PL2438171T3 - Komórki z niedoborem fukozylacji - Google Patents

Komórki z niedoborem fukozylacji

Info

Publication number
PL2438171T3
PL2438171T3 PL10721096T PL10721096T PL2438171T3 PL 2438171 T3 PL2438171 T3 PL 2438171T3 PL 10721096 T PL10721096 T PL 10721096T PL 10721096 T PL10721096 T PL 10721096T PL 2438171 T3 PL2438171 T3 PL 2438171T3
Authority
PL
Poland
Prior art keywords
fucosylation
deficient cells
deficient
cells
Prior art date
Application number
PL10721096T
Other languages
English (en)
Polish (pl)
Inventor
Gang Chen
Darya Burakov
James P Fandl
Original Assignee
Regeneron Pharma
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 Regeneron Pharma filed Critical Regeneron Pharma
Publication of PL2438171T3 publication Critical patent/PL2438171T3/pl

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P21/00Preparation of peptides or proteins
    • C12P21/005Glycopeptides, glycoproteins
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N5/00Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
    • C12N5/10Cells modified by introduction of foreign genetic material
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K16/00Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K16/00Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/2863Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against receptors for growth factors, growth regulators
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K16/00Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • C07K16/18Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • C07K16/28Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants
    • C07K16/2866Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against receptors, cell surface antigens or cell surface determinants against receptors for cytokines, lymphokines, interferons
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09Recombinant DNA-technology
    • C12N15/11DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
    • C12N15/52Genes encoding for enzymes or proenzymes
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12NMICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N9/00Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
    • C12N9/0004Oxidoreductases (1.)
    • C12N9/0006Oxidoreductases (1.) acting on CH-OH groups as donors (1.1)
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P21/00Preparation of peptides or proteins
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12YENZYMES
    • C12Y101/00Oxidoreductases acting on the CH-OH group of donors (1.1)
    • C12Y101/01Oxidoreductases acting on the CH-OH group of donors (1.1) with NAD+ or NADP+ as acceptor (1.1.1)
    • C12Y101/01271GDP-L-fucose synthase (1.1.1.271)
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K2317/00Immunoglobulins specific features
    • C07K2317/10Immunoglobulins specific features characterized by their source of isolation or production
    • C07K2317/14Specific host cells or culture conditions, e.g. components, pH or temperature
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K2317/00Immunoglobulins specific features
    • C07K2317/40Immunoglobulins specific features characterized by post-translational modification
    • C07K2317/41Glycosylation, sialylation, or fucosylation
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/52Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Genetics & Genomics (AREA)
  • Engineering & Computer Science (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • General Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Molecular Biology (AREA)
  • Biotechnology (AREA)
  • Biomedical Technology (AREA)
  • Microbiology (AREA)
  • Biophysics (AREA)
  • Immunology (AREA)
  • Medicinal Chemistry (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Plant Pathology (AREA)
  • Cell Biology (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Peptides Or Proteins (AREA)
  • Enzymes And Modification Thereof (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
PL10721096T 2009-06-02 2010-06-01 Komórki z niedoborem fukozylacji PL2438171T3 (pl)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US18340009P 2009-06-02 2009-06-02
US34885810P 2010-05-27 2010-05-27
EP10721096.5A EP2438171B1 (en) 2009-06-02 2010-06-01 Fucosylation-deficient cells
PCT/US2010/036914 WO2010141478A1 (en) 2009-06-02 2010-06-01 Fucosylation-deficient cells

Publications (1)

Publication Number Publication Date
PL2438171T3 true PL2438171T3 (pl) 2015-04-30

Family

ID=42338231

Family Applications (3)

Application Number Title Priority Date Filing Date
PL10721096T PL2438171T3 (pl) 2009-06-02 2010-06-01 Komórki z niedoborem fukozylacji
PL17192430T PL3279326T3 (pl) 2009-06-02 2010-06-01 Komórki z deficytem fukozylacji
PL14179885T PL2808393T3 (pl) 2009-06-02 2010-06-01 Komórki z brakiem fukozylacji

Family Applications After (2)

