WO2020139175A2 - Гуманизированные антитела против участка бета цепи 9-го семейства trbv9 ткр человека, и способы их применения - Google Patents
Гуманизированные антитела против участка бета цепи 9-го семейства trbv9 ткр человека, и способы их применения Download PDFInfo
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Classifications
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- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
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- C07K16/2803—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily
- C07K16/2809—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against the immunoglobulin superfamily against the T-cell receptor (TcR)-CD3 complex
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- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
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- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
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- C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
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- C07K2317/00—Immunoglobulins specific features
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- C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
- C07K2317/515—Complete light chain, i.e. VL + CL
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- C07—ORGANIC CHEMISTRY
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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
- C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
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- 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 invention relates to the field of biotechnology and biomedicine, namely to antibodies or their antigen-binding fragments, as well as their use. More specifically, the present invention relates to a monoclonal humanized antibody that specifically binds to the human T cell receptor family. The invention also relates to a nucleic acid encoding a given antibody or antigen binding fragment thereof, an expression vector, a method for producing an antibody, and the use of an antibody for the treatment of diseases or disorders associated with the human T-cell receptor family.
- Variable sites of TCR form the antigen-binding center of TCR. This means that they are clone-specific, i.e. differ in T lymphocytes that respond to different antigens.
- V variable
- T-cell receptors are divided into different families. According to the IMGT nomenclature, 26 different families are distinguished for the beta chain and 41 families for the alpha chain (Turner SJ et al., Nature Reviews Immunology 2006, V.6, 883-894).
- TCR chain family To determine the TCR chain family, multiple alignment of the tested amino acid sequence with known TCR chain sequences is used, the information on which is summarized in the IMGT database (“The international ImMunoGeneTics information system”, Lefranc M-P., Nucl Acids Res 2001; 29: 207-209 ), available on the Internet at http://www.imgt.org. Multiple alignment and determination of the TCR chain family can be done using the IgBlast software package.
- Monoclonal antibodies W112 and 2D1 to beta-chain regions of the human T-receptor variable domains of the TRBV5-3 family of TRBV8-1 (W09006758), proposed as a tool for the diagnosis and treatment of rheumatoid arthritis, are described. These monoclonal antibodies recognize 0.3-5% of peripheral T lymphocytes bearing TRBV5-3 and 0.5-13% of peripheral T lymphocytes bearing TRBV8-1, respectively.
- the basis for the use of monoclonal antibodies specific for regions of beta-chains of T-receptors was the results of many studies demonstrating the involvement of T-lymphocytes in the pathogenesis of rheumatoid arthritis.
- Monoclonal antibodies specifically recognizing the beta chain of the 13th rat TRC family are also described.
- VB13 + T cells T cells whose T receptor contains the VB13 beta chain
- this procedure protects against the development of type I diabetes in rats disease of the line, and also significantly reduces the risk of developing virus-induced diabetes (Zhijun Liu et al., Diabetes. 2012 May; 61 (5): 1160-1168.).
- the removal of T cells whose T receptor contains a different family of beta chains (VB16) does not differ in result from the control groups. It is important to note that the very first administration of a monoclonal antibody against VB13 leads to a 60% reduction in the number of VB13 + T cells in the rat spleen.
- a consensus variant of autoimmune TCR with ankylosing spondylitis is described, it is shown that it is presented in patients with AS in synovial fluid and peripheral blood and is absent at the same depth of analysis in healthy donors, regardless of the status of the HLA * B27 allele (Faham M . et al., Arthritis Rheumatol. 2017; 69 (4): 774-784; Komech E et al. 12th EJI-EFIS Tatra Immunology Conference; 2016 Sep 3-7; Strbske Pleso, Slovakia. Abstract book p. 39).
- the indicated TCRs belong to the TRBV9 family (according to the IMGT nomenclature).
- T-cell receptors carrying beta chains of the TRBV9 family are also involved in the development of an autoimmune disease such as celiac disease (Petersen J et al., J Immunol. 2015; 194 (12): 6112-22). They are also found on the surface of T cells susceptible to magnetization in the case of T-cell lymphomas and T-cell leukemias, including T-cell lymphoma caused by Epstein-Barr virus (EBV) (Toyabe S et al., Clin Exp Immunol. 2003 ; 134 (1): 92-97).
- EBV Epstein-Barr virus
- chimeric monoclonal antibodies have been described that have the ability to specifically bind to the beta region of the human TRBV9 T-receptor family, which can be used in the treatment of autoimmune and oncological diseases, in the pathogenesis of which TKRs belonging to the TRBV9 family, for example, AS, celiac disease and some T -cellular lymphomas and T-cell leukemia (application for the invention of the Russian Federation 2017145662).
- the above parental monoclonal antibody includes:
- VH variable domain of their heavy chain
- HCDR1 (according to Kabat nomenclature) has the amino acid sequence of SEQ ID NO: 1,
- HCDR2 has the amino acid sequence of SEQ ID NO: 2
- HCDR3 has the amino acid sequence of SEQ ID NO: 3;
- VL variable domain of their light chain (VL), which contains 3 hypervariable region LCDR1, LCDR2 and LCDR3, in which:
- LCDR1 has the amino acid sequence of SEQ ID NO: 4,
- LCDR2 has the amino acid sequence of SEQ ID NO: 5,
- LCDR3 has the amino acid sequence of SEQ ID NO: 6.
- the above parental monoclonal antibody includes the variable domains of the heavy and light chains that have the amino acid sequences shown in SEQ ID NO: 8 and 10.
- the above parental monoclonal antibody includes a light chain that has the amino acid sequence shown in SEQ ID NO: 12 and an antibody heavy chain that has the amino acid sequence of SEQ ID NO: 14.
- nucleotide sequences encoding the indicated amino acid sequences of the heavy and light chains of the aforementioned parent antibody are given in SEQ ID NOs: 13 and 11.
- the invention is directed to the creation of a monoclonal antibody that can be used to eliminate T cells carrying TKR family TRBV9, in particular, for the treatment of AS, celiac disease and malignant blood diseases, in the pathogenesis of which TKR family TRBV9 is involved, and which is characterized by a high degree of humanization. Humanization at the same time often leads to a critical decrease in the affinity and / or solubility of antibodies. Thus, obtaining humanized functional antibodies is an urgent task.
- the present invention relates to a humanized monoclonal antibody and its antigennegative fragment, which have the ability to specifically bind specifically to the beta region of the human TRBV9 T-receptor family.
- the antibody according to the invention can be used as a medicine for the treatment of autoimmune and oncological diseases, in the pathogenesis of which TKR related to TRBV9 are involved.
- the antibody of the present invention comprises a heavy chain (VH) variable domain with three hypervariable regions
- HCDR 1 (according to Kabat nomenclature) has the amino acid sequence of SEQ ID NO: 1,
- HCDR 2 has the amino acid sequence of SEQ W NO: 2
- HCDR 3 has the amino acid sequence of SEQ ID NO: 3;
- variable domain of the light chain (VL) with three hypervariable regions LCDR1, LCDR2 and LCDR3, in which:
- LCDR 1 has the amino acid sequence of SEQ ID NO: 4,
- LCDR 2 has the amino acid sequence of SEQ ID NO: 5,
- LCDR 3 has the amino acid sequence of SEQ ID NO: 6.
- variable domains of the heavy and light chains of the antibody contain amino acid substitutions in the FR fragments of the variable domains of the heavy and light chains, which increase the degree of humanization of the antibody compared to the parent antibody.
- the antibody heavy chain variable domain of the present invention has the sequence shown in SEQ ID NO: 16 and differs from the parent antibody heavy chain variable domain, the amino acid sequence of which is shown in SEQ ID NO: 8, by the presence of humanizing amino acid substitutions.
- the antibody heavy chain variable domain of the present invention contains additional amino acid substitutions that do not affect antibody specificity.
- the light chain variable domain of an antibody of the present invention has the sequence shown in SEQ ID NO: 18, and differs from the heavy chain variable domain of the parent antibody, the amino acid sequence of which is shown in SEQ ID NO: 10, by the presence of humanizing amino acid substitutions.
- variable domain of the light chain of an antibody of the present invention contains additional amino acid substitutions that do not affect the specificity of the antibody.
- the monoclonal antibodies of the invention are full-length human IgG antibodies, for example, IgGl or IgG2 or IgG3 or IgG4.
- the antibody of the invention comprises a heavy chain, the amino acid sequence of which is at least 85% identical, or at least 90% identical, or at least 91% identical, or at least at least 92%, or identical, at least 93%, or at least 94%, or at least 95%, or at least 96%, or at least 97%, or at least 98% or at least 99% or 100% identical to the amino acid sequence of SEQ ID NO: 20.
- an antibody of the invention comprises a light chain whose amino acid sequence is at least 85% identical, or at least 90% identical, or at least 91% identical, or at least at least 92%, or identical, at least 93%, or at least 94%, or at least 95%, or at least 96%, or at least 97%, or at least 98% or at least 99% or 100% identical to the amino acid sequence of SEQ ID NO: 22.
- the antibody has a light chain, the amino acid sequence of which is shown in SEQ ID NO: 22, and a heavy chain, the amino acid sequence of which is shown in SEQ ID NO: 20.
- nucleic acids that encode the variable domains of the heavy and light chains of the antibodies of the invention, nucleic acids encoding the heavy and light chains of the antibodies of the invention, and functional fragments of antibodies.
- expression cassettes and expression vectors comprising the nucleic acid of the present invention and the regulatory elements necessary for expression of the nucleic acid in the selected host cell.
- the expression vector or cassette can be located in the host cell as an extrachromosomal element or integrated into the cell genome as a result of the introduction (by transfection) of the specified expression cassette or vector into the cell.
- cells and stable cell lines including nucleic acids, vectors or expression cassettes of the present invention, and methods for their preparation.
- the method comprises the subsequent isolation and purification of the resulting antibody.
- compositions for the prophylaxis or treatment of a disease or disorder mediated by the beta chain region of the human TRBV9 T receptor family containing the aforementioned antibody or antigen binding fragment thereof, in in combination with one or more pharmaceutically acceptable excipients.
- the pharmaceutical composition is intended to prevent or treat a disease or disorder selected from the group: ankylosing spondylitis, celiac disease, T-cell leukemia, T-cell lymphoma.
- a pharmaceutical combination is also provided for the prophylaxis or treatment of a disease or disorder mediated by a human T-cell receptor bearing a beta chain of the TRBV9 family containing the above antibody or antigen binding fragment thereof and at least one other therapeutically active compound.
