WO2021006619A1 - B7-h3에 특이적으로 결합하는 항체 및 그의 용도 - Google Patents
B7-h3에 특이적으로 결합하는 항체 및 그의 용도 Download PDFInfo
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- C07K16/2803—Immunoglobulins [IG], 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 [IG], 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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- G01N33/6893—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids related to diseases not provided for elsewhere
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Definitions
- the present invention relates to an anti-B7-H3 antibody that specifically binds to B7-H3 and its use, and more particularly, to an anti-B7-H3 antibody or antigen-binding fragment thereof, a nucleic acid encoding the same, and the nucleic acid.
- T lymphocytes are the major cells that can remove tumor cells (Effector cells).
- Immune checkpoints are co-signaling molecules that play a pivotal role in T lymphocyte activity and regulate to inhibit or stimulate TCR (T cell receptor) signals (Immunological reviews 2017, 276:52- 65).
- tumor cells express the ligand protein of the immune checkpoint molecule responsible for inhibition on the cell surface, thereby inhibiting the function of T lymphocytes and preventing changes in the tumor micro-environment. Resulting in suppressing immunity.
- CTLA-4 cytotoxic T lymphocyte antigen-4
- PD-1 programmed death-1
- the corresponding antigen presenting cells and tumor cell ligands are the B7 family. It is a monoclonal antibody inhibitor (blockade) for the molecules B7.1 (CD80) and B7.2 (CD86) and B7-H1/PD-L1 (programmed death-ligand-1) (N Engl J Med. 2011, 364(26): 2517-2526; N Engl J Med., 2012, 366(26)2455-2465; and N Engl J Med. 2013, 369(2): 134-144).
- B7-H3 (B7 Homologue 3, or CD276 (Cluster of Differentiation 276) is a member of the B7 family, B7.1 (CD80), B7.2 (CD86), B7-H1 (PD-L1), B7-DC (PD -L2), B7-H2 (ICOSL), B7-H4 (B7S1, B7x, Vtcn1), B7-H5 (VISTA, GI24, Dies1, PD-1H), B7-H6 (NCR3LG1) and B7-H7 (HHLA2) And 20-30% structural homology (Blood 2013, 121(5): 734-744; and Molecular Cancer Therapeutics 2017, 16(7): 1203-1211), and systematically preserved with various biological functions.
- B7-H3 mRNA is found in various normal tissues, the protein is rarely expressed.
- protein expression is induced in monocytes, macrophages, or dendritic cells, but is overexpressed in various solid carcinomas, prostate cancer, ovarian cancer, Breast cancer, colon cancer, renal cancer, non-small cell lung cancer, pancreatic cancer, head and neck cancer, melanoma, Expression was observed in glioblastoma (glioblastoma), neuroblastoma, and other tumors (eg, small round blue cell tumors of childhood).
- 4Ig-B7-H3 (IgV-IgC-IgV-IgC) is the main form, 2Ig-B7-H3 is slightly found, and in Murine it is the 2Ig-B7-H3 form.
- both types show similar functions (Genome Biol. 2005, 6:233.1-233.7; PNAS 2008, 105(30):10277-10278).
- 4Ig-B7-H3 can inhibit the anti-tumor activity of natural killer cells (PNAS 2004, 101(34): 12640-12645).
- the B7-H3 inhibitory signal is presumed to be achieved through interaction with molecules (NF-kB, AP-1, NFAT, etc.) involved in TCR signaling, and in animal experiments, Th1 (helper T cell), Th2 or Th17 was observed to inhibit (J. Immunol. 2004, 173:2500-2506; Immunol. Rev. 2009, 229(1):145-151).
- molecules NF-kB, AP-1, NFAT, etc.
- B7-H3 protein expression is very limited in normal cells, but it is significantly increased in the tumor vasculature as well as in primary and metastatic tumors, differentiated tumor cells, and tumor initiating. Or it is found in a number of cell types, including cancer stem cells (Medicographia 2014, 36(2): 285-292; and Cancer cell 2017, 31:501-515), and its expression is in some tumor types. There is a strong correlation with a poor prognosis.
- the present inventors have an anti-B7-H3 antibody that specifically binds to human B7-H3 as well as non-human (e.g., cynomolgus monkey, mouse, rat, etc.) B7-H3 with affinity. It was developed, and it was confirmed that this antibody can serve as a target immuno-cancer agent or a therapeutic agent for autoimmune or inflammatory diseases by binding to the cell surface B7-H3 and then entering the cells, and the present invention was completed.
- non-human e.g., cynomolgus monkey, mouse, rat, etc.
- An object of the present invention is to provide an anti-B7-H3 antibody or antigen-binding fragment thereof that specifically binds to B7-H3.
- Another object of the present invention is to provide a nucleic acid encoding the antibody or antigen-binding fragment thereof and a vector comprising the same.
- Another object of the present invention is to provide a cell transformed with the vector and a method for producing the antibody or antigen-binding fragment thereof using the same.
- Another object of the present invention is to provide a pharmaceutical composition for preventing or treating cancer or tumor, autoimmune disease or inflammatory disease comprising the antibody or antigen-binding fragment thereof, and a method of treating the disease using the same.
- Another object of the present invention is to provide an antibody-drug conjugate or multispecific antibody comprising the antibody or antigen-binding fragment thereof.
- Another object of the present invention is a pharmaceutical composition for the prevention or treatment of cancer or tumor, autoimmune disease or inflammatory disease comprising the antibody or antigen-binding fragment thereof, the antibody-drug conjugate or multispecific antibody, and the disease using the same Is to provide a method of treatment.
- Another object of the present invention is to provide a composition for diagnosis of cancer or tumor, autoimmune disease or inflammatory disease including the antibody or antigen-binding fragment thereof, the antibody-drug conjugate or multispecific antibody, and a method for diagnosing the disease using the same. To provide.
- the present invention is a heavy chain CDR1 selected from the group consisting of SEQ ID NOs: 1, 7, 13 and 19, a heavy chain CDR2 selected from the group consisting of SEQ ID NOs: 2, 8, 14 and 20, SEQ ID NO: 3, Heavy chain CDR3 selected from the group consisting of 9, 15 and 21, light chain CDR1 selected from the group consisting of SEQ ID NOs: 4, 10, 16, 22, 24, 26, 28, 30, 33 and 35, SEQ ID NOs: 5, 11, Anti-B7-H3 comprising a light chain CDR2 selected from the group consisting of 17 and 31, and a light chain CDR3 selected from the group consisting of SEQ ID NOs: 6, 12, 18, 23, 25, 27, 29, 32, 34 and 36 Antibodies or antigen-binding fragments thereof are provided.
- the present invention also provides a nucleic acid encoding the anti-B7-H3 antibody or antigen-binding fragment thereof, a recombinant expression vector comprising the nucleic acid, and a cell transformed with the recombinant expression vector.
- the present invention also comprises the steps of (i) culturing the transformed cells and (ii) recovering the anti-B7-H3 antibody or antigen-binding fragment thereof from the obtained cell culture medium, anti-B7-H3 antibody or It provides a method for producing an antigen-binding fragment thereof.
- the present invention also provides an antibody-drug conjugate (ADC) comprising the anti-B7-H3 antibody or antigen-binding fragment thereof and a drug.
- ADC antibody-drug conjugate
- the present invention also provides a multispecific antibody comprising the anti-B7-H3 antibody or antigen-binding fragment thereof.
- the present invention also contains the anti-B7-H3 antibody or antigen-binding fragment thereof, the antibody-drug conjugate or the multispecific antibody and a pharmaceutically acceptable additive as an active ingredient, cancer or tumor, autoimmune disease or inflammatory It provides a pharmaceutical composition for preventing or treating a disease, and a method of treating the disease using the same.
- the present invention also provides a composition for diagnosis of cancer or tumor, autoimmune disease or inflammatory disease comprising the anti-B7-H3 antibody or antigen-binding fragment thereof, the antibody-drug conjugate, or the multispecific antibody, and the disease using the same Provides a diagnostic method.
- FIG. 1 is a schematic diagram of a B7-H3 expression vector.
- Figures 6a to 6d are the results of measuring the binding force of the selected B7-H3 antibody to the cell surface B7-H3 by FACs
- Figure 6a is the result of measuring the binding force of each cell line of the CD276-033E03 antibody
- 6b is the cell line of the CD276-051H04 antibody
- 6c represents the result of measuring the binding force of each cell line of the CD276-039C05 and CD276-040F10 antibodies
- 6d represents the measurement result of each cell line of the six antibodies.
- 7A to 7E are ELISA results of measuring the binding ability of the selected B7-H3 antibodies to various B7-H3 antigens.
- FIG. 9A and 9B are results of measuring the intracellular influx of the complex of the selected B7-H3 antibody and the cell surface B7-H3 antigen
- FIG. 9A is the result of confirming the intracellular influx of the selected B7-H3 antibody over time.
- Figure 9b is a result of measuring the degree of intracellular influx of the antibody at 18 hours.
- the B7-H3 protein acting as an antigen of the anti-B7-H3 antibody or antigen-binding fragment thereof according to the present invention is closely related to inhibition of the activity of immune cells, and is a membrane protein present on the surface of immune cells. Acts as a co-inhibitory receptor.
