WO2024140627A1 - 抗多种血清型aav衣壳蛋白的单克隆抗体及其制备方法和用途 - Google Patents
抗多种血清型aav衣壳蛋白的单克隆抗体及其制备方法和用途 Download PDFInfo
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- WO2024140627A1 WO2024140627A1 PCT/CN2023/141746 CN2023141746W WO2024140627A1 WO 2024140627 A1 WO2024140627 A1 WO 2024140627A1 CN 2023141746 W CN2023141746 W CN 2023141746W WO 2024140627 A1 WO2024140627 A1 WO 2024140627A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/569—Immunoassay; Biospecific binding assay; Materials therefor for microorganisms, e.g. protozoa, bacteria, viruses
- G01N33/56983—Viruses
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
- C07K16/08—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from viruses
- C07K16/081—DNA viruses
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/18—Injection using a septum or microsyringe
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/577—Immunoassay; Biospecific binding assay; Materials therefor involving monoclonal antibodies binding reaction mechanisms characterised by the use of monoclonal antibodies
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
- C07K2317/33—Crossreactivity, e.g. for species or epitope, or lack of said crossreactivity
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2317/00—Immunoglobulins specific features
- C07K2317/90—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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/005—Assays involving biological materials from specific organisms or of a specific nature from viruses
- G01N2333/01—DNA viruses
- G01N2333/015—Parvoviridae, e.g. feline panleukopenia virus, human Parvovirus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/96—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation using ion-exchange
Definitions
- the heavy chain CDR and light chain CDR are selected from the following sequences:
- the monoclonal antibody or its functional fragment against multiple serotypes of AAV capsid proteins comprises a heavy chain variable region and a light chain variable region, wherein the heavy chain variable region and the light chain variable region are selected from the group consisting of variable regions of the amino acid sequences shown in SEQ ID NOs: 4 to 7 and variants thereof each comprising an amino acid sequence with at least 80% identity, and the combination of the group is defined by A and/or B:
- the heavy chain variable region sequence comprises an amino acid sequence that is at least 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99% identical to the amino acid sequence shown in SEQ ID NO:4 or 6;
- the light chain variable region sequence comprises an amino acid sequence that is at least 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99% identical to the amino acid sequence shown in SEQ ID NO:5 or 7.
- the heavy chain variable region comprises an amino acid sequence that is at least 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99% identical to the sequence shown in SEQ ID NO:4, and the light chain variable region comprises an amino acid sequence that is at least 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99% identical to the sequence shown in SEQ ID NO:5. An amino acid sequence with 97%, 98% or 99% identity; or
- the heavy chain variable region comprises the amino acid sequence shown in SEQ ID NO:4, and the light chain variable region comprises the amino acid sequence shown in SEQ ID NO:5; or
- the heavy chain variable region and the light chain variable region are selected from the following sequences:
- the monoclonal antibody against multiple serotypes of AAV capsid proteins or a functional fragment thereof is a rabbit antibody, a chimeric antibody, a humanized antibody or a human antibody.
- “Rabbit antibody” refers to the variable region and constant region (if present) derived from rabbit immunoglobulin
- the rabbit antibody can be conveniently obtained by immunizing a rabbit with the corresponding antigen and isolating the target antibody therefrom.
- the cells expressing the target antibody such as B cells
- the cells expressing the target antibody are isolated and cultured, and the cells are fused with immortalized cells such as myeloma cells to obtain hybridoma cells.
- the target antibody (such as monoclonal antibody) can be obtained for a long time and in large quantities by culturing the hybridoma cells.
- chimeric antibody refers to an antibody formed by fusing the variable region of a first animal-derived antibody with the constant region of a second animal-derived antibody.
- a hybridoma that secretes a specific monoclonal antibody of the first animal must first be established, and then the variable region gene must be cloned from the hybridoma cell, and then the constant region gene of the second animal-derived antibody must be cloned as needed, and the variable region gene of the first animal-derived variable region gene and the constant region gene of the second animal-derived constant region gene must be connected into a chimeric gene and inserted into an expression vector, and finally the chimeric antibody molecule is expressed in a eukaryotic system or a prokaryotic system.
- humanized antibody also known as CDR-grafted antibody, refers to an antibody produced by transplanting the CDR sequence of the first animal origin into the human antibody variable region framework, that is, different types of human germline antibody framework sequences. It can overcome the heterologous reaction induced by chimeric antibodies due to carrying a large amount of rabbit protein components.
- framework sequences can be obtained from public DNA databases including germline antibody gene sequences or published references.
