CN106414552B - 制备用于细胞培养基中的泊洛沙姆的方法 - Google Patents

制备用于细胞培养基中的泊洛沙姆的方法 Download PDF

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Publication number
CN106414552B
CN106414552B CN201580026701.5A CN201580026701A CN106414552B CN 106414552 B CN106414552 B CN 106414552B CN 201580026701 A CN201580026701 A CN 201580026701A CN 106414552 B CN106414552 B CN 106414552B
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poloxamer
minutes
cell culture
cell
culture medium
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CN106414552A (zh
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G·P·维瑟维斯瓦兰
R·D·基斯
S·J·迈耶
I·权
K·卡尔霍恩
K·温彻斯特
A·亚当斯
M·格伦
S·凯尼格
A·德泽
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F Hoffmann La Roche AG
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/30Post-polymerisation treatment, e.g. recovery, purification, drying
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K1/00General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
    • C07K1/02General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length in solution
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07KPEPTIDES
    • C07K16/00Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/34Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/34Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
    • C08G65/48Polymers modified by chemical after-treatment
    • 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
    • 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
    • C12N5/0018Culture media for cell or tissue culture
    • 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
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2650/00Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G2650/28Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type
    • C08G2650/50Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type containing nitrogen, e.g. polyetheramines or Jeffamines(r)
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2650/00Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G2650/28Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule characterised by the polymer type
    • C08G2650/58Ethylene oxide or propylene oxide copolymers, e.g. pluronics
    • 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
    • C12N2500/00Specific components of cell culture medium
    • C12N2500/50Soluble polymers, e.g. polyethyleneglycol [PEG]

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Biotechnology (AREA)
  • Genetics & Genomics (AREA)
  • Wood Science & Technology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Zoology (AREA)
  • Medicinal Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polymers & Plastics (AREA)
  • Microbiology (AREA)
  • Cell Biology (AREA)
  • General Engineering & Computer Science (AREA)
  • Proteomics, Peptides & Aminoacids (AREA)
  • Biophysics (AREA)
  • Molecular Biology (AREA)
  • Immunology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Peptides Or Proteins (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
CN201580026701.5A 2014-03-25 2015-03-25 制备用于细胞培养基中的泊洛沙姆的方法 Active CN106414552B (zh)

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US201461970281P 2014-03-25 2014-03-25
US61/970,281 2014-03-25
PCT/US2015/022592 WO2015148736A1 (en) 2014-03-25 2015-03-25 Methods of preparing a poloxamer for use in cell culture medium

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CN106414552B (zh) 2014-03-25 2020-08-25 豪夫迈·罗氏有限公司 制备用于细胞培养基中的泊洛沙姆的方法
JP7037495B2 (ja) * 2016-03-17 2022-03-16 メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツング ポロキサマーを精製するための方法
KR102544922B1 (ko) * 2017-12-21 2023-06-16 시그마-알드리치 컴퍼니., 엘엘씨 폴록사머 조성물 및 이의 제조 및 사용 방법
RU2741710C1 (ru) * 2018-07-12 2021-01-28 Елена Валентиновна Аршинцева Термический способ стерилизации жидких лекарственных средств, содержащих в своем составе полоксамер
JPWO2020022511A1 (ja) * 2018-07-27 2021-08-02 味の素株式会社 動物細胞の浮遊培養用の添加物、浮遊培養用培地および浮遊培養方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004071452A2 (en) * 2003-02-12 2004-08-26 Ceremed, Inc. Random and non-random alkylene oxide polymer alloy compositions
EP1661558A1 (en) * 2004-11-30 2006-05-31 Basf Aktiengesellschaft Compositions based on micro-prilled poloxamer particles and methods for their manufacturing
CN101910408A (zh) * 2007-12-27 2010-12-08 巴克斯特国际公司 细胞培养方法