- the pharmaceutical combination is intended to prevent or treat a disease or disorder selected from the group: ankylosing spondylitis, celiac disease, T-cell leukemia, T-cell lymphoma.
- the pharmaceutical combination or composition comprises another therapeutically active compound that is selected from a small molecule, an antibody, or steroid hormones, such as corticosteroids.
- the disease or disorder is selected from the group: ankylosing spondylitis, celiac disease, T-cell leukemia, T-cell lymphoma.
- the disease is selected from the group: ankylosing spondylitis, celiac disease, T-cell leukemia, T-cell lymphoma.
- the technical result of the present invention is to obtain antibodies with a high degree of humanization, which specifically with high affinity bind to TKR, the beta chain of which belongs to the TRBV9 family and can be used to treat autoimmune and oncological diseases, in the pathogenesis of which TKR, the beta chain of which belongs to the TRBV9 family.
- the antibody heavy chain variable fragment is characterized by a degree of humanization of 84%. In preferred embodiments, the variable fragment of the light chain of the antibody is characterized by a degree of humanization of 85%.
- the present invention relates to isolated monoclonal antibodies and their functional fragments having the ability to specifically bind to a portion of the beta chain of the TRBV9 family of T- human receptors with an increased degree of humanization relative to analogues.
- nucleic acids encoding the antibodies and fragments thereof of the invention, expression cassettes and expression vectors comprising the nucleic acid of the present invention and regulatory elements necessary for expression of the nucleic acid in the selected host cell.
- cells and stable cell lines are provided, including nucleic acids, vectors, or expression cassettes of the present invention.
- T-cell receptor also referred to as “TPK”, “T-receptor” or “TCR” of a person, is a heterodimeric protein complex located on the surface of a T lymphocyte.
- the T receptor is present only on T lymphocytes.
- the main function of TCR is the specific recognition of processed antigens associated with molecules of the major histocompatibility complex (HLA).
- HLA major histocompatibility complex
- Human TCR consists of two subunits, a and b, or g and d chains, interconnected by a disulfide bond and fixed in the cell membrane.
- Each of the TCR chains has an N-terminal variable (V) domain, a connecting domain, and a constant (C) domain connected to a transmembrane domain that secures the receptor in the plasma membrane of the T-lymphocyte.
- the length of the constant domain of alpha and beta chains is 91 and 129 amino acid residues, respectively.
- the length of the connecting and transmembrane domain of the alpha chain is 30 and 17 amino acid residues (a.a.), and that of the beta chain is 21 and 22 a.o.
- the length of the variable domains of T-receptors varies from 104 to 125 a.o.
- T lymphocytes A small fraction of T lymphocytes has g / d type T receptors. In their structure, they are similar to a / b receptors, but differ in their primary structure and have a number of functional features. Their variability is much lower (limited clone specificity), they recognize antigens in combination with "non-classical" (not MHC) antigen-presenting molecules or even free antigens.
- the T receptor interacts with the MHC-antigen complex in six regions that determine its complementarity (CDR): three regions of the alpha chain and three beta chains. These CDRs are hypervariable regions, loops of the variable domains of the T-cell receptor - Ualfa and Ubeta.
- TRBV9 or "TRBV9 family” refer to the ninth family of beta chains of T-cell receptors isolated according to the IMGT nomenclature, which is characterized by the fact that the amino acid sequence of their variable domain includes unique motifs CDR1 (amino acid sequence - SGDLS) and CDR2 (sequence amino acids - YYNGEE).
- TCR of the TRBV9 family refers to a T cell receptor whose beta chain belongs to the TRBV9 family.
- T-lymphocytes or TCR means that this TCR or T-lymphocyte bearing it is associated with a disease or pathology and / or is the cause of the disease and / or contribute to the development of the disease.
- autoimmune in relation to TCR means that this TCR is involved in the development of an autoimmune disease.
- antibody as used herein is intended to define an immunoglobulin molecule consisting of four polypeptide chains (two heavy (H) chains and two light (L) chains) linked by disulfide bonds.
- Light chains are classified as kappa or lambda.
- Heavy chains are classified as gamma, mu, alpha, delta or epsilon, and they define an isotype of an antibody, such as IgG, IgM, IgA, IgD and IgE, respectively, and several of them can be further divided into subclasses (isotypes), for example, IgGl, IgG2, IgG3, IgG4, IgAl and IgA2.
- Each type of heavy chain is characterized by a specific constant region.
- Each heavy chain contains a variable region of the heavy chain (abbreviated here as HCVR or VH) and a constant region of the heavy chain.
- the heavy chain constant region contains three CHI, CH2, and CH3 domains.
- Each light chain contains a variable region of the light chain (abbreviated here as LCVR or VL) and a constant region of the light chain.
- the light chain constant region contains one CL domain.
- the VH and VL regions can be further subdivided into hypervariability regions called complementarity determining regions (CDRs) surrounded by regions that are more conservative called skeletal regions (FR).
- CDRs complementarity determining regions
- FR skeletal regions
- Each of VH and VL consists of three CDRs and four FR sites located from the amino to the carboxyl end in the following order: FR1, CDR1, FR2, CDR2, FR3, CDR3, FR4.
- CDRs of the heavy chains are designated as “HCDR1, HCDR2 and HCDR3”, and 3 CDRs of the light chain are designated as “LCDR1, LCDR2 and LCDR3”.
- CDRs contain most residues that form specific interactions with the antigen.
- the numbering and positioning of CDR amino acid residues within the HCVR and LCVR regions of the antibodies of this invention is carried out with the well-known Kabat nomenclature, unless otherwise indicated. In this application, unless otherwise indicated, the generally accepted letter designations of amino acids.
- anti-TRB U9 antibody refers to an antibody, which specifically binds to the beta chain epitope of the TRBV9 family of the human T cell receptor.
- the “monoclonal antibody” as used herein may be a single chain Fv fragment that can be obtained by linking DNA encoding LCVR and HCVR to a linker sequence (see Pluckthun, The Pharmacology of Monoclonal Antibodies, vol. 113, Rosenburg and Moore eds., Springer-Verlag, New York, p. 269-315, 1994). It is understood that, regardless of whether fragments or parts are indicated, the term “antibody” as used herein includes such fragments or parts, as well as single chain forms. As long as the protein retains the ability to specifically or preferentially bind its target (eg, epitope or antigen), it refers to the term “antibody”. Antibodies may or may not be glycosylated, and are within the scope of the invention.
- antibody and “monoclonal antibody” for the needs of this application refer to a monoclonal antibody against TCR of the TRBV9 family.
- a “monoclonal antibody” refers to a rodent, primate family or Camelidae antibody, preferably a mouse, macaque, camel or llama antibody, a chimeric antibody, a humanized antibody, or a fully human antibody, unless otherwise indicated.
- a "monoclonal antibody” population refers to a homogeneous or substantially homogeneous antibody population (i.e., at least about 85, 90, 91, 92, 93, 94, 95, 96%, more preferably at least about 97 or 98% or even more preferably at least 99% of the antibodies in the population will compete in the ELISA for the same antigen or epitope, or more preferably the antibodies are identical in amino acid sequence).
- Antibodies may or may not be glycolized and still fall within the scope of the invention.
- Monoclonal antibodies can be homogeneous if they have the same amino acid sequence, although they may differ in post-translational modification, for example, the glycolization pattern.
- variable regions of each of the light / heavy chain pairs form the antigen-binding sites of the antibody.
- antigen binding portion or “antigen binding site” or “antigen binding domain” or “antigen binding center” refers, interchangeably, to that part of an antibody molecule that contains amino acid residues that interact with the antigen and give the antibody its specificity and affinity for the antigen. This part of the antibody includes the "frame" amino acid residues necessary to maintain the proper conformation of antigen binding residues.
- human antibody as used herein means an antibody in which the sequences of the variable and constant domains are derived from human sequences.
- Human antibodies of the invention may include amino acid residues that are not characteristic of humans (for example, mutations introduced by undirected or site-specific mutagenesis in vitro or somatic mutation in vivo), for example, in CDR and especially in CDR3.
- humanized with respect to antibodies is used to refer to antibodies that are characterized by the presence of human constant regions and structural components, but have complementarity determining regions (CDRs) that characteristic of immunoglobulins of other origin or corresponding fragments of modified antibodies.
- CDRs complementarity determining regions
- a “parent” antibody in this application is an antibody encoded by the amino acid sequence that is used to produce the variant.
- the parent antibody may be from a rodent, llama, chimeric, humanized, or human antibody.
- the term “degree of humanization” with respect to antibodies is used to denote the percent sequence identity of the framework region of a humanized antibody relative to the primary human acceptor framework region that was used to create the humanized antibody and which is available from the human library.
- the antibody of the invention contains a frame region with an identity of at least 80%, usually at least 82%, more often at least 83%, for example at least 84%, or at least 85%, or at least 86%, or at least 87% identity in relation to the frame portion obtained from the human library.
- humanizing substitutions refers to amino acid substitutions that increase the degree of humanization of an antibody or fragment thereof.
- chimeric in relation to the antibodies of the present invention is used to refer to antibodies that are characterized by the presence of human constant regions, but have variable domains of a different origin.
- variable domains of light and / or heavy chains of non-human origin for example, taken from rats
- non-human origin for example, taken from rats
- operatively linked refers to polypeptide sequences that are are in physical (covalent, unless otherwise indicated) and functional connection with one another.
- the functions of the polypeptide components of the chimeric molecule are not changed compared with the functional properties of the isolated polypeptide components.
- nucleotide sequences encoding a chimeric protein including “operably linked” components consist of fragments encoding these components, where these the fragments are covalently linked in such a way that during translation and transcription of the nucleotide sequence a full-sized chimeric protein is produced, for example, a chimeric antibody according to the invention.
- isolated and “isolated” mean a molecule or cell that is in an environment other than the environment in which the molecule or cell is in vivo.
- the antibodies of the present invention are recombinant, that is, obtained using the recombinant DNA technique.
- recombinant antibody includes all antibodies that are obtained, expressed, created or isolated by recombinant means, such as antibodies expressed using a recombinant expression vector introduced into a host cell, antibodies isolated from a set of known recombinant human combinatorial antibodies, antibodies isolated from an animal, which is transgenic in relation to genes for human immunoglobulin (see, for example, Taylor LD et al. (1992) Nucl. Acids Res. 20: 6287-6295).
- the recombinant human antibodies are subjected to in vitro mutagenesis (or, if an animal transgenic from human Ig sequences is used, somatic mutagenesis in vivo) and thus the amino acid sequences of the VH and VL regions of the recombinant antibodies are sequences that, because they isolated from human VH and VL human sequences and close to them, cannot exist in vivo in the germinal set of human antibodies in vivo.