- the B7-H3 may be derived from mammals such as humans, primates such as monkeys, and rodents such as mice and rats.
- B7-H3 is a concept collectively referring to any variant, isotype and species homologue of B7-H3, which is naturally expressed by cells.
- B7-H3 of human, but is not limited thereto, and may be a concept including B7-H3 of other mammalian animals.
- the anti-B7-H3 antibody or antigen-binding fragment thereof specifically binds to the amino acid sequence of the human B7-H3 protein represented by SEQ ID NO: 65 or a part thereof, but is not limited thereto. .
- antibody refers to an anti-B7-H3 antibody that specifically binds to B7-H3.
- the scope of the present invention includes not only complete antibody forms that specifically bind to B7-H3, but also antigen-binding fragments of the antibody molecules.
- a complete antibody is a structure having two full-length light chains and two full-length heavy chains, and each light chain is linked to a heavy chain by a disulfide bond.
- the heavy chain constant region has gamma ( ⁇ ), mu ( ⁇ ), alpha ( ⁇ ), delta ( ⁇ ), and epsilon ( ⁇ ) types, and subclasses gamma 1 ( ⁇ 1), gamma 2 ( ⁇ 2), and gamma 3 ( ⁇ 3), gamma4 ( ⁇ 4), alpha1 ( ⁇ 1) and alpha2 ( ⁇ 2).
- the constant region of the light chain has kappa ( ⁇ ) and lambda ( ⁇ ) types.
- Antigen-binding fragment or “antibody fragment” of an antibody refers to a fragment having an antigen-binding function, and may be in the form of Fab, F(ab'), F(ab')2, and Fv.
- Fab is a structure having a light chain and a heavy chain variable region, a light chain constant region, and a heavy chain first constant region (CH1), and has one antigen-binding site.
- Fab' differs from Fab in that it has a hinge region containing at least one cysteine residue at the C-terminus of the heavy chain CH1 domain.
- F(ab')2 antibodies are generated when cysteine residues in the hinge regions of two Fab's form disulfide bonds.
- Fv refers to the smallest fragment of an antibody having only a heavy chain variable region and a light chain variable region.
- the double-chain Fv (two-chain Fv) is a non-covalent bond between the heavy chain variable region and the light chain variable region
- single-chain Fv (scFv) is generally a variable region of the heavy chain and the variable region of the light chain through a peptide linker. Since the regions are linked by covalent bonds or directly linked at the C-terminus, a dimer-like structure such as double-chain Fv can be achieved.
- antibody fragments can be obtained using proteolytic enzymes (e.g., restriction digestion of the entire antibody with papain yields Fab, and digestion with pepsin yields F(ab')2 fragments), and gene It can also be produced through recombinant technology.
- the antibody according to the invention is in the Fv form (eg scFv) or in the complete antibody form.
- the heavy chain constant region may be any one isotype of gamma ( ⁇ ), mu ( ⁇ ), alpha ( ⁇ ), delta ( ⁇ ), or epsilon ( ⁇ ).
- the constant region is gamma 1 (IgG1), gamma 3 (IgG3), or gamma 4 (IgG4).
- the light chain constant region may be of kappa or lambda type.
- Antibodies of the present invention include monoclonal antibodies, multispecific antibodies, human antibodies, humanized antibodies, chimeric antibodies, single chain Fvs (scFV), single chain antibodies, Fab fragments, F(ab') fragments, disulfide-binding Fvs (sdFV) And an anti-idiotype (anti-Id) antibody, or an epitope-binding fragment of the antibodies, but is not limited thereto.
- the antibody of the present invention may be a human antibody sequence in which all amino acid sequences constituting the antibody are composed of human immunoglobulin sequences, and if necessary, humanized antibodies or chimeric antibodies according to methods well known in the art. It can be modified in various forms such as antibodies.
- Antibody variable domain refers to the light and heavy chain portions of an antibody molecule comprising the amino acid sequence of the Complementarity Determining Region (CDR), and the Framework Region (FR).
- CDR Complementarity Determining Region
- FR Framework Region
- VH refers to the variable domain of the heavy chain.
- VL refers to the variable domain of the light chain.
- CDR complementarity determining region
- the present invention consists of a heavy chain CDR1 selected from the group consisting of SEQ ID NOs: 1, 7, 13 and 19, a heavy chain CDR2 selected from the group consisting of SEQ ID NOs: 2, 8, 14 and 20, and SEQ ID NOs: 3, 9, 15 and 21
- a heavy chain CDR3 selected from the group, SEQ ID NOs: 4, 10, 16, 22, 24, 26, 28, 30, 33 and 35
- light chain CDR1 selected from the group consisting of, SEQ ID NOs: 5, 11, 17 and 31
- Anti-B7-H3 antibody or antigen-binding fragment thereof comprising a selected light chain CDR2 and a light chain CDR3 selected from the group consisting of SEQ ID NOs: 6, 12, 18, 23, 25, 27, 29, 32, 34 and 36 to provide.
- Heavy chain CDR1 of SEQ ID NO: 1 heavy chain CDR2 of SEQ ID NO: 2, heavy chain CDR3 of SEQ ID NO: 3, light chain CDR1 of SEQ ID NO: 4, light chain CDR2 of SEQ ID NO: 5, and light chain CDR3 of SEQ ID NO: 6;
- Heavy chain CDR1 of SEQ ID NO: 7 heavy chain CDR2 of SEQ ID NO: 8
- heavy chain CDR3 of SEQ ID NO: 9 light chain CDR1 of SEQ ID NO: 10
- light chain CDR2 of SEQ ID NO: 11 light chain CDR3 of SEQ ID NO: 12;
- Heavy chain CDR1 of SEQ ID NO: 13 heavy chain CDR2 of SEQ ID NO: 14
- heavy chain CDR3 of SEQ ID NO: 15 light chain CDR1 of SEQ ID NO: 16, light chain CDR2 of SEQ ID NO: 17, and light chain CDR3 of SEQ ID NO: 18;
- Heavy chain CDR1 of SEQ ID NO: 19 heavy chain CDR2 of SEQ ID NO: 20
- heavy chain CDR3 of SEQ ID NO: 21 light chain CDR1 of SEQ ID NO: 22, light chain CDR2 of SEQ ID NO: 11, and light chain CDR3 of SEQ ID NO: 23;
- Heavy chain CDR1 of SEQ ID NO: 19 heavy chain CDR2 of SEQ ID NO: 20
- heavy chain CDR3 of SEQ ID NO: 21 light chain CDR1 of SEQ ID NO: 24, light chain CDR2 of SEQ ID NO: 11, and light chain CDR3 of SEQ ID NO: 25;
- Heavy chain CDR1 of SEQ ID NO: 19 heavy chain CDR2 of SEQ ID NO: 20
- heavy chain CDR3 of SEQ ID NO: 21 light chain CDR1 of SEQ ID NO: 26
- light chain CDR2 of SEQ ID NO: 11 light chain CDR3 of SEQ ID NO: 27;
- Heavy chain CDR1 of SEQ ID NO: 19 heavy chain CDR2 of SEQ ID NO: 20
- heavy chain CDR3 of SEQ ID NO: 21 light chain CDR1 of SEQ ID NO: 28, light chain CDR2 of SEQ ID NO: 5, and light chain CDR3 of SEQ ID NO: 29;
- Heavy chain CDR1 of SEQ ID NO: 19 heavy chain CDR2 of SEQ ID NO: 20
- heavy chain CDR3 of SEQ ID NO: 21 light chain CDR1 of SEQ ID NO: 30, light chain CDR2 of SEQ ID NO: 31, and light chain CDR3 of SEQ ID NO: 32;
- Heavy chain CDR1 of SEQ ID NO: 19 heavy chain CDR2 of SEQ ID NO: 20
- heavy chain CDR3 of SEQ ID NO: 21 light chain CDR1 of SEQ ID NO: 33, light chain CDR2 of SEQ ID NO: 11, and light chain CDR3 of SEQ ID NO: 34; or
- Heavy chain CDR1 of SEQ ID NO: 19 heavy chain CDR2 of SEQ ID NO: 20
- heavy chain CDR3 of SEQ ID NO: 21 light chain CDR1 of SEQ ID NO: 35, light chain CDR2 of SEQ ID NO: 11, and light chain CDR3 of SEQ ID NO: 36.
- the anti-B7-H3 antibody or antigen-binding fragment thereof of the present invention comprises the heavy chain variable region of SEQ ID NO: 37, 39, 41 or 43, or SEQ ID NO: 38, 40, 42, 44, 45, 46, 47, 48, 49 or 50 light chain variable regions may be included.
- FR “Skeletal regions” are variable domain residues other than CDR residues. Each variable domain typically has 4 FRs identified as FR1, FR2, FR3 and FR4.
- the antibody is monovalent or bivalent, and includes single or double chains.
- the binding affinity (K D ) of the antibody is in the range of 10 -8 M to 10 -12 M.
- the binding affinity of the antibody is 10 -8 M to 10 -12 M, 10 -9 M to 10 -12 M, 10 -10 M to 10 -12 M, 10 -8 M to 10 -11 M , 10 -9 M to 10 -11 M, 10 -10 M to 10 -11 M, 10 -8 M to 10 -10 M, 10 -9 M to 10 -10 M, or 10 -8 M to 10 -9 It is M.
