screening in ELISA and mouse IL17RE/Fc inhibition assay. To select candidates with best inhibitory activity, BEL lysates were pre-diluted up to 1:500 for use in IL17RE/Fc inhibition assay. Finally, 18 sequence-unique clones belonging to 8 different HCDR3 families could be identified which consistently and repeatedly were positive in the IL17C-IL17 receptor E interaction assay.
  • mice IL17C All purified chimeric human-mouse chimeric IgG2a antibodies were titrated on mouse IL17C for EC 50 determination in ELISA starting with a concentration of 100 nM. EC 50 values on mouse IL17C were determined in 1 to 3 independent experiments. Results are shown in FIG. 3 .
  • EC 50 values ranged between 200 and 1200 pM, with most EC 50 values were around 300 pM. Binding activity of 4 IgGs (MOR12755, MOR12756, 12757, 12758) could not be confirmed with purified IgG2a, therefore these IgGs were excluded from further characterization. None of the antibodies showed cross-reactivity to human IL17C (sequence identity 77%), to mouse IL-17B (sequence identity 30%) or to the negative control antigen lysozyme.
  • Monovalent affinities of anti-IL17C antibodies were determined by solution equilibrium titration (SET) using Fab fragments. Affinity determination in solution was basically performed as described in the literature (Friquet et al., (1985) J. Immunol. Meth. 77: 305-19). In order to improve the sensitivity and accuracy of the SET method, it was transferred from classical ELISA to ECL based technology (Haenel et al. (2005) Anal Biochem. 339.1: 182-84). Binders were expressed and purified in Fab_FH format. Some Fabs did either not bind or showed no sigmoidal binding curve in SET, therefore affinities could only be determined for 10 candidates. Monovalent affinities ranged between 48 and 4100 pM with most K D values of the Fabs in the low pM range ( ⁇ 100 pMError! Reference source not found.). Results are shown in FIG. 4 .
  • Results are depicted in FIG. 5 .
  • 11 out of the 12 IgGs showed inhibitory activity with mean IC 50 values ranging between 9 and 8442 pM. 9 out of these 11 inhibitory IgGs even had IC 50 values in the low picomolar range. The best candidates belonged to different HCDR3 families and were of different VL subtypes (kappa or lambda).
  • mice In order to analyse whether the selected anti-mouse IL17C antibodies are suitable for in vivo administration in mice, stability in mouse serum was determined for a subset of 11 purified IgGs that showed acceptable production yields and specific binding to mouse IL17C (see hereinabove).
  • MOR12743 and MOR12762 were selected as candidates for the in vivo proof of concept study.
  • CFA Completed Freund's adjuvant
  • IFA incomplete Freund's adjuvant
  • CII Bovine collagen type II
  • LPS lipopolysaccharide
  • Enbrel was obtained from MD Biosciences (Germany); Sigma (P4252, L'Isle d'Abeau, France), Whyett (25 mg injectable syringe, France), respectively. All other reagents used were of reagent grade and all solvents were of analytical grade.
  • DBA1/J mice male, 6-7 weeks old, approx 20 gram
  • Mice were kept on a 12 hr light/dark cycle (0700-1900). Temperature was maintained at 22° C., and food and water were provided ad libitum.
  • CII solution (2 mg/mL) was prepared with 0.05 M acetic acid and stored at 4° C.
  • equal volumes of adjuvant (IFA) and CII were mixed by a homogenizer in a pre-cooled glass bottle in an ice water bath. Extra adjuvant and prolonged homogenization may be required if an emulsion is not formed.
  • 0.1 mL of the emulsion was injected intradermally at the base of the tail of each mouse on day 1, a second booster intradermal injection (CII solution at 2 mg/mL in CFA 0.1 mLemulsion) was performed on day 21.
  • This immunization method was modified from published methods (Brand et al, 2007, Collagen-induced arthritis.
  • HDAC histone deacetylase
  • mice were randomly divided into equal groups and each group contained 10 mice. All mice were immunized on day 1 and boosted on day 21. Therapeutic dosing lasted from day 31 to day 46.