- the antigen binding domain of an antibody of the invention is specific for a particular epitope that is carried by a number of antigens, in which case a specific antibody having an antigen binding domain will be capable of specifically binding to different antigens carrying the epitope.
- the monoclonal antibody of the invention specifically binds an epitope of the T chain beta receptor of a human cell receptor belonging to the TRBV9 family, while it does not specifically bind the TCR beta chains of other families and the TCR alpha chain.
- epitope refers to that part of a molecule that is capable of being recognized and bound to an antibody in one or more antigen binding sites of an antibody. Epitopes often consist of chemically active surface groups of molecules, such as amino acids or sugar side chains, and have specific three-dimensional structural characteristics, as well as specific charge characteristics.
- epitope also refers to a portion of a polypeptide that has antigenic and / or immunogenic activity in an animal, preferably a mammal, for example, a mouse, rat, or human.
- antigenic epitope is defined as the portion of a polypeptide to which an antibody can specifically bind, as determined by any method well known in the art, for example, by means of a conventional immune assay. Antigenic epitopes need not be immunogenic, but may also be immunogenic.
- An “immunogenic epitope”, as used herein, is defined as part of a polypeptide that elicits an antibody response in an animal, as established by any method known in the art.
- a “non-linear epitope” or “conformational epitope” contains non-contiguous polypeptides (or amino acids) within the antigenic protein with which the antibody specific for the epitope binds.
- biological property or “biological characteristic” or the terms “activity” or “bioactivity with respect to an antibody and its functional fragments according to the invention are used interchangeably in this application and include, but are not limited to, epitope / antigenic affinity and specificity, ability inhibit or be an antagonist of TCR activity, which includes the beta chain belonging to the TRBV9 family.
- an antibody identified by the prior art includes, for example, cross reactivity (i.e. with non-human homologues of the target peptide or with other proteins or targets, in general), and the ability to maintain high levels of protein expression in mammalian cells.
- the above properties or characteristics may be observed, measured or evaluated using methods recognized in the art, including, but not limited to, ELISA, competitive ELISA, BIACORE, or KINEXA surface plasmon resonance analysis, in vitro or in vivo inhibition assays restrictions, receptor binding, production and / or secretion of a cytokine or growth factor, signal transduction and immunohistochemistry of tissue sections obtained from various sources, including humans, primate or any other source.
- inhibitor or “neutralize”, as used herein, with respect to the activity of an antibody of the invention, mean the ability to significantly counteract, inhibit, prevent, limit, slow down, interrupt, destroy, terminate, reduce, for example, development or the severity of what is inhibited, including, but not limited to, the biological activity of an antibody or property, disease, or condition.
- mutant refers to an antibody disclosed in the present invention in which one or more amino acids are added and / or substituted and / or deleted (deleted) and / or inserted (inserted) at the N-terminus and / or C-terminus and / or within the native amino acid sequences of the antibodies of the present invention or fragments thereof.
- mutant also refers to a nucleic acid molecule that encodes a mutant protein.
- mutant refers to to any option that is shorter or longer than the protein or nucleic acid.
- homology is used to describe the relationship of nucleotide or amino acid sequences to other nucleotide or amino acid sequences, which is determined by the degree of identity and / or similarity between said compared sequences.
- an amino acid or nucleotide sequence is “substantially similar” or “substantially the same” as a reference sequence if the amino acid or nucleotide sequence has at least 85% identity with the specified sequence within the region selected for comparison.
- substantially similar sequences include those that have, for example, at least 90% identity, or at least 91% identity, or at least 92% identity, or at least 93% identity, or at least 94% identity, whether at least 95% identity, or at least 96% identity, or at least 97% identity, or at least 98% identity, or at least 99% identity.
- Two sequences that are identical to one another are also essentially similar.
- the identity of the sequences is determined based on the reference sequence.
- Algorithms for sequence analysis are known in the art, such as IgBLAST described in Ye et al. Nucleic Acids Res. 2013, W34-40.
- IgBLAST described in Ye et al. Nucleic Acids Res. 2013, W34-40.
- a comparison of the nucleotide and amino acid sequences made using the package can be used.
- IgBLAST programs provided by the National Center for Biotechnology Information (https://www.ncbi.nlm.nih.gov/igblast/) using alignment breaks with standard parameters.
- To calculate the percentage of identity the full length of the reference sequence, for example, a variable region, is used.
- nucleotide sequence of the “coding” polypeptide means that the polypeptide is produced from the nucleotide sequence during translation and transcription of mRNA.
- both the coding strand identical to the mRNA and usually used in the list of sequences can be indicated, as well as the complementary strand, which is used as a template for transcription.
- the term also includes any degenerate nucleotide sequences encoding the same amino acid sequence. Nucleotide sequences encoding a polypeptide include sequences containing nitrons.
- the present invention relates to isolated monoclonal humanized antibodies and their functional fragments having the ability to specifically bind to the beta region of the human TRBV9 T receptor family.
- Antibodies according to the invention can be chimeric, humanized or human antibodies, or antigen-binding fragments thereof, and can be used as a medicine for the treatment of AS and other diseases in the pathogenesis of which the TKRs belonging to the TRBV9 family, for example, celiac disease or T-cell lymphoma, are involved.
- the antibody of the invention is monoclonal.
- Monoclonal antibodies according to the invention can be obtained using, for example, hybridoma techniques, a bury known in the art, as well as recombinant technologies, phage display technologies, synthetic technologies, or combinations of such technologies or other technologies well known in the art.
- monoclonal antibody refers to an antibody obtained from a single copy or clone, including, for example, any eukaryotic, prokaryotic or phage clone, and not to a method for its preparation.
- Humanized and chimeric antibodies can be prepared by peptide synthesis or using recombinant DNA techniques as described below in the Nucleic Acids section.
- the antibodies of the present invention are chimeric and are characterized in that they have variable domains of light and heavy chains of non-human origin (e.g., rat or mouse), and constant domains are characteristic of humans.
- non-human origin e.g., rat or mouse
- An antibody of the present invention contains a heavy chain variable domain (VH) with three hypervariable regions
- HCDR1 (according to the Kabat nomenclature) has the amino acid sequence of SEQ ID NO: 1,
- HCDR2 has the amino acid sequence of SEQ ID NO: 2,
- HCDR3 has the amino acid sequence of SEQ ID NO: 3;
- variable domain of the light chain (VL) with three hypervariable regions LCDR1, LCDR2 and LCDR3, in which:
- LCDR 1 has the amino acid sequence of SEQ ID NO: 4,
- LCDR 2 has the amino acid sequence of SEQ ID NO: 5,
- LCDR 3 has the amino acid sequence of SEQ ID NO: 6.
- Kabat nomenclature is used to determine the CDR of antibodies, unless specifically stated otherwise.
- the light and heavy chain variable domains of the antibody of the present invention are humanized and different from the parent and light chain variable domains of the parent antibody by humanizing amino acid substitutions, wherein the antibody heavy and light chain variable domains contain amino acid substitutions in FR fragments of the heavy and light chain variable domains, increasing the degree of humanization of the antibody compared to the parent antibody.
- the antibody heavy chain variable domain of the present invention has the amino acid sequence shown in SEQ ID NO: 16, and differs from the parent antibody heavy chain variable domain, the amino acid sequence of which is shown in SEQ ID NO: 8, by the presence of humanizing amino acid substitutions.
- the antibody heavy chain variable domain of the present invention contains additional amino acid substitutions that do not affect antibody specificity.
- the light chain variable domain of an antibody of the present invention contains amino acid substitutions and has the sequence shown in SEQ ID NO: 18, and differs from the parental antibody heavy chain variable domain, the amino acid sequence of which is shown in SEQ ID NO: 10, by the presence of humanizing amino acid substitutions .
- variable domain of the light chain of an antibody of the present invention contains additional amino acid substitutions that do not affect the specificity of the antibody.
- the monoclonal antibodies of the invention are full-length human IgG antibodies, for example, IgGl or IgG2 or IgG3 or IgG4.
- the antibody of the invention comprises a heavy chain, the amino acid sequence of which is at least 85% identical, or at least 90% identical, or at least 91% identical, or at least at least 92%, or identical, at least 93%, or at least 94%, or at least 95%, or at least 96%, or at least 97%, or at least 98% or at least 99% or 100% identical to the amino acid sequence of SEQ ID NO: 20.
- an antibody of the invention comprises a light chain whose amino acid sequence is at least 85% identical, or at least 90% identical, or at least 91% identical, or at least at least 92%, or identical, at least 93%, or at least 94%, or at least 95%, or at least 96%, or at least 97%, or at least 98% or at least 99% or 100% identical to the amino acid sequence of SEQ ID NO: 22.
- the antibody has a light chain, the amino acid sequence of which is shown in SEQ ID NO: 22, and a heavy chain, the amino acid sequence of which is shown in SEQ ID NO: 20.
- Antibodies according to the present invention may also contain additional mutations that do not lead to a loss in the ability of the antibody to bind the TKR beta chain of the TRBV9 family, but can lead to a decrease in antibody-dependent cell-mediated cytotoxicity or an increase in the affinity or other biological properties of antibodies.
- conservative amino acid substitutions can be made in an antibody sequence.
- conservative substitution in the context of the application is meant a substitution in which the amino acid residue is replaced by another amino acid residue having a close side chain.
- Families of amino acid residues having close side chains are defined in the prior art, including main side chains (e.g., lysine, arginine, histidine), acidic side chains (e.g., aspartic acid, glutamic acid), uncharged polar side chains (e.g. glycine, asparagine, glutamine, serine, threonine, tyrosine, cysteine), non-polar side chains (e.g. alanine, valine, leucine, isoleucine, proline, phenylalanine, methionine, tryptophan), b-branched side chains (e.g. threonine, valine, isoleucine) and aromatic side chains (e.g.
- main side chains e.g., lysine, arginine, histidine
- acidic side chains e.g., aspartic acid, glutamic acid
- uncharged polar side chains e.g. glycine,
- conservative amino acid substitutions are made in the CDR3 regions in the VL and / or VH domains, most often no more than three conservative substitutions.
- conservative substitutions are not made at amino acid positions critical for binding of the epitope of the beta chain of the TRBV9 family.
- variants (mutants) of antibodies according to the invention can be obtained by peptide synthesis or using recombinant DNA techniques as described below in the section "Nucleic acids”.
- the antibody comprises a constant region of a heavy chain, such as a constant region of IgGl, IgG2, IgGS, IgG4, IgA, IgE, IgM, human IgD.