- the germline DNA sequences of human heavy chain and light chain variable region genes can be obtained in the "VBase" human germline sequence database (www.mrccpe.com.ac.uk/vbase), and in Kabat, E.A. et al., 1991, Sequences of Proteins of Immunological Interest, 5th edition.
- the human antibody variable region framework sequence can be subjected to minimal reverse mutation or back mutation to maintain activity.
- the monoclonal antibodies or functional fragments thereof raised against multiple serotype AAV capsid proteins are detectably labeled.
- Animal viruses that can be used as vectors include but are not limited to retroviruses (including lentiviruses), adenoviruses, adeno-associated viruses, herpes viruses (such as herpes simplex virus), poxviruses, baculoviruses, papillomaviruses, papillomas (such as SV40).
- the present invention provides a host cell or a cell-free expression system comprising the expression vector.
- Host cells or cell lines suitable for expressing the antigen-binding proteins of the present invention include mammalian cells such as NS0, Sp2/0, CHO, COS, HEK, fibroblasts and myeloma cells. Human cells can be used, thus allowing the molecules to be modified with human glycosylation patterns. Alternatively, other eukaryotic cell lines can be used. The selection of suitable mammalian host cells, as well as methods for transformation, cultivation, amplification, screening and product production and purification, are known in the art.
- the matrix support comprises any one of agar, agarose, agarose derivatives, magnetic beads, silica, titanium dioxide, alginate, cellulose, cellulose derivatives, dextran, starch, cyclodextrin, chitosan, carrageenan, guar gum, gum arabic, gum ghatti, tragacanth gum, karaya gum, locust bean gum, xanthan gum, pectin, mucin, heparin, gelatin, silicon, ceramic, glass (e.g., borosilicate glass), polyurethane, polystyrene, polystyrene divinylbenzene, polymethyl methacrylate, polyacrylamide, polyethylene terephthalate, polyvinyl acetate, polyethylene, polypropylene, polyvinyl chloride, polyvinyl pyrrolidone, or copolymers of any of the above.
- agar agarose, agarose derivatives, magnetic beads, silic
- chromatographic separation devices including but not limited to the following: SPE solid phase extraction columns, centrifuge tubes with separation membranes, magnetic beads, separation membranes, rapid detection bio-chips, fiber bundle columns, and the chromatographic separation device is preferably columnar, such as a monolithic column and a conventional analytical or preparative grade chromatography column.
- FIG3 shows the ELISA reaction results of 24F7-1 monoclonal antibody and AAV of different serotypes
- AAV adeno-associated virus
- Parvoviridae a non-enveloped single-stranded linear DNA virus. The genome is about 4.7 kb long, and the Cap gene encodes three viral capsid proteins: VP1, VP2, and VP3.
- AAVrh.1 is an AAV virus isolated from rhesus monkeys, and like other AAV viruses, it is susceptible to multiple tissues and organs in the human body.
- isolated polynucleotide refers to a polynucleotide that does not exist naturally in nature, including polynucleotides isolated from nature (including organisms) by biological techniques, and also includes artificially synthesized polynucleotides.
- the isolated polynucleotide can be genomic DNA, cDNA, mRNA or other synthetic RNA, or a combination thereof. It should be noted that those skilled in the art can design nucleotide sequences that are not completely identical to the nucleotide sequences provided based on the amino acid sequences of the heavy chain variable region and the light chain variable region provided herein, based on codon degeneracy, but all encode the same amino acid sequence. These modified nucleotide sequences are also included in the scope of the present invention.
- New Zealand white rabbits were immunized with 100 ⁇ g of recombinant rh.1 AAV virus-like particles (AAVrh.1 VLP, capsid protein VP1, VP2 and VP3 protein sequences are shown in SEQ ID NO: 1, 2 and 3). Subsequently, the immunization was repeated every other week to boost the experimental rabbits for a total of 3 times. The serum titers of the two rabbits reached more than 10 5 after 3 immunizations (Figure 1). Sterile blood was collected from the experimental rabbit numbered R05999 7 days after the last immunization for subsequent antibody discovery.
- Amino acid sequence of AAV capsid protein VP1 of rh.1 serotype (SEQ ID NO: 1):
- Amino acid sequence of AAV capsid protein VP3 of rh.1 serotype (SEQ ID NO: 3):
- Indirect ELISA was used to evaluate the binding ability of antibodies in the supernatant to VLPs.
- AAVrh.1 VLPs were diluted to 1 ⁇ g/mL with PBS and 100 ⁇ L per well was coated on a 96-well ELISA plate overnight at 4°C. After washing with PBST (0.05% Tween), 150 ⁇ L/well of PBST containing 1% BSA was blocked at 37°C for 1 hour. The blocking solution was then discarded, and 100 ⁇ L of B cell culture supernatant was added to each plate, followed by incubation at 37°C for 1 hour.