- “Phage display” is a technique for displaying a variant polypeptide as a fusion protein with at least a portion of an envelope protein on the surface of a phage, eg, fibrous phage particle.
- the usefulness of phage display lies in the fact that it can quickly and efficiently classify sequences that bind to a target antigen with high affinity, targeting a large library of randomized protein variants. Displaying peptide and protein libraries on phage has been used to screen millions of polypeptides to identify polypeptides with specific binding properties.
- Phage display technology has the advantage of being able to generate large antibody libraries with various sequences in a short time compared to conventional hybridoma and recombinant methods for producing antibodies with desired characteristics.
- phage antibody libraries can generate antibodies even against toxic or low antigenic antigens.
- Phage antibody libraries can also be used to generate and identify novel therapeutic antibodies.
- a technique capable of identifying and isolating high affinity antibodies from phage display libraries is important for the separation of novel antibodies for treatment. Isolation of high affinity antibodies from a library can depend on the size of the library, the efficiency of production among bacterial cells and the diversity of the library.
- an antibody or antigen-binding fragment thereof in which a part of the amino acid sequence is substituted through conservative substitution in the anti-B7-H3 antibody or antigen-binding fragment thereof according to the present invention is also included. Included.
- “conservative substitution” refers to a modification of a polypeptide comprising the substitution of one or more amino acids with amino acids having similar biochemical properties that do not cause loss of biological or biochemical function of the polypeptide.
- “Conservative amino acid substitutions” are substitutions that replace amino acid residues with amino acid residues having similar side chains. Classes of amino acid residues with similar side chains are defined in the art and are well known. These classes are amino acids with basic side chains (e.g. lysine, arginine, histidine), amino acids with acidic side chains (e.g. aspartic acid, glutamic acid), amino acids with uncharged polar side chains (e.g.
- glycine Asparagine, glutamine, serine, threonine, tyrosine, cysteine
- amino acids with non-polar side chains e.g., alanine, valine, leucine, isoleucine, proline, phenylalanine, methionine, tryptophan
- beta-branched side chains Amino acids (eg threonine, valine, isoleucine) and amino acids having aromatic side chains (eg tyrosine, phenylalanine, tryptophan, histidine).
- Antibodies of the present invention may still retain activity even with conservative amino acid substitutions as described above.
- the present invention also provides a nucleic acid encoding an anti-B7-H3 antibody or antigen-binding fragment thereof according to the present invention.
- the nucleic acid used herein may exist in cells, cell lysates, or may exist in a partially purified or substantially pure form. Nucleic acids are prepared by standard techniques including alkali/SDS treatment, CsCl banding, column chromatography, agarose gel electrophoresis, and others well known in the art to obtain other cellular components or other contaminants, e.g. When purified from a nucleic acid or protein from another cell, it is “isolated” or “substantially pure”.
- the nucleic acid of the present invention may be, for example, DNA or RNA, and may or may not contain an intron sequence.
- a nucleotide which is a basic structural unit in a nucleic acid, includes not only natural nucleotides, but also analogs with modified sugar or base moieties.
- the sequence of the nucleic acid encoding the heavy and light chain variable regions of the present invention can be modified. Such modifications include additions, deletions, or non-conservative or conservative substitutions of nucleotides.
- the nucleic acid encoding the anti-B7-H3 antibody is the polynucleotide of SEQ ID NOs: 51, 53, 55, and 57 encoding the heavy chain variable region, and SEQ ID NOs: 52, 54 encoding the light chain variable region, It may include any one or more sequences selected from the group consisting of 56, and 58 to 64 polynucleotides.
- the antibody of the present invention or a nucleic acid molecule encoding the same is interpreted to include a sequence exhibiting substantial identity with the sequence described in SEQ ID NO:
- the above substantial identity is 90% or more homology when the sequence of the present invention and any other sequence are arranged to correspond as much as possible and the aligned sequence is analyzed using an algorithm commonly used in the art, Preferably, it means a sequence exhibiting 95% or more homology, more preferably 96% or more, 97% or more, 98% or more, or 99% or more homology.
- sequence homology of the nucleic acid or protein of the present invention may be determined using a sequence comparison algorithm (eg, NCBI Basic Local Alignment Search Tool; BLAST), manual alignment, and visual inspection.
- sequence comparison algorithm eg, NCBI Basic Local Alignment Search Tool; BLAST
- the present invention relates to a recombinant expression vector comprising the nucleic acid.
- DNA encoding the partial or full-length light and heavy chains is used in standard molecular biology techniques (e.g., PCR amplification or high CDNA cloning using bridoma), and DNA can be "operably linked" to transcription and translation control sequences and inserted into expression vectors.
- Vector components generally include, but are not limited to, one or more of the following: signal sequence, origin of replication, one or more marker genes, enhancer elements, promoters, and transcription termination sequences.
- vector refers to a plasmid vector as a means for expressing a gene of interest in a host cell; Cozmid vector; Viral vectors such as bacteriophage vectors, adenovirus vectors, retroviral vectors and adeno-associated viral vectors, and the like.
- the nucleic acid encoding the antibody or antigen-binding fragment thereof is operably linked to a promoter.
- operably linked refers to the ligation of a gene encoding an antibody or antigen-binding fragment thereof into a vector such that the transcriptional and translational control sequences in the vector have the intended function of regulating the transcription and translation of the antibody gene. It means to be.
- the expression vector and expression control sequence are selected so as to be compatible with the cell for expression used.
- the light and heavy chain genes of the antibody are inserted into separate vectors, or both genes are inserted into the same expression vector.
- Antibody genes are inserted into the expression vector by standard methods (e.g., ligation of complementary restriction enzyme sites on antibody gene fragments and vectors, or blunt end ligation if no restriction enzyme sites are present).
- the recombinant expression vector may contain a sequence encoding a signal peptide that facilitates secretion of the antibody chain from the transformed cell.
- the antibody chain gene and signal peptide-encoding sequence can be cloned into a vector in frame so that the signal peptide is bound to the amino terminus of the antibody chain and expressed.
- the signal peptide may be an immunoglobulin signal peptide or a heterologous signal peptide (ie, a signal peptide derived from a protein other than an immunoglobulin).
- the recombinant expression vector may include a regulatory sequence that controls the expression of the antibody chain gene in the transformed cell.
- the “regulatory sequence” may include promoters, enhancers and other expression control elements (eg, polyadenylation signals) that control the transcription or translation of antibody chain genes.
- promoters e.g., promoters, enhancers and other expression control elements (eg, polyadenylation signals) that control the transcription or translation of antibody chain genes.
- expression control elements eg, polyadenylation signals
- the design of the expression vector may vary by selecting different regulatory sequences according to factors such as selection of cells to be transformed and expression levels of proteins.
- the vector of the invention may also contain other sequences to be fused to the antibody gene to facilitate purification of the antibody expressed from the vector.
- This sequence may be, for example, a gene such as glutathione S-transferase (Pharmacia, USA), maltose binding protein (NEB, USA), FLAG (IBI, USA), 6x His (hexahistidine; Quiagen, USA).
- the vector includes an antibiotic resistance gene commonly used in the art as a selection marker, and such genes include, for example, ampicillin, gentamicin, carbenicillin, chloramphenicol, streptomycin, kanamycin, geneticin, neomycin, and There are genes for resistance to tetracycline.
- the present invention also provides a cell transformed with the recombinant expression vector.
- Cells according to the present invention may be animal cells, plant cells, yeast, E. coli, insect cells, etc., but are not limited thereto.
- the cells according to the present invention are E. coli, Bacillus subtilis, Streptomyces sp., Pseudomonas sp., Proteus mirabilis. ) Or it may be a prokaryotic cell such as Staphylococcus sp.
- fungi such as Aspergillus sp., Pichia pastoris, Saccharomyces cerevisiae, Schizosaccharomyces sp., and Neuro. It may be a lower eukaryotic cell such as Neurospora crassa, and a eukaryotic cell such as cells of higher eukaryotes (eg, insects).
- the cells according to the present invention may be derived from plants or mammals.
- COS-7 monkey kidney cells 7
- BHK baby hamster kidney
- CHO Choinese hamster ovary
- CHOK1, DXB-11, DG-44 CHO/-DHFR
- CV1, HEK293, BHK, TM4 VERO, HELA
- MDCK BRL 3A
- W138 Hep G2
- SK-Hep MMT
- TRI MRC 5, FS4, 3T3, RIN
- HT1080 or the like may be used, but is not limited thereto.
- COS7 cells Preferably, COS7 cells, NSO cells, SP2/0 cells, CHO cells, W138, BHK cells, MDCK, myeloma cell lines, HuT 78 cells and HEK293 cells, particularly preferably CHO cells can be used.
- expression vectors suitable for eukaryotic cells include expression vectors derived from SV40, bovine papillomavirus, anenovirus, adeno-associated virus, cytomegalovirus, and retrovirus, but are limited to these. It does not become.
- Expression vectors that can be used in bacterial cells include E.
- coli-derived bacterial plasmids such as pET, pRSET, pBluescript, pGEX2T, pUC, col E1, pCR1, pBR322, pMB9 and derivatives thereof; Plasmids with a wider host range, such as RP4; phage DNA such as ⁇ gt10, ⁇ gt11, and various phage lambda derivatives such as NM989; And other DNA phages such as M13 and filamentous single-stranded DNA phage.