Application Number Title Priority Date Filing Date
PL17192430T PL3279326T3 (pl) 2009-06-02 2010-06-01 Komórki z deficytem fukozylacji
PL14179885T PL2808393T3 (pl) 2009-06-02 2010-06-01 Komórki z brakiem fukozylacji

Country Status (16)

Country Link
US (8) US8409838B2 (enExample)
EP (3) EP2808393B1 (enExample)
JP (4) JP5744856B2 (enExample)
KR (2) KR101441437B1 (enExample)
CN (1) CN102459603B (enExample)
AU (1) AU2010256753B2 (enExample)
BR (1) BRPI1010035A2 (enExample)
CA (1) CA2764370C (enExample)
DK (3) DK2438171T3 (enExample)
ES (2) ES2661074T3 (enExample)
HU (1) HUE038596T2 (enExample)
IL (1) IL216624A (enExample)
PL (3) PL2438171T3 (enExample)
SG (1) SG176251A1 (enExample)
TW (1) TWI513818B (enExample)
WO (1) WO2010141478A1 (enExample)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140161782A1 (en) 2008-06-09 2014-06-12 Targazyme, Inc. Augmentation of cell therapy efficacy including treatment with alpha 1-3 fucoslytransferase
PL2438171T3 (pl) 2009-06-02 2015-04-30 Regeneron Pharma Komórki z niedoborem fukozylacji
AU2012226398B9 (en) 2011-03-06 2017-04-13 Merck Serono S.A. Low fucose cell lines and uses thereof
WO2013013013A2 (en) * 2011-07-21 2013-01-24 Alnylam Pharmaceuticals, Inc. Compositions and methods for producing modified glycoproteins
TW201823460A (zh) 2012-05-29 2018-07-01 美商再生元醫藥公司 生產細胞株增強子
EP2722673B1 (en) 2012-10-17 2017-07-12 Hexal AG Improved method of mapping glycans of glycoproteins
AR095196A1 (es) 2013-03-15 2015-09-30 Regeneron Pharma Medio de cultivo celular libre de suero
WO2015033343A1 (en) 2013-09-03 2015-03-12 Yissum Research Development Company Of The Hebrew University Of Jerusalem Ltd. Compositions and methods for expressing recombinant polypeptides
US20150093782A1 (en) * 2013-10-01 2015-04-02 The University Of Wyoming Compositions and methods for reducing fucosylation of glycoproteins in insect cells and methods of use thereof for production of recombinant glycoproteins
KR102399005B1 (ko) 2014-03-11 2022-05-17 리제너론 파마슈티칼스 인코포레이티드 항-egfrviii 항체 및 그것의 용도
CN106604930B (zh) * 2014-05-30 2021-10-29 新英格兰生物实验室公司 去糖基化试剂和方法
CN114540266A (zh) * 2014-07-07 2022-05-27 塔尔加泽梅股份有限公司 用于治疗用途的岩藻糖基化细胞的制备和冷冻干燥
CN105671109B (zh) * 2014-11-20 2019-08-23 中国人民解放军军事医学科学院生物工程研究所 用糖基工程酵母制备具有动物细胞糖基化修饰流感血凝素糖蛋白的方法
TWI710573B (zh) 2015-01-26 2020-11-21 美商再生元醫藥公司 抗伊波拉病毒醣蛋白之人類抗體
TW202440903A (zh) 2015-08-04 2024-10-16 美商再生元醫藥公司 補充牛磺酸之細胞培養基及用法(一)
MX2018004831A (es) * 2015-11-02 2018-08-01 Genentech Inc Metodos para confeccionar formas fucosiladas y afucosiladas de una proteina.
JP6674028B2 (ja) * 2016-01-06 2020-04-01 アウトルック セラピューティクス,インコーポレイティド モノクローナル抗体組成物中のアフコシル化種の調節
AU2017213775A1 (en) 2016-02-03 2018-08-16 Outlook Therapeutics, Inc. Buffer formulations for enhanced antibody stability
EP3445780A1 (en) 2016-04-20 2019-02-27 Regeneron Pharmaceuticals, Inc. Compositions and methods for making antibodies based on use of an expression-enhancing locus
TWI827531B (zh) * 2016-04-20 2024-01-01 美商再生元醫藥公司 基於使用增強表現基因座之製備抗體的組成物及方法
EP3339444A1 (en) * 2016-12-20 2018-06-27 Mabxience Research, S.L. Method for obtaining a glycoprotein with an increased percentage of afucosylated glycans
SG11202009216YA (en) 2018-03-26 2020-10-29 Amgen Inc Total afucosylated glycoforms of antibodies produced in cell culture
MY197429A (en) * 2018-08-29 2023-06-16 United Biopharma Inc Afucosylated antibodies and manufacture thereof
KR20210084488A (ko) 2018-10-29 2021-07-07 가부시키가이샤 멘에키세이부츠 켄큐죠 항hiv항체 및 그 제조 방법
US12297451B1 (en) 2019-10-25 2025-05-13 Regeneron Pharmaceuticals, Inc. Cell culture medium
JP2023527352A (ja) 2020-05-26 2023-06-28 リジェネロン・ファーマシューティカルズ・インコーポレイテッド 抗sars-cov-2-スパイク糖タンパク質抗体及び抗原結合断片
AU2021283349A1 (en) 2020-06-03 2023-02-02 Regeneron Pharmaceuticals, Inc. Methods for treating or preventing SARS-CoV-2 infections and COVID-19 with anti-SARS-CoV-2 spike glycoprotein antibodies
CN112843234B (zh) * 2021-01-20 2022-09-06 四川大学华西第二医院 一种调控生物机体内gdp-甘露糖的浓度的装置
TW202317614A (zh) 2021-06-07 2023-05-01 美商安進公司 使用岩藻糖苷酶控制糖基化蛋白的去岩藻糖基化水平
JP2024527235A (ja) 2021-06-22 2024-07-24 リジェネロン・ファーマシューティカルズ・インコーポレイテッド 抗EGFRvIII抗体薬物コンジュゲート及びその使用
BR112024000744A2 (pt) 2021-07-14 2024-04-30 Regeneron Pharma Anticorpos de glicoprotéina spike anti-sars-cov-2 e fragmentos de ligação a antígeno
WO2023081434A2 (en) 2021-11-07 2023-05-11 Regeneron Pharmaceuticals, Inc. Methods for treating or preventing sars-cov-2 infections and covid-19 with anti-sars-cov-2 spike glycoprotein antibodies
KR20240168482A (ko) 2022-03-02 2024-11-29 리제너론 파아마슈티컬스, 인크. 항체 생산을 위한 세포 배양 방법

