WO2011053763A2 - Il-17a antagonists - Google Patents
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- 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
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- A61K47/59—Medicinal preparations characterised by the non-active ingredients used, e.g. carriers or inert additives; Targeting or modifying agents chemically bound to the active ingredient the non-active ingredient being chemically bound to the active ingredient, e.g. polymer-drug conjugates the non-active ingredient being a modifying agent the modifying agent being an organic macromolecular compound, e.g. an oligomeric, polymeric or dendrimeric molecule obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyureas or polyurethanes
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- C07K2317/33—Crossreactivity, e.g. for species or epitope, or lack of said crossreactivity
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- 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
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- 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
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- C07K2317/92—Affinity (KD), association rate (Ka), dissociation rate (Kd) or EC50 value
Definitions
- the present invention relates to interleukin-17A (IL-17A) antibody antagonists, polynucleotides encoding IL-17A antibody antagonists or fragments thereof, and methods of making and using the foregoing.
- IL-17A interleukin-17A
- Interleukin-17A is a cytokine secreted by activated Thl7 cells, CD8 + T cells, ⁇ T cells and NK cells in response to cytokines such as IL-23 and TGF- ⁇ , and regulates production of mediators such as antimicrobial peptides (defensins), proinflamatory cytokines and chemokines from multiple cell types such as fibroblasts and synoviocytes that are involved in neutrophil biology, inflammation, organ destruction and host defense (reviewed in Weaver et al . , Annu. Rev. Immunol. 25:821-52, 2007; Aggarwal et al . , J. Biol. Chem.
- IL-17A synergizes with other cytokines, such as TNF-a and IL- ⁇ to potentiate the pro-inflammatory environment.
- the IL-17A cytokine family consists of six homologs designated IL-17A, B, C, D, E and F, each with divergent and distinct biological roles (Kawaguchi et al . , J. Allergy Clin. Immunol. 114:1265-73, 2004; Rolls and Linden, Immunity 21:467-76, 2004; Moseley et al . , Cytokine Growth Factor Rev. 14:155-74, 2003) .
- IL-17F is most homologous to IL- 17A and shares many similar functional properties such as induction of neutrophilia in the lung and induction of proinflammatory cytokines; however, in man, IL-17F is about 10-fold less potent than IL-17A (Moseley et al . , Cytokine Growth Factor Rev. 14:155-74, 2003; Rolls et al . , Immunity, 21: 467-76, 2004; McAllister et al . , J. Immunol. 175:404-12, 2005) .
- IL-17A and IL- 17F can also form heterodimers , which have intermediate bioactivity in vitro (Wright et al . , J. Biol. Chem. 282:13447-55, 2007) .
- IL-17A mediates it effects by interacting with the
- IL-17F Interleukin-17 receptor A (IL-17RA) and receptor C (IL-17RC) (Moseley et al . , Cytokine Growth Factor Rev. 14:155-74, 2003; Toy et al . , J. Immunol. 177:36-9, 2006) .
- IL-17F signals through the same receptors, although IL-17F affinity to the receptors is significantly lower (Kuestner et al . , J. Immunol. 179:5462-73,
- Crystal structures of human IL-17F and human IL-17F/IL- 17RA complex identified a putative receptor-binding cavity in the IL-17F homodimer (Hymowitz et al . , EMBO J. 20:5332-41, 2001; Ely et al . , Nat. Immunology 10:1245-51, 2009) .
- a similar cavity was identified in the crystal structure of human IL-17A in complex with a neutralizing Fab, although the cavity was partially occupied (Gerhardt et al . , J. Mol. Biol. 394:905-21, 2009) .
- asthma asthma
- psoriasis psoriasis
- dermal hypersensitivity including atopic dermatitis (Toda et al . , J. Allergy Clin. Immunol. 111:875-81, 2003)
- systemic sclerosis Fejimoto et al . , J. Dermatolog. Sci. 50:240-42, 2008
- inflammatory bowel diseases including ulcerative colitis and Crohn's disease (Holtta et al., Inflamm. Bowel Dis. 14:1175-84, 2008; Zhang et al . , Inflamm. Bowel Dis. 12:382-88, 2006), and pulmonary diseases including chronic obstructive pulmonary disease (Curtis et al., Proc. Am. Thorac . Soc. 4:512-21, 2007) .
- Antibodies to IL-17A have been proposed for use in the treatment of IL-17A mediated diseases and disorders (PCT Publ . Nos: WO08/021156, WO07/070750, WO07/149032, WO06/054059,
- Fig. 1 A-H. CDR sequences of Family 2, 6a, 6b, 19a, and 19b IL-17A antibody antagonists.
- Fig. 2 Exemplary A) IGLV3 and IGLJ; and B) IGHV3 and IGHJ germline genes as scaffolds for grafting paratope residues.
- mAb6785 sequence is shown above. CDR regions are underlined and core contact sites in mAb6785 light chain (Y31, D49, Y90, F92, F93) and heavy chain (S52, T54, F57, Y59, Q99, L100 and T101) are denoted by an asterix "*".
- Framework 4 regions in B) are double underlined. Sequence shown are *01 alleles unless specifically
- Fig. 3 Rabat and Chotia numbering for select antibody A) light and B) heavy chains. Locations of Rabat CDRs and Chothia HVs are highlighted in gray.
- Fig. 4 Competitive binding assays of labeled A) and B) mAbl926; C) mAb317; D) mAb3171; E) and F) mAb7357 with IL-17A in an ELI SA format.
- FIG. 5 A) H/D exchange maps of the IL-17A complexed with different anti-IL-17A mAbs . Numbering above the protective blocks corresponds to mature IL-17A (SEQ ID NO: 105) sequence numbering .
- Fig. 6. A) The overall molecular structure of IL-17A/ Fab6468 complex. The dimer of IL-17A is shown dark gray and light gray. The two Fab molecules are shown in dark gray and light gray, repectively; B) Comparison of monomer of IL-17A (light gray) and IL-17F (dark gray) ; C) Dimer of IL-17A (light and dark gray) ; D) Dimer of IL-17F (light and dark gray) .
- Fig. 7. The two binding sites and the core epitope on IL- 17A for Fab6468. Protomers 1 and 2 are dark and light gray, respectively. The core epitope is indicated by the black oval. The broken line represents disordered residues.
- FIG. 8 Comparison of IL-17A and IL-17F putative receptor binding pockets.
- Fig. 9 Binding specificity of mAbl926 to different species of IL-17A proteins in an ELISA format.
- One aspect of the invention is an isolated antibody or fragment thereof, wherein the antibody binds specifically to human IL-17A having the sequence shown in SEQ ID NO: 105 at amino acid residues 56-68 (SEQ ID NO: 157) and 100-116 (SEQ ID NO:
- Another aspect of the invention is an isolated antibody or fragment thereof, wherein the antibody binds specifically to a P2 pocket cavity on human IL-17A, the P2 pocket cavity comprising amino acid residues V22, V24, L26, 128, Y62, L99, R101, F110, and LI 12 of SEQ ID NO: 105.
- Another aspect of the invention is an isolated antibody or fragment that binds specifically to human IL-17A that competes for human IL-17A binding with a monoclonal antibody comprising the amino acid sequences of certain heavy chain complementarity determining regions (CDR) 1, 2 and 3 (HCDR1, HCDR2, HCDR3) , the amino acid sequences of certain light chain complementarity determining reigons (CDR) 1, 2 and 3 (LCDR1, LCDR2, LCDR3) , the amino acid sequences of certain heavy chain variable regions (VH) or the amino acid sequences of certain light chain variable regions (VL) .
- CDR heavy chain complementarity determining regions
- LCDR1, LCDR2, LCDR3 amino acid sequences of certain light chain complementarity determining reigons
- VH amino acid sequences of certain heavy chain variable regions
- VL amino acid sequences of certain light chain variable regions
- Another aspect of the invention is an isolated antibody or fragment that binds specifically to human IL-17A, comprising certain heavy chain variable region paratope amino acid residues and certain light chain variable region paratope amino acid residues that interact with certain residues of human IL-17A having the amino acid sequence shown in SEQ ID NO: 105.
- Another aspect of the invention is an isolated antibody or fragment that binds specifically to human IL-17A, comprising a heavy chain variable region and a light chain variable region, wherein the antibody comprises a heavy chain variable region paratope selected from Chothia residues F56 and Y58; and a light chain variable region paratope selected from Chothia residues Y91, F93 and F94.
- Another aspect of the invention is an isolated antibody or fragment that binds specifically human IL-17A, comprising a heavy chain variable region (VH) and a light chain variable region (VL) , wherein the antibody comprises the amino acid sequences of certain heavy chain complementarity determining regions (CDR) 1,
- HCDR1 the amino acid sequences of certain light chain complementarity determining reigons (CDR) 1,
- LCDR1 LCDR2, LCDR3
- VH amino acid sequences of certain heavy chain variable regions
- VL amino acid sequences of certain light chain variable regions
- Another aspect of the invention is an isolated antibody or fragment that specifically binds human IL-17A, wherein the antibody comprises the amino acid sequences of certain heavy chains and the amino acid sequences of certain light chains.
- Another aspect of the invention is a pharmaceutical composition
- a pharmaceutical composition comprising the isolated antibody or fragment of the invention and a pharmaceutically acceptable carrier.
- Another aspect of the invention is an isolated antibody heavy chain comprising the amino acid sequence shown in SEQ ID NOs : 67, 68, 69, 81, 82, 83, 84, 85, 86, 92, 93, 94, 95, 96, 97, 98, 99, or 100.
- Another aspect of the invention is an isolated antibody light chain comprising the amino acid sequence shown in SEQ ID NOs: 76, 77, 78, 79, 80, 87, 88, 89, 90, or 91.
- Another aspect of the invention is an isolated
- polynucleotide encoding an antibody heavy chain comprising the amino acid sequence shown in SEQ ID NO: 67, 68, 69, 81, 82, 83, 84, 85, 86, 92, 93, 94, 95, 96, 97, 98, 99, or 100.
- Another aspect of the invention is an isolated
- polynucleotide encoding an antibody light chain comprising the amino acid sequence shown in SEQ ID NO: 76, 77, 78, 79, 80, 87, 88, 89, 90, or 91.
- Another aspect of the invention is a vector comprising at least one polynucleotide of the invention.
- Another aspect of the invention is a host cell comprising the vector of the invention.