- Expression vectors useful for yeast cells are the YEp plasmid and derivatives thereof.
- a vector useful for insect cells is pVL941.
- the vector is transfected or transfected into cells.
- the present invention also includes (i) culturing the transformed cells; And (ii) recovering the anti-B7-H3 antibody or antigen-binding fragment thereof from the obtained cell culture medium.
- a recombinant expression vector capable of expressing the anti-B7-H3 antibody or antigen-binding fragment thereof is introduced into a mammalian cell, a culture in which the cell is cultured for a period sufficient to allow the antibody to be expressed in the cell, or more preferably The antibody or antigen binding fragment thereof can be prepared by culturing the cells for a period sufficient to allow the antibody to be secreted into the medium.
- the cells may be cultured in various media, and commercial media may be used without limitation as the culture media. All other essential supplements known to those skilled in the art may also be included in suitable concentrations. Suitable culture conditions, such as temperature, pH, etc., have already been used for protein expression in the selected host cells, which will be apparent to those skilled in the art.
- the expressed antibody can be separated from the cell culture and purified uniformly. Isolation or purification of the antibody may be performed by a conventional protein separation and purification method, such as chromatography.
- the chromatography may include, for example, affinity chromatography, ion exchange chromatography, hydrophobic chromatography, or hydroxylapatite chromatography using a protein A column or a protein G column.
- antibodies can be separated and purified by further combining filtration, ultrafiltration, salting out, dialysis, and the like.
- the present invention also provides an antibody-drug conjugate comprising the antibody or antigen-binding fragment thereof and a drug.
- the antibody-drug conjugate requires that the anticancer drug is stably bound to the antibody before the anticancer drug is delivered to the target cancer cell.
- the drug delivered to the target must be released from the antibody to induce the death of the target cell. For this, when the drug stably binds to the antibody and is released from the target cell, it must have sufficient cytotoxicity to induce the death of the target cell.
- the drug may be bound to the antibody or antigen-binding fragment thereof of the present invention as an agent exhibiting a pharmacological effect, and may be separated from the antibody or antigen-binding fragment thereof by acidic conditions, and exhibit a therapeutic effect on target cells.
- the drug may be a cytotoxin, a radioactive isotope, an antiproliferative agent, a pro-apoptotic agent, a chemotherapeutic agent, and a therapeutic nucleic acid, but is not limited thereto.
- the antibody-drug conjugate can be internalized into cells and mediate antibody dependent cytotoxicity.
- cytotoxic activity refers to a cell-killing, cell proliferation inhibitory or growth inhibitory effect of an antibody-drug conjugate or an intracellular metabolite of the antibody-drug conjugate. Cytotoxic activity can be expressed as an IC5O value, which is the concentration (molar or mass) per unit volume at which 1/2 of the cells survive.
- cytotoxin generally refers to an agent that inhibits or prevents the function of cells and/or destroys cells.
- Representative cytotoxins include antibiotics, inhibitors of tubulin polymerization, alkylating agents that bind to and destroy DNA, and agents that disrupt the function or protein synthesis of essential cellular proteins such as protein kinases, phosphatases, topoisomerases, enzymes and cyclins. do.
- Examples of cytotoxins include taxol, cytochalasin B, gramicidin D, ethidium bromide, emetine, mitomycin, and etoposide.
- the antibodies of the invention may contain high energy radioactive isotopes.
- Such isotopes may be bound directly to the antibody, for example at cysteine residues present in the antibody, or chelates may be used to mediate the binding of the antibody to the radioactive isotope.
- Radioactive isotopes suitable for radiotherapy include, but are not limited to, ⁇ -emitters, ⁇ -emitters and auger electrons.
- Radioactive isotopes useful for diagnostic applications include positron emitters and ⁇ -emitters.
- Antiproliferative and apoptosis promoters include PPAR-gamma (e.g., cyclopentenone prostaglandin (cyPGs)), retinoids, triterpinoids (e.g., cycloartan, lupan, uric acid, oleanane, priedelane, Dammaran, cucurbitacin and limonoid triterpenoid), inhibitors of EGF receptors (e.g., HER4), rapamycin, CALCITRIOL(1,25-dihydroxycholecalciferol (vitamin D)), Aromatase inhibitors (FEMARA (retrozone)), telomerase inhibitors, iron chelating agents (e.g.
- PPAR-gamma e.g., cyclopentenone prostaglandin (cyPGs)
- retinoids e.g., cycloartan, lupan, uric acid, oleanane
- 3-aminopyridine-2-carboxaldehyde thiosemicarbazone (triapine)), apoptin (viral protein 3) -VP3) from chicken anemia virus, inhibitors of Bcl-2 and Bcl-X(L), TNF-alpha, FAS ligand, TNF-related apoptosis-inducing ligand (TRAIL/Apo2L), TNF-alpha/FAS ligand/TNF -Related apoptosis-inducing ligand (TRAIL/Apo2L) activators of signaling, and inhibitors of PI3K-Akt survival pathway signaling (eg, UCN-01 and geldanamycin).
- TRAIL/Apo2L TNF-alpha/FAS ligand/TNF -Related apoptosis-inducing ligand activators of signaling
- inhibitors of PI3K-Akt survival pathway signaling eg, UCN-01 and
- a “chemotherapeutic agent” is a chemical compound useful in the treatment of cancer, regardless of the mechanism of action.
- Classes of chemotherapeutic agents include, but are not limited to, alkylating agents, metabolic antagonists, spindle toxic plant alkaloids, cytotoxic/anti-tumor antibiotics, topoisomerase inhibitors, antibodies, photosensitizers, and kinase inhibitors.
- Chemotherapeutic agents include compounds used in "targeted therapy” and traditional chemotherapy.
- the conjugate can be prepared by a known method by combining a drug with an antibody or an antigen-binding fragment thereof.
- Antibodies and drugs can be directly bonded through their own linking group or indirectly through linkers or other substances.
- the main mechanisms by which drugs are cleaved from antibodies are hydrolysis of lysosomes (hydrazone, acetal and cis-aconitate-like amides) at acidic pH, peptide cleavage by lysosomal enzymes (cathepsin and other lysosomal enzymes) and disulfide. The reduction of is included.
- the mechanisms for linking the drug to the antibody are very diverse and any suitable linker can be used.
- Suitable linking groups for binding the antibody and drug are well known in the art, and include, for example, disulfide groups, thioether groups, acid degradable groups, photodegradable groups, peptidase degradable groups, and esterase degradable groups.
- the linking group may include, for example, a disulfide bond using an SH group or a bond via maleimide.
- the intramolecular disulfide bond of the antibody Fc region and the disulfide bond of the drug are reduced, and both are linked by a disulfide bond.
- Antibodies and drugs can also be indirectly bound through other substances (linkers). It is preferable that the linker has one or two or more functional groups that react with antibodies, drugs, or both. Examples of the functional group include an amino group, a carboxyl group, a mercapto group, a maleimide group, and a pyridinyl group.
- the present invention also provides a multispecific antibody comprising the antibody or antigen-binding fragment thereof.
- Multispecific antibody refers to an antibody capable of binding to two or more different kinds of antigens (target proteins), and is a form produced by genetic engineering or any method.
- Multi-specific antibodies include bi-specific antibodies, tri-specific antibodies or tetra-specific antibodies.
- the multispecific antibody is preferably in a form in which the anti-B7-H3 antibody according to the present invention is bound to an antibody or fragment thereof having the ability to bind to an immunogenic cell-specific target molecule.
- the immunogenic cell-specific target molecule is preferably selected from TCR/CD3, CD16 (Fc ⁇ RIIIa) CD44, CD56, CD69, CD64 (Fc ⁇ RI), CD89 and CD11b/CD18 (CR3), but is not limited thereto.
- the multispecific antibody is preferably in a form in which the anti-B7-H3 antibody according to the present invention is bound to an antibody or fragment thereof having the ability to bind to cytokines that stimulate or inhibit immunity.
- the cytokine that stimulates or inhibits immunity is preferably selected from, for example, IL-2, IL-6, IL-7, IFN ⁇ , GM-CSF, IL-10, and TGF- ⁇ , but is not limited thereto. .
- Multispecific antibodies are targets for which the anti-B7-H3 antibody according to the present invention is used in cancer treatment, for example, PD-1, PD-L1, VEGF, EGFR, Her2/neu, VEGF receptor, and other growth factor receptors. , CD20, CD40, CTLA-4, TIGIT, TIM-3, LAG-3, OX-40, 4-IBB, and preferably in a form combined with an antibody or fragment thereof having binding ability to ICOS, but limited thereto no.
- Antibodies belonging to multispecific antibodies can be classified into scFv-based antibodies, Fab-based antibodies, and IgG-based antibodies.
- a bispecific antibody since it can suppress or amplify two signals at the same time, it can be more effective than the case of suppressing/amplifying one signal. Compared with the case of treating each signal with each signal inhibitor, Low-dose dosing is possible and can suppress/amplify two signals at the same time and space.
- bispecific antibodies are well known. Traditionally, recombinant production of bispecific antibodies is based on the co-expression of two immunoglobulin heavy/light chain pairs under conditions where the two heavy chains have different specificities.