- the constant region of the heavy chain is a constant region of the heavy chain of human IgGl.
- the antibody may contain as a constant region of light chains are either a kappa-constant region of the light chain or a lambda-constant region of the light chain.
- the antibody comprises a kappa constant region of the light chain.
- the antibody heavy chain variable fragment is characterized by a degree of humanization of 84%. In preferred embodiments, the variable fragment of the light chain of the antibody is characterized by a degree of humanization of 85%.
- Antigen binding fragments of the antibodies of the present invention are also provided.
- antigen binding fragment of an antibody refers to one or more fragments of an antibody that retain the ability to specifically bind antigen. It has been shown that the antigen-binding function of an antibody can be carried out by full-length antibody fragments.
- binding fragments encompassed by the term “antigen binding fragment” of an antibody include (a) a Fab fragment, a monovalent fragment consisting of the VL, VH, CL, and CH1 domains; (b) a F (ab ′) 2 fragment, a bivalent fragment containing two Fab fragments linked by a disulfide bridge in the loop region; (c) a Fd fragment consisting of the VH and CH1 domains; (d) an Fv fragment consisting of the VL and VH domains of one arm of an antibody; (d) a dAb fragment (Ward et al.
- single chain antibodies are also encompassed by the term “antigen binding fragment” of an antibody.
- Diabodies are bivalent, bispecific antibodies in which the VH and VL domains are expressed on the same polypeptide chain, but using a linker that is too short to allow two domains to pair on the same chain, causing the domains to pair with complementary domains of the other chain and create two antigen-binding sites (see, for example, Holliger P. et al. (1993) Proc. Natl. Acad. Sci. USA 90: 6444-6448; Poljak RJ et al. (1994) Structure 2: 1121- 1123).
- Antibody fragments such as Fab and F (ab ') 2
- Fab and F (ab ') 2 can be obtained from whole antibodies using accepted methods, such as degradation by papain or pepsin, respectively, of whole antibodies.
- antibodies, antibody fragments, and immunoadhesion molecules can be obtained using standard methods using recombinant DNA.
- An antibody or antigen binding fragment thereof may be part of larger immunoadhesion molecules formed by covalent or non-covalent binding of an antibody or antibody fragment to one or more protein or peptide.
- immunoadhesion molecules include the use of a streptavidin core region to produce a tetrameric scFv molecule (Kipriyanov SM et al. (1995) Human Antibodies and Hybridomas 6: 93-101) and the use of a cysteine residue, a marker peptide and a C-terminal polyhistidine tag to obtain bivalent and reduced scFv biomolecules (Kipriyanov SM et al. (1994) Mol. Immunol., 31: 1047-1058).
- Antibodies and their functional fragments according to the invention are in isolated form, i.e. this means that this protein is essentially free from the presence of other proteins or other natural biological molecules, such as oligosaccharides, nucleic acids and their fragment and the like, where the term “Substantially free” in this case means that less than 70%, usually less than 60% and more often less than 50% of said composition containing the isolated protein is another naturally occurring biological molecule.
- said proteins are present in substantially purified form, where the term “substantially purified form” means a purity of at least 95%, usually equal to at least 97%, and more often equal to at least 99%.
- purification can be carried out by chromatography (for example, ion exchange, affinity, especially affinity for specific antigens — protein A or protein G, and column size chromatography), centrifugation , differential solubility, or any other standard technique for protein purification.
- chromatography for example, ion exchange, affinity, especially affinity for specific antigens — protein A or protein G, and column size chromatography
- centrifugation e.g., a histine tag
- KD dissociation constant
- kdis the experimentally calculated dissociation rate constant
- kop the experimentally calculated rate constant for the association of the antibody-antigen complex.
- Preferred antibodies are those that bind a human antigen with a KD value of not more than about 1 c 10 7 M; preferably not more than about 1 x 10 -8 M; more often not more than about 1 x 10 -9 M; more preferably not more than about 1 c 10 -10 M, and most preferably not more than about 1 x 10 -11 M, for example, not more than about 1 c 10 -12 M
- Antibodies and fragments thereof which can be used in the present compositions and methods, are biologically active antibodies and fragments, that is, they are able to bind the desired antigenic epitopes and exhibit a biological effect directly or indirectly.
- Antibodies and their functional fragments according to the invention are able to specifically bind the epitope (region) of the beta chain of the TRBV9 family.
- inhibition of TCR activity involving said beta chain occurs.
- the inhibition is preferably at least about 20, or 30, or 40, or 50, or 60, or 70, or 80, or 90, or 95% or higher.
- an anti-beta chain antibody of the TRBV9 family of the invention can eliminate T cells carrying TCR containing a beta chain of the TRBV9 family.
- an antibody or fragment thereof according to the invention can provide at least about 20%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, at least about 80%, at least approximately 90%, at least approximately 95%, or approximately 100% elimination of T-lymphocytes.
- the antibody is an MA-043 antibody.
- the MA-043 antibody includes the variable domains of the heavy and light chains that have the amino acid sequences shown in SEQ ID NOs: 16 and 18.
- the MA-043 antibody comprises heavy and light chains that have the amino acid sequences shown in SEQ ID NOs: 20 and 22, respectively.
- the present invention provides nucleic acid molecules encoding the heavy and light chains of the antibodies of the present invention, their functional fragments and variable domains, which can be used to produce chimeric antibodies, including the variable domains of the invention, operatively fused with the known constant domains of human antibodies.
- the nucleic acid of the invention encodes an antibody heavy chain, the variable domain of which comprises 3 hypervariable regions of HCDR1, HCDR2 and HCDR3, where
- HCDR1 (according to Rabat nomenclature) has the amino acid sequence of SEQ ID NO: 1;
- HCDR2 has the amino acid sequence of SEQ ID NO: 2;
- HCDR3 has the amino acid sequence of SEQ ID NO: 3.
- the nucleic acid of the invention encodes an antibody light chain, the variable domain of which contains 3 hypervariable sections LCDR1, LCDR2 and LCDR3, in which:
- LCDR1 has the amino acid sequence of SEQ ID NO: 4;
- LCDR2 has the amino acid sequence of SEQ ID NO: 5;
- LCDR3 has the amino acid sequence of SEQ ID NO: 6.
- the nucleic acid of the invention encodes the variable domains of the heavy and light chains of an antibody that contain amino acid substitutions in FR fragments of the variable domains of the heavy and light chains that increase the degree of humanization of the antibody compared to the parent antibody.
- nucleic acid molecules encoding homologues and mutants of these antibody chains, their functional fragments and domains are also within the scope of the present invention.
- the nucleic acid encodes a heavy chain of an antibody whose variable domain has the amino acid sequence of SEQ ID NO: 16.
- the nucleic acid encodes a light chain of an antibody whose variable domain has the amino acid sequence of SEQ ID NO: 18.
- the nucleic acid encodes a heavy chain of an antibody whose amino acid sequence is at least 85% identical, at least 90% identical, or at least 91% identical, or at least at least 92%, or identical, at least 93%, or at least 94%, or at least 95%, or at least 96%, or at least 97%, or at least 98% or at least 99% or 100% identical to the amino acid sequence of SEQ ID NO: 20.
- the nucleic acid encodes an antibody light chain whose amino acid sequence is identical in at least 85%, or identical, at least 90%, or identical, at least 91%, or identical, at least 92%, or identical, at least 93% , or at least 94% or at least 95% or at least 96% or at least 97%, or at least 98% or at least 99% or 100% identical amino acid sequence of SEQ ID NO: 22 .
- nucleic acids encoding the light and heavy chains of the invention are shown in SEQ ID NO: 19 and 21.
- Nucleic acids encoding the variable domains of the light and heavy chains of antibodies are also of interest. Nucleic acids encoding the variable domains of the heavy and light chains of antibodies can be used for rapid fusion with nucleic acids encoding the corresponding constant domains of antibodies.
- the nucleic acid encodes an antibody heavy chain variable domain, the amino acid sequence of which is shown in SEQ ID NO: 16.
- the nucleic acid encodes the variable domain of the light chain of an antibody, the amino acid sequence of which is shown in SEQ ID NO: 18.
- nucleic acids encoding the variable domains of the heavy and light chains of the antibodies shown in SEQ ID NO: 15 and 17.
- nucleic acid molecule or “nucleic acid” is a DNA molecule, such as a genomic DNA or a DNA molecule, or an RNA molecule, such as an mRNA molecule.
- the nucleic acid molecule of the present invention is a DNA (or to a DNA) molecule containing an open reading frame that encodes an antibody or antibody fragment of the present invention and is capable of under suitable conditions (e.g. physiological intracellular conditions) be used for expression in a heterologous expression system.
- the nucleic acid molecule of the present invention is obtained by genetic engineering. Methods for producing nucleic acids are well known in the art.
- amino acid sequence information or nucleotide sequence information enables the production of the isolated nucleic acid molecules of the present invention using oligonucleotide synthesis.
- nucleic acids that differ from each other due to the degeneracy of the genetic code can be synthesized. Methods for selecting codon variants for a desired host are well known in the art.
- Synthetic oligonucleotides can be prepared using the phosphoramidite method, and the resulting constructs can be purified using methods well known in the art, such as high performance liquid chromatography (HPLC) or other methods as described, for example, in Sambrook et al., Molecular Cloning: A Laboratory Manual, 2nd Ed., (1989) Cold Spring Harbor Press, Cold Spring Harbor, NY, and following instructions described, for example, in the United States Dept of HHS, National Institute of Health (NIH) Guidelines for Recombinant DNA Research.
- HPLC high performance liquid chromatography
- the long double-stranded DNA molecules of the present invention can be synthesized as follows: several smaller fragments with the necessary complementarity can be synthesized, which contain suitable ends capable of cohesion with the adjacent fragment. Adjacent fragments can be crosslinked using DNA ligase or a PCR based method.
- nucleic acid molecules of the present invention can also be cloned from biological sources.
- the present invention also encompasses nucleic acids that are homologous, substantially similar, identical, or derived from nucleic acids encoding the polypeptides of the present invention.
- nucleic acids of the invention are located in a medium different from the environment in which they are found under natural conditions, for example, they are isolated, present in an increased amount, are or are expressed in vitro systems or in cells or organisms other than those in which they are located in vivo.
- Changes or differences in the nucleotide sequence between highly similar nucleotide sequences can represent nucleotide substitutions in the sequence that occur during normal replication or duplication. Other substitutions can be specifically calculated and inserted into the sequence for specific purposes, such as changing the codons of certain amino acids or the nucleotide sequence of a regulatory region. Such special substitutions can be made in vitro using various mutagenesis technologies or obtained in host organisms under specific breeding conditions that induce or select these changes. Such specially derived sequence variants may be called “mutants” or “derivatives” of the original sequence.