- Another aspect of the invention os a method of inhibiting interaction of human IL-17A with IL-17RA comprising: providing a human IL-17A and IL-17RA; and
- Another aspecf of the invention si a method of inhibiting IL-17A biological activity, comprising: providing a human IL17-A and IL-17RA; and contacting the human IL-17A with an antagonist that binds the human IL-17A at at least one amino acid residue selected from the group consisting of V22, V24, L26, 128, Y62, L99, R101, F110, and L112.
- Another aspect of the invention is a method of treating an inflammatory condition comprising administering a therapeutically effective amount of the isolated antibody of claim 3 or 7 to a patient in need thereof for a time sufficient to treat the inflammatory condition.
- antagonist means a molecule that partially or completely inhibits, by any mechanism, IL-17A activity.
- exemplary antagonists are antibodies, fusion proteins, peptides, peptidomimetics , nucleic acids, oligonucleotides and small molecules.
- the agent can be identified using well known assays for IL-17A activity described below.
- IL-17A antibody antagonist or an "antibody reactive with IL-17A” as used herein refers to an antibody that is capable of, directly or indirectly, reducing or inhibiting IL- 17A biological activity, blocking binding of IL-17A to its receptor, or inhibiting IL-17A receptor activation.
- an antibody reactive with IL-17A can bind directly to IL-17A and neutralize IL-17A activity, i.e, block IL-17A signaling to reduce cytokine and chemokine release.
- IL-17A refers to a human IL-17A polypeptide having an amino acid sequence shown in GenBank Acc . No. NP_002181.
- SEQ ID NO: 105 shows the amino acid sequence of the mature human IL-17A.
- IL-17A in vivo forms homodimers of two monomers, which are designated monomer A and monomer B, or protomer A and protomer B, or protomer 1 and protomer 2, or chain A and chain B.
- IL-17A can also form a heterodimer with IL-17F.
- the term "IL-17A" comprises the monomer, the homodimer, and the heterodimer forms.
- IL 17Amut6 refers to a variant of IL-17A having A70Q and A132Q substitutions.
- the amino acid sequence of the mature IL-17Amut6 is shown in SEQ ID NO: 106, and the cDNA sequence in SEQ ID NO: 112.
- IL-17A and IL-17Amut6 have comparable activities (PCT. Pat Appl. No. WO09/003096) .
- IL-17A receptor comprises both receptor polypeptides, IL-17RA (GenBank Acc no: NP_055154, SEQ I NO: 107) and IL-17RC (GenBank Acc No NP_703191, SEQ ID NO: 113), and homodimers or heterodimers of the two polypeptides.
- antibodies as used herein is meant in a broad sense and includes immunoglobulin molecules including polyclonal antibodies, monoclonal antibodies including murine, human, human adapted, humanized and chimeric monoclonal antibodies, antibody fragments, multispecific antibodies formed from at least two intact antibodies, dimeric, tetrameric or multimeric antibodies.
- mAb monoclonal antibody
- Monoclonal antibodies are highly specific, typically being directed against a single epitope.
- the modifier “monoclonal” indicates the substantially homogeneous character of the antibody and does not require production of the antibody by any particular method.
- Immunoglobulins can be assigned to five major classes, namely IgA, IgD, IgE, IgG and IgM, depending on the heavy chain constant domain amino acid sequence.
- IgA and IgG are further sub-classified as the isotypes IgA x , IgA 2 , IgGi, IgG 2 , IgG 3 and IgG 4 .
- Antibody light chains of any vertebrate species can be assigned to one of two clearly distinct types, namely kappa ( ⁇ ) and lambda ( ⁇ ) , based on the amino acid sequences of their constant domains .
- the term "antibody fragments" comprise at least a portion of an immunoglobulin molecule, such as a heavy chain
- HCDR complementarity determining region
- LCDR complementarity determining region
- VH heavy chain variable region
- VL light chain variable region
- CH heavy chain constant region
- CL light chain constant region
- FR framework region
- An antibody may be a Fab, F(ab'), F(ah') 2 , scFv, dsFv, or diabody. Structures of the above mentioned antibody fragments, and techniques for the preparation and use of the antibodies and fragments thereof are well known in the art.
- An antibody variable region consists of a "framework" region interrupted by three "antigen-binding sites".
- the antigen-binding sites are defined using various terms: (i)
- Complementarity Determining Regions are based on sequence variability (Wu and Rabat, J. Exp. Med. 132:211-250, 1970; Rabat et al . , Sequences of Proteins of
- Chothia residues as used herein are the antibody VL and VH residues numbered according to Al-Lazikani (Al-Lazikani et al . , J. Mol. Biol. 273:927-48, 1997) . Correspondence between the two most used numbering systems, Rabat (Rabat et al.,
- polypeptide numbering is shown in Figure 3 for exemplary
- Framework or “framework sequences” are the remaining sequences of a variable region other than those defined to be antigen-binding site. Because the antigen-binding site can be defined by various terms as described above, the exact amino acid sequence of a framework depends on how the antigen-binding site was defined.
- substantially identical means that the two antibody or antibody fragment amino acid sequences being compared are identical or have "insubstantial differences.” Insubstantial differences are substitutions of 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 amino acids in an antibody or antibody fragment amino acid sequence that do not adversely affect antibody properties. Amino acid sequences substantially identical to the sequences disclosed herein are also part of this application. In some embodiments, the sequence identity can be about 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99% or higher.
- Percent identity can be determined for example by pairwise alignment using the default settings of the AlignX module of Vector NTI v.9.0.0 (Invitrogen, Carslbad, CA) .
- the protein sequences of the present invention can be used as a query sequence to perform a search against public or patent databases to, for example, identify related sequences.
- Exemplary programs used to perform such searches are the XBLAST or BLASTP programs (http //www ncbi nlm/nih gov), or the GenomeQuestTM (GenomeQuest , Westborough, MA) suite using the default settings.
- inflammatory condition refers to acute or chronic localized or systemic responses to harmful stimuli, such as pathogens, damaged cells, physical injury or irritants, that are mediated in part by the activity of
- cytokines e.g., neutrophils, monocytes, lymphocytes, macrophages
- inflammatory cells e.g., neutrophils, monocytes, lymphocytes, macrophages
- IL-17A-mediated inflammatory condition refers to an inflammatory condition resulting at least partially from IL-17A biological activity, or caused by IL-17A activity.
- exemplary IL-17A-mediated inflammatory conditions are psoriasis and rheumatoid arthritis.
- IL-17A-mediated condition encompasses all diseases and medical conditions in which IL-17A plays a role, whether directly or indirectly, in the disease or medical condition, including the causation, development,
- epitope as used herein means a portion of an antigen to which an antibody specifically binds.
- Epitopes usually consist of chemically active (such as polar, non-polar or hydrophobic) surface groupings of moieties such as amino acids or polysaccharide side chains and can have specific three- dimensional structural characteristics, as well as specific charge characteristics.
- An epitope can be composed of either or both contiguous or discontiguous amino acids that form a
- paratope as used herein means a portion of an antibody to which an antigen specifically binds.
- a paratope can be linear in nature or can be discontinuous, formed by a spatial relationship between non-contiguous amino acids of an antibody rather than a linear series of amino acids.
- a "light chain paratope” and a “heavy chain paratope” or “light chain paratope amino acid residues” and “heavy chain paratope amino acid residues” refer to antibody light chain and heavy chain residues in contact with an antigen, respectively.
- the term "specific binding” as used herein refers to antibody binding to a predetermined antigen with greater affinity than for other antigens or proteins.
- the antibody binds with a dissociation constant (K D ) of 10 ⁇ 7 M or less, and binds to the predetermined antigen with a K D that is at least ten fold less than its K D for binding to a non-specific antigen (e.g., BSA, casein, or any other specified polypeptide) other than the predetermined antigen.
- K D dissociation constant
- the phrases “an antibody recognizing an antigen” and “an antibody specific for an antigen” are used interchangeably herein with the term “an antibody specifically binding to an antigen” or "an antigen specific antibody” e.g. an IL-17A specific antibody.
- the dissociation constant can be measured using standard procedures .
- IL-17A biological activity or "IL-17A
- IL-17A activation refers to any activity occurring as a result of IL-17A binding to the IL-17A receptor.
- Exemplary IL- 17A biological activities result in increased secretion of IL-6 or IL-8, NF- ⁇ activation, or regulation of downstream kinases sucn as ERK1, ERK2 and p38 upon binding to the IL-17A receptor.
- the release of cytokines and chemokines from cells, tissues or in circulation, NF- ⁇ activation, or kinase phosporylation events can be measured using well known methods, for example
- vector means a polynucleotide capable of being duplicated within a biological system or that can be moved between such systems.
- Vector polynucleotides typically contain elements, such as origins of replication, polyadenylation signal or selection markers, that function to facilitate the duplication or maintenance of these polynucleotides in a biological system.
- examples of such biological systems may include a cell, virus, animal, plant, and reconstituted biological systems utilizing biological components capable of duplicating a vector.
- the polynucleotide comprising a vector may be DNA or RNA molecules or a hybrid of these.
- expression vector means a vector that can be utilized in a biological system or in a reconstituted biological system to direct the translation of a polypeptide encoded by a polynucleotide sequence present in the expression vector.
- polynucleotide means a molecule comprising a chain of nucleotides covalently linked by a sugar-phosphate backbone or other equivalent covalent chemistry. Double and single-stranded DNAs and RNAs are typical examples of
- polypeptide or "protein” means a molecule that comprises at least two amino acid residues linked by a peptide bond to form a polypeptide. Small polypeptides of less than 50 amino acids may be referred to as "peptides”.
- the present invention provides IL-17A antibody antagonists capable of inhibiting IL-17A biological activity and uses of such antibodies.
- exemplary mechanisms by which IL-17A activation may be inhibited by such antibodies include in vitro, in vivo or in situ inhibition of IL-17A homo-or heterodimerization, and blocking binding of IL-17A to the IL-17A receptor, inhibition of receptor dimerization, inhibition of kinase activity of
- antibody antagonists capable of inhibiting IL-17A activation by other mechanisms are also within the scope of the various aspects and embodiments of the invention. These antagonists are useful as research reagents, diagnostic reagents and therapeutic agents.
- the invention provides novel antigen-binding sites derived from human immunoglobulin gene libraries.
- the structure for carrying an antigen-binding site is generally an antibody heavy or light chain or portion thereof.