  • the negative control group was treated with vehicle (PBS) and the positive control group with Enbrel (10 mg/kg, 3 ⁇ week., i.p.).
  • Enbrel 10 mg/kg, 3 ⁇ week., i.p.
  • An antibody of interest was tested at 10 mg/kg, i.p. 3 times per week.
  • Group 2 Enbrel 10 mg/kg/3 ⁇ week, i.p.
  • Group 3 MOR03207 10 mg/kg/3 ⁇ week, i.p.
  • Group 4 MOR12743 10 mg/kg/3 ⁇ week, i.p.
  • Group 5 MOR12762 10 mg/kg/3 ⁇ week, i.p.
  • Anti-IL17C antibodies were administered i.p. three times a week at 10 mg/kg. Blood samples (approx 250 ⁇ L) were taken on days 31 and 46 for pharmacokinetic analysis.
  • mice were randomly divided into two equal groups containing 20 mice. All mice were immunized on day 1 and boosted on day 21. Prophylactic dosing lasted from day 21 to day 46.
  • the negative control group was treated with negative antibody (MOR03207, 10 mg/kg, 3 ⁇ week., i.p.)
  • An antibody of interest (MOR12762) was tested at 10 mg/kg, 3 ⁇ week, i.p.
  • Group 1 MOR03207 10 mg/kg/3 ⁇ week, i.p.
  • Group 2 MOR12762 10 mg/kg/3 ⁇ week, i.p.
  • Anti-IL17C antibodies were administered i.p. three times a week at 10 mg/kg. Blood sample (approx 250 ⁇ L) were taken on days 21, 36 and 46 for pharmacokinetic analysis.
  • the swelling of each of the four paws was ranked with the arthritic score as follows: 0—no symptoms; 1—mild, but definite redness and swelling of one type of joint such as the ankle or wrist, or apparent redness and swelling limited to individual digits, regardless of the number of affected digits; 2—moderate redness and swelling of two or more types of joints; 3—severe redness and swelling of the entire paw including digits; 4—maximally inflamed limb with involvement of multiple joints (maximum cumulative clinical arthritis score 16 per animal) (Nishida et al., 2004 (supra)).
  • clinical score values may be normalised as follows:
  • AUC of Clinical Score (AUC Score):
  • the area under the curve (AUC) from day 31(21) to day 46 was calculated for each individual animal.
  • the AUC of each animal was divided by the average AUC obtained for the vehicle in the study from which the data on that animal was obtained and multiplied by 100 (i.e. the AUC was expressed as a percentage of the average vehicle AUC per study).
  • the clinical score difference for each animal was divided by the average clinical score difference obtained for the vehicle in the study from which the data on that animal was obtained and multiplied by 100 (i.e. the difference was expressed as a percentage of the average clinical score difference for the vehicle per study).
  • X-ray photos were taken of the hind paws of each individual animal.
  • a random blind identity number was assigned to each of the photos, and the severity of bone erosion was ranked by three independent scorers with the radiological Larsen's score system as follows: 0—normal with intact bony outlines and normal joint space; 1—slight abnormality with any one or two of the exterior metatarsal bones showing slight bone erosion; 2—definite early abnormality with any three to five of the exterior metatarsal bones showing bone erosion; 3—medium destructive abnormality with all the exterior metatarsal bones as well as any one or two of the interior metatarsal bones showing definite bone erosions; 4—severe destructive abnormality with all the metatarsal bones showing definite bone erosion and at least one of the inner metatarsal joints completely eroded leaving some bony joint outlines partly preserved; 5—mutilating abnormality without bony outlines.