- Mutant or derivative nucleic acids or nucleic acid variants can be obtained on a matrix nucleic acid selected from the above nucleic acids by modifying, deletion or addition of one or more nucleotides in a matrix sequence or combination thereof, to obtain a variant of the matrix nucleic acid. Modifications, additions or deletions can be performed by any method known in the art (see, for example, Gustin et al., Biotechniques (1993) 14: 22; Barany, Gene (1985) 37: 111-123; and Colicelli et al., Mol. Gen. Genet. (1985) 199: 537-539, Sambrook et al., Molecular Cloning: A Laboratory Manual, (1989), CSH Press, pp.
- Modifications, additions or deletions can also be performed by a method including recombination, recursive recombination of sequences, phosphotioate-modified DNA mutagenesis, mutation on a uracil-containing matrix, double-pass mutagenesis, point-mutation reductive mutagenesis, strain mutagenesis, recovery-deficient mutagenesis, radioactive mutagenesis, deletion mutagenesis, restriction-selective mutagenesis, restriction mutagenesis with purification, synthesis of artificial genes, multiple mutagenesis, the creation of chimeric multiple nucleic acids and combinations thereof.
- Degenerate variants of nucleic acids that encode the proteins of the present invention are also provided.
- Degenerate nucleic acid variants include substitutions of nucleic acid codons for other codons encoding the same amino acids.
- degenerate nucleic acid variants are created to increase expression in the host cell.
- nucleic acid codons that are not preferred or less preferred in the genes of the host cell are replaced by codons that are abundantly represented in the coding sequences of the genes in the cell- a host where said substituted codons encode the same amino acid.
- modifications do not essentially change the properties of antibodies and their functional fragments, but can facilitate protein folding in the host cell, reduce the ability to aggregate, or modulate other biochemical properties of proteins, for example, half-life. In some embodiments, these modifications do not alter the biochemical properties of the protein. In some embodiments, these modifications result in a decrease in the immunogenicity of antibodies. All types of modifications and mutations mentioned above are carried out at the nucleic acid level.
- the claimed nucleic acids can be isolated and obtained essentially in purified form.
- Essentially purified form means that the nucleic acids are at least about 50% pure, usually at least about 90% pure and usually are “recombinant”, that is, flanked by one or more nucleotides with which it is usually not linked on the chromosome found naturally in its natural host organism.
- nucleic acids that encode fusion proteins comprising the protein of the present invention, or fragments thereof, which are discussed in more detail below.
- Nucleic acids encoding the variable domains of the invention can be operatively fused to nucleic acids encoding the corresponding constant domains of the light and heavy chains of an antibody.
- Nucleic acids encoding the light and heavy chains of an antibody can be rapidly fused to nucleic acids encoding a leader (signal) peptide that facilitates the transport of expression products from the host cell. The leader peptide is subsequently cleaved during maturation of the polypeptide.
- a vector and other nucleic acid constructs containing the claimed nucleic acids are also provided.
- the term “vector” includes a nucleic acid molecule capable of transporting another nucleic acid with which it is operatively linked. Certain vectors are capable of autonomous replication in the host cell into which they are introduced, while the remaining vectors can be integrated into the genome of the host cell and thus are replicated along with the host genome. Moreover, certain vectors are capable of directing the expression of genes with which they are operatively linked. Such vectors are referred to in this application as “recombinant expression vectors” (or, simply, “expression vectors” or “expression vectors”), and illustrative burial vectors are known in the art.
- Suitable vectors include viral and non-viral vectors, plasmids, cosmids, phages, etc., preferably plasmids, and are used for cloning, amplification, expression, transfer, etc., of the nucleic acid sequence of the present invention in a suitable host.
- the selection of a suitable vector is understandable for a qualified specialist in this field.
- a full-length nucleic acid or part thereof is typically inserted into a vector by attachment of a DNA ligase to a restriction enzyme cleaved site in a vector.
- the desired nucleotide sequence can be inserted by in vivo homologous recombination, usually by attaching homologous regions to a vector on the flanks of the desired nucleotide sequence.
- Homologous sites are added by ligation of oligonucleotides or polymerase chain reaction, using primers including, for example, both homologous regions and part of the desired nucleotide sequence.
- a vector as a rule, has an origin of replication, which ensures its reproduction in host cells as a result of its introduction into the cell as an extrachromosomal element.
- the vector may also contain regulatory elements that provide expression of the nucleic acid in the host cell and obtain the desired polypeptide.
- said nucleic acid is operably linked to a regulatory sequence, which may include promoters, enhancers, terminators, operators, repressors and inducers, as well as a start codon of the polypeptide.
- the nucleic acid of the invention is also operably linked to a leader peptide that isolates the expression product from the host cell into the extracellular space.
- the claimed polypeptides e.g., light and heavy chains of an antibody of the invention or variable domains of light and heavy chains of an antibody of the invention
- the expression cassette may exist as an extrachromosomal element or may be incorporated into the genome of a cell by introducing said expression cassette into the cell.
- the protein product encoded by the nucleic acid of the invention is expressed in any convenient expression system, including, for example, bacterial systems, yeast, plants, insects, amphibians, or mammalian cells.
- the target nucleic acid is operatively linked to regulatory sequences, which may include promoters, enhancers, termination sequences, operators, repressors and inducers, as well as the start codon of the polypeptide.
- the nucleic acid of the invention is also operably linked to a leader peptide that isolates the expression product from the host cell into the extracellular space.
- a leader peptide that isolates the expression product from the host cell into the extracellular space.
- the above expression systems can be used in prokaryotic or eukaryotic hosts.
- host cells such as E. coli, B. subtilis, S. cerevisiae, insect cells in combination with baculovirus vectors, or higher cells, such as yeast cells, plant cells, vertebrate cells, mammalian cells, can be used.
- human cells e.g. CHO cells (e.g., ATCC CRL-9096), NS0 cells, SP2 / 0 cells, HEK293 cells, COS cells (e.g., ATCC CRL-1650, CRL-1651) and HeLa (e.g., ATCC CCL-2 )
- a host cell is transformed with an expression vector comprising a nucleic acid encoding an antibody light chain and an expression vector comprising a nucleic acid encoding an antibody heavy chain.
- an expression vector comprising a nucleic acid encoding an antibody light chain and an expression vector comprising a nucleic acid encoding an antibody heavy chain.
- a single expression vector is used in which nucleic acids encoding both the light and heavy chains of an antibody are inserted.
- the expression vector (s) encoding the heavy and light chains are transformed (co-transformed) into a host cell such that the light and heavy chains are expressed in the host cell and are preferably secreted in the medium in which the host cells are cultured, antibodies can be isolated from this medium.
- transformation are intended to include a wide range of methods commonly used for introducing exogenous DNA into a prokaryotic or eukaryotic host cell, for example, electroporation, precipitation with calcium phosphate, transfection with DEAE-dextran, etc., as described by Sambrook, Fritsch and Maniatis (eds) Molecular Cloning; A Laboratory Manual, Second Edition, Cold Spring Harbor, NY (1989; Ausubel FM et al. (Eds.) Current Protocols in Molecular Biology, Green Publishing Associates (1989).
- the antibodies When recombinant expression vectors containing nucleic acids of an antibody are introduced into the host cells, the antibodies are formed by culturing the host cells for a period of time sufficient to express the antibody in the host cell, or (more preferably) secreting the antibody into the culture medium, which host cells are grown.
- Antibodies can be isolated from the culture medium using standard protein purification methods. Culturing conditions for various cells are well known to those skilled in the art and are described, for example, in Current Protocols in Cell Biology, ed. Bonifacino J.S., Dasso M., Harford J.B., Lippincott-Schwartz J. and Yamada K.M., John Wiley & Sons, Inc., 2000.
- the resulting replicated nucleic acid, expressed protein or polypeptide is within the scope of the invention as a product of the host cell or organism.
- the product may be isolated by a suitable method known in the art.
- Cell lines that stably express the proteins of the present invention can be selected by methods known in the art (e.g., co-transfection with a selectable marker, such as dhfr, gpt, neomycin, hygromycin, which makes it possible to identify and isolate transfected cells that contain gene included in the genome).
- the nucleic acid molecules of the present invention can also be used to determine gene expression in a biological sample.
- a method in which cells are examined for the presence of specific nucleotide sequences, such as genomic DNA or RNA, is well established in the art. Briefly, DNA or mRNA is isolated from a cell sample. mRNA can be amplified by RT-PCR using reverse transcriptase to form a complementary strand of DNA, followed by amplification using a polymerase chain reaction using primers specific for the declared DNA sequences. Alternatively, the mRNA sample is separated by gel electrophoresis, transferred to a suitable carrier, for example, nitrocellulose, nylon, etc., and then tested with a fragment of the claimed DNA as a sample.
- a suitable carrier for example, nitrocellulose, nylon, etc.
- oligonucleotide crosslinking assays such as in situ hybridization and hybridization with DNA probes immobilized on a solid chip. Detection of mRNA hybridizing with the claimed sequence indicates gene expression in the sample.
- the antibody or active fragment thereof of this invention is used in the treatment of disorders that are associated with the activity of pathological T-lymphocytes bearing on the surface of TCR family TRBV9, for example, with the activity of autoimmune T-lymphocytes in AS, celiac disease, T-cell lymphomas.
- the term "patient” in this application refers to a mammal, including, but not limited to, mice, monkeys, humans, mammals, farm animals, mammals, sports animals and mammals of domestic animals; preferably, the term refers to people.
- the patient is further characterized by a disease or disorder, or condition, mediated by the presence of TCR in his body, the beta chain of which belongs to the TRBV9 family.
- TCR whose beta chain belongs to the TRBV9 family
- AS and celiac disease can be associated with the development of a number of blood diseases, such as T cell lymphoma caused by the Epstein-Barr virus.
- co-administration refers to or include:
- An antibody of the invention may be administered without additional therapeutic treatment, i.e. as an independent therapy.
- the antibody treatment of this invention may include at least one additional therapeutic treatment (combination therapy).
- the antibody may be co-administered or formulated with another medication / drug for an autoimmune or oncological disease in the pathogenesis of which TCRs containing the beta chain are involved TRBV9, for example, AS, celiac disease, T-cell lymphoma, T-cell leukemia.
- the antibody of this invention will be administered in an amount effective to treat the condition in question, i.e. in doses and for periods of time necessary to achieve the desired result.