- the invention provides an isolated antibody or fragment thereof that binds specifically to human IL-17A, comprising a heavy chain variable region (VH) and a light chain variable region (VL) , wherein the antibody comprises the heavy chain complementarity determining region (CDR) 1, 2 and 3 (HCDR1, HCDR2 and HCDR3) amino acid sequences and the light chain complementarity determining region (CDR) 1, 2 and 3 (LCDR1, LCDR2 and LCDR3) amino acid sequences as shown in Table la.
- the invention provides an isolated antibody or fragment that binds specifically to human IL-17A, comprising a VH and a VL, wherein the antibody comprises the HCDR1, HCDR2 and HCDR3 amino acid sequences as shown in SEQ ID NOs: 23, 35 and 52, wherein the HCDR2 of SEQ ID NO: 35 is further defined as shown in Formula (I) :
- Xaai may be His, Met, Arg, Ser or Tyr;
- Xaa 2 may be Trp, Thr or Tyr
- Xaa 3 may be Tyr, Phe, Ser or Asp.
- the invention provides an isolated antibody or fragment that binds specifically to human IL-17A, comprising a VH and a VL, wherein the antibody comprises the LCDR1, LCDR2 and LCDR3 amino acid sequences as shown in SEQ ID NOs: 2, 5 and 11, wherein the LCDR3 of SEQ ID NO: 11 is further defined as shown in Formula (II) :
- Xaa 4 may be His or Gin
- Xaa 5 may be Phe or Gly
- Xaa 6 may be Thr, Val or Asn
- Xaa 7 may be lie, Thr or Tyr
- Xaa 8 may be Pro or Arg
- Xaa 9 may be Ser or Pro
- Xaaio may be His, Phe or Leu.
- the invention provides an isolated antibody or fragment that binds specifically to binding human IL- 17A, comprising a VH and a VL, wherein the antibody comprises the LCDR1, LCDR2, and LCDR3 amino acid sequences as shown in SEQ ID NOs: 2, 5 and 17, wherein the LCDR3 of SEQ ID NO: 17 is further shown in Formula (HI) :
- Xaa may be Gin or Thr
- Xaa ⁇ 2 may be Ser or Tyr
- Xaa i3 may be Asn, Arg, Val or Tyr;
- Xaai 4 may be His or Ser
- Xaais may be He, Thr, Leu, Ala or Ser;
- Xaais may be Pro , Leu or Ser
- Xaa i7 may be Pro , Ser, Phe or Leu;
- Xaaie may be Ala, Leu or Asp.
- the invention provides an isolatec body or fragment that binds specifically to human IL-17A, comprising a VH and a VL, wherein the antibody comprises the HCDR1, HCDR2 and HCDR3 amino acid sequences as shown in SEQ ID NOs: 24, 36 and 57, wherein the HCDR3 of SEQ ID NO: 57 is further defined as shown in Formula (IV) :
- Xaaig is Met, lie, Leu or Thr.
- the invention provides an isolated antibody or fragment that binds specifically to human IL-17A, comprising a VH and a VL, wherein the antibody comprises the LCDR1, LCDR2 and LCDR3 amino acid sequences as shown in SEQ ID NOs: 3, 6 and 22, wherein the LCDR3 of SEQ ID NO: 22 is further defined as shown in Formula (V) :
- Xaa 20 is Met, Leu, Thr or Tyr.
- the invention provides an isolated antibody or fragment that binds specifically to human IL-17A, comprising a VH and a VL, wherein the antibody comprises the HCDR1, HCDR2 and HCDR3 amino acid sequences as shown in SEQ ID NOs: 25, 46 and 61, wherein the HCDR2 of SEQ ID NO: 46 is further defined as shown in Formula (VI) :
- Xaa 2 i may be Ala, Gly, Thr or Val;
- Xaa 22 may be Asn or Ser
- Xaa 23 may be Gly, Met, Lys, lie, Leu or His;
- Xaa 24 may be Leu, Asp, Ala, His, Thr, Gly or Ser;
- Xaa 25 may be Gly or Ser
- Xaa 26 may be Thr, Gly, Tyr or Asp;
- Xaa 2 7 may be His, Trp, Tyr or Phe;
- Xaa 28 may be Lys, Thr or lie;
- Xaa 2 g may be Tyr, Phe or Asn, and
- HCDR3 of SEQ ID NO: 61 is defined as shown in Formula (VII) :
- Xaa 30 may be Met, Leu or Thr.
- the invention provides an isolated antibody or fragment that binds specifically to human IL-17A, comprising a VH and a VL, wherein the antibody comprises the HCDR1, HCDR2 and HCDR3 amino acid sequences as shown in SEQ ID NOs: 25, 51 and 58, wherein the HCDR2 of SEQ ID NO: 51 is further defined as shown in Formula (VIII) :
- Xaa 3 i may be Ala, Lys, Met or His;
- Xaa 32 may be Asn, Met, Thr or Arg;
- Xaa 33 may be Gly or Asp
- Xaa 34 may be Arg, His or Asn
- Xaa 35 may be Asp or Gly.
- Antibodies whose antigen-binding site amino acid sequences are substantially identical to those shown in Table la are encompassed within the scope of the invention. Typically, this involves one or more amino acid substitutions with an amino acid having similar charge or hydrophobic or stereochemical characteristics, and are made to improve antibody properties, for example stability or affinity.
- a conservative substitution may involve a substitution of a native amino acid residue with a nonnative residue such that there is little or no effect on the polarity or charge of the amino acid residue at that position.
- any native residue in the polypeptide may also be substituted with alanine, as has been previously described for alanine scanning mutagenesis (MacLennan et al., Acta Physiol. Scand. Suppl . 643:55-67, 1998; Sasaki et al . , Adv. Biophys. 35:1-24, 1998) .
- Conservative substitutions will produce molecules having functional and chemical
- Non-conservative substitutions in the functional and/or chemical characteristics of the molecules may be accomplished by selecting substitutions in the amino acid sequence that differ significantly in their effect on maintaining
- amino acid substitutions can be used to identify residues important for the function of the antibodies, such as residues affecting affinity, or residues that impart undesireable properties such as aggregation.
- Substitutions in the framework regions, in contrast to antigen- binding sites may also be made as long as they do not adversely affect the properties of the antibody.
- Framework substitutions can be made for example at the Vernier Zone residues (US. Pat. No. 6,649,055) to improve antibody affinity or stability.
- Substitutions can also be made at those framework positions in the antibody that differ in sequence when compared to the homologous human germline gene sequences to reduce possible immunogeneicity . These modifications can be done for example to antibodies derived from de novo antibody libraries, such as pIX libraries.
- amino acid substitutions also encompass non-natural amino acid residues which are typically incorporated by chemical peptide synthesis rather than by synthesis in biological systems. Amino acid substitutions can be done for example by PCR mutagenesis (US Pat. No. 4,683,195) .
- variants can be generated using well known methods, for example using random (NNK) or non-random codons, for example DVK codons, which encode 11 amino acids (ACDEGKNRSYW) , and screening the libraries or variants with desired properties, as shown in Example 1.
- Figure 1 shows substitutions made to five parent IL-17A antibody antagonists within the LCDR3, HCDR2 and HCDR3 regions to improve antibody properties .
- the invention provides an isolated antibody or fragment that binds specifically to human IL-17A, comprising a VH and a VL, wherein the antibody comprises certain VH and VL sequences, and also provides for each isolated VH and VL as shown in Table 2.
- alternative embodiments may comprise single heavy chain variable regions or single light chain variable regions, single full length antibody chains, or CDR1, CDR2 and CDR3 regions from one antibody chain, either heavy or light.
- the single variable region, full length antibody chain or CDR1, CDR2 and CDR3 region of one chain can be used to screen for
- the screening may be accomplished by phage display screening methods using, e.g., a hierarchical dual combinatorial approach disclosed in PCT Publ. No. WO92/01047.
- phage display screening methods using, e.g., a hierarchical dual combinatorial approach disclosed in PCT Publ. No. WO92/01047.
- an individual colony containing either a H or L chain clone is used to infect a complete library of clones encoding the other chain (L or H) , and the resulting two-chain specific antigen-binding domain is selected in accordance with phage display techniques as
- the invention provides an isolated antibody or fragment that binds specifically to human IL-17A, comprising a VH and a VL having amino acid sequences at least 90% identical to the VH and VL amino acid sequences shown in Table 2.
- the invention provides an isolated antibody or fragment that binds specifically to human IL-17A, comprising a VH and a VL having amino acid sequences at least 95% identical to the VH and VL amino acid sequences shown in Table 2.
- the invention provides an isolated antibody or fragment having certain heavy chain and light chain amino acid sequences as shown in Table 2.
- polypeptides encoding antibody chains can be numbered based on Rabat's or Chothia' s numbering (Rabat et al . , sequences of Proteins of Immunological Interest, 5th Ed. Public Health Service, National Institutes of Health, Bethesda, Md., 1991; Chothia and Lesk, Mol . Biol.
- the invention provides an isolated antibody or fragment that binds specifically to human IL-17A, comprising a VH and a VL, wherein the antibody comprises a heavy chain variable region paratope selected from Chothia residues S51, T53, F56, Y58, Q95, L96 and T97 and a light chain variable region paratope selected from Chothia residues Y32, D50, Y91, F93 and F94.
- the heavy chain paratope and the light chain paratope Chothia residues correspond to heavy chain residues S52, T54, F57, Y59, Q99, L100 and T101 of SEQ ID NO: 86 and light chain residues Y31, D49, Y90, F92 and F93 of SEQ ID NO: 79.
- the invention provides an isolated antibody or fragment that binds specifically to human IL-17A, comprising heavy chain variable region paratope amino acid residues that interact with residues of human IL-17A having the amino acid sequence shown in SEQ ID NO: 105, comprising:
- a lysine residue that interacts with E57 of human IL-17A a tyrosine residue that interacts with P59, E60 or R101 of human IL-17A;
- the invention provides an isolated antibody or fragment that binds specifically to human IL-17A, comprising light chain variable region paratope amino acid residues that interact with residues of human IL-17A having the amino acid sequence shown in SEQ ID NO: 105, comprising:
- a first tyrosine residue that interacts with P59, S64 or R101 of human IL-17A a second phenylalanine residue that interacts with P59, E60, R61, Y62, R101 or F110 of human IL-17A; and
- the invention provides an isolated antibody or fragment that binds specifically to human IL-17A, comprising heavy chain variable region paratope amino acid residues and light chain variable region paratope amino acid residues that interact with residues of human IL-17A having the amino acid sequence shown in SEQ ID NO: 105, comprising:
- the invention provides an isolated antibody or fragment that binds specifically to human IL-17A, comprising a heavy chain variable region and a light chain variable region, wherein the antibody comprises:
- a heavy chain variable region paratope selected from
- a light chain variable region paratope selected from
- the heavy chain paratope Chothia residues F56 and Y58 and the light chain paratope Chothia residues Y91, F92 and F94 are residues in direct contact with IL-17A residues L26, Y62, R101 and F110. These IL-17A residues are part of both the Fab6468 epitope and the P2 pocket cavity (see below) . While not wishing to be bound to any particular theory, it is believed that interaction between the Fab6468 and IL-17A at these select residues may be sufficient for the antibody to block IL-17A activity .
