CA3222300A1 - Bispecific binding agents binding to cldn18.2 and cd3 - Google Patents

Bispecific binding agents binding to cldn18.2 and cd3

Info

Publication number
CA3222300A1
CA3222300A1 CA3222300A CA3222300A CA3222300A1 CA 3222300 A1 CA3222300 A1 CA 3222300A1 CA 3222300 A CA3222300 A CA 3222300A CA 3222300 A CA3222300 A CA 3222300A CA 3222300 A1 CA3222300 A1 CA 3222300A1
Authority
CA
Canada
Prior art keywords
binding agent
amino acid
seq
cancer
acid sequence
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CA3222300A
Other languages
English (en)
French (fr)
Inventor
Matthew Bernett
Alex Nisthal
Gregory Moore
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Astellas Pharma Europe BV
Xencor Inc
Original Assignee
Astellas Pharma Europe BV
Xencor Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Astellas Pharma Europe BV, Xencor Inc filed Critical Astellas Pharma Europe BV
Publication of CA3222300A1 publication Critical patent/CA3222300A1/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P35/00—Antineoplastic agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K2039/505—Medicinal preparations containing antigens or antibodies comprising antibodies
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
    • C07K2317/24—Immunoglobulins specific features characterized by taxonomic origin containing regions, domains or residues from different species, e.g. chimeric, humanized or veneered
    • 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
    • C07K2317/31—Immunoglobulins specific features characterized by aspects of specificity or valency multispecific
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
    • C07K2317/33—Crossreactivity, e.g. for species or epitope, or lack of said crossreactivity
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
    • C07K2317/35—Valency
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/51—Complete heavy chain or Fd fragment, i.e. VH + CH1
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/515—Complete light chain, i.e. VL + CL
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/52—Constant or Fc region; Isotype
    • C07K2317/522—CH1 domain
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/52—Constant or Fc region; Isotype
    • C07K2317/526—CH3 domain
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/55—Fab or Fab'
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
    • C07K2317/565—Complementarity determining region [CDR]
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
    • C07K2317/567—Framework region [FR]
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/60—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/60—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments
    • C07K2317/62—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments comprising only variable region components
    • C07K2317/622—Single chain antibody (scFv)
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/60—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments
    • C07K2317/64—Immunoglobulins specific features characterized by non-natural combinations of immunoglobulin fragments comprising a combination of variable region and constant region components
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/71—Decreased effector function due to an Fc-modification
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/73—Inducing cell death, e.g. apoptosis, necrosis or inhibition of cell proliferation
    • 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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2319/00—Fusion polypeptide

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Biochemistry (AREA)
  • Biophysics (AREA)
  • Genetics & Genomics (AREA)
  • Molecular Biology (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Peptides Or Proteins (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
CA3222300A 2021-06-15 2022-06-15 Bispecific binding agents binding to cldn18.2 and cd3 Pending CA3222300A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
PCT/EP2021/066141 WO2022262959A1 (en) 2021-06-15 2021-06-15 Bispecific binding agents binding to cldn18.2 and cd3
EPPCT/EP2021/066141 2021-06-15
PCT/EP2022/066299 WO2022263508A1 (en) 2021-06-15 2022-06-15 Bispecific binding agents binding to cldn18.2 and cd3

Publications (1)

Publication Number Publication Date
CA3222300A1 true CA3222300A1 (en) 2022-12-22

Family

ID=77519090

Family Applications (1)

Application Number Title Priority Date Filing Date
CA3222300A Pending CA3222300A1 (en) 2021-06-15 2022-06-15 Bispecific binding agents binding to cldn18.2 and cd3

Country Status (15)

Country Link
US (3) US11739145B2 (enExample)
EP (1) EP4355428A1 (enExample)
JP (2) JP7513854B2 (enExample)
KR (1) KR20240032847A (enExample)
CN (1) CN117858906A (enExample)
AR (1) AR126154A1 (enExample)
AU (1) AU2022292895A1 (enExample)
BR (1) BR112023026566A2 (enExample)
CA (1) CA3222300A1 (enExample)
CL (1) CL2023003725A1 (enExample)
CO (1) CO2023017378A2 (enExample)
IL (1) IL308072A (enExample)
MX (1) MX2023014666A (enExample)
TW (1) TW202317624A (enExample)
WO (2) WO2022262959A1 (enExample)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018054484A1 (en) * 2016-09-23 2018-03-29 Biontech Ag Bispecific trivalent antibodies binding to claudin 6 or claudin18.2 and cd3 for treatment of claudin expressing cancer diseases
AU2020379735A1 (en) 2019-11-05 2022-05-26 Regeneron Pharmaceuticals, Inc. N-terminal SCFV multispecific binding molecules
JP2026501506A (ja) * 2022-12-14 2026-01-16 アステラス・ファーマ・ヨーロッパ・ベスローデン・フェンノートシャップ Ｃｌｄｎ１８．２及びｃｄ３に結合する二重特異性結合剤並びに免疫チェックポイント阻害剤を含む併用療法
WO2025120866A1 (en) * 2023-12-08 2025-06-12 Astellas Pharma Inc. Combination therapy involving bispecific binding agents binding to cldn18.2 and cd3 and agents stabilizing or increasing expression of cldn18.2
AR134560A1 (es) * 2023-12-08 2026-01-28 Astellas Pharma Inc Terapia de combinación que implica agentes de unión biespecíficos que se unen a cldn18.2 y cd3 y agentes que estabilizan o aumentan la expresión de cldn18.2
WO2025120867A1 (en) * 2023-12-08 2025-06-12 Astellas Pharma Inc. Combination therapy involving bispecific binding agents binding to cldn18.2 and cd3 and anti-vegfr2 antibodies
CN120829517A (zh) * 2024-04-22 2025-10-24 鲁南新时代生物技术有限公司 抗cldn18.2/cd3双特异性抗体及用途
WO2026060339A1 (en) * 2024-09-16 2026-03-19 Merck Sharp & Dohme Llc Human claudin 18.2 binders and uses thereof
WO2026101943A1 (en) * 2024-11-06 2026-05-15 Agilent Technologies, Inc. Anti-human claudin-18.2 antibodies for in vitro diagnostics