  • This scoring system is a modification from Salvemini et al., 2001 (Amelioration of joint disease in a rat model of collagen-induced arthritis by M40403, a superoxide dismutase mimetic. Arthritis Rheum. 44:2909-21); Bush et al., 2002 (Reduction of joint inflammation and bone erosion in rat adjuvant arthritis by treatment with interleukin-17 receptor IgG1 Fc fusion protein. Arthritis Rheum. 46: 802-5); Sims et al., 2004, (Targeting osteoclasts with zoledronic acid prevents bone destruction in collagen-induced arthritis. Arthritis Rheum., 50: 2338-46) and Jou et al., 2005 (Thrombospondin 1 as an effective gene therapeutic strategy in collagen-induced arthritis. Arthritis Rheum. 52:339-44).
  • mice C57BL/6J, Charles River
  • tobacco smoke TS
  • BAL bronchoalveolar lavage
  • MOR12743 was administered by the intra-peritoneal route (i.p.), 1 h prior to TS-exposure on days 1, 4, 7 and 10 of exposure. This resulted in significant inhibition of the total number of cells recovered in the BAL and specifically the numbers of epithelial cells and neutrophils.
  • MOR03207 was administered by the intra-peritoneal route (i.p.), 1 h prior to TS-exposure on days 1, 4, 7 and 10 of exposure. This did not result in any significant inhibition of total cell numbers or the numbers of any specifically identified cell types recovered in the BAL.
  • Roflumilast (ChemPharmaServe Ltd. Ref. 0010206) was administered 5 mg/kg orally (p.o.), 1 h prior to each TS-exposure. This significantly inhibited the total number of cells recovered in the BAL and specifically the numbers of epithelial cells neutrophils and lymphocytes.
  • Vehicle for i.p. administration D-PBS pH7.4 (PAA Product Ref. H15-002, Lot. H00208-2353) Vehicle for p.o. administration: PEG 200/water for injection (60%/40% v/v)
  • PBS Phosphate buffered saline
  • BAL bronchoalveolar lavage
  • Euthatal sodium pentobarbitone
  • the tobacco smoke was generated using ‘Marlboro 100’ cigarettes purchased from a commercial supplier.
  • MOR12743 and MOR03207 were frozen, at 1 mg/mL. Both test substances were allowed to thaw at 4° C. overnight prior to administration.
  • Roflumilast was formulated by placing a pre-weighed amount in a mortar and grinding gently while adding vehicle (PEG200/water, 60%/40% v/v) drop-wise to form a suspension. Suspensions were vortex-mixed prior to administration.
  • mice were exposed in groups of 5 in clear polycarbonate chambers (27 cm ⁇ 16 cm ⁇ 12 cm).
  • the TS from ‘Marlboro 100’ cigarettes was allowed to enter the exposure chambers at a flow rate of 100 mL/min.
  • the exposure period to TS was increased initially from 25 minutes at the start of the study (day 1) to a maximum of 45 minutes on day 3.
  • the exposure schedule used in this study was as follows:
  • the trachea was cannulated using a 10 mm long Luer fitting stainless steel cannula. Phosphate buffered saline (PBS) was used as the lavage fluid. A volume of 0.4 mL was gently instilled and withdrawn 3 times using a 1 mL syringe and then placed in an Eppendorf tube and kept on ice prior to subsequent determinations.
  • PBS Phosphate buffered saline
  • the cell pellet was re-suspended in a known volume of PBS and total cell numbers calculated by counting a stained (Turks stain) aliquot under a microscope using a haemocytometer.
  • the residual cell pellet was diluted to approximately 105 cells per mL.
  • the slide was air-dried and stained using Wrights/Giemsa stain as per the proprietary instructions. When dried and cover-slipped, differential cell-counts were performed using light microscopy. Approximately 400 cells were counted for each slide. Cells were identified using standard morphometric techniques.
  • mice were subjected to daily TS-exposure for 11 days and were sacrificed on the 12 th day, 24 h after the final TS-exposure.
  • Three groups received either vehicle (D-PBS), MOR12743 or MOR03207, i.p., 1 h prior to TS-exposure on days 1, 4, 7 and 10 of the study.
  • One group received Roflumilast, p.o., 1 h prior to each TS-exposure.