- Fully human mAbs lacking any non-human sequences can be prepared and optimized from phage display libraries by techniques referenced in, e.g., Knappik et al . , J. Mol. Biol. 296:57-86, 2000; and Krebs et al . , J. Immunol. Meth. 254:67-84 2001.
- the antibodies of the invention are isolated from libraries expressing antibody heavy and light chain variable regions as fusion proteins with bacteriophage pIX coat protein.
- the antibody libraries are screened for bining to human IL-17mut6 (SEQ ID NO: 105), and the obtained positive clones are further characterized, the Fabs isolated from the clone lysates, and expressed as full length IgGs. Exemplary antibody libraries and screening methods are described in Shi et al . , J. Mol. Biol.
- the resulting mAbs can further be modified in their framework regions to change certain framework residues to those present in a matching human germline, as exemplified within.
- Anibodies of the invention binding specific IL-17A epitopes can be made by immunizing humanized mice expressing human immunoglobulin loci (Lonberg et al . , Nature 368:856-9, 1994;
- mice with the peptides encoding the epitopes, for example peptide 56 NEDPERYPSVIWE 68 (SEQ ID NO: 157) or 100 RREPPHCPNSFRLEKILn 6 (SEQ ID NO: 158) and using the hybrodima method of Kohler et al . , Nature 256:495-97.
- the resulting antibodies are tested for their binding to the epitope using standard methods.
- the identified mAbs can further be modified by incorporating altered framework support residues to preserve binding affinity by techniques such as those disclosed in Queen et al . , Proc. Natl. Acad. Sci. (USA), 86:10029-32, 1989 and Hodgson et al., Bio/Technology, 9:421, 1991.
- Isolated antibodies having certain paratope residues that bind specifically to human IL-17A can be made, for example, by grafting the paratope residues into a suitable scaffold,
- Exemplary scaffolds are amino acid sequences of human antibody variable regions encoded by human germline genes.
- the scaffolds can be selected based on for example overall sequence homology, % identity between the paratope residues, or canonical structure class identity between the scaffold and an exemplary antibody, such as mAb6785.
- Human antibody germline genes are disclosed in, for example, Tomlinson et al . , J. Mol. Biol
- Consensus human framework regions can also be used, e.g., as described in U.S. Pat. No. 6,054,297. Selection of suitable scaffold can be done for example according to methods described in PCT Publ . No.
- scaffolds onto which the paratope residues are grafted are the genes encoded by the ⁇ 3, Vh3, J , and the Jh frameworks.
- VK3 genes are IGLV3-1, IGLV3-9, IGLV3-10, IGLV3-12, IGLV3-16, IGLV3-19, IGLV3-21, IGLV3-22, IGLV3-25, IGLV3-27, and IGLV3-32 (IMGT nomenclature, *01 alleles), (SEQ ID NOs : 117-127, respectively) .
- Exemplary J genes are IGLJ1, IGLJ2, IGLJ3, IGLJ4, IGLJ5, IGLJ6, and IGLJ7 (SEQ ID NOs: 128-134,
- Vh3 genes are IGHV3-7, IGHV3-9, IGHV3- 11, IGHV3-16, IGHV3-19, IGHV3-20, IGHV3-21, IGHV3-23, IGHV3-30, IGHV3-30*03, IGHV3-33, IGHV3-45, IGHV3-48, IGHV3-64, and IGHV3-74 (IMGT nomenclature, *01 alleles except when different allele is specificed) (SEQ ID NO : s 135-150, respectively) .
- Exemplary Jh genes are IGHJ1, IGHJ2, IGHJ3, IGHJ4, IGHJ5, and IGHJ6 (SEQ ID NO : s 151-156, respectively) .
- the germline J-regions are used in their entirety or in part to select FR4 sequences.
- the mAb6785 light chain paratope residues can be grafted into a ⁇ 3 protein framework encoded by IGLV3-1 (SEQ ID NO: 117) that is joined to the J region sequence encoded by IGLJ2 (SEQ ID NO: 129) with insertion of a single amino acid residue between the IGLV3-1 and IGLJ2 sequences, for example methionine.
- the ⁇ 3 protein framework encoded by IGLV3-1 may contain additional
- substitutions for example a substitution of cysteine residue at position 33 of SEQ ID NO: 117 (“ACW”) with for example
- sequences from other exemplary functional ⁇ 3 and genes can be used for grafting mAb6785 light chain paratope residues with the insertion of zero, one, or two amino acid residues between the carboxy- terminus encoded by the ⁇ 3 genes and the amino terminus encoded by the genes, such that the length of the CDR3 region is 11 amino acids.
- methionine and isoleucine can be inserted between IGLV3-22 (SEQ ID NO: 124) and IGLJ2 (SEq ID NO: 129) .
- Figure 2A shows alignment of exemplary light chain scaffolds that can be used for grafting.
- the mAb6785 heavy chain paratope residues can be grafted onto for example a Vh3 framework encoded by IGHV3-23 (SEQ ID NO: 142), that is joined to the J region FR4 sequence (11 C-terminal amino acids e.g.
- WGQGTLVTVSS of IGHJ1 (SEQ ID NO: 151), with the insertion of about about 5-7 residues, for example 6 residues, constituting HCDR3, between the V and the J regions.
- the inserted HCDR3 about 5-7 residues include insertion of glutamine, leucine and
- threonine e.g. 3 of the paratope residues from mAb6785 Vh (Table 10) .
- Sequences from other exemplary functional Vh3 and Jh genes can be used for grafting mAb6785 heavy chain paratope residues.
- one C-terminal amino acid from the Vh3 gene may be deleted before insertion of the about 5-7 residues constituting the HCDR3 so that only FR3 sequences are included in the
- the extended paratope residues of mAb6785 can be used in place of the core paratope residues.
- the paratope-grafted engineered antibodies can further be modified by substitutions of the Vernier Zone residues (U.S. Pat. No. 6,639,055) or the Affinity Determining Residues (U.S. Pat. Appl. No. 2010/0261620; Cobaugh et al . , J Mol Biol. 378:622- 33, 2008) to improve antibody properties for example affinity.
- the framework amino acid sequence in the paratope-grafted antibody may be 70%, 75%, 80%, 85%, 90%, 95%, 96%, 97%, 98%, or 99% identical to the mAb6785 framework sequences.
- Allelic variants of the exemplary germline gene frameworks can be used in place of the V and J region protein sequences. Th sequences of the allelic variants are well known and can be obtained at the International ImMunoGeneTics (IMGT) database
- Sequences from the antigen-binding sites can be grafted in addition to the paratope residues using standard methods. For example, a complete HCDR3 or LCDR3 may be grafted.
- Another embodiment of the invention is an isolated antibody or fragment that binds specifically to human IL-17A that competes for human IL-17A binding with a monoclonal antibody comprising certain HCDR1, HCDR2 and HCDR3 , and LCDR1, LCDR2 and LCDR3 amino acid sequences.
- Examplary monoclonal antibodies of the invention are an isolated antibody comprising HCDR1, HCDR2 and HCDR3 amino acid sequences as shown in SEQ ID NOs: 25, 43 and 60 and the LCDR1, LCDR2 and LCDR3 amino acid sequences as shown in SEQ ID NOs: 3, 6 and 18.
- IL-17A Competition between specific binding to IL-17A can be assayed in vitro using well known methods. For example, binding of MSD Sulfo-TagTM NHS-ester -labeled antibody to IL-17A in the presence of an unlableled antibody can be assessed by ELISA.
- Another embodiment of the invention is an isolated antibody or antibody or fragment thereof, wherein the antibody binds specifically to human IL-17A having the sequence shown in SEQ ID NO: 105 at amino acid residues 56-68 (SEQ ID NO: 157) and 100-116 (SEQ ID NO: 158); or at residues L26, R55, E57, P59, E60, R61, Y62, S64, V65, W67, R101, E102, P103 and F110.
- Hydrogen-deuterium (H/D) exchange can be carried out with the antigen and antibody complex to map regions on the antigen that may be bound by the antibody. Segment and point mutagenesis of the antigen can be used to locate amino acids important for antibody binding. Co-crystal structure of antibody-antigen complex is used to identify residues contributing to the epitope and paratope.
- Another embodiment of the invention is an isolated antibody or fragment thereof, wherein the antibody binds specifically to a P2 pocket cavity on IL-17A, the P2 pocket cavity comprising of amino acid residues V22, V24, L26, 128, Y62, L99, R101, F110, and LI 12 of SEQ ID NO: 105.
- Co-crystal structure of IL-17A homodimer with the anti-IL- 17A Fab6468 identified a hydrophobic P2 pocket cavity on the surface of the IL-17A homodimer, which is likely to be involved in IL-17RA binding (see Examples) .
- the "P2 pocket cavity” as used herein refers to a tertiary hydrophobic structural cavity on IL-17A homodimer, where the surface exposed residues in the P2 pocket are V24, L26, 128, Y62, L99, R101, F110 and L112 on monomer A and V22, V24 and L112 on monomer B, and vice versa.
- Select antibodies of the invention reactive with IL-17A for example Fab6468, have direct contacts with the P2 pocket cavity residues L26, Y62, R101 and F110, which residues are also part of the Fab6468 epitope. While not wishing to be bound by any particular theory, it is assumed that the antibodies of the invention binding the select IL-17A P2 pocket cavity residues block interaction between IL-17A and IL-17RA. Based on co- crystal structure, the phenlylalanine motif (FF) at residues 93 and 94 in a light chain (SEQ ID NO: 79) of Fab6468 blocks the IL- 17A/ IL-17RA interaction, and thus is a P2 pocket cavity blocker. Other P2 pocket cavity blocker antagonists are also within the scope of this invention, such as novel peptides or small
- inhibiting interaction of human IL-17A with IL-17RA comprising: providing human IL-17A and IL-17RA;
- Human IL-17A and IL-17RA can be provided as isolated proteins or fusion proteins.