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1006070A (en) 1909-05-11 1911-10-17 George Walter Durbrow Method of and means for extracting micro-organisms and solids from water.
CA2369292C (en) 1999-04-09 2010-09-21 Kyowa Hakko Kogyo Co. Ltd. Method of modulating the activity of functional immune molecules
JP2001145488A (ja) 1999-11-19 2001-05-29 Natl Inst Of Advanced Industrial Science & Technology Meti シロイヌナズナ由来のgdp−4−ケト−6−デオキシ−d−マンノース−3,5−エピメラーゼ−4−レダクターゼ遺伝子
FR2807767B1 (fr) 2000-04-12 2005-01-14 Lab Francais Du Fractionnement Anticorps monoclonaux anti-d
US6946292B2 (en) * 2000-10-06 2005-09-20 Kyowa Hakko Kogyo Co., Ltd. Cells producing antibody compositions with increased antibody dependent cytotoxic activity
EA013563B1 (ru) * 2000-10-06 2010-06-30 Киова Хакко Кирин Ко., Лтд. Трансгенное животное, продуцирующее антитела с измененными углеводными цепями, способ получения антител и содержащее антитела лекарственное средство
US20020150968A1 (en) 2001-01-10 2002-10-17 Wang Peng G. Glycoconjugate and sugar nucleotide synthesis using solid supports
US6919183B2 (en) 2001-01-16 2005-07-19 Regeneron Pharmaceuticals, Inc. Isolating cells expressing secreted proteins
ATE430580T1 (de) 2001-10-25 2009-05-15 Genentech Inc Glycoprotein-zusammensetzungen
KR100585140B1 (ko) 2004-04-26 2006-05-30 삼성전자주식회사 와이어 본딩 장치 및 이를 이용한 반도체 패키지의 와이어본딩 방법
US20060223147A1 (en) * 2004-08-05 2006-10-05 Kyowa Hakko Kogyo Co., Ltd., Process for producing glycoprotein composition
KR20080032065A (ko) 2005-06-03 2008-04-14 제넨테크, 인크. 푸코실화 수준이 조절된 항체의 생성 방법
ME01786B (me) 2006-08-14 2014-09-20 Xencor Inc Optimizovana antitela usmerena na cd19
JP2010519930A (ja) 2007-03-07 2010-06-10 グライコフィ, インコーポレイテッド 糖タンパク質の修飾フコシル化を用いる産生
WO2008151219A1 (en) 2007-06-04 2008-12-11 Regeneron Pharmaceuticals, Inc. Enhanced expression and stability regions
WO2010018847A1 (ja) 2008-08-13 2010-02-18 協和発酵キリン株式会社 遺伝子組換えプロテインs組成物
PL2438171T3 (pl) 2009-06-02 2015-04-30 Regeneron Pharma Komórki z niedoborem fukozylacji
AU2012226398B9 (en) 2011-03-06 2017-04-13 Merck Serono S.A. Low fucose cell lines and uses thereof