  • a further group was exposed to air for 11 consecutive days and sacrificed on the 12 th day, 24 h after the final air-exposure.
  • This group received vehicle (D-PBS), i.p., 1 h prior to exposure on days 1, 4, 7 and 10 of the study.
  • n 10.
  • mice were killed on day 12, by intra-peritoneal barbiturate anaesthetic overdose, 24 h after final exposure to air or TS.
  • a blood sample was taken over heparin from the sub-clavian vein and the plasma separated by centrifugation and stored at ⁇ 40° C.
  • a BAL was performed using 0.4 mL of phosphate buffered saline (PBS). Cells recovered from the BAL were used for the total cell and differential cell counts. The BAL supernatants and remaining cell pellet were stored at ⁇ 40° C. and ⁇ 80° C. respectively for possible future analysis. Following BAL, the cannula was left tied in place.
  • PBS phosphate buffered saline
  • the heart and lungs were removed after gently opening the thorax and cutting down either side of the sternum and ribs.
  • the left lobe was tied off, removed, snap-frozen and stored at ⁇ 80° C.
  • the right lobe was inflated with 10% phosphate buffered formalin (PBF) to a pressure of 18 cm of PBF for 20 minutes.
  • PBF phosphate buffered formalin
  • the trachea was then ligated below the cannula and the cannula removed.
  • the heart, lung & trachea were immersed in PBF.
  • Results are presented as individual data points for each animal and the mean value calculated for each group.
  • the data were therefore initially subjected to a one-way analysis of variance test (ANOVA), followed by a Bonferroni correction for multiple comparisons in order to test for statistically significant differences between treatment groups.
  • a “p” value of ⁇ 0.05 was considered to be statistically significant.
  • mice One group was exposed to TS daily for 11 days and received vehicle (D-PBS), i.p., 1 h prior TS-exposure on days 1, 4, 7 and 10 of the study.
  • D-PBS vehicle
  • mice When compared to a similarly treated air-exposed group, mice exhibited pulmonary inflammation presented as a significant increase (p ⁇ 0.001) in the total number of cells recovered in BAL at sacrifice on day 12 (24 h after the last TS-exposure). This inflammation consisted of significant increases in the numbers of macrophages, epithelial cells, neutrophils and lymphocytes (p ⁇ 0.001 for all), when compared with the air-exposed (sham) animals (Table 2).
  • MOR12743 5 mg/kg, administered i.p., 1 h prior to TS-exposure on days 1, 4, 7 and 10, significantly inhibited total cell numbers recovered in the BAL (26%, p ⁇ 0.001) and specifically epithelial cells (52%, p ⁇ 0.001) and neutrophils (48%, p ⁇ 0.001). Degree and significance of inhibition are summarised in Table 3.
  • MOR12743 5 mg/kg, administered i.p., 1 h prior to TS-exposure on days 1, 4, 7 and 10, did not significantly inhibit total cell numbers recovered in the BAL, or the numbers of any specifically identified cell-type elevated following TS-exposure. Data are summarised in Table 3.
  • Inhibition % p value % p value % p value % p value % p value Total cells 26 ⁇ 0.001 0 ns 32 ⁇ 0.001 Macrophages 6 ns ⁇ 3 ns 13 ⁇ 0.001 Epithelial Cells 52 ⁇ 0.001 8 ns 50 ⁇ 0.001 Neutrophils 48 ⁇ 0.001 ⁇ 1 ns 56 ⁇ 0.001 Lymphocytes 24 ns 20 ns 54 ⁇ 0.01 Eosinophils No statistically significant increase following TS-exposure All data were subjected to an ANOVA test for comparisons in order to test for significant differences between treatment groups. A “p” value of ⁇ 0.05 was considered to be statistically significant. ns not statistically significant.
  • mice were weighed at the start of the study, on day 6 and on day 12 prior to sacrifice. Over the 12 days of the study, sham-exposed mice showed little or no change in bodyweight. All TS-exposed groups showed some loss of bodyweight over this period but these losses were not statistically significant.