- Human IL-17A homodimer can be purified from media of activated Thl7 cells prepared by in vitro stimulation of naive CD4 T cells by two anti-CD3/anti-CD28 stimulation in the presence of IL-2, IL-23 and IL- ⁇ .
- the IL-17RA can be associated with cells or cell membranes, can be native or overexpressed, or can be a fragment of IL-17RA, for example the extracellular domain of the receptor.
- the IL-17RA can be a human IL-17RA, or IL-17RA from other species such as from mouse, rat or monkey.
- Antagonists binding to human IL-17A residues V22, V24, L26, 128, Y62, L99, R101, F110, and LI 12 can be identified by the ability of the antagonist to replace Fab6468 binding to IL-17A, by mutagenesis studies or by co-crystal structures.
- Fusion proteins of human IL-17A and IL-17RA can be made by well known methods.
- Exemplary fusion protein is a soluble IL-17RA fused to an immunoglobulin Fc domain.
- Another aspect of the invention is an isolated
- polynucleotide encoding any of the antibody heavy chains or the antibody light chains or fragments thereof of the invention or their complement. Certain exemplary polynucleotides are
- polynucleotides which, given the degeneracy of the genetic code or codon preferences in a given expression system, encode the antibody antagonists of the invention are also within the scope of the invention.
- Exemplary polynuceotides are shown in SEQ ID NOs : 101, 102, 103 and 104.
- Exemplary antibody antagonists may be antibodies of the IgG, IgD, IgE, IgA or IgM isotypes. Additionally, such antibody antagonists can be post-translationally modified by processes such as glycosylation, isomerization, deglycosylation or non- naturally occurring covalent modification such as the addition of polyethylene glycol (PEG) moieties (pegylation) and lipidation. Such modifications may occur in vivo or in vitro.
- the antibodies of the invention can be conjugated to polyethylene glycol (PEGylated) to improve their pharmacokinetic profiles. Conjugation can be carried out by techniques known to those skilled in the art. Conjugation of therapeutic antibodies with PEG has been shown to enhance pharmacodynamics while not
- the "Fc” of an antibody is not involved directly in binding of an antibody to an antigen, but exhibits various effector functions.
- An antibody “Fc” is a term well known and is defined on the basis of papain cleavage of antibodies.
- the Fc of an antibody is directly involved in ADCC (antibody-dependent cell-mediated cytotoxicity) and CDC
- complement and Fc receptor binding sites are well known and include for example L234, L235, D270, N297, E318, K320, K322, P331, and P329 (numbering according to EU index of Rabat) (Brekke et al . , Eur. J. Immunol. 24:2542-7, 1995; US. Pat. Nos. 5,624,821, 7,597,889, Canfield and Morrison, J. Exp. Med. 173:1483-91, 1991) .
- mutation of Leu234/Leu235 in the hinge region of IgGl to L234A/L235A or Phe235/Leu236 in the hinge region of IgG4 to P235A/L236A minimizes FcR binding and reduces the ability of the immunoglobulin to mediate complement dependent cytotoxicity and ADCC.
- a Ser to Pro substitution in the Cys-Pro-Ser-Cys (CPSC) motif in the hinge region of IgG4 heavy chains capable of forming either inter- or intra-heavy chain disulfide bonds in vivo via action of isomerases results in "IgGl-like behavior", i.e., the Pro- substituted molecules are unable to form intra-heavy chain disulfide bonds.
- the location of the CPSC motif is typically found at residue 228 of a mature heavy chain but can change depending on CDR lengths .
- An exemplary IgGl Fc region having the Leu234/Leu235 residues has an amino acid sequence shown in SEQ ID NO: 114, wherein the residues L117 and L118 correspond to the Leu234/Leu235 residues in the mature heavy chain.
- An exemplary IgG4 Fc region having the Cys-Pro-Ser-Cys (CPSC) motif and the Leu234/Leu235 residues has an amino acid sequence shown in SEQ ID NO: 115, where the CPSC motif is located at residues 106-109 and the Leu234/Leu235 residues at positions 122 and 123.
- CPSC Cys-Pro-Ser-Cys
- Antibodies or fragments thereof of the invention modified to improve stability, selectivity, cross-reactivity, affinity, immunogenicity or other desirable biological or biophysical property are within the scope of the invention.
- Stability of an antibody is influenced by a number of factors, including (1) core packing of individual domains that affects their intrinsic stability, (2) protein/protein interface interactions that have impact upon the HC and LC pairing, (3) burial of polar and charged residues, (4) H-bonding network for polar and charged residues; and (5) surface charge and polar residue distribution among other intra- and inter-molecular forces (Worn et al . , J. Mol. Biol. 305:989-1010, 2001) .
- Potential structure including (1) core packing of individual domains that affects their intrinsic stability, (2) protein/protein interface interactions that have impact upon the HC and LC pairing, (3) burial of polar and charged residues, (4) H-bonding network for polar and charged residues; and (5) surface charge and polar residue distribution among other intra- and inter-molecular forces
- destabilizing residues may be identified based upon the crystal structure of the antibody or by molecular modeling in certain caases, and the effect of the residues on antibody stability can be tested by generating and evaluating variants harboring mutations in the identified residues.
- One of the ways to increase antibody stability is to raise the thermal transition midpoint (Tm) as measured by differential scanning calorimetry
- the protein Tm is correlated with its stability and inversely correlated with its susceptibility to unfolding and denaturation in solution and the degradation processes that depend on the tendency of the protein to unfold
- the antibody antagonists of the invention may bind IL-17A with a K d less than or equal to about 10 "7 , 10 "8 , 10 “9 , 10 "10 , 10 “11 or 10 " M.
- the affinity of a given molecule for IL-17A, such as an antibody can be determined experimentally using any suitable method. Such methods may utilize Biacore or KinExA
- Antibody antagonists binding human IL-17A with a desired affinity can be selected from libraries of variants or fragments by techniques including antibody affinity maturation. Antibody antagonists can be identified based on their inhibition of IL-17A biological activity using any suitable method. Such methods may utilize reporter-gene assays or assays measuring cytokine production using well known methods and as described in the application .
- Another embodiment of the invention is a vector comprising at least one polynucleotide of the invention.
- Such vectors may be plasmid vectors, viral vectors, vectors for baculovirus expression, transposon based vectors or any other vector suitable for introduction of the polynucleotides of the invention into a given organism or genetic background by any means.
- polynucleotides of the invention comprising any of the polynucleotides of the invention such as a polynucleotide encoding a polypeptide comprising an
- immunoglobulin heavy chain variable region having the amino acid sequence shown in SEQ ID NOs : 67-75 and 81-86 or an
- immunoglobulin light chain variable region having the amino acid sequence shown in SEQ ID NOs: 62-66 and 76-80 or an an
- Such host cells may be eukaryotic cells, bacterial cells, plant cells or archeal cells.
- Exemplary eukaryotic cells may be of mammalian, insect, avian or other animal origins.
- Mammalian eukaryotic cells include immortalized cell lines such as hybridomas or myeloma cell lines such as SP2/0 (American Type Culture Collection
- Hamster Ovary (CHO) cells such as CHO-K1SV (Lonza Biologies, Walkersville, MD) , CHO-K1 (ATCC CRL-61) or DG44.
- Another embodiment of the invention is a method of making an antibody reactive with IL-17A comprising culturing a host cell of the invention and recovering the antibody produced by the host cell.
- Methods of making antibodies and purifying them are well known in the art.
- the engineered family 2, 6a, 6b, 19a and 19b heavy chain sequences can include an N-terminal leader sequence such as MAWVWTLLFLMAAAQSIQA (SEQ ID NO:109) .
- nucleotide sequences encoding the heavy chain of candidate mAb6785 (family 19) with a leader sequence and the mature form (without a leader sequence) are shown in SEQ ID NOs: 101 and 102, respectively.
- the light chain sequences of the family 2, 6a, 6b antibodies of the invention can include an N-terminal leader sequence such as MGVPTQVLGLLLLWLTDARC (SEQ ID NO: 110) and the light chain
- sequences of the family 19a and 19b antibodies of the invention can include an N-terminal leader sequence such as
- MAWSPLLLTLLAHCTGSWA (SEQ ID NO: 116) .
- Exemplary nucleotide sequences encoding the light chain of codon optimized mAb6785 with a leader sequence and the mature form (without a leader sequence) are shown in SEQ ID NOs: 103 and 104, respectively.
- Another embodiment of the invention is a hybridoma cell line that produces an antibody of the invention.
- IL-17A antagonists of the invention may be utilized in any therapy where it is desired to reduce the effects of IL-17A in the animal patient.
- IL- 17A may be circulating in the body or may be present in an undesirably high level localised at a particular site in the body, for example a site of inflammation.
- the antagonists of the invention provide beneficial therapy by preventing or reducing IL-17A binding to its receptor, or homo- or heterodimerization of IL-17A.
- the methods of the invention may be used to treat an animal patient belonging to any classification. Examples of such animals include mammals such as humans, rodents, dogs, cats and farm animals.
- Antibodies of the invention may be useful for the
- IL-17A mediated conditions such as inflammatory conditions, allergies and allergic conditions, hypersensitivity reactions, autoimmune diseases, severe
- IL-17A mediated conditions are inflammatory conditions, immune and proliferative disorders, including rheumatoid arthritis (RA) , ankylosing spondylitis, psoriatic arthritis, osteoarthritis, osteoporosis, uveitis, inflammatory fibrosis (e.g., scleroderma, lung fibrosis, and cirrhosis), inflammatory bowel disorders (e.g., Crohn's disease, ulcerative colitis and inflammatory bowel disease) , asthma (including allergic asthma) , allergies, COPD, multiple sclerosis, psoriasis, systemic lupus erythematosus, diabetes and cancer.
- RA rheumatoid arthritis
- ankylosing spondylitis psoriatic arthritis
- osteoarthritis osteoarthritis
- osteoporosis uveitis
- inflammatory fibrosis e.g., scleroderma, lung fibrosis,
- Inflammatory pulmonary condition is an example of an inflammatory condition.
- Exemplary inflammatory pulmonary conditions include infection-induced pulmonary conditions including those associated with viral, bacterial, fungal, parasite or prion infections; allergen-induced pulmonary
- pollutant-induced pulmonary conditions such as asbestosis, silicosis, or berylliosis
- gastric aspiration-induced pulmonary conditions immune dysregulation, inflammatory
- fibrosis and physical trauma-induced pulmonary conditions, such as ventilator injury.