- the therapeutically effective amount may vary depending on factors such as the particular condition being treated, the patient’s age, gender and weight, and whether the administration of the antibody is an independent treatment or in combination with one or more additional immunosuppressive or anti-inflammatory methods treatment.
- Drug regimens can be adjusted to provide the optimal desired response. For example, a single bolus may be administered, several divided doses may be administered over time, or the dose may be proportionally reduced or increased depending on the severity of the therapeutic situation. Particularly useful is the manufacture of parenteral compositions in unit dosage form for ease of administration and uniformity of dosage.
- the unit dosage form refers to physically discrete units suitable as unit doses for patients / subjects to be treated; each unit contains a predetermined amount of the active compound, calculated to produce the desired therapeutic effect in combination with the desired pharmaceutical carrier.
- unit dosage forms of the present invention is generally dictated and directly depends on (a) the unique characteristics of the chemotherapeutic agent and the particular therapeutic or prophylactic effect to be achieved, and (b) the limitations inherent in the compounding technique of such an active compound to treat sensitivity in subjects.
- the dose and dosage regimen are adjusted in accordance with methods well known in the therapeutic field.
- the maximum tolerated dose can be easily set and an effective amount can also be determined to provide a detectable therapeutic effect for the patient, as well as the time requirements for the administration of each agent to achieve a visible therapeutic effect for the patient.
- some dosages and regimen regimens are given as examples herein, these examples in no way limit the dosages and modes of administration that may be necessary for a patient to practice using the present invention.
- dosage values may vary, depending on the type and severity of the condition, which should be alleviated, and may include one or more doses.
- specific administration schemes should be adjusted after some time according to individual needs and at the discretion of the medical professional who administers or controls the administration of the compositions, and that the concentration ranges given in this description are only given as an example and are not intended to limit the scope or practice of the claimed compositions.
- the dosage regimen with the compositions of this invention can be based on various factors, including the type of disease, age, weight, gender, patient health status, severity of the condition, route of administration, and the specific antibody used. Thus, the dosage regimen can vary widely, but can be determined regularly using standard methods.
- doses may be adjusted based on pharmacokinetic and pharmacodynamic parameters, which may include clinical effects, such as toxic effects or laboratory values.
- the present invention encompasses an individual dose increase, which is determined by a qualified specialist. Determination of the required dose and modes are well known in the relevant field of technology and will be clear to a person skilled in the art after familiarization with the ideas disclosed herein.
- a suitable dose of an antibody of the invention will be in the range of 0.1-200 mg / kg, preferably 0.1-100 mg / kg, including about 0.5-50 mg / kg, for example, about 1- 20 mg / kg.
- An antibody can be administered, for example, at a dose of at least 0.25 mg / kg, for example at least 0.5 mg / kg, including at least 1 mg / kg, for example at least 1, 5 mg / kg, for example, as well as at least 2 mg / kg, for example at least 3 mg / kg, including at least 4 mg / kg, for example at least 5 mg / kg; and, for example, up to a maximum of 50 mg / kg, including up to a maximum of 30 mg / kg, for example, up to a maximum of 20 mg / kg, including up to a maximum of 15 mg / kg.
- compositions for example, once a week, once every two weeks, once every three weeks, or once every four weeks, and for as long as it is deemed appropriate by the responsible physician, who may in some cases increase or reduce the dose if necessary.
- An antibody of the invention may be included in a pharmaceutical composition suitable for administration to a patient.
- Antibodies of the invention may be administered alone or in combination with a pharmaceutically acceptable carrier, diluent and / or excipient in single or multiple doses.
- the pharmaceutical compositions for administration are designed to meet the selected mode of administration, and pharmaceutically acceptable diluents, carriers and / or excipients such as dispersing agents, buffers, surfactants, preservatives, solubilizing agents, isotonic agents, stabilizers, etc. . used properly.
- compositions are developed in accordance with traditional methods described in, for example, Remington, The Science and Practice of Pharmacy, 19th Edition, Gennaro, Ed., Mack Publishing Co., Easton, PA 1995, which describes various methods for preparing the compositions, generally known to specialists.
- “Medicinal product (preparation)” a substance or mixture of substances in the form of a pharmaceutical composition in the form of tablets, capsules, powders, lyophilisates, injections, infusions, ointments and other formulations intended to restore, correct or alter physiological functions in humans and animals as well as for the treatment and prevention of diseases, diagnostics, anesthesia, contraception, cosmetology and other things. Any method of administering peptides, proteins, or antibodies adopted in the art can be suitably used for an antibody of the invention.
- pharmaceutically acceptable means one or more compatible liquid or solid components that are suitable for administration to a mammal, preferably a human.
- excipient or “excipient” is used herein to describe any component other than previously described in this invention. These are substances of inorganic or organic origin, used in the production process, the manufacture of drugs to give them the necessary physical and chemical properties.
- buffer By the term “buffer”, “buffer composition”, “buffer agent” is meant a solution capable of maintaining a pH value due to the interaction of the acid and alkaline components included in its composition, which allows the antibody preparation to be resistant to pH changes. In general, pH values of the pharmaceutical composition of 4.0 to 8.0 are preferred.
- buffering agents for example, acetate, phosphate, citrate, histidine, succinate and the like can be used. buffer solutions, but not limited to them.
- tonic agent refers to an excipient that can apply the osmotic pressure of a liquid antibody preparation.
- An “isotonic” drug is a drug that has an osmotic pressure equivalent to that of human blood. Isotonic preparations typically have an osmotic pressure of about 250 to 350 mOsm / kg.
- isotonic agents polyols, mono- and disaccharides, amino acids, metal salts, for example, sodium chloride, etc., can be used, but not limited to.
- stabilizer is meant an auxiliary substance or a mixture of two or more auxiliary substances that provide the physical and / or chemical stability of the active agent.
- amino acids can be used, for example, arginine, histidine, glycine, lysine, glutamine, proline, but not limited to them; surfactants, e.g.
- Polysorbate 20 (trade name Tween 20), Polysorbate 80 (trade name Tween 80), polyethylene-polypropylene glycol and its copolymers (trade names Poloxamer, Pluronic), sodium dodecyl sulfate (SDS ), but not limited to them; antioxidants, for example, methionine, acetylcysteine, ascorbic acid, monothioglycerol, salts of seric acids, and the like, but not limited to; chelating agents, for example, but not limited to ethylenediaminetetraacetic acid (EDTA), diethylene triamine pentaacetic acid (DTPA), sodium citrate and the like.
- EDTA ethylenediaminetetraacetic acid
- DTPA diethylene triamine pentaacetic acid
- the pharmaceutical composition is “stable” if the active agent retains its physical stability and / or chemical stability and / or biological activity during the stated shelf life at a storage temperature, for example, at 2-8 ° C.
- the active agent retains both physical and chemical stability as well as biological activity.
- the storage period is selected based on the results of stability studies during accelerated and natural storage.
- a pharmaceutical composition containing a monoclonal antibody of the invention can be administered to a patient having pathologies as described herein using standard administration methods, including oral, intravenous, intraperitoneal, subcutaneous, pulmonary, transdermal, intramuscular, intranasal, buccal, sublingual or using suppositories.
- the pharmaceutical composition of the invention preferably contains or is a “therapeutically effective amount” of an antibody of the invention.
- a “therapeutically effective amount” refers to an amount effective at dosages and for periods of time necessary to achieve the desired therapeutic result.
- a therapeutically effective amount of an antibody may vary depending on factors such as the condition of the disease, the age, gender and weight of the individual, and the ability of the antibody or part of the antibody to elicit the desired response in the individual.
- a therapeutically effective amount is also an amount in which the therapeutically beneficial effect of the antibody prevails over the toxic or harmful effect.
- a “prophylactically effective amount” refers to an amount effective at dosages and for periods of time necessary to achieve the desired prophylactic result. Since a prophylactic dose is used for individuals before or at an early stage of the disease, typically a prophylactically effective amount may be less than a therapeutically effective amount.
- a therapeutically effective or prophylactically effective amount is at least the minimum dose, but less than the toxic dose of the active agent, necessary to provide therapeutic benefits to the patient.
- a therapeutically effective amount of an antibody of the invention is an amount that, in mammals, preferably humans, reduces the biological activity of autoimmune clones, for example, by binding to TCR, the beta chain of which belongs to the TRBV9 family, where the presence of these clones causes or contributes to undesirable pathological effects, or decreased levels of TCR, the beta chain of which belongs to the TRBV9 family, causes a beneficial therapeutic effect in a mammal, preferably a human.
- the route of administration of the antibodies of the invention may be oral, parenteral, by inhalation, or topical.
- antibodies of the invention may be incorporated into a pharmaceutical composition suitable for parenteral administration.
- parenteral as used in this application includes intravenous, intramuscular, subcutaneous, rectal, vaginal or intraperitoneal administration.
- Advantageous is the introduction by intravenous or intraperitoneal, or subcutaneous injection. Suitable carriers for such injections are directly known in the art.
- compositions must be sterile and stable under the conditions of manufacture and storage in a container that is provided, including, for example, a hermetically sealed vial (ampoule) or syringe. Therefore, pharmaceutical compositions can be sterile filtered after preparation, or otherwise made microbiologically suitable.
- a typical composition for intravenous infusion may have a volume of 250-1000 ml of liquid, such as sterile Ringer's solution, physiological saline, dextrose solution and Hank's solution, and a therapeutically effective dose (for example, 1-100 mg / ml or more) of antibody concentration. The dose may vary depending on the type and severity of the disease.
- the dosages for any of the patients depend on many factors, including patient size, body surface area, age, specific compound to be administered, gender, time and route of administration, general health and other medications that are administered simultaneously.
- a typical dose may be, for example, in the range of 0.001-1000 ⁇ g; however, doses below or above this illustrative range are anticipated, especially given the above factors.
- the dosage regimen of daily parenteral administration may be from 0.1 ⁇ g / kg to 100 mg / kg of total body weight, preferably from 0.3 ⁇ g / kg to 10 mg / kg, and more preferably from 1 ⁇ g / kg to 1 mg / kg, even more preferably from 0.5 to 10 mg / kg of body weight per day.
- the treatment process can be monitored by periodically evaluating the patient's condition. For repeated administration over several days or longer, depending on the condition of the patient, the treatment is repeated until the desired response is achieved or the symptoms of the disease are suppressed.
- other dosage regimens that are not described in this application may also be used.
- the desired dosage may be administered by single-pole administration, multiple bolus administrations, or by continuous infusion of an antibody, depending on the pharmacokinetic decay sample that the practitioner wants to achieve.