- a hybrid scFv can be prepared in a heterodimer form by combining VL and VH of different scFvs with each other to make a diabody, and different scFvs can be mixed with each other.
- a tandem ScFv can be prepared by linking, and a heterodimeric miniantibody can be prepared by expressing the CH1 and CL of Fab at the ends of each scFv, and the homodimeric domain of Fc By substituting some amino acids of the CH3 domain into a heterodimeric structure in the form of a'knob into hole', the modified CH3 domains are expressed at different ends of each scFv to prepare a heterodimeric scFv type minibody can do.
- Fab' against a specific antigen can be combined with each other using a disulfide bond or a mediator to form a heterodimeric Fab, and the end of the heavy or light chain of a specific Fab
- scFvs for different antigens, it can be prepared to have two antigen-binding valencies or four antigen-binding valencies in a homodimeric form by placing a hinge region between the Fab and the scFv.
- a dual target bibody having three antigen-binding values by fusing scFvs for different antigens to the light and heavy chain ends of the Fab, a dual target bibody having three antigen-binding values, and by fusing different scFvs to the light and heavy chain ends of the Fab, respectively. It can be prepared in the form of a triple target bibody having three binding values for each, and can be obtained by chemically conjugating three different Fabs.
- an IgG-based bispecific antibody a method of producing a bispecific antibody by producing a hybrid hybridoma, aka quadromas, by re-crossing a mouse and rat hybridoma is known.
- a bispecific antibody can be prepared in the form of a so-called'Holes and Knob' produced in a heterodimer form by modifying some amino acids of the CH3 homodimeric domain of Fc for different heavy chains while sharing the light chain portion. have. It is also possible to prepare homodimeric forms of (scFv)4-IgG by fusion-expressing two different scFvs to a constant domain instead of the variable domains of the light and heavy chains of IgG.
- the present invention also includes the anti-B7-H3 antibody or antigen-binding fragment thereof, or the multispecific antibody or antibody-drug conjugate comprising the same as an active ingredient and a pharmaceutically acceptable additive, cancer or tumor, autoimmune It provides a pharmaceutical composition for preventing or treating diseases or inflammatory diseases.
- the cancer or tumor, autoimmune disease or inflammatory disease may be related to the expression or overexpression of B7-H3.
- cancer and “tumor” are used substantially the same meaning, and typically refer to or mean a physiological condition of a mammal characterized by uncontrolled cell growth and proliferation.
- Prevention refers to any action of inhibiting or delaying the progression of cancer or tumor, autoimmune disease or inflammatory disease by administration of the composition according to the present invention
- treatment refers to inhibiting the development of cancer or tumor, cancer or tumor It means alleviation or elimination of, suppression, alleviation or elimination of autoimmune diseases or inflammatory diseases.
- Cancer or carcinoma that can be treated with the composition of the present invention is not particularly limited, and includes both solid cancer and blood cancer.
- cancers include skin cancer such as melanoma, liver cancer, hepatocellular carcinoma, stomach cancer, breast cancer, lung cancer, ovarian cancer, bronchial cancer, nasopharyngeal cancer, laryngeal cancer, pancreatic cancer, bladder cancer, colon cancer, colon cancer, pancreatic cancer, uterus.
- Cervical cancer brain cancer, prostate cancer, non-small cell lung cancer, bone cancer, skin cancer, thyroid cancer, parathyroid cancer, kidney cancer, esophageal cancer, biliary tract cancer, testicular cancer, rectal cancer, head and neck cancer, cervical cancer, ureter cancer, osteosarcoma, neuroblastoma, fibrosarcoma, rhabdomyosarcoma Sarcoma, astrocytoma, glioblastoma (glioblastoma), neuroblastoma (neuroblastoma), glioma, and may be selected from the group consisting of other tumors (eg, small round blue cell tumors of childhood), but is not limited thereto.
- other tumors eg, small round blue cell tumors of childhood
- the cancer or tumor is characterized in that the B7-H3 protein is expressed, and prostate cancer, ovarian cancer, breast cancer, colon cancer, kidney cancer, non-small cell lung cancer, pancreatic cancer, head and neck cancer, melanoma, glioblastoma, nerve It may be characterized in that it is selected from the group consisting of blastoma and other tumors (eg, small round blue cell tumors of childhood).
- the cancer may be a primary cancer or a metastatic cancer.
- the autoimmune disease or inflammatory disease may be asthma, rheumatoid arthritis, or multiple sclerosis, but is not limited thereto.
- the pharmaceutical composition comprises a therapeutically effective amount of an anti-B7-H3 antibody or antigen-binding fragment thereof, together with a pharmaceutically acceptable additive.
- pharmaceutically acceptable additives are substances that can be added to the active ingredient to help formulate or stabilize the pharmaceutical composition and do not cause significant toxic effects to the patient.
- the additive refers to a carrier or diluent that does not irritate the patient and does not impair the biological activity and properties of the administered compound.
- Acceptable pharmaceutical carriers for compositions formulated as liquid solutions are sterilized and biocompatible, and include saline, sterile water, Ringer's solution, buffered saline, albumin injection solution, dextrose solution, maltodextrin solution, glycerol, ethanol, and A mixture of these may be used, and other conventional additives such as antioxidants, buffers, and bacteriostatic agents may be added as necessary.
- injectable formulations such as aqueous solutions, suspensions, emulsions, and the like, pills, capsules, granules, or tablets.
- compositions include sterile aqueous solutions or dispersions and sterile powders for preparing sterile injectable solutions or dispersions for immediate administration (extemporaneous).
- the composition is preferably formulated for parenteral injection.
- the composition may be formulated as a solution, microemulsion, liposome, or other customized formulation suitable for high drug concentration.
- the carrier can be, for example, a solvent or dispersion medium containing water, ethanol, polyol (eg glycerol, propylene glycol and liquid polyethylene glycol, etc.) and suitable mixtures thereof.
- isotonic agents such as sugars, polyalcohols such as mannitol, sorbitol or sodium chloride, may be included in the composition.
- Each formulation can be prepared using methods well known in the pharmaceutical field.
- the dosage of the pharmaceutical composition according to the present invention is not particularly limited, but may be changed according to various factors including the patient's health status and weight, the severity of the disease, the type of drug, the route of administration, and the administration time.
- the pharmaceutical compositions according to the present invention can be administered in a single or multiple doses per day into mammals, including humans, rats, mice, livestock, etc. through various routes, typically accepted oral or parenteral routes. Can be administered.
- the oral, rectal, topical, intravenous, intraperitoneal, intramuscular, intraarterial, transdermal, intranasal, inhalation, intraocular, intrapulmonary or intradermal routes may be administered in a conventional manner, but are limited thereto. no.
- the pharmaceutical composition according to the present invention can be administered to a patient as a bolus or by continuous infusion, if necessary.
- the bolus administration of the antigen-binding fragment of the anti-B7-H3 antibody of the present invention represented by the Fab fragment is 0.0025 to 100 mg/kg body weight, 0.025 to 0.25 mg/kg, 0.010 to 0.10 mg/kg or 0.10 To 0.50 mg/kg.
- the antigen-binding fragment of the anti-B7-H3 antibody of the present invention represented by the Fab fragment is 0.001 to 100 mg/kg body weight/min, 0.0125 to 1.25 mg/kg/min, 0.010 to 0.75 mg/kg/ Min, 0.010 to 1.0 mg/kg/min or 0.10 to 0.50 mg/kg/min for 1 hour to 24 hours, 1 hour to 12 hours, 2 hours to 12 hours, 6 hours to 12 hours, 2 hours to 8 hours, Or can be administered over a period of 1 to 2 hours.
- the dosage is about 1 to 10 mg/kg body weight, 2 to 8 mg/kg, 3 to 7 mg/kg, or 4 to 6 mg May be /kg.
- Full-length anti-B7-H3 antibodies are typically administered via infusion lasting a period of 30 to 35 minutes.
- the frequency of administration depends on the severity of the condition. The frequency can range from 3 times per week to once every 1 or 2 weeks.
- the present invention also provides a therapeutically effective amount of the anti-B7-H3 antibody or antigen-binding fragment thereof or the multispecific antibody or antibody-drug conjugate in need of prevention or treatment of cancer or tumor, autoimmune disease or inflammatory disease. It relates to a method of preventing or treating cancer or tumor, autoimmune disease or inflammatory disease, comprising administering to a patient.
- the prevention or treatment method may further include the step of identifying a patient in need of prevention or treatment of the disease prior to the administration step.
- the antibody or antigen-binding fragment thereof in combination with other conventional anticancer therapeutic agents, it is possible to effectively target tumor cells expressing B7-H3 and increase anti-tumor T cell activity to increase the immune response.
- the antibody or antigen-binding fragment thereof may be used with other anti-neoplastic or immunogenic agents, such as weakened cancer cells, tumor antigens (including recombinant proteins, peptides and carbohydrate molecules), antigen-transferring cells (e.g.
- the anti-B7-H3 antibody or antigen-binding fragment thereof according to the present invention, and a pharmaceutical composition comprising the same may be administered simultaneously with or sequentially with an existing anticancer therapeutic agent.