- These inflammatory conditions also include asthma, emphysema, bronchitis, chronic obstructive pulmonary disease (COPD) , sarcoidosis, histiocytosis, lymphangiomyomatosis , acute lung injury, acute respiratory distress syndrome, chronic lung disease, bronchopulmonary dysplasia, community-acquired pneumonia, nosocomial pneumonia, ventilator -associated
- infection- associated inflammatory diseases may include viral or bacterial pneumonia, including severe pneumonia, cystic fibrosis,
- IL-17A has been shown to regulate neutrophilic inflammation in the lungs - a hallmark of severe asthma as well as COPD - owing to the capacity of IL-17A to induce factors important in neutrophil recruitment, survival and activation from lung resident
- epithelial cells e.g, IL-6, IL-8, GM-CSF, G-CSF.
- antibodies aof the present invention suppress IL-6, IL-8, and GM- CSF secretion from lung epithelial cells, and thus may be beneficial in the therapeutic or prophylactic treatment of subjects with pulmonary inflammatory conditions, such as asthma and COPD.
- pulmonary inflammatory conditions such as asthma and COPD.
- Commonly used animal models for asthma and airway inflammation include the ovalbumin challenge model and
- antagonists of the present invention to any of these models can be used to evaluate the use of those antagonists to ameliorate symptoms and alter the course of asthma, airway inflammation, COPD and the like.
- Psoriasis is another example of an inflammatory condition.
- Psoriasis is characterized by T cell mediated hyperproliferation of keratinocytes coupled with an inflammatory infiltrate.
- the inflammation and hyperproliferation of psoriatic tissue is associated with a different histological, antigenic, and cytokine profile than normal skin.
- cytokines associated with psoriasis are: TNF , IL-19, IL-18, IL-15, IL-12, IL-7, IFNy, IL- 17A and IL-23 (Gudjonsson et al . , Clin. Exp. Immunol. 135:1-8, 2004) .
- IL-17A has been found overexpressed in psoriatic lesions (US Pat. No. 7,776,540) and positive outcomes in patients treated with anti-human IL-17A therapies have been
- IL-17A IL-17A signaling may perpetuate inflammation and further tissue damage in the inflamed joint.
- CIA collagen-induced arthritis
- mice develop chronic inflammatory arthritis that closely resembles human rheumatoid arthritis.
- Administration of the IL-17A antibodies of the present invention to the CIA model mice can be used to evaluate the use of these antagonists to ameliorate symptoms and alter the course of diseases.
- Exemplary gastrointestinal inflammatory conditions are inflammatory bowel disease (IBD), ulcerative colitis (UC) and Crohn's disease (CD), colitis induced by environmental insults
- gastrointestinal inflammation e.g., colitis
- a therapeutic regimen such as administration of chemotherapy, radiation therapy, and the like
- infections colitis ischemic colitis, collagenous or lymphocytic colitis, necrotizing enterocolitis, colitis in conditions such as chronic granulomatous disease or celiac disease, food allergies, gastritis, infectious gastritis or enterocolitis (e.g., Helicobacter pylori-infected chronic active gastritis) and other forms of gastrointestinal inflammation caused by an infectious agent.
- TNBS TNBS acid/ethanol
- DSS dextran sulfate sodium
- Another model involves the adoptive transfer of naive CD45RB hl9h CD4 T cells to RAG or SCID mice.
- donor naive T cells attack the recipient gut causing chronic bowel inflammation and symptoms similar to human inflammatory bowel diseases (Read and Powrie, Curr. Protoc . Immunol. Chapter 15 unit 15.13, 2001) .
- the administration of antagonists of the present invention in any of these models can be used to evaluate the potential efficacy of those antagonists to ameliorate symptoms and alter the course of diseases associated with inflammation in the gut, such as inflammatory bowel disease.
- Renal fibrosis can develop from either an acute insult (ex. graft ischemia/reperfusion) (Freese et al . , Nephrol. Dial.
- the pathogenesis is typically characterized by an initial inflammatory response followed by sustained fibrogenesis of the glomerular filtration apparatus and tubular interstitium (Liu, Kidney Int. 69:213-7, 2006) .
- Tubulointerstitial fibrosis has been shown to play a critical role in the pathogenesis of renal injury to end-stage renal failure and the proximal tubule cell has been revealed as a central mediator (Phillips and
- tubulointerstitial compartment is mediated in part by activation of resident fibroblasts, which secrete pro-inflammatory cytokines that stimulate the proximal tubule epithelium to secrete local inflammatory and fibrogenic mediators. Additionally, chemotactic cytokines are secreted by fibroblasts and epithelial cells and provide a directional gradient guiding the infiltration of monocytes/macrophages and T-cells into the tubulointerstitium.
- the inflammatory infiltrate produces additional fibrogenic and inflammatory cytokines that further activate fibroblast and epithelial cytokine release while also stimulating the epithelium to undergo a phenotypic transition in which the cells deposit excess extracellular matrix components (Simonson, Kidney Int.
- IL-17A has been shown to be upregulated during human renal allograft rejection (Van Kooten et al . , J. Am. Soc. Nephrol. 9:1526-34, 1998; Loong et al . , J. Path. 197:322-32, 2002) .
- IL-17A stimulates the production of the pro-inflammatory mediators IL-6, IL-8, complement component C3, and RANTES by proximal tubular epithelium (Van Kooten et al . , J. Am. Soc.
- liver fibrosis including but not limited to alcohol-induced cirrhosis, viral-induced cirrhosis, autoimmune-induced hepatitis
- lung fibrosis including but not limited to scleroderma, idiopathic pulmonary fibrosis
- kidney fibrosis including but not limited to scleroderma, diabetic nephritis, glomerular nehpritis, lupus nephritis
- dermal fibrosis including but not limited to scleroderma, hypertrophic and keloid scarring, burns
- the fibrosis can be organ specific fibrosis or systemic fibrosis.
- the organ specific fibrosis can be associated with lung fibrosis, liver fibrosis, kidney fibrosis, heart fibrosis, vascular fibrosis, skin fibrosis, eye fibrosis or bone marrow fibrosis.
- the lung fibrosis can be associated with idiopathic pulmonary fibrosis, drug induced pulmonary fibrosis, asthma, sarcoidosis or chronic obstructive pulmonary disease.
- the liver fibrosis can be associated with cirrhosis, schistomasomiasis or cholangitis.
- the cirrhosis can be selected from alcoholic cirrhosis, posthepatitis C cirrhosis, primary biliary cirrhosis.
- cholangitis can be sclerosing cholangitis.
- the kidney fibrosis can be associated with diabetic nephropathy or lupus
- the heart fibrosis can be associated with myocardial infarction.
- the vascular fibrosis can be associated with postangioplasty arterial restenosis or atherosclerosis.
- the skin fibrosis can be associated with burn scarring, hypertrophic scarring, keloid, or nephrogenic fibrosing dermatopathy .
- the eye fibrosis can be associated with retro-orbital fibrosis,
- the bone marrow fibrosis can be associated with idiopathic
- the systemic fibrosis can be systemic sclerosis or graft versus host disease.
- inflammatory conditions and neuropathies which may be prevented or treated by the methods of the invention are those caused by autoimmune diseases.
- These conditions and neuropathies include multiple sclerosis, systemic lupus erythematous, and neurodegenerative and central nervous system (CNS) disorders including Alzheimer's disease, Parkinson's disease, Huntington's disease, bipolar disorder and Amyotrophic Lateral Sclerosis (ALS), liver diseases including primary biliary cirrhosis, primary sclerosing cholangitis, non-alcoholic fatty liver disease/steatohepatitis, fibrosis, hepatitis C virus (HCV) and hepatitis B virus (HBV) , diabetes and insulin resistance, cardiovascular disorders including atherosclerosis, cerebral hemorrhage, stroke and myocardial infarction, arthritis,
- CNS central nervous system
- ALS neurodegenerative and central nervous system
- liver diseases including primary biliary cirrhosis, primary sclerosing cholangitis, non-alcoholic fatty liver
- rheumatoid arthritis psoriatic arthritis and juvenile rheumatoid arthritis (JRA) , osteoporosis, osteoarthritis, pancreatitis, fibrosis, encephalitis, psoriasis, Giant cell arteritis,
- HIV immunodeficiency virus
- transplant cancer
- allergies endocrine diseases
- wound repair other autoimmune disorders
- airway hyperresponsiveness and cell virus, or prion-mediated infections or disorders.
- the "therapeutically effective amount" of the agent effective in the treatment of conditions where suppression of IL- 17A activity is desirable can be determined by standard research techniques.
- the dosage of the agent that will be effective in the treatment of an inflammatory condition such as asthma, Crohn' s Disease, ulcerative colitis or rheumatoid arthritis can be determined by administering the agent to relevant animal models, such as the models described herein.
- in vitro assays can optionally be employed to help identify optimal dosage ranges. Selection of a particular effective dose can be determined (e.g., via clinical trials) by those skilled in the art based upon the consideration of several factors. Such factors include the disease to be treated or prevented, the symptoms involved, the patient's body mass, the patient's immune status and other factors known by the skilled artisan. The precise dose to be employed in the formulation will also depend on the route of administration, and the severity of disease, and should be decided according to the judgment of the practitioner and each patient's circumstances. Effective doses can be extrapolated from dose-response curves derived from in vitro or animal model test systems.
- the mode of administration for therapeutic use of the agent of the invention may be any suitable route that delivers the agent to the host.
- Pharmaceutical compositions of these agents are particularly useful for parenteral administration, e.g., intradermal, intramuscular, intraperitoneal, intravenous, subcutaneous or intranasal .
- the agent of the invention may be prepared as
- compositions containing an effective amount of the agent as an active ingredient in a pharmaceutically acceptable carrier.
- carrier refers to a diluent, adjuvant, excipient, or vehicle with which the active compound is
- Such pharmaceutical vehicles can be liquids, such as water and oils, including those of petroleum, animal,
- compositions may contain pharmaceutically acceptable auxiliary substances as required to approximate physiological conditions such as pH adjusting and buffering agents, stabilizing, thickening, lubricating and coloring agents, etc.
- concentration of the agent of the invention in such pharmaceutical formulation can vary widely, i.e., from less than about 0.5%, usually at or at least about 1% to as much as 15 or 20% by weight and will be selected primarily based on required dose, fluid volumes, viscosities, etc., according to the
- a pharmaceutical composition of the invention for intramuscular injection could be prepared to contain 1 ml sterile buffered water, and between about 1 ng to about 100 mg, e.g.