- TRIzol Life Technology, 15596-026 was used to extract RNA from total cells in wells with OD values greater than 1.0, and reverse transcribed into cDNA using universal primers (Prime Script TM 1st Strand cDNA Synthesis Kit, Takara). Rabbit immunoglobulin heavy and light chain V-region fragments were subsequently amplified by RACE PCR, and the amplified fragments were homologously recombined into the pCDNA3.4 vector, and the insert fragments were sequenced using vector-specific primers. Finally, the unique V-region protein amino acid sequences and plasmids of clones 5G4-1 and 24F7-1 were obtained.
- 5G4-1 light chain variable region amino acid sequence (SEQ ID NO: 5):
- Plasmids containing the heavy and light chains of the antibody were co-transfected into ExpiCHO-S TM Cells (Gibco, A29133) cells, and after culturing in a shake flask at 37°C for 6 days, the supernatant was collected for antibody purification.
- Antibody purification steps The protein A column was balanced with a buffer containing 0.05M Tris and 1.5M NaCl (pH8.0). The harvested cell culture supernatant was then diluted 1:1 with 2 ⁇ the above buffer and sterilized by filtration.
- Indirect ELISA was used to evaluate the binding ability of purified antibodies to VLPs of AAV1, AAV2, AAV5, AAV6, AAV8, AAV9, AAVDJ, and AAVrh.1.
- 100 ⁇ L of 1 ⁇ g/mL VLP diluted in PBS was added to each well of a 96-well ELISA plate and coated overnight at 4°C. After washing the plate with PBS-T (0.05% Tween), 150 ⁇ L of 1% BSA in PBST was added to each well and blocked at 37°C for 1 hour. The blocking solution was then discarded and 100 ⁇ L of 1 ⁇ g/mL recombinant ELISA was added to each plate. The antibody was added and then incubated at 37°C for 1 hour.
- Example 6 EC 50 test of monoclonal antibodies binding to various serotypes of AAV virus VLPs
- Indirect ELISA was used to evaluate the binding ability of purified antibodies to VLPs of various serotypes of AAV viruses.
- 1 ⁇ g/mL of VLPs of each serotype of AAV were coated on 96-well ELISA plates and coated overnight at 4°C. After washing with PBS-T (0.05% Tween), 250 ⁇ L of PBST containing 1% BSA was added to each well and blocked at 37°C for 2 hours. The blocking solution was then discarded, and 100 ⁇ L of 1 ⁇ g/mL purified antibody was added to the first well and diluted in a 3-fold gradient, with a total of 11 test concentration gradients plus a control well with only PBST added. Then incubate at 37°C for 1 hour.
- VLPs of AAV1, AAV2, AAV5, AAV6, AAV8, AAV9, AAVDJ and AAVrh.1 were diluted to 0.015 mg/mL, and each sample was mixed with reducing 2 ⁇ loading buffer at a ratio of 1:1 and then boiled in a water bath for 5 min. 10 ⁇ L of the treated samples were added to the sample wells of 10% precast gel (GenScript, M42012C) for SDS-PAGE electrophoresis and transferred to the NC membrane.
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Abstract
Description
Claims (15)
- 抗多种血清型AAV衣壳蛋白的单克隆抗体或其功能片段,所述抗体或其功能片段包含重链CDR和轻链CDR,所述重链CDR和轻链CDR选自由SEQ ID NO:8~SEQ ID NO:19中所示氨基酸序列的CDR和其各自包含至多三个氨基酸突变的变体所组成的组,且所述组的组合方式由a和/或d所限定:
- 根据权利要求1所述的抗多种血清型AAV衣壳蛋白的单克隆抗体或其功能片段,所述重链CDR和轻链CDR选自如下序列:a.重链CDR1、重链CDR2、重链CDR3、轻链CDR1、轻链CDR2及轻链CDR3的氨基酸序列分别如SEQ ID NO:8,9,10,11,12和13所示;或b.重链CDR1、重链CDR2、重链CDR3、轻链CDR1、轻链CDR2及轻链CDR3的氨基酸序列分别如SEQ ID NO:14,15,16,17,18和19所示。
- 根据权利要求1或2所述的抗多种血清型AAV衣壳蛋白的单克隆抗体或其功能片段,其包括重链可变区和轻链可变区,所述重链可变区和轻链可变区选自由SEQ ID NO:4~SEQ ID NO:7中所示氨基酸序列的可变区和其各自包含至少80%一致性的氨基酸序列的变体所组成的组,且所述组的组合方式由A和/或B所限定:
- 根据权利要求3所述的抗多种血清型AAV衣壳蛋白的单克隆抗体或其功能片段,所述重链可变区和轻链可变区选自如下序列:A.所述重链可变区包含SEQ ID NO:4所示的氨基酸序列,所述轻链可变区包含SEQ ID NO:5所示的氨基酸序列;或B.所述重链可变区包含SEQ ID NO:6所示的氨基酸序列,所述轻链可变区包含SEQ ID NO:7所示的氨基酸序列。
- 根据权利要求1、2、4任一项所述的抗多种血清型AAV衣壳蛋白的单克隆抗体或其功能片段,其是兔源抗体、嵌合抗体、人源化抗体或者人抗体。
- 根据权利要求1、2、4任一项所述的抗多种血清型AAV衣壳蛋白的单克隆抗体或其功能片段,其具有可检测的标记。
- 编码权利要求1~6中任一项所述的抗多种血清型AAV衣壳蛋白的单克隆抗体或其功能片段的分离的多核苷酸。
- 根据权利要求7所述的多核苷酸,其特征在于,所述多核苷酸包含编码所述单克隆抗体或其功能片段的重链可变区的核苷酸序列,和编码所述单克隆抗体或其功能片段的轻链可变区的核苷酸序列。
- 包含根据权利要求7或8所述的多核苷酸的表达载体。
- 包含根据权利要求9所述表达载体的宿主细胞或无细胞表达系统。
- 一种制备抗多种血清型AAV单克隆抗体或其功能片段的方法,包括:在合适的培养条件下培养权利要求10所述的宿主细胞;以及从培养基中或从所培养的细胞中回收如此产生的抗体或其抗原结合片 段。
- 一种检测多种血清型AAV的试剂盒,所述试剂盒中包含权利要求1~6中任一项所述的单克隆抗体或其功能片段。
- 用于分离多种血清型AAV的层析介质,其特征在于,所述层析介质包括基体支持物和固定于所述基体支持物上的权利要求1~6中任一项所述的单克隆抗体或其功能片段。
- 层析分离装置,其特征在于,含有权利要求13所述的层析介质。
- 权利要求1~6中任一项所述抗体或其抗原结合片段在检测和/或纯化多种血清型AAV中的应用;所述多种血清型AAV包括AAV1、AAV2、AAV5、AAV6、AAV8、AAV9、AAVDJ和AAVrh.1中的至少一种;或者所述多种血清型AAV包括AAV1、AAV2、AAV6、AAVDJ和AAVrh.1中的至少一种。
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| CN202380089131.9A CN120435495A (zh) | 2022-12-26 | 2023-12-26 | 抗多种血清型aav衣壳蛋白的单克隆抗体及其制备方法和用途 |
| EP23910552.1A EP4644414A1 (en) | 2022-12-26 | 2023-12-26 | Monoclonal antibody against capsid proteins of multiple aav serotypes, preparation method therefor, and use thereof |
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| CN202211686491.0 | 2022-12-26 | ||
| CN202211686491 | 2022-12-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120399047A (zh) * | 2025-07-01 | 2025-08-01 | 北京溯本源和生物科技有限公司 | 一种用于特异性检测aav6的单克隆抗体1e12及应用 |
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| CN116239679A (zh) * | 2022-12-22 | 2023-06-09 | 北京因诺惟康医药科技有限公司 | 一种可结合多种aav血清型的纳米抗体及其应用 |
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2023
- 2023-12-26 WO PCT/CN2023/141746 patent/WO2024140627A1/zh not_active Ceased
- 2023-12-26 EP EP23910552.1A patent/EP4644414A1/en active Pending
- 2023-12-26 CN CN202380089131.9A patent/CN120435495A/zh active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6093534A (en) * | 1995-03-17 | 2000-07-25 | Hisamitsu Pharmaceutical Co., Inc. | Monoclonal antibody specifically recognizing adeno-associated virus cap protein |
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| US20160030560A1 (en) * | 2014-08-04 | 2016-02-04 | The Research Foundation For The State University Of New York | Methods of treating neurodegenerative conditions |
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| CN120399047A (zh) * | 2025-07-01 | 2025-08-01 | 北京溯本源和生物科技有限公司 | 一种用于特异性检测aav6的单克隆抗体1e12及应用 |
| CN120399047B (zh) * | 2025-07-01 | 2025-09-09 | 北京溯本源和生物科技有限公司 | 一种用于特异性检测aav6的单克隆抗体1e12及应用 |
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| CN120435495A (zh) | 2025-08-05 |
| EP4644414A1 (en) | 2025-11-05 |
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