  • MOR12743 (5 mg/kg), administered i.p., on days 1, 4, 7 and 10, significantly inhibited the total number of cells recovered in BAL and specifically epithelial cells and neutrophils.
  • MOR03207 (5 mg/kg), administered in the same way, had no effect on total cell numbers recovered in BAL, or on the numbers of any specifically identified cell type.
  • LPS Lipopolysaccharide
  • COPD Cholysaccharide
  • mice were treated with different antibodies and Dexamethasone and compared to the mice subjected to LPS only. The summary of the groups is provided in Table 4.
  • mice BALB/c female mice from Harlan (France,) were used in the study. Mice weight was around 20 g.
  • mice were anesthetized by isoflurane inhalation. During the breathing, LPS was instilled intranasally. After 24 h, mice were anesthetized intra-peritoneally (IP) and Broncho Alveolar Lavage procedure was performed. Mice were anesthetized by injection of anaesthetic solution of 0.1 mL per 10 g of the mouse weight. The anaesthetic solution was composed of 18 ml 0.9% NaCl, 0.5 mL xylazine (5 mg/Kg) and 1.5 mL ketamine (75 mg/Kg).
  • the trachea was exposed through midline incision and canulated (with a mice catheter). BAL was performed twice using 1 mL of sterile PBS buffer. Lavage fluid was removed and centrifuged at 1500 rpm for 10 min at 4° C. The cell pellet was resuspended in 200 ⁇ L of PBS buffer. The cells were counted using a cell counter (Vet abc, France). The lavage fluid supernatant was kept at ⁇ 20° C. for inflammation mediators dosing.
  • BAL was performed 24 hours after LPS administration and cell counts were measured.
  • IL17C antagonists e.g. IL17C antibodies
  • IL17C antibodies are effective in the treatment of inflammatory disorders and diseases.
  • IL17C expression was measured via quantitative Real Time PCR (qRT-PCR) in different human respiratory tissue types (tertiary bronchus, quaternary bronchus and pulmonary artery) from both control and diseased samples.
  • Control samples were derived from non-smoking and smoking-donors whereas diseased samples were derived from COPD patients, acute/chronic bronchitis patients and patients having lung emphysema.
  • the primer probe sets used for qRT-PCR are shown below:
  • the probe was labeled at the 5′-end with 6-carboxyfluorescein (FAM) and at the 3′-end with 6-carboxy-tetramethyl-rhodamine (TAMRA).
  • FAM 6-carboxyfluorescein
  • TAMRA 6-carboxy-tetramethyl-rhodamine
  • DNased RNA was incubated with the reverse primers for beta 1, beta 2, beta 3 and GAPDH in reverse transcription buffer, with the samples being heated to 72° C. (to remove secondary structure) and then cooled to 55° C. (to anneal the primers).
  • MuLV reverse transcriptase and nucleotides were added and the reaction mixes were incubated for 30 minutes at 37° C. to allow cDNA synthesis to occur. The samples were then heated to 90° C. for 5 minutes to denature the reverse transcriptase.
  • IL17C a member of the interleukin 17 family of pro-inflammatory cytokines
  • IL17C a member of the interleukin 17 family of pro-inflammatory cytokines
  • increased expression levels of IL17C were observed in lung tissue samples derived from donors with diagnosed inflammatory respiratory diseases like COPD, bronchitis or lung emphysema in comparison to the control samples ( FIG. 11 ).
  • Imiquimod (IMQ) Psoriasis-Like Mouse Model
  • IL17C pro-inflammatory function of IL17C in the skin was examined in a non-infectious cutaneous inflammation mouse model of psoriasis where topical TLR7-TLR8 agonist Imiquimod induces psoriatic skin lesions characterized by epidermal proliferation and leukocyte infiltration, which are dependent on pathogenic TH17 cytokines (Van der Fits et al., J of Immunol. 2009 May 1; 182(9):5836-45.).
  • the role of IL17C in this particular model was recently documented (Ramirez-Carrozzi et al, Nat Immunol.