- a pharmaceutical composition of the invention for intravenous infusion could be made up to contain about 250 ml of sterile Ringer's solution, and about 1 mg to about 30 mg and preferably 5 mg to about 25 mg of an antagonist of the invention.
- compositions are well known and are described in more detail in, for example, "Remington's Pharmaceutical Science", 15th ed., Mack Publishing Company, Easton, PA.
- the antibody antagonists of the invention can be any antibody antagonists of the invention.
- the MorphoSys Human Combinatorial Antibody Library (HuCAL®) Gold phage display library (Morphosys AG, Martinsried, Germany) was used as a source of human antibody fragments and was panned in subpools in solution.
- the sublibraries were selected against biotinylated mature His6- tagged IL-17A A132Q and A70Q variant (IL-17Amut6) (SEQ ID NO: 106) .
- the amplified output of round 1 was selected against biotinylated His6-tagged IL-17Amut6 in the presence or absence of other IL-17A family members as a
- the amplified output of round 2 was divided in two pools. The first pool was panned as in round 1. The clones in the second pool were further diversified in either HCDR2 or LCDR3, depending on the sublibrary used in the initial selections, and then carried through 2 additional rounds of panning against IL- 17Amut6 to give a second source of clones for screening.
- Fabs from clone lysates were captured in ELISA plate wells coated with sheep anti-human Fd antibody and screened for binding to
- biotinylated IL-17Amut6 Crude lysates of positive clones were screened for inhibition of IL-17Amut6 binding to recombinant human IL-17RA receptor (SEQ ID NO: 107) .
- the Fabs were tested for their inhibition of IL-17Amut6 and cynoIL-17A binding to recombinant human IL-17RA receptor, and their binding to IL-17Amut6. All tested Fabs inhibited both IL- 17Amut6 and cynoIL-17A binding to the IL-17RA. Affninty of the Fabs to IL-17Amut6 was measured using the SET assay (Table 4) . From the identified Fabs, candidates from families 2, 6a, 6b, 19a and 19b were seleced for further characterization.
- the selected MOR# Fabs were converted and expressed as mAbs in a human IgGl format, and given corresponding MORmAb
- the generated MORmAbs were tested for expression and aggregation, their ability to inhibit human and cyno IL-17A binding to human IL-17RA, and IL-8 secretion from NHDF cells.
- Table 5 shows IC50 values for select assays for the MORmAbs. None of the tested MORmAbs (MORmAb#s 7702, 7708, 7785, 7786, 7706, 7775, 7700, 8095, 8096, 8097, 8098, 7768) cross-reacted with other IL-17 family members.
- variable regions were further engineered in their variable regions to change certain framework residues to those present in a matching human germline and to change codons to those most frequently occurring in highly expressed mammalian proteins.
- family 2 VL, L11V and V85T (linear sequence) substitutions were made, converting the framework to an exact match with the VK-1 germline Vb-L5 (IGKV1-12*01) .
- An exemplary variable region with the V11V and V85T substitutions is the variable region having the amino acid sequence shown in SEQ ID NO: 76.
- DIE, V59I and T86V substitutions were made (linear sequence) , converting the framework to exact match with the Vk-3 germline Vb-L6 (IGKV3-11*01) .
- An exemplary variable region with the DIE, V59I and T86V substitutions is the variable region having the amino acid sequence shown in SEQ ID NO: 77.
- family 6a and 6b VH a G44S substitution was made
- variable region with the G44S substitution is the variable region having the amino acid sequence shown in SEQ ID NO: 81.
- amino acids 1-3 DIE
- Exemplary variable region with the QSV substitution is a variable region having the amino acid sequence shown in SEQ ID NO: 79.
- family 19a and 19b VH a V5L substitution was made to give a close match the Vh-3 germline Vb 3-23 (IGHV3-23*01. Also, in this process the heavy chain constant region amino acid sequence residues 353-357
- variable region with the V5L substitution is a variable region having the amino acid sequence shown in SEQ ID NO: 86.
- substitutions is a heavy chain having the amino acid sequence shown in SEQ ID NO: 100.
- the engineered antibodies were given mAb numbers.
- the engineered mAbs were characterized as described above for the MORmAbs.
- the IC50 values (pM) measured using indicated assays are shown in Table 6. Table 6.
- Anti-IL-17 antibody inhibits cytokine secretion in NHBE cells
- IL-17A has been shown to regulate neutrophilic inflammation in the lungs, a hallmark of severe asthma as well as COPD, owing to the capacity of IL-17A to induce factors important in
- neutrophil recruitment, survival and activation e.g, IL-6, IL-8, GM-CSF
- Anti-IL-17 antibody inhibits the biological activity of IL-17A/F heterodimer
- NHDF Normal Human Dermal Fibroblasts
- rhIL-17A/F heterodimer concentration (1.47 nM) of rhIL-17A/F heterodimer (R&D Systems) was pre-incubated with a dilution series (30 ⁇ g/mL - 0.5 ng/mL) of mAb6785 or control antibodies for 10 minutes at room
- mAb6785 inhibited IL-17A/F heterodimer -induced IL-6 production by NHDF with EC50 2 ⁇ 2.5 nM.
- Electrochemiluminescence (ECL) based affinity determination in solution and data evaluation were basically performed as described previously (Haenel et al . , Anal Biochem 339:182-4, 2005) .
- a defined fixed concentration of purified Fab (10-100 pM) was incubated with increasing concentrations of IL-17Amut6 (highest concentration of 5 nM) in solution until chemical equilibrium was achieved.
- the signal was detected with 100 ⁇ of 1:10,000 dilution of 1 mg/ml SA-HRP (Jackson Immunoresearch, West Grove, PA) for 20 minutes at room temperature (RT) followed by 100 ⁇ /well of OPD substrate (Sigma-Aldrich Corp., St. Louis, MO) .
- the plates were read at 492 nm (Envision, PerkinElmer, Waltham, MA) .
- Fab binding to IL- 17RA was tested as described for mAbs.
- NHDF NHDF
- IL-17mut6 samples with no added antibody were included as control samples, while samples consisting of TNF-a or culture medium only were included as negative controls. Cells were incubated for 24 hours
- biotinylated cytokine was prepared at 2x final concentration. 100 ⁇ of cytokines at 2x final concentration were mixed (30-0 ⁇ g/ml final concentration) with 100 ⁇ of biotinylated IL-17mut6 at 2x final concentration (25 ng/ml final concentration) in assay buffer. Recombinant human IL-23 (R&D Systems, Minneapolis, MN) was used as a negative control, buffer only sample as background control, and IL-17mut6 as positive control. 100 ⁇ per well in duplicate of cytokine/biotinylated IL-17mut6 mixture was added to the plate and incubated for 1-2 hours.
- Affinity measurements using Surface Plasmon Resonance (SPR) were performed using a Biacore 3000 optical biosensor (Biacore) .
- Selected Fabs (-30 RU) or mAbs (-50 RU) were captured onto the sensor chip surface using a sheep anti-Fd antibody or an anti- human Fc antibody for Fab or mAb capture, respectively.
- Capture of Fab or mAb was followed by injection of huIL-17mut6 or cyno IL-17A in solution (0.2 to 49 nM) .
- Antibody epitopes were deduced by a combination of
- mAbl926, MORmAb7700, MORmAb7706, MORmAb7708, mAb7357 (a mouse anti-human IL-17A neutralizing antibody derived from hybridoma C1863)
- mAb2832 a mouse/human chimeric anti-human IL- 17A neutralizing antibody derived from hybridoma C1861
- mAb317 mouse anti- human IL-17A antibody, R&D Systems, Minneapolis, MN
- mAb3171 mouse anti-human IL-17A antibody, R&D Systems, Minneapolis, MN
- mAbeBI016-7178 (a mouse anti-human IL-17A antibody, e-Bioscience , San Diego, CA) .
- the three commercial antibodies showed varying degrees of neutralizing activity.
- IL-17Amut6 protein For competitive ELISA, 5 ⁇ (20 g/ml) of IL-17Amut6 protein was coated on MSD HighBind plate (Meso Scale Discovery, Gaithersburg, MD) per well for 2 hr at room temperature. 150 ⁇ of 5% MSD Blocker A buffer (Meso Scale Discovery, Gaithersburg, MD) was added to each well and incubated for 2 hr at room temperature. Plates were washed with 0.1 M HEPES buffer (pH 7.4) . Labeled antibody (MDS fluorescence dye), 10 nM, was incubated with increasing concentrations of competitor antibodies (1 nM - 2 ⁇ ) , and 25 ⁇ of the mixture was added to the
- Bin A mAbl926, MORmAb7706, and MORmAb7708
- Bin B eBiol6-7178 and mAb7357
- Bin C mAb317
- Bin D mAb3171.
- the back-exchanged IL-17Amut6 protein was eluted from the column and localization of deuterium containing fragments was determined by protease digestion and mass spec analysis. Regions bound to the antibody were inferred to be those sites relatively protected from exchange and thus containing a higher fraction of deuterium, compared to IL-17Amut6 not complexed with antibody.
- H/D exchange perturbation maps of IL-17Amut6 are shown in Figure 5. The numbers on top of the bars refer to IL-17Amut6 resiudes.
- MORmAb7700, MORmAb7706 and MORmAb7708 showed varying degrees of differential exchange for three segments of IL-17A (SEQ ID NO: 105) 45 NRS TS PWNLH 54 (SEQ ID NO: 159), 56 NEDPERYPSVIWE 68 (SEQ ID NO: 157) and i 00 RREPPHCPNSFRLEKILii 6 (SEQ ID NO: 158), indicating protection by the antibodies.
- the 56 NEDPERYPSVIWE 68 (SEQ ID NO: 157) fragment was strongly protected by MORmAb7708, weakly protected by MORmAb7700, and not protected by MORmAb7706. The overlap in the fragment protection patterns of these
- Bin A antibodies (MORmAb7700, MORmAb7706 and MORmAb7708) bound in the region of peptide segments 45 NRS TS PWNLH 54 , (SEQ ID NO: 159), 56 NEDPERYPSVIWE 68 (SEQ ID NO: 157) and i 00 RREPPHCPNSFRLEKILii 6 (SEQ ID NO: 158), of SEQ ID NO: 105, and Bin B antibodies (mAb7357 and mAbeBiol 6-7178 ) bound in region of peptide segment
- the IL-17A/Fab6468 complex was prepared by mixing IL- 17Amut6 and Fab6468 in 1:1.1 molar ratio in 20 mM MES pH 6.5, 0.2 M NaCl, and 10% glycerol and incubated over night at 4°C.