- the present invention also provides a composition for diagnosis of cancer or tumor, autoimmune disease or inflammatory disease comprising the anti-B7-H3 antibody or antigen-binding fragment thereof, the antibody-drug conjugate, or the multispecific antibody, and the disease using the same Provides a diagnostic method of
- the expression level of B7-H3 in a sample through the anti-B7-H3 antibody or antigen-binding fragment thereof, the antibody-drug conjugate, or the multispecific antibody according to the present invention cancer or tumor, autoimmune disease or Inflammatory diseases can be diagnosed.
- the expression level can be measured according to a conventional immunoassay method, and radioimmunoassay, radioimmunoprecipitation, immunoprecipitation, immunohistochemical staining, ELISA (enzyme-linked immunosorbent assay), and capture using an antibody against B7-H3 -ELISA, inhibition or hardwood analysis, sandwich analysis, flow cytometry, immunofluorescence staining and immunoaffinity purification may be used to measure, but is not limited thereto.
- a normal biological sample eg, normal gastric tissue, blood, plasma, or serum
- the present invention also provides a diagnostic kit comprising the diagnostic composition.
- the kit according to the present invention may include an anti-B7-H3 antibody or antigen-binding fragment thereof according to the present invention, or an antibody-drug conjugate or multispecific antibody comprising the same, and a label generating a detectable signal.
- the label is a chemical substance (e.g., biotin) bound to an antibody, an enzyme (alkaline phosphatase, ⁇ -galactosidase, horse radish peroxidase, luciferase or cytochrome P450), a radioactive substance (e.g., C14, I125, P32 and S35), a fluorescent material (eg, fluorescein), a luminescent material, a chemiluminescent material, and a fluorescence resonance energy transfer (FRET), but are not limited thereto.
- an enzyme alkaline phosphatase, ⁇ -galactosidase, horse radish peroxidase, luciferase or cytochrome P450
- a radioactive substance e.g., C14, I125, P32 and S35
- a fluorescent material eg, fluorescein
- luminescent material e.g, chemiluminescent material
- FRET fluorescence resonance energy
- the substrate for the enzyme is bromochloroindolyl phosphate (BCIP), nitro blue tetrazolium (NBT), naphthol-AS-B1-phosphate (naphthol-
- BCIP bromochloroindolyl phosphate
- NBT nitro blue tetrazolium
- naphthol-AS-B1-phosphate naphthol-
- ECF enhanced chemifluorescence
- horse radish peroxidase chloronaphthol, aminoethylcarbazole, diaminobenzidine, D-luciferin, lucigenin ( Bis-N-methylacridinium nitrate), resorupine benzyl ether, luminol, Amplex Red reagent (10-acetyl-3,7-dihydroxyphenoxazine), HYR (p-phenylenediamine-HCl and pyrocatechol), TMB (tetramethylbenzidine),
- Cancer or tumor autoimmune disease or inflammatory disease can be diagnosed by analyzing the intensity of a signal indicated by the reaction between the sample and the antibody. Measurement of the activity or signal of an enzyme used for diagnosis can be performed according to various methods known in the art, through which B7-H3 expression can be analyzed qualitatively or quantitatively.
- Example 1-1 B7-H3 protein expression vector construction
- Example 1-2 Expression and purification of B7-H3 antigen
- Transfection was performed using PEI (polyethylenimine, 23966, Polysciences) under optimized conditions.
- Human HEK293F cells were inoculated into a medium (#Freestyle 293 AGT type; AG100009P1, Thermo.) as much as 5 ⁇ 10 5 cells per ml, and cultured until 1 ⁇ 10 6 cells/ml.
- a medium #Freestyle 293 AGT type; AG100009P1, Thermo.
- Soytone #212488, DIFCO
- the expressed B7-H3-Fc antigens were sequentially purified using protein A agarose and Superdex 200 (1.5 cm*100 cm) gel filtration chromatography. Each antigen-producing culture medium was centrifuged at 8,000 rpm for 30 minutes to remove cell debris, and filtered using a bottle top filter having a pore size of 0.22 ⁇ m. To perform purification, 3 ml of Ni-NTA resin (#30230, QIAGEN,) was added to an empty column, and then the resin was packed with 20 ml of binding buffer (10 mM imidazole). The culture solution filtered through the packed resin was flowed at a gravity-flow rate so as to bind to the resin at a rate of 0.2 ml per minute.
- the obtained E. coli was cultured at 30°C for 16 hours.
- the culture medium was centrifuged to concentrate the supernatant with polyethylene glycol (PEG), and then dissolved in a phosphate buffered saline (PBS) buffer to prepare human antibody library phage.
- PEG polyethylene glycol
- PBS phosphate buffered saline
- Example 2-2 The library phage obtained in Example 2-2 was put in the immunosorbent tube prepared in Example 2-1, reacted for 2 hours at room temperature, washed with 1x PBST and 1x PBS, and then 100 mM TAE and Tris-HCl (pH7.5 ) The solutions were sequentially treated to elute only scFv-phages specifically bound to the antigen.
- a pool of positive phage is obtained, and the number of times in the PBST (PBS + tween-20) washing step is increased with the phage amplified in the first round of panning.
- round 2 and round 3 panning were performed in the same manner. As a result, as shown in Table 2, it was confirmed that the number of phages bound to the antigen was slightly increased in 3 rounds of panning.
- Example 2-4 Polyphage ELISA
- Poly phage ELISA was performed to examine the antigen specificity of the positive poly scFv-phage antibody pool obtained through panning of each round.
- Immuno-plate coated with antigens B7-H3-His (Sino) and B7-H3-His (in house), respectively, and coated with ITGA6-Fc protein used as an indicator of nonspecific binding ELISA was performed simultaneously with the phage pool obtained in each round using the prepared immuno-plate.
- As a negative control for ELISA #38, an M13 phage in which the antibody was not displayed, was used together.
- Example 2-5 Positive phage selection
- Example 2-6 Base sequence analysis of positive phage antibody
- phagemid DNA was isolated using a DNA purification kit (Qiagen, Germany) and sequenced. As a result of analyzing the sequence of the CDR3 regions of the heavy and light chains, the clones as shown in Table 3 were identified.
- amino acid sequences of the heavy and light chain CDRs and variable regions are as described in Tables 4 and 5.
- sequences of the polynucleotides encoding the heavy and light chain variable regions are shown in Table 6 below.
- Example 3-1 Conversion of scFv form to IgG form (conversion)
- the base sequence of the heavy chain variable region was cloned into pNATVH (Y-Biologics) using the restriction enzyme SfiI/NheI site, and the N293F HC vector was Then, the base sequence of the light chain variable region was cloned into pNATVL (Y-Biologics) using the restriction enzyme SfiI/BglII site to prepare an N293F LC vector.
- Example 3-2 Human antibody production and purification
- the N293F HC and N293F LC vectors were co-transfected into HEK293F cells (co-transfection), and the culture solution was collected on the 7th day of culture, centrifugation and 0.22 ⁇ m Top-filter to remove cells and suspended matter, and then the supernatant was removed. Collected and purified by protein A beads (protein A bead). The purity of the anti-B7-H3 antibody was analyzed using SDS-PAGE (Fig. 4).
- the culture medium was centrifuged at 8,000 rpm for 30 minutes to remove cell debris, and filtered using a bottle top filter (Sterritop-GP Filter Unit. #SCGPS01RE, Millipore) having a pore size of 0.22 ⁇ m. Meanwhile, 4 ml of Protein A Sepharose resin slurry (KANEKA KanCapATM, Cat. No. KKC20170403_01) was added to an empty column (#BR731-1550, Bio-rad), and then 100 ml of DPBS (#LB001-02) was used. Was packed and washed. The filtered medium was loaded on the packed resin and flowed at a rate of 1 ml per minute (#EP-1 Econo pump, Bio-Rad).
- the gel was separated from the tank, soaked in a dyeing buffer, and dyed on a stirrer for 1 hr. Thereafter, the dyeing solution was discarded and decolorized while stirring with the decolorizing solution for about 1 hour, and the decolorizing solution was exchanged once more to decolorize again. After the gel after decolorization was washed with distilled water, the image was stored using an imaging equipment.
- Example 4-1 Specific avidity to human B7-H3 expressed on the cell surface (FACs)
- Each of the cells expressing human B7-H3 was prepared to be 0.5 ⁇ 10 6 cells per sample, and the antibodies were each diluted in a constant multiple, and then reacted with the prepared cells at 4° C. for 30 minutes. Thereafter, the cells were washed three times with PBS (#LB001-02, welgene) containing 2% fetal bovine serum, and an anti-human IgG antibody (#LB001-02, welgene) conjugated with FITC (fluorescein isothiocyanate) fluorescent substance (# FI-3000, Vectorlabs) or PE-anti-hIgG antibody (#555787, BD) was used to react at 4° C. for 20 minutes, followed by washing as described above.
- PBS #LB001-02, welgene
- FITC fluorescein isothiocyanate
- PE-anti-hIgG antibody #555787, BD
- An Octet QK instrument (Fortebio Inc.) was used to measure the binding affinity of the antibody to the B7-H3 antigen based on the principle of biolayer interferometry (BLI).