  • Vaseline Vaseline officinale, Cooper
  • Imiquimod cream Aldara, 5% cream, MEDA
  • the antibodies used were anti-mouse IL17A/F (R&D System, clone 50104, ref MAB421) and anti-mouse IL23p40 (eBioscience, clone C17.8, ref 16-7123-85)
  • mice Female, 18-20gr, approx. 10 weeks old were obtained from CERJ or Halan (France). Mice were kept on a 12 hr light/dark cycle (0700-1900). Temperature was maintained at 22° C., and food and water were provided ad libitum.
  • the control group was constituted with mice receiving the same quantity of Vaseline cream. Severity of skin inflammation (erythema, scaling and thickening) was observed every day. Body weight was daily recorded. At necropsy and at the days indicated, the ears and the back skin thicknesses were measured using a micrometer (Mitutoyo). Samples from back and ear skin were collected for histology and gene expression. Spleen and thymus weight was measured.
  • the IMQ group received a daily topical dose of 62.5 mg of Imiquimod cream on the shaved back and ear for 5 consecutive days (D0-D4), translating in a daily dose of 3.13 mg of the active compound.
  • the control group was constituted with control mice receiving the same quantity of Vaseline.
  • Antibodies were formulated in PBS, tested at 10 mg/kg (200 ug/mice) and administered i.p., 3 days before and at start of the experiment (D0), therefore, 6 different treatment groups were used:
  • IL17C protein expression was detected using biotinylated MOR12743 antibodies and IHC.
  • IL17C was expressed in the mast cells of the dermis both in control and IMQ treated groups (data not shown).
  • IMQ IMQ treated groups
  • IL17C expression was increased in keratinocytes of the epidermis from D2 to D4—with the higher expression observed at D3—as well as in some smaller inflammatory cells of the dermis and the stratum.
  • MOR03207 isotype control
  • KGM-GoldTM Keratinocyte Growth Medium-gold
  • KBM-GoldTM Keratinocyte Basal Medium-gold
  • SingleQuotsTM of growth factor supplements including bovine pituitary extract, hydrocortisone, hEGF, epinephrine, transferrin, insulin and GA-1000 (media & supplements all from Lonza).
  • Growth factor supplements including bovine pituitary extract, hydrocortisone, hEGF, epinephrine, transferrin, insulin and GA-1000 (media & supplements all from Lonza).
  • Recombinant human IL17C was from Novus Biologicals. Recombinant human IL-1 ⁇ and TNF ⁇ were from PeproTech. Recombinant human IL-17A and IL-22 were from R&D Systems.
  • TLR Toll-Like receptor
  • FLA flagellin
  • TLR7 guardiquimod
  • CL097 TLR7/8 agonist
  • CpG oligonucleotide ODN 2611 TLR9 agonist
  • the TLR4 agonist lipopolysaccharide LPS, from E. Coli serotype 026:B6) was obtained from Sigma.
  • RNA was extracted from cells using the RNeasy Mini Kit (Qiagen) and reverse-transcribed using Taqman® Reverse Transcription Reagents (Applied Biosystems). Twenty-five ⁇ l PCR reactions were prepared using Taqman® universal PCR master mix/No AmpErase® UNG and predesigned Assay-on-Demand Gene Expression primer/probe sets (all Applied Biosystems). qPCR was performed on the ABI Prism® 7000 (Applied Biosystems). Gene expression was normalized to the housekeeping gene GAPDH and expressed as ⁇ Ct values, with ⁇ Ct Ctgene-Ct(GAPDH) or expressed as relative mRNA level of specific gene expression as obtained using the 2- ⁇ Ct method.
  • the plate was washed with 100 ⁇ L PBST and 100 ⁇ L PBS and 35 uL of hBD2 standard or sample was added. After overnight incubation at 4° C., the plates were washed twice with PBST and once with PBS. Subsequently, 35 uL of biotinylated anti-hBD2 detection antibody solution (0.1 ⁇ g/mL in PBS containing 1% BSA) was added. After 2 hr incubation at room temperature, plates were washed as described above and incubated with 35 ⁇ L Streptavidin-HRP conjugate (Invitrogen, catno. SNN2004) diluted 1/2000 in PBS+1% BSA.