- the complex was purified from excess un-complexed Fab using size exclusion chromatography (SEC) on a Superdex 200 10/300 GL column (GE Healthcare, Piscataway, NJ) in 20 mM MES pH 6.5, 0.2 M NaCl, and 10% glycerol. Fractions corresponding to the complex were pooled and concentrated with an Amicon Ultra 10000 MWCO device to 4.6 mg/ml .
- MMS microseed-matrix screening
- Crystallographica Section D 63:550-4, 2007
- Diffraction quality crystals were obtained from the MMS screen in 0.1 M Sodium Acetate pH 5.5, 12% PEG MME 5000 and 0.2 M Lithium
- the crystal was soaked for a few seconds in the mother liquor supplemented with 24% glycerol, and flash frozen in the stream of nitrogen at 95°K.
- diffraction data were collected and processed using a Rigaku MicroMaxTM-007HF microfocus X-ray generator equipped with an OsmicTM VariMaxTM confocal optics, Saturn 944 CCD detector, and an X-streamTM 2000 cryocooling system (Rigaku, Woodlands, TX) .
- the crystal structure of IL-17A/Fab6468 was determined by molecular replacement using Phaser (Read, Acta Crystallogr D Biol Crystallogr, 57:1373-82, 2001) .
- the search models were IL-17F (PDB ID 1JPY) (Hymowitz et al . , EMBO J., 20:5332-41, 2001) and a homology model for the Fv (VH/VL) , which was constructed based upon the anti-IL-13 antibody CNTO607 (PDB ID 3G6A) (Teplyakov et al., J. Mol. Biol. 389:115-23, 2009) for both the VH and VL, using Modeller (Accelrys, CA) .
- the two constant domains CL/CH1 were taken from PDB ID 8FAB (Strong et al . , Biochemistry,
- the structure of the complex was determined to high
- IL-17A was a nearly symmetrical homo-dimer in the crystal and bound two Fab molecules .
- the antibody-antigen interactions were largely hydrophobic and in contrast to most antibodies, the light chain CDRs made a number of the important contacts.
- the overall molecular structure of IL-17A/Fab6468 complex is shown in Figure 6A.
- the monomer of the IL-17A dimer adopted the overall topology of a cystine knot ( Figure 6B) .
- the two monomers were very similar with a C RMSD of 0.54 A for 77 backbone Ca atoms.
- IL-17A monomer cystine knot was very similar to that of IL-17F with an rmsd of 0.71 A for 76 Ca atoms (Figure 6B) .
- Each IL-17A monomer was stabilized by three disulfide bonds.
- chain B three intra- chain disulfide bonds were observed (C 10 -C 106 , C 71 -C 121 , C 76 -C 123 ) , whereas for chain A the C 10 -C 106 disulfide bond was not observed due to disorder in these segments of the monomer.
- the latter two disulfide bonds stabilized the cystine knot architecture, analogous to IL-17F and NGF.
- the structural model for chain B of IL-17A included all residues 10-128 (residues 1-9 were disordered) , whereas for chain A residues only residues 21- 29, 41-104 and 109-127 were observed and the other residues 1-20, 30-40, 105-108 and 128 were missing due to disorder in the structure.
- residues 1-2 of both the light chains were disordered or had poor electron density.
- the C- terminal 3 residues of both the heavy and light chains, including the inter-chain disulfide bonds as well as the His tag on the heavy chain were disordered.
- the two N-terminal segments of IL-17A formed two interlocked monomers, which also gave rise to an apparent dimer of 26 kD on non-reducing SDS-PAGE.
- the dimer of the IL-17A was nearly symmetrical for the four main ⁇ -strands (strands 1-4) ( Figure 6C) .
- the C rmsd for 76 residues is 0.71 A.
- the slight asymmetry came from two sources. First, the chain A contained a number of disordered segments, mainly in N-terminus . Only a short ⁇ -strand (strand 0, residues 22-26) was apparently ordered, whereas residues 10-40 of chain B were ordered with a helical segment (residues 12-16) and a ⁇ - strand (strand 0, residues 21-25) .
- the contact residues from the antibodies in the two sites were not all identical.
- the residues involved in identical contacts to the core epitope residues are referred to as the "core paratope", which was composed of the following residues: Light Chain (LC) : Y31, D49, Y90, F92, F93 (SEQ ID NO: 79); and heavy chain (HC) : S52, T54, F57, Y59, Q99, L100 and T101 (SEQ ID NO: 86) (Table 10) .
- the core paratope residues are shown in bold in Table 10.
- the additional "extended paratope" residues identified in one monomer binding a specific IL-17A residue are shown in parenthesis.
- H/D protection data for the MORmAb7700 was in agreement with the co-crystal studies, as all core epitope residues identified in the co-crystal structure except L26 were within or at the borders of two of the protected segments identified by H/D exchange, 56 NEDPERYPSVIWE 68 (SEQ ID NO: 157) and
- RREPPHCPNSFRLEKIL 116 (SEQ ID NO: 158) for the MORmAb7700. All of the MORmAb7700 antibody derivatives, including MORmAb8302 and mAbl926, are assumed to have the same binding specificity as Fab6468 since they differ at most by one residue in the N- terminal region of VH (see Example 1), 3 residues at the N- terminus of VL (see Example 1) , and 3 CDR residues (one each in H2 , H3 and L3, Table la) , none of which are part of the antibody paratope .
- the IL-17A structure characterized in this invention is very similar to the previously published structure, except that due to missing segments, the P2 pocket cavity (see below) was not identified in the previous work (structure 2VXS, available at the Protein DataBank http //www rcsb org/pdb/home/home do; Gerhardt et al., J. Mol. Biol. 394:905-21, 2009) .
- Fab6468 would inhibit IL-17A function by blocking its interactions with IL-17RA and by analogy, IL-17RC, though the mode of interaction between IL-17RC and IL-17A is not known at the molecular level.
- the PI pocket which is analogous to a pocket first discovered in IL-17F (Hymowitz et al . , EMBO J, 20: 5332-41, 2001), is composed of residues Q94, E95, L97 and K114 of monomer A and L53, Y62, P63, V65, 166, W67, 196, V117 and V119 of monomer B, and vice versa.
- the PI pocket On one side of the dimer, the PI pocket is partially covered by the segment 30-40, whereas on the other side it was completely open due to the segment being disordered.
- the P2 pocket is also composed of residues from both chains: V24, L26, 128, Y62, L99, R101, F110 and LI 12 of monomer A and V22, V24 and L112 of monomer B, and vice versa.
- the FF motif of IL-17F is likely a structural discriminant for human IL-17A and IL-17F interactions with receptors IL-17RA and IL-17RC. It is likely that both of these largely hydrophobic pockets (PI and P2 ) are required for IL-17A binding to IL-17RA.
- the recent crystal structure of IL-17F/IL- 17RA complex shows that the FF motif is displaced by IL-17RA (Ely et al . , Nat. Immunology 10:1245-51, 2009) .
- IL-17A and IL-17F provide a basis for dissecting their interactions with respective receptors. Furthermore, it is conceivable that peptides, peptidomimetics and small molecules can be designed to bind in either or both pockets to block IL-17A and/or IL-17F from interacting with their receptors. Since the FF motif present in Fab6468 (residues F92 and F93 in SEQ ID NO: 79) binds P2 pocket residues L26, R61, L99, R101 and R102, the Fab 6468 structure could be used to select and optimize additional IL-17A
- antagonists such as peptides from randomized or designed peptide libraries using phage display.
- residues lining the PI and P2 pockets are well
- IL-17A/F heterodimer would adopt a nearly identical overall structure when compared to the IL-17A homodimer alone. Therfore, it is likely that the PI and P2 pockets are present in the IL-17A/F heterodimer with similar overall topology and constitute its receptor binding sites.
- IL-17A is likely that the PI and P2 pockets are present in the IL-17A/F heterodimer with similar overall topology and constitute its receptor binding sites.
- mAbtrl926 To evaluate cross-species binding specificity of mAbtrl926, a binding ELISA was performed with different IL-17A proteins coated on micro-titer plates. Human, mouse and rat IL-17A proteins were coated on the micro-titer plates. Serial dilutions of labeled mAbl926 were incubated at 37°C for 2 hours. Following incubation, micro-titer plates were washed thoroughly, and bound labeled mAbl926 was detected. mAb 1926 bound to human IL-17A much stronger than to rat or mouse IL-17A proteins ( Figure 9) .
Abstract
Description
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Priority Applications (13)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112012010280-0A BR112012010280B1 (en) | 2009-10-30 | 2010-10-29 | ISOLATED ANTIBODY OR FRAGMENT OF THE SAME THAT SPECIFICALLY LINKS TO HUMAN IL-17A, ITS USE, AND PHARMACEUTICAL COMPOSITION |
ES10827516T ES2728115T3 (en) | 2009-10-30 | 2010-10-29 | IL-17A antagonists |
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ES2728115T3 (en) | 2019-10-22 |
IL219390B (en) | 2019-01-31 |
KR20120102662A (en) | 2012-09-18 |
JP5922025B2 (en) | 2016-05-25 |
EA029283B1 (en) | 2018-03-30 |
IL219390A0 (en) | 2012-06-28 |
GT201200132A (en) | 2014-01-17 |
NZ599737A (en) | 2015-02-27 |
PE20121363A1 (en) | 2012-10-15 |
CN102905727A (en) | 2013-01-30 |
EP2493506B1 (en) | 2019-04-10 |
CO6541541A2 (en) | 2012-10-16 |
NI201200080A (en) | 2013-04-22 |
US8519107B2 (en) | 2013-08-27 |
WO2011053763A3 (en) | 2011-10-06 |
BR112012010280A2 (en) | 2017-06-20 |
EP2493506A2 (en) | 2012-09-05 |
BR112012010280B1 (en) | 2020-09-24 |
CR20120298A (en) | 2014-01-09 |
KR101836217B1 (en) | 2018-03-08 |
CL2012001141A1 (en) | 2012-11-30 |
CA2779257C (en) | 2019-03-12 |
AU2010313304B2 (en) | 2015-08-20 |
JP2013509193A (en) | 2013-03-14 |
CN102905727B (en) | 2016-12-07 |
EA201290254A1 (en) | 2012-12-28 |
CA2779257A1 (en) | 2011-05-05 |
AU2010313304A1 (en) | 2012-05-24 |
EP2493506A4 (en) | 2013-11-20 |
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