Also Published As

Publication number Publication date
CA2764370C (en) 2018-08-21
ES2527173T3 (es) 2015-01-21
US9206455B2 (en) 2015-12-08
PL2808393T3 (pl) 2018-04-30
DK2438171T3 (en) 2015-01-26
ES2661074T3 (es) 2018-03-27
US11560550B2 (en) 2023-01-24
US20170211115A1 (en) 2017-07-27
EP2438171B1 (en) 2014-12-17
WO2010141478A1 (en) 2010-12-09
JP2016104045A (ja) 2016-06-09
US20200080124A1 (en) 2020-03-12
US20160090410A1 (en) 2016-03-31
US8409838B2 (en) 2013-04-02
CN102459603B (zh) 2013-11-06
JP6211642B2 (ja) 2017-10-11
CN102459603A (zh) 2012-05-16
EP2438171A1 (en) 2012-04-11
US20190024129A1 (en) 2019-01-24
JP5744856B2 (ja) 2015-07-08
HUE038596T2 (hu) 2018-10-29
TW201107469A (en) 2011-03-01
IL216624A (en) 2015-02-26
IL216624A0 (en) 2012-02-29
PL3279326T3 (pl) 2021-03-08
EP3279326B1 (en) 2020-10-14
KR101441437B1 (ko) 2014-09-25
DK2808393T3 (en) 2018-03-12
JP2015051021A (ja) 2015-03-19
EP2808393A3 (en) 2015-03-11
AU2010256753B2 (en) 2013-11-28
KR101641526B1 (ko) 2016-07-21
TWI513818B (zh) 2015-12-21
US20100304436A1 (en) 2010-12-02
KR20120029443A (ko) 2012-03-26
US20130164786A1 (en) 2013-06-27
US10006070B2 (en) 2018-06-26
DK3279326T3 (da) 2020-12-21
JP2017006147A (ja) 2017-01-12
US20210254022A1 (en) 2021-08-19
AU2010256753A1 (en) 2012-01-12
CA2764370A1 (en) 2010-12-09
SG176251A1 (en) 2011-12-29
EP2808393B1 (en) 2018-01-10
HK1163745A1 (en) 2012-09-14
JP2012528594A (ja) 2012-11-15
EP3279326A1 (en) 2018-02-07
HK1249547A1 (en) 2018-11-02
US9550823B2 (en) 2017-01-24
US20230295583A1 (en) 2023-09-21
US12054751B2 (en) 2024-08-06
BRPI1010035A2 (pt) 2015-08-25
KR20140039340A (ko) 2014-04-01
EP2808393A2 (en) 2014-12-03
HK1198180A1 (en) 2015-03-13

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