- the therapeutic agents of the invention can be frozen or lyophilized and reconstituted before use in a suitable sterile vehicle. Lyophilization and recovery can lead to varying degrees of loss of antibody activity. Dosages may be adjusted to compensate for this loss. In general, pH values of the pharmaceutical composition of 6 to 8 are preferred.
- a further embodiment of the invention is a product that contains products used to treat autoimmune diseases and related conditions and malignant blood diseases, in the pathogenesis of which are involved TKRs carrying the beta chain of the TRBV9 family.
- diseases include, for example, AS, celiac disease, T-cell leukemia, T-cell lymphoma and others.
- the product is a container with a label and a leaflet, which can be placed in a blister and / or pack.
- Suitable containers are, for example, vials, ampoules, syringes, etc.
- Containers can be made of various materials, such as glass or polymeric materials.
- the container contains a composition effective to treat a particular condition, and may have a sterile inlet channel). At least one active ingredient in the composition is an antibody of the invention.
- the label and package insert indicate that the drug is used to treat a specific condition.
- the label and / or package leaflet must additionally contain instructions for administering the antibody composition to the patient, including information on the indications, use, dose, route of administration, contraindications and / or precautions regarding the use of such therapeutic products.
- the package insert indicates that the composition is used for treatment to indicate what.
- the product may include other products necessary from a commercial point of view and from the point of view of the consumer, for example, but not limited to solvents, diluents, filters, needles and syringes.
- the invention also relates to kits that can be used for various purposes, for example, to assess the ability to destroy T cells carrying TKR family TRBV9, for purification or immunoprecipitation of the TRBV9 receptor from cells.
- the kit may contain an antibody bound to granules (e.g., sepharose granules).
- the kit contains a container and a label and a package leaflet.
- the antibodies of the present invention are also used for diagnostic purposes (e.g., in vitro, ex vivo).
- an antibody can be used to detect or measure the level of T lymphocytes containing TRBV9 TCR family in samples obtained from a patient, for example, a tissue sample or a sample of body fluid, such as inflammatory exudate, blood, intestinal fluid, saliva or urine.
- Suitable detection and measurement methods include immunological methods such as flow cytometry, enzyme-linked immunosorbent assay (ELISA), chemiluminescent analysis, radioimmunoassay and immunohistology.
- the invention further includes kits, for example, diagnostic kits containing the antibodies described herein.
- variable domains of the heavy and light chains of the antibody aHTn-TRBV9-2 As the parent (reference) sequences of the variable domains of the heavy and light chains of the antibody aHTn-TRBV9-2, the amino acid sequences of which are shown in SEQ ID Nos: 8 and 10 were used.
- variable domains of the heavy and light chains were compared with a pool of germline sequences of the variable domains of human immunoglobulins, germline sequences of the variable domains of rat immunoglobulins, sequences of mature human and rat antibodies obtained both from open sources and from a donor library provided by Biocad ( Russia). For analysis, we used the Ylab software package (Biocad, Russia).
- the humanized nucleotide sequences HCVR and LCVR (SEQ ID Nos: 15 and 17) were synthesized de novo and cloned into pEE-HC, pEE-SK vectors, IgGl format (Xu et al. Front. Chem. Sci. Eng. 2015, 9 ( 3): 376-380) at the restriction sites Sall / Nhel and Sall / BsiWI, respectively.
- the nucleic acid sequences of the light and heavy chains obtained were verified by Senger sequencing.
- the MA-043 antibody was selected, the amino acid and nucleotide sequences of the light and heavy chains of which are shown in SEQ ID Nos: 19-22.
- the MA-043 antibody includes the variable domains of the heavy and light chains that have the amino acid sequences shown in SEQ ID NOs: 16 and 18.
- the degree of humanization of the variable domain of the heavy chain of the MA-043 antibody was 84%, and the degree of humanization of the variable domain of the light chain was 85% (Table 1).
- the constant domain of the heavy chain is represented by the IgGl allotype Gm3 format.
- Example 2 Obtaining a recombinant antibody and determining its affinity
- the vectors containing nucleic acids encoding the light and heavy chains of the MA-043 antibody, obtained as described in Example 1, were obtained in E.coH cells and purified using a plasmid DNA purification reagent manufactured by Qiagen (Germany) and used for transfection cell line CHO-Fut8 using linear polyethyleneimine (PEI "MAX", "Polysciences", USA) according to the manufacturer's instructions.
- the resulting reaction mixtures were incubated at 37 ° C on a rocking chair. 9 days after transfection, the culture fluid was separated from the cells by filtration through a filter with a pore size of 0.5 / 0.22 ⁇ m.
- the culture fluid was used to isolate antibodies using affinity chromatography on 0.2 ml PreDictor RoboColumn MabSelect SuRe columns (GE Healthcare, USA), balanced with phosphate-buffered saline (FSB, pH 7.4). Then the column was washed with 5 volumes of FSB. The carrier-bound protein was eluted using 0.1 M pH 3 glycine buffer. The main peak containing protein was collected and the pH adjusted to neutral with 1 M Tris buffer (pH 7.5). All stages were carried out at a flow rate of 110 cm / h. Next, the protein was transferred to PBS (pH 7.4) using dialysis, filtered through a 0.22 ⁇ m filter, transferred to new sterile tubes. The quality of the release was evaluated using 12% PAAG electrophoresis under denaturing conditions.
- Quantification was carried out using measurements on a NanoDrop2000 microspectrophotometer at 280A.
- the isolated protein was stored at -70 ° C.
- Determination of antibody affinity was performed on an OctetRed 96 instrument (ForteBio, USA).
- Antigen at a concentration of 20 ⁇ g / ml was immobilized on the surface of AR2G sensors (ForteBio) according to the standard protocol according to the manufacturer's instructions.
- Analysis carried out at 30 ° C using FSB containing 0.1% Tween-20 and 0.1% BSA as a working buffer. After the baseline was prescribed in the buffer solution, the sensors were immersed in wells with an antibody solution for 300 sec, where the complex was associated. Then, the dissociation of the complex in the buffer solution was detected for 600 seconds.
- the binding curves with the deduction of the reference signal were analyzed using the Octet Data Analysis software (version 9.0) according to the standard procedure using the 1: 1 Global interaction model.
- Example 3 Obtaining a cell line stably producing antibody e IgGl format, and the production of antibodies.
- the heavy and light chain sequences of the MA-043 antibody were obtained as described in Example 1 and cloned into pSX vectors at the Hindlll, Xbal restriction sites.
- the obtained plasmids were obtained in E. coli cells and isolated using a BenchPro 2000 device (Life Technology, USA) according to the manufacturer's instructions in the amount of 600-700 ⁇ g. Plasmids were linearized overnight using Pvul endonuclease, then ethanol precipitated, the precipitate was dissolved in water, the concentration in the final volume was 900-1100 ng / ⁇ l.
- the CHO-K1-S cell line was cultured in Ham's F12 Gibco medium (Thermo, USA).
- Transfection with genetic constructs containing MA-043 coding sequences was performed by electroporation on a Nucleofector TM instrument (Lonza, Switzerland) according to the manufacturer's protocol. The next day after transfection, antibiotic selection of transfected cells was performed for 24 days by adding puromycin (final concentration of 7.2 ⁇ g / ml) and hygromycin B (final concentration of 640 ⁇ g / ml) to the medium. Then, homogeneous in structure antibiotic-resistant cell clones expressing at a high level of MA-043 were selected.
- the preclinical monoclonal antibody MA-043 was produced in a 50 L HyClone single-use bioreactor fermenter (Thermo Fisher Scientific). Removal of producer cells from the culture fluid was performed using a Millistak C0HC depth filter (Merck-Millipore, USA). The primary purification of the antibody from the clarified culture fluid was carried out on an affinity sorbent with protein A. Specific elution of the target protein was carried out under acidic conditions of pHZ.Z-Z.8 in glycine buffer. The resulting eluate was kept at an acidic pH for 30-60 minutes for viral inactivation, and then neutralized with a 1M Tris-HCl solution to a pH of 6.5-7.0.
- the final chromatographic purification in slip mode was performed on a CaptoAdhere sorbent (GE Healthcare LifeSciences, USA). For this, the protein solution was passed through a prepared sorbent, balanced with Tris buffer with a pH of 6, 5-7.0 at a low conductivity value ( ⁇ 3 mS / cm 2 ).
- the purified protein was subjected to antiviral filtration using a Viresolve PRO filter kit (Millipore, USA), concentration and diafiltration against a final buffer containing acetate buffer (pH 5, 0-5, 5) and trehalose.
- Example 4 The use of antibodies for specific binding to a fragment of the beta chain of the T cell receptor family of receptors TRBV9
- Antibodies were labeled with fluorescein using the fluorescein isothiocyanate reagent (Sigma, USA) according to the manufacturer's protocol.
- the number of fluorophores that reacted with the antibody molecules was controlled by the ratio of the absorption spectrum at wavelengths of 495/280 nm.
- T lymphocytes were obtained from the peripheral blood of a healthy donor. Blood was collected in Vacuette tubes with EDTA (2x9 ml each), the mononuclear fraction according to the standard procedure described in (Kovalchuk L.V. et al. Immunology: Workshop - 2010. - 176 p.). After isolation, cells were transferred to phosphate-buffered saline (PBS) containing 0.5% bovine serum albumin (BSA) and 2 mM EDTA. The total number of cells and their viability was determined by the method of staining with trypan blue as described by Lang N.R. (Stimulation of lymphocytes M.: Medicine, 1976.-288 s).
- PBS phosphate-buffered saline
- BSA bovine serum albumin
- RNA samples obtained in duplicate from populations “TRBV9 +” and “TRBV9-” were used to isolate total RNA and sequence sequencing of TCR beta chains.
- the obtained cell fractions were placed in an RLT buffer (Quagen, Germany) and RNA was isolated from them using the Quiagen RNAeasy mini kit # 217004 reagent kit (Quagen) according to the manufacturer's protocol. Fragments of the beta-chain of the T receptor were synthesized to DNA on an isolated RNA matrix according to the protocol described by Britanova et al (J Immunol, 2016, 196 (12) 5005-5013) using the Mint cDNA synthesis kit (Eurogen, Russia).
- Illumina adapters USA were ligated to the developed amplicons and sequenced on the MiSeq Illumina platform according to sequencer manufacturer protocol. Sequencing data was analyzed using the programs MiGEC, MiXCR and VDJtools, presented on the website on the Internet: https://milaboratory.com. An analysis of the obtained repertoires of TCR beta chains showed that the libraries obtained by sorting using the MA-043 antibody were enriched by 91% sequences that were encoded by the TRBV9 gene segment. Whereas in the repertoires of beta chains of the negative fraction “TRBV9-”, sequences containing TRBV9 were not found.