  • biotinylated anti-hBD2 detection antibody solution 0.1 ⁇ g/mL in PBS containing 1% BSA
  • IL-17RA is ubiquitously expressed
  • expression of IL-17RE is more restricted and its expression is particularly high on cells of epithelial origin.
  • ⁇ CT IL-17RE, GAPDH
  • IL-17A did not significantly induce IL17C mRNA on its own, it synergistically boosted and sustained the expression of IL17C over time when combined with the pro-inflammatory cytokines TNF or IL-1 ( FIG. 13A ).
  • IL17C As keratinocytes express high levels of IL-17RE, function of IL17C in these cells was further examined. Although human primary keratinocytes did not respond to IL17C alone, IL17C did stimulate expression of ⁇ -defensin-2 in synergy with other tested pro-inflammatory genes i.e. IL-1 ⁇ , TNF ⁇ and IL-22. Synergistic stimulation of ⁇ -defensin-2 mRNA expression was observed both at level of mRNA and protein.
  • IL17C produced by proinflammatory cytokines in keratinocytes could play a role in a positive feed forward loop that amplifies and sustains inflammatory gene expression in keratinocytes contributing to psoriasis skin inflammation.
  • Cross-competition of an anti-IL17C antibody or another IL17C binding agent may be detected by using an ELISA assay according to the following standard procedure. Likewise, cross-competition of an anti-IL17C antibody or another IL17C binding agent may be detected.
  • the general principle of the ELISA-assay involves coating of an anti-IL17C antibody onto the wells of an ELISA plate. An excess amount of a second, potentially cross-competitive, anti-IL17C antibody is then added in solution (i.e. not bound to the ELISA plate). Subsequently a limited amount of IL17C-Fc is then added to the wells.
  • IL17C may be fused with a tag, e.g. Fc, Flag, etc. which can be detected via an appropriate tag-specific antibody.
  • An antibody in solution that is cross-competitive to the coated antibody will be able to cause a decrease in the number of IL17C molecules that the coated antibody can bind relative to the number of IL17C molecules that the coated antibody can bind in the absence of the second, solution phase antibody.
  • Ab-X is chosen to be the immobilized antibody
  • Ab-Y is coated onto the wells of the ELISA plate, after which the plates are blocked with a suitable blocking solution to minimize non-specific binding of reagents that are subsequently added.
  • An excess amount of Ab-Y is then added to the ELISA plate such that the moles of Ab-Y IL17C binding sites per well are at least 10 fold higher than the moles of Ab-X IL17C binding sites that are used, per well, during the coating of the ELISA plate.
  • IL17C is then added such that the moles of IL17C added per well were at least 25-fold lower than the moles of Ab-X IL17C binding sites that are used for coating each well.
  • the ELISA plate is washed and a IL17C detection reagent is added to measure the amount of IL17C molecules specifically bound by the coated anti-IL17C antibody (in this case Ab-X).
  • the background signal for the assay is defined as the signal obtained in wells with the coated antibody (in this case Ab-X), second solution phase antibody (in this case Ab-Y), buffer only (i.e. no IL17C) and IL17C detection reagents.
  • the positive control signal for the assay is defined as the signal obtained in wells with the coated antibody (in this case Ab-X), second solution phase antibody buffer only (i.e. no second solution phase antibody), IL17C detection reagents.
  • the ELISA assay needs to be run in such a manner so as to have the positive control signal be at least 6 times the background signal.
  • the cross-blocking assay needs to be run in two formats: 1) format 1 is where Ab-X is the antibody that is coated onto the ELISA plate and Ab-Y is the competitor antibody that is in solution and 2) format 2 is where Ab-Y is the antibody that is coated onto the ELISA plate and Ab-X is the competitor antibody that is in solution.

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