- the selected anti-B7-H3 antibody was immobilized on an AHC (Anti-Human IgG Fc Capture) biosensor (Fortebio Inc.), and affinity (KD) was obtained by binding to the human B7-H3 antigen prepared by concentration thereto. .
- Kinetic buffer (Fortebio Inc.) was used for all buffers.
- the biosensor was immersed in a buffer to stabilize, and the anti-B7-H3 antibody dissolved in the buffer at a concentration of 10 ⁇ g/ml was reacted for about 5 minutes, and then fixed to the AHC biosensor.
- the biosensor was washed with a buffer for 3-5 minutes to remove unimmobilized antibodies, and a binding reaction was performed with the B7-H3 antigen prepared by concentration (30 nM ⁇ 0.24 nM) for 10 minutes, and then a dissociation reaction was performed for 10 minutes. I did. All experiments were performed at 30° C. and 1,000 rpm, and sensorgram data during binding and dissociation over time were collected.
- KD Equilibrium dissociation constant
- a TMB substrate solution (#T0440-1L, Sigma) was added and reacted at room temperature for at least 3 minutes while blocking the light to confirm color development, and a 1-normal sulfuric acid solution (#S1478, Samchun) was added to stop the reaction.
- the absorbance was measured at 450 nm using a spectrophotometer (#GM3000, Promega or SpectraMaxM5, Molecular devices). It was confirmed that the selected single B7-H3 antibody has a concentration-related binding ability not only to the human B7-H3 antigen, but also to the mouse, rat, and cynomolgus monkey B7-H3 antigen (FIGS. 7A to 7E ).
- Example 4-5 Adhesion by pH to FcRN (ELISA)
- Calu-6 cell line 1ml growth medium (RPMI1640(#A10491-01, Gibco), 10% FBS(#26140-079, Gibco), 1X Antibiotic-Antimycotic(#15240-062, Gibco), 100x MEM NEAA(#11140) -050, Gibco)), diluted to 1, 2, or 4x10 5 , and then added 50 ⁇ l to each well of a 96-well plate (#3595, Corning) and incubated in a 37°C CO 2 incubator for 24 hours or longer.
- A498 cell line 1ml growth medium (DMEM (#SH30243.01, HyclonTM), 10% FBS (#26140-079, Gibco), 1X Antibiotic-Antimycotic (#15240-062, Gibco), 100x MEM NEAA (#11140- 050, Gibco)) to 1, 2, or 4x10 4 , and then put 50 ⁇ l into each well of a 96-well plate (#3595, Corning) and incubated in a 37°C CO 2 incubator for 24 hours or longer.
- DMEM DMEM
- FBS fetal bovine serum
- 1X Antibiotic-Antimycotic #15240-062, Gibco
- 100x MEM NEAA #11140- 050, Gibco
- the antibody to be tested and IncuCyte TM FabFluor Red (# 4722, essen bioscience) were mixed at a molar ratio of 1:3 and allowed to stand at 37°C for 15 minutes, and 50 ⁇ l was carefully added to the well containing the cells.
- the plate was placed in a CO 2 incubator equipped with IncuCyte ZOOM (essen bioscience, USA) and internalization was observed.
- the scanning conditions were measured at 100 or 200 times magnification for 24 hours at 30 minute intervals, but 4 images were scanned for each well by time.
- the scanned image was edited in the IncuCyte ZOOM 2016B program, and analyzed using the One phase association function of the Non-linear fit of Graphpad PRISM (Fig.
- Incucyte FabFlour Red reagent has a characteristic that it does not fluoresce at neutral pH and emits red fluorescence as acidic pH increases. After binding of the cell surface B7-H3 antigen and the antibody, it enters the cell through the endosome, and when it is fused to the lysosome, it is exposed to an acidic pH ( ⁇ 4.7) environment, thus emitting strong red fluorescence.
- red cells increased with time inside the cells (Red object count/well or Total Red Object Area, um2/well). From this, it can be seen that B7-H3 on the cell surface is a target for influx of antibodies into cells, and influx of anti-B7-H3 antibodies into cells increases with time.
- Example 4-7 Influx of B7-H3 antigen-antibody complex into cells (FabZAP)
- the influx of the antibody into the cells was confirmed as a cytotoxic effect.
- Saporin as a ribosome inhibitor, causes cytotoxicity when introduced into cells and released.
- the FabZAP protein to which saporin is conjugated was diluted to 45 nM in a growth medium, and the antibody was diluted at a constant magnification with this solution, and then allowed to stand at room temperature for 15 minutes to react to conjugate Saporin.
- Saporin to be used as a negative control was prepared by making a 10 uM solution and then serially diluted at a constant rate, and another negative control, Control-SAP, was prepared by preparing a 100 nM solution and then diluted at a constant rate.
- the A498 renal cancer cell line was diluted with growth medium and plated on a 96-well culture plate at 1 ⁇ 10e3/well, and cultured in a 37°C CO 2 incubator for 16 hours or longer.
- 50 ul of the XTT substrate solution prepared in PBS was added to each well and reacted in a CO2 incubator at 37° C.
- the anti-B7-H3 antibody or antigen-binding fragment thereof binds human and non-human B7-H3 with high affinity and can be introduced into cells after binding, so that the anti-B7-H3 antibody or antigen-binding fragment thereof Fragments, antibody-drug conjugates or multispecific antibodies comprising the same may be usefully used in the prevention or treatment of cancer or tumor, autoimmune disease or inflammatory disease, or diagnosis.
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Abstract
Description
Claims (16)
- 서열번호 1, 7, 13 및 19로 구성된 군에서 선택되는 중쇄(heavy chain) CDR(Complementarity Determining Region)1,서열번호 2, 8, 14 및 20으로 구성된 군에서 선택되는 중쇄 CDR2,서열번호 3, 9, 15 및 21로 구성된 군에서 선택되는 중쇄 CDR3,서열번호 4, 10, 16, 22, 24, 26, 28, 30, 33 및 35로 구성된 군에서 선택되는 경쇄(light chain) CDR1,서열번호 5, 11, 17 및 31로 구성된 군에서 선택되는 경쇄 CDR2, 및서열번호 6, 12, 18, 23, 25, 27, 29, 32, 34 및 36으로 구성된 군에서 선택되는 경쇄 CDR3를 포함하는 항-B7-H3 항체 또는 그의 항원 결합 단편.
- 제1항에 있어서,서열번호 1의 중쇄 CDR1, 서열번호 2의 중쇄 CDR2, 서열번호 3의 중쇄 CDR3, 서열번호 4의 경쇄 CDR1, 서열번호 5의 경쇄 CDR2, 및 서열번호 6의 경쇄 CDR3;서열번호 7의 중쇄 CDR1, 서열번호 8의 중쇄 CDR2, 서열번호 9의 중쇄 CDR3, 서열번호 10의 경쇄 CDR1, 서열번호 11의 경쇄 CDR2, 및 서열번호 12의 경쇄 CDR3;서열번호 13의 중쇄 CDR1, 서열번호 14의 중쇄 CDR2, 서열번호 15의 중쇄 CDR3, 서열번호 16의 경쇄 CDR1, 서열번호 17의 경쇄 CDR2, 및 서열번호 18의 경쇄 CDR3;서열번호 19의 중쇄 CDR1, 서열번호 20의 중쇄 CDR2, 서열번호 21의 중쇄 CDR3, 서열번호 22의 경쇄 CDR1, 서열번호 11의 경쇄 CDR2, 및 서열번호 23의 경쇄 CDR3;서열번호 19의 중쇄 CDR1, 서열번호 20의 중쇄 CDR2, 서열번호 21의 중쇄 CDR3, 서열번호 24의 경쇄 CDR1, 서열번호 11의 경쇄 CDR2, 및 서열번호 25의 경쇄 CDR3;서열번호 19의 중쇄 CDR1, 서열번호 20의 중쇄 CDR2, 서열번호 21의 중쇄 CDR3, 서열번호 26의 경쇄 CDR1, 서열번호 11의 경쇄 CDR2, 및 서열번호 27의 경쇄 CDR3;서열번호 19의 중쇄 CDR1, 서열번호 20의 중쇄 CDR2, 서열번호 21의 중쇄 CDR3, 서열번호 28의 경쇄 CDR1, 서열번호 5의 경쇄 CDR2, 및 서열번호 29의 경쇄 CDR3;서열번호 19의 중쇄 CDR1, 서열번호 20의 중쇄 CDR2, 서열번호 21의 중쇄 CDR3, 서열번호 30의 경쇄 CDR1, 서열번호 31의 경쇄 CDR2, 및 서열번호 32의 경쇄 CDR3;서열번호 19의 중쇄 CDR1, 서열번호 20의 중쇄 CDR2, 서열번호 21의 중쇄 CDR3, 서열번호 33의 경쇄 CDR1, 서열번호 11의 경쇄 CDR2, 및 서열번호 34의 경쇄 CDR3; 또는서열번호 19의 중쇄 CDR1, 서열번호 20의 중쇄 CDR2, 서열번호 21의 중쇄 CDR3, 서열번호 35의 경쇄 CDR1, 서열번호 11의 경쇄 CDR2, 및 서열번호 36의 경쇄 CDR3를 포함하는 항-B7-H3 항체 또는 그의 항원 결합 단편.