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8601597D0 (en) 1986-01-23 1986-02-26 Wilson R H Nucleotide sequences
GB8717430D0 (en) 1987-07-23 1987-08-26 Celltech Ltd Recombinant dna product
GB8809129D0 (en) 1988-04-18 1988-05-18 Celltech Ltd Recombinant dna methods vectors and host cells
EP0590058B1 (en) 1991-06-14 2003-11-26 Genentech, Inc. HUMANIZED Heregulin ANTIBODy
GB9203459D0 (en) 1992-02-19 1992-04-08 Scotgen Ltd Antibodies with germ-line variable regions
US5731168A (en) 1995-03-01 1998-03-24 Genentech, Inc. Method for making heteromultimeric polypeptides
US7754208B2 (en) 2001-01-17 2010-07-13 Trubion Pharmaceuticals, Inc. Binding domain-immunoglobulin fusion proteins
US20030133939A1 (en) 2001-01-17 2003-07-17 Genecraft, Inc. Binding domain-immunoglobulin fusion proteins
KR100944575B1 (ko) 2002-10-17 2010-02-25 젠맵 에이/에스 Ｃｄ20에 대한 인간 모노클로날 항체
JP2007512846A (ja) 2003-12-04 2007-05-24 ゼンコー・インコーポレイテッド 増加した宿主ストリング含有量を有する変異体タンパク質の生成方法およびその組成物
EP1790664A1 (en) 2005-11-24 2007-05-30 Ganymed Pharmaceuticals AG Monoclonal antibodies against claudin-18 for treatment of cancer
US20090004213A1 (en) 2007-03-26 2009-01-01 Immatics Biotechnologies Gmbh Combination therapy using active immunotherapy
US9856320B2 (en) 2012-05-15 2018-01-02 Bristol-Myers Squibb Company Cancer immunotherapy by disrupting PD-1/PD-L1 signaling
KR102391731B1 (ko) 2013-01-14 2022-04-27 젠코어 인코포레이티드 신규한 이형이량체 단백질
JP6696982B2 (ja) * 2014-11-26 2020-05-20 ゼンコー・インコーポレイテッドＸｅｎｃｏｒ、 Ｉｎｃ． Ｃｄ３および腫瘍抗原に結合するヘテロ二量体抗体
WO2018054484A1 (en) * 2016-09-23 2018-03-29 Biontech Ag Bispecific trivalent antibodies binding to claudin 6 or claudin18.2 and cd3 for treatment of claudin expressing cancer diseases
CN111518214B (zh) * 2019-02-03 2023-09-22 上海健信生物医药科技有限公司 靶向cldn18.2的双特异性抗体及其制备方法和应用
BR112021002032A2 (pt) 2018-08-03 2021-07-20 Amgen Research (Munich) Gmbh construtos de anticorpos para cldn18.2 e cd3
WO2021237717A1 (zh) * 2020-05-29 2021-12-02 武汉友芝友生物制药有限公司 抗cldn18.2和cd3的双特异性抗体

Also Published As

Publication number Publication date
AU2022292895A1 (en) 2024-01-04
EP4355428A1 (en) 2024-04-24
US12378313B2 (en) 2025-08-05
JP2024116283A (ja) 2024-08-27
AR126154A1 (es) 2023-09-13
TW202317624A (zh) 2023-05-01
BR112023026566A2 (pt) 2024-03-05
CN117858906A (zh) 2024-04-09
US11739145B2 (en) 2023-08-29
CO2023017378A2 (es) 2024-02-05
US20260035458A1 (en) 2026-02-05
US20240018234A1 (en) 2024-01-18
WO2022262959A1 (en) 2022-12-22
CL2023003725A1 (es) 2024-05-17
MX2023014666A (es) 2024-01-12
JP7513854B2 (ja) 2024-07-09
WO2022263508A1 (en) 2022-12-22
KR20240032847A (ko) 2024-03-12
JP2024520868A (ja) 2024-05-24
IL308072A (en) 2023-12-01
US20230137677A1 (en) 2023-05-04

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