- Monoclonal antibody MA-043 was obtained as described in Example 3.
- a mononuclear fraction of human blood was obtained as described in Example 4.
- NK cells were isolated from a portion of the mononuclear fraction using a reagent kit for the isolation of human NK cells # 130-092-657 (Miltenyi biotec, USA). Used the manufacturers protocol. The quality of NK cell isolation was assessed by cytofluometry (BD FACS ARIA III, USA) using labeled antibodies CD16-FITC, CD56-PE, CD3-VioBlue. Enrichment of NK cells was 85-95%.
- an MA-043 antibody was added to an aliquot of a mononuclear fraction containing 1 x 10 6 cells to a final concentration of 500 ng / ml. Remicade antibodies in the same concentration as MA-043 were used as a negative control. Antibodies were not added to the control aliquot of cells (positive control). Also, 10 5 NK cells were added to all reaction mixtures. The final reaction volume was 100 ⁇ l. The reaction mixtures were incubated at room temperature for one hour, then the cells were washed several times from antibodies and spread into the wells of a 96-well round bottom plate on the table.
- T lymphocytes After 6 days, cells were harvested from the wells and used for immunophenotypic analysis using flow cytometry. The following antibodies were used to detect T lymphocytes: anti-CD3-eFluor450 (OCTZ clone, eBioscience); anti-CD8-PC7 (clone SFCI21Thy2D3, Beckman Coulter, USA); MA-043, labeled Fite.
- anti-CD3-eFluor450 OCTZ clone, eBioscience
- anti-CD8-PC7 clone SFCI21Thy2D3, Beckman Coulter, USA
- MA-043, labeled Fite MA-043, labeled Fite.
- CD3 + MA-043 + T lymphocytes were not detected in samples incubated with the MA-043 antibodies of the present invention.
- the target population of CD3 + CD6 + did not change compared to the “zero control”. This indicates that screening of the epitope by unlabeled antibodies on day 6 does not occur and confirms the ability of MA-043 antibodies to eliminate cells bearing TCR family TRBV9.
- Example 6 Obtaining a pharmaceutical composition containing an antibody according to the invention
- the pharmaceutical composition was prepared by standard methods known in the art.
- the components of the pharmaceutical composition are shown in Table 3. Table 3. The concentration of the components of the pharmaceutical composition
- Example 7 Kit containing a pharmaceutical composition with antibodies
- kits with a dosage form containing a composition with MA-043 antibody the pharmaceutical composition obtained according to example 6 is sealed in 1 ml ampoules or syringes under sterile conditions, labeled and packaged in containers made of plastic or cardboard material.
- instructions for use are placed in the container with the ampoule.
- Sly Trp lie Asn Thr Tyr Thr Sly Thr Pro Thr Tyr Ala Asp Asp Phe
- Leu Slo lie Ser Asn Leu Lys Asn Slu Asp Thr Ala Thr Tyr Phe Cys
- caggtgcasc ttgttcsgtc ggggcctgaa cttaagaagc caggggaaag tgtaaagtg 68 agetgcaaag cctcaggcta cacgtttacc gattatcttg tgcattgggt tagaca gct 128 ccaggtaagg gactggaatg gatgggatgg atcaatacct ataeagggac acccacatat 288 gccgatgact tigagggacg gtttgtcttc tcacttgata ccagtgcgtc csctgctaac 248 ctccagatat gcagcctgaa gaatgaggac acegecacct attactgcgc ccgatcatgg 388 aggagaggcc t3cgagg
- Sly Trp lie Asn Thr Tyr Thr Gly Thr Pro Thr Tyr Ale Asp Asp Phe
- Sly Trp lie Asn Thr Tyr Thr Sly Thr Pro Thr Tug Ala Asp Asp Ph “50 55 68
Abstract
Description
Claims
Priority Applications (19)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202080016346.4A CN114144432A (zh) | 2018-12-25 | 2020-02-20 | 针对人TRBV9的β链区域的单克隆抗体 |
PE2021001081A PE20220217A1 (es) | 2018-12-25 | 2020-02-20 | Anticuerpos humanizados contra la region de la cadena beta de la 9na familia trbv9 del tcr humano, y sus metodos de uso |
US17/417,686 US20220112286A1 (en) | 2018-12-25 | 2020-02-20 | Monoclonal antibodies against the beta chain region of human trbv9 |
JP2021537707A JP2022532274A (ja) | 2018-12-25 | 2020-02-20 | ヒトtrbv9のベータ鎖領域に対するモノクローナル抗体 |
JOP/2021/0169A JOP20210169A1 (ar) | 2018-12-25 | 2020-02-20 | أجسام مضادة أحادية النسيلة ضد منطقة سلسلة بيتا من trbv9 بشري |
CA3124813A CA3124813A1 (en) | 2018-12-25 | 2020-02-20 | Monoclonal antibodies against the beta chain region of human trbv9 |
SG11202106975VA SG11202106975VA (en) | 2018-12-25 | 2020-02-20 | Monoclonal antibodies against the beta chain region of human trbv9 |
AU2020204492A AU2020204492A1 (en) | 2018-12-25 | 2020-02-20 | Monoclonal antibodies against the beta chain region of human TRBV9 |
MA53689A MA53689B1 (fr) | 2018-12-25 | 2020-02-20 | Anticorps humanisés contre un fragment bêta d'une chaîne de la famille 9 du récepteur cellulaire trbv-9 de l'humain et méthodes de leur application |
EP20734640.4A EP3907239A4 (en) | 2018-12-25 | 2020-02-20 | MONOCLONAL ANTIBODIES AGAINST THE BETA CHAIN REGION OF HUMAN TRBV9 |
MX2021007719A MX2021007719A (es) | 2018-12-25 | 2020-02-20 | Anticuerpos humanizados contra la region de la cadena beta de la 9na familia trbv9 del tcr humano, y sus metodos de uso. |
CR20210354A CR20210354A (es) | 2018-12-25 | 2020-02-20 | Anticuerpos humanizados contra la región de la cadena beta de la 9na familia trbv9 del tcr humano, y sus métodos de uso |
KR1020217023568A KR20220131489A (ko) | 2018-12-25 | 2020-02-20 | 인간 trbv9의 베타 쇄 영역에 대한 단일클론 항체 |
BR112021012555-8A BR112021012555A2 (pt) | 2018-12-25 | 2020-02-20 | Anticorpos monoclonais contra a região de cadeia beta do trbv9 humano |
EA202191813A EA202191813A1 (ru) | 2018-12-25 | 2020-02-20 | Моноклональные антитела против участка бета-цепи trbv9 человека |
CONC2021/0008218A CO2021008218A2 (es) | 2018-12-25 | 2021-06-23 | Anticuerpos humanizados contra la región de la cadena beta de la 9na familia trbv9 del tcr humano, y sus métodos de uso |
ZA2021/04357A ZA202104357B (en) | 2018-12-25 | 2021-06-24 | Monoclonal antibodies against the beta chain region of human trbv9 |
IL284370A IL284370A (en) | 2018-12-25 | 2021-06-24 | Monoclonal antibodies against the beta chain region of human TRBV9 |
PH12021551532A PH12021551532A1 (en) | 2018-12-25 | 2021-06-25 | Monoclonal antibodies against the beta chain region of human trbv9 |
Applications Claiming Priority (2)
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RU2018146031A RU2712251C1 (ru) | 2018-12-25 | 2018-12-25 | Гуманизированные антитела против участка бета цепи 9-го семейства TRBV9 TKP человека, и способы их применения |
RU2018146031 | 2018-12-25 |
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WO2020139175A2 true WO2020139175A2 (ru) | 2020-07-02 |
WO2020139175A3 WO2020139175A3 (ru) | 2020-10-29 |
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PCT/RU2019/050258 WO2020091635A2 (ru) | 2018-12-25 | 2019-12-24 | Гуманизированные антитела против участка бета цепи 9-го семейства trbv9 ткр человека, и способы их применения |
PCT/RU2020/050024 WO2020139175A2 (ru) | 2018-12-25 | 2020-02-20 | Гуманизированные антитела против участка бета цепи 9-го семейства trbv9 ткр человека, и способы их применения |
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US (1) | US20220112286A1 (ru) |
EP (1) | EP3907239A4 (ru) |
JP (1) | JP2022532274A (ru) |
KR (2) | KR20210119404A (ru) |
CN (2) | CN113646333A (ru) |
AR (1) | AR117734A1 (ru) |
AU (1) | AU2020204492A1 (ru) |
BR (1) | BR112021012555A2 (ru) |
CA (2) | CA3127767A1 (ru) |
CL (1) | CL2021001705A1 (ru) |
CO (2) | CO2021008218A2 (ru) |
CR (1) | CR20210354A (ru) |
EA (1) | EA202191813A1 (ru) |
EC (1) | ECSP21046333A (ru) |
IL (1) | IL284370A (ru) |
JO (1) | JOP20210169A1 (ru) |
MA (1) | MA53689B1 (ru) |
MX (1) | MX2021007719A (ru) |
PE (1) | PE20220217A1 (ru) |
PH (1) | PH12021551532A1 (ru) |
RU (1) | RU2712251C1 (ru) |
SG (1) | SG11202106975VA (ru) |
TW (1) | TW202039574A (ru) |
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Cited By (1)
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US11845797B2 (en) | 2018-07-03 | 2023-12-19 | Marengo Therapeutics, Inc. | Anti-TCR antibody molecules and uses thereof |
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CN116510006A (zh) * | 2022-01-31 | 2023-08-01 | 拜奥卡德联合股份公司 | 抗trbv9抗体的药物组合物及其用途 |
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RU2017145662A (ru) | 2017-12-25 | 2019-06-25 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский национальный исследовательский медицинский университет им. Н.И. Пирогова" Министерства здравоохранения Российской Федерации (ФГБОУ ВО РНИМУ им. Н.И. Пирогова Минздрава России) | Моноклональные антитела и способы их применения |
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CA2765949C (en) * | 2009-06-25 | 2016-03-29 | Fred Hutchinson Cancer Research Center | Method of measuring adaptive immunity |
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US11845797B2 (en) | 2018-07-03 | 2023-12-19 | Marengo Therapeutics, Inc. | Anti-TCR antibody molecules and uses thereof |
US11965025B2 (en) | 2018-07-03 | 2024-04-23 | Marengo Therapeutics, Inc. | Method of treating solid cancers with bispecific interleukin-anti-TCRß molecules |
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