- 제1항에 있어서, 서열번호 37, 39, 41 또는 43의 중쇄 가변영역을 포함하는 항-B7-H3 항체 또는 그의 항원 결합 단편.
- 제1항에 있어서, 서열번호 38, 40, 42, 44, 45, 46, 47, 48, 49 또는 50의 경쇄 가변영역을 포함하는 항-B7-H3 항체 또는 그의 항원 결합 단편.
- 제1항 내지 제4항 중 어느 한 항의 항-B7-H3 항체 또는 그의 항원 결합 단편을 코딩하는 핵산.
- 제5항에 따른 핵산을 포함하는 재조합 발현 벡터.
- 제6항에 따른 재조합 발현 벡터로 형질전환된 세포.
- 제7항에 있어서, 동물세포, 식물세포, 효모, 대장균 및 곤충세포로 구성된 군에서 선택되는 것을 특징으로 하는 세포.
- 제7항에 있어서, COS-7(monkey kidney cells 7) 세포, NSO 세포, SP2/0 세포, CHO(Chinese hamster ovary) 세포, W138, BHK(baby hamster kidney) 세포, MDCK, 골수종 세포주, HuT 78 세포 및 HEK293 세포, 대장균, 바실러스 서브틸리스(Bacillus subtilis), 스트렙토마이세스 속(Streptomyces sp.), 슈도모나스 속(Pseudomonas sp.), 프로테우스 미라빌리스(Proteus mirabilis), 스타필로코쿠스 속(Staphylococcus sp.), 아스페르길러스 속(Aspergillus sp.), 피치아 파스토리스(Pichiapastoris), 사카로마이세스 세레비지애(Saccharomyces cerevisiae), 쉬조사카로마세스 속(Schizosaccharomyces sp.) 및 뉴로스포라 크라사(Neurospora crassa)로 구성된 군에서 선택되는 것을 특징으로 하는 세포.
- (i) 제7항에 따른 세포를 배양하는 단계; 및 (ii) 얻어진 세포 배양액으로부터 항-B7-H3 항체 또는 그의 항원 결합 단편을 회수하는 단계를 포함하는 항-B7-H3 항체 또는 그의 항원 결합 단편의 제조 방법.
- 제1항 내지 제4항 중 어느 한 항의 항체 또는 그의 항원 결합 단편 및 약물을 포함하는 항체-약물 접합체(antibody-drug conjugate, ADC).
- 제1항 내지 제4항 중 어느 한 항의 항체 또는 그의 항원 결합 단편을 포함하는 다중특이적 항체.
- 유효성분으로서 제1항의 항-B7-H3 항체 또는 그의 항원 결합 단편, 제11항의 항체-약물 접합체 또는 제12항의 다중특이적 항체 및 약학적으로 허용되는 첨가제를 포함하는 암 또는 종양, 자가면역 질환 또는 염증성 질환의 예방 또는 치료용 약학 조성물.
- 제13항에 있어서, 상기 암 또는 종양은 전립선암, 난소암, 유방암, 결장암, 신장암, 비소세포폐암, 췌장암, 두경부암, 흑색종, 아교모세포종 및 신경모세포종으로 구성된 군에서 선택되는 것을 특징으로 하는 약학 조성물.
- 제13항에 있어서, 상기 자가면역 질환 또는 염증성 질환은 천식, 류마티스 관절염 및 다발성 경화증으로 구성된 군에서 선택되는 것을 특징으로 하는 약학 조성물.
- 제1항의 항-B7-H3 항체 또는 그의 항원 결합 단편, 제11항의 항체-약물 접합체, 또는 제12항의 다중특이적 항체를 포함하는 암 또는 종양, 자가면역 질환 또는 염증성 질환의 진단용 조성물.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20837727.5A EP3998283A4 (en) | 2019-07-09 | 2020-07-08 | ANTIBODIES SPECIFIC TO B7-H3 BINDING AND USE THEREOF |
| JP2021563149A JP7247368B2 (ja) | 2019-07-09 | 2020-07-08 | B7-h3に特異的に結合する抗体およびその使用 |
| US17/594,523 US12606625B2 (en) | 2019-07-09 | 2020-07-08 | Antibody binding specifically to B7—H3 and use thereof |
| CN202080030515.XA CN114096563B (zh) | 2019-07-09 | 2020-07-08 | 与b7-h3特异性结合的抗体及其用途 |
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|---|---|---|---|
| KR10-2019-0082492 | 2019-07-09 | ||
| KR1020190082492A KR102732027B1 (ko) | 2019-07-09 | 2019-07-09 | B7-h3(cd276)에 특이적으로 결합하는 항체 및 그의 용도 |
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| WO2021006619A1 true WO2021006619A1 (ko) | 2021-01-14 |
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| PCT/KR2020/008928 Ceased WO2021006619A1 (ko) | 2019-07-09 | 2020-07-08 | B7-h3에 특이적으로 결합하는 항체 및 그의 용도 |
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| Country | Link |
|---|---|
| US (1) | US12606625B2 (ko) |
| EP (1) | EP3998283A4 (ko) |
| JP (1) | JP7247368B2 (ko) |
| KR (1) | KR102732027B1 (ko) |
| CN (1) | CN114096563B (ko) |
| WO (1) | WO2021006619A1 (ko) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022170971A1 (zh) | 2021-02-09 | 2022-08-18 | 苏州宜联生物医药有限公司 | 生物活性物偶联物及其制备方法和用途 |
| CN115154474A (zh) * | 2021-04-01 | 2022-10-11 | 中国人民解放军总医院 | 一种环菠萝蜜烷型三萜皂苷化合物在制备t细胞免疫抑制剂中的应用 |
| WO2023155808A1 (zh) | 2022-02-16 | 2023-08-24 | 苏州宜联生物医药有限公司 | 抗体-艾日布林或其衍生物的偶联物、其中间体、制备方法、药物组合物和用途 |
| CN117024592A (zh) * | 2023-08-24 | 2023-11-10 | 四川大学华西医院 | 抗b7h3抗体及其用途 |
| WO2023221975A1 (zh) | 2022-05-18 | 2023-11-23 | 苏州宜联生物医药有限公司 | 包含蛋白降解剂类生物活性化合物的抗体药物偶联物及其制备方法和用途 |
| JP2025507144A (ja) * | 2022-03-18 | 2025-03-13 | ベイジン マブワークス バイオテック カンパニー リミテッド | 抗体結合b7-h3及びその使用 |
| EP4171655A4 (en) * | 2020-06-26 | 2025-05-28 | Intocell, Inc. | Antibody-drug conjugates with anti-B7-H3 antibodies |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU2023273853A1 (en) * | 2022-05-18 | 2024-10-24 | WuXi Biologics Ireland Limited | Anti-b7h3 antibody and uses thereof |
| CN118406150A (zh) * | 2022-08-26 | 2024-07-30 | 四川大学 | 一种抗b7-h3抗体及其应用 |
| IL320800A (en) * | 2022-11-11 | 2025-07-01 | Antengene Biologics Ltd | New multispecific antibodies and their uses |
| WO2025036476A1 (en) * | 2023-08-16 | 2025-02-20 | Biocytogen Pharmaceuticals (Beijing) Co., Ltd. | Anti-b7-h3 antibodies and uses thereof |
| CN119661709A (zh) * | 2023-09-21 | 2025-03-21 | 北京泰德制药股份有限公司 | 结合b7-h3的抗体及其用途 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4171655A4 (en) * | 2020-06-26 | 2025-05-28 | Intocell, Inc. | Antibody-drug conjugates with anti-B7-H3 antibodies |
| WO2022170971A1 (zh) | 2021-02-09 | 2022-08-18 | 苏州宜联生物医药有限公司 | 生物活性物偶联物及其制备方法和用途 |
| CN115154474A (zh) * | 2021-04-01 | 2022-10-11 | 中国人民解放军总医院 | 一种环菠萝蜜烷型三萜皂苷化合物在制备t细胞免疫抑制剂中的应用 |
| WO2023155808A1 (zh) | 2022-02-16 | 2023-08-24 | 苏州宜联生物医药有限公司 | 抗体-艾日布林或其衍生物的偶联物、其中间体、制备方法、药物组合物和用途 |
| JP2025507144A (ja) * | 2022-03-18 | 2025-03-13 | ベイジン マブワークス バイオテック カンパニー リミテッド | 抗体結合b7-h3及びその使用 |
| WO2023221975A1 (zh) | 2022-05-18 | 2023-11-23 | 苏州宜联生物医药有限公司 | 包含蛋白降解剂类生物活性化合物的抗体药物偶联物及其制备方法和用途 |
| CN117024592A (zh) * | 2023-08-24 | 2023-11-10 | 四川大学华西医院 | 抗b7h3抗体及其用途 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3998283A4 (en) | 2023-01-11 |
| JP2022530435A (ja) | 2022-06-29 |
| US12606625B2 (en) | 2026-04-21 |
| CN114096563B (zh) | 2025-04-18 |
| KR102732027B1 (ko) | 2024-11-20 |
| US20220348663A1 (en) | 2022-11-03 |
| EP3998283A1 (en) | 2022-05-18 |
| CN114096563A (zh) | 2022-02-25 |
| JP7247368B2 (ja) | 2023-03-28 |
| KR20210006637A (ko) | 2021-01-19 |
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