Family Cites Families (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE266710C (enExample)
USRE30985E (en) 1978-01-01 1982-06-29 Serum-free cell culture media
US4560655A (en) 1982-12-16 1985-12-24 Immunex Corporation Serum-free cell culture medium and process for making same
US4657866A (en) 1982-12-21 1987-04-14 Sudhir Kumar Serum-free, synthetic, completely chemically defined tissue culture media
US4816567A (en) 1983-04-08 1989-03-28 Genentech, Inc. Recombinant immunoglobin preparations
DD266710A3 (de) 1983-06-06 1989-04-12 Ve Forschungszentrum Biotechnologie Verfahren zur biotechnischen Herstellung van alkalischer Phosphatase
US4767704A (en) 1983-10-07 1988-08-30 Columbia University In The City Of New York Protein-free culture medium
US4879231A (en) 1984-10-30 1989-11-07 Phillips Petroleum Company Transformation of yeasts of the genus pichia
GB8516415D0 (en) 1985-06-28 1985-07-31 Celltech Ltd Culture of animal cells
US4927762A (en) 1986-04-01 1990-05-22 Cell Enterprises, Inc. Cell culture medium with antioxidant
GB8610600D0 (en) 1986-04-30 1986-06-04 Novo Industri As Transformation of trichoderma
AU632065B2 (en) * 1988-09-23 1992-12-17 Novartis Vaccines And Diagnostics, Inc. Cell culture medium for enhanced cell growth, culture longevity and product expression
GB8823869D0 (en) 1988-10-12 1988-11-16 Medical Res Council Production of antibodies
FR2646437B1 (fr) 1989-04-28 1991-08-30 Transgene Sa Nouvelles sequences d'adn, leur application en tant que sequence codant pour un peptide signal pour la secretion de proteines matures par des levures recombinantes, cassettes d'expression, levures transformees et procede de preparation de proteines correspondant
EP0402226A1 (en) 1989-06-06 1990-12-12 Institut National De La Recherche Agronomique Transformation vectors for yeast yarrowia
US5959177A (en) 1989-10-27 1999-09-28 The Scripps Research Institute Transgenic plants expressing assembled secretory antibodies
CA2050918A1 (en) 1990-01-12 1991-07-13 Raju Kucherlapati Generation of xenogeneic antibodies
WO1996033735A1 (en) 1995-04-27 1996-10-31 Abgenix, Inc. Human antibodies derived from immunized xenomice
DE69133476T2 (de) 1990-08-29 2006-01-05 GenPharm International, Inc., Palo Alto Transgene Mäuse fähig zur Produktion heterologer Antikörper
US5661016A (en) 1990-08-29 1997-08-26 Genpharm International Inc. Transgenic non-human animals capable of producing heterologous antibodies of various isotypes
US5633425A (en) 1990-08-29 1997-05-27 Genpharm International, Inc. Transgenic non-human animals capable of producing heterologous antibodies
US5625126A (en) 1990-08-29 1997-04-29 Genpharm International, Inc. Transgenic non-human animals for producing heterologous antibodies
US5545806A (en) 1990-08-29 1996-08-13 Genpharm International, Inc. Ransgenic non-human animals for producing heterologous antibodies
US5122469A (en) 1990-10-03 1992-06-16 Genentech, Inc. Method for culturing Chinese hamster ovary cells to improve production of recombinant proteins
FI941538A7 (fi) 1991-10-04 1994-05-31 Gs Dev Ab Partikkelit, menetelmä niiden valmistamiseksi ja niiden käyttö
DK0754050T3 (da) * 1994-01-14 2002-10-21 Xoma Technology Ltd Anti-gram-positive bakterielle fremgangsmåder og materialer
US5912228A (en) * 1995-01-13 1999-06-15 Xoma Corporation Therapeutic compositions comprising bactericidal/permeability-increasing (BPI) protein products
CA2219486A1 (en) 1995-04-28 1996-10-31 Abgenix, Inc. Human antibodies derived from immunized xenomice
DK1500329T3 (da) 1996-12-03 2012-07-09 Amgen Fremont Inc Humane antistoffer, der specifikt binder TNF-alfa
GB9625175D0 (en) * 1996-12-04 1997-01-22 Medi Cult As Serum-free cell culture media
US5804420A (en) 1997-04-18 1998-09-08 Bayer Corporation Preparation of recombinant Factor VIII in a protein free medium
US6040498A (en) 1998-08-11 2000-03-21 North Caroline State University Genetically engineered duckweed
ES2248127T3 (es) 1999-10-04 2006-03-16 Medicago Inc. Metodo para regular la transcripcion de genes foraneos en presencia de nigtrogeno.
US7125978B1 (en) 1999-10-04 2006-10-24 Medicago Inc. Promoter for regulating expression of foreign genes
US8802116B2 (en) * 2003-02-27 2014-08-12 Novasel Australia Pty. Ltd. Poloxamer emulsion preparations
AU2003900887A0 (en) * 2003-02-27 2003-03-13 Novasel Australia Pty Ltd Poloxamer emulsion preparations
WO2005014163A1 (en) 2003-08-04 2005-02-17 Camurus Ab Method for loading amphiphile particles with active agents
WO2005053652A1 (en) 2003-12-04 2005-06-16 Pfizer Products Inc. Multiparticulate crystalline drug compositions containing a poloxamer and a glyceride
WO2006044738A2 (en) 2004-10-18 2006-04-27 Maroon Biotech Corporation Methods and compositions for treatment of free radical injury
CN1939534B (zh) * 2005-09-27 2010-12-01 长春金赛药业股份有限公司 含有人生长激素或人粒细胞巨噬细胞刺激因子的用于治疗损伤和溃疡的外用制剂
EP2054040B1 (en) * 2006-08-16 2011-03-30 Novartis AG Method for making solid dispersions of midostaurin
KR100932613B1 (ko) 2007-04-27 2009-12-17 한남대학교 산학협력단 고분자 용융공정을 이용한 약물전달용 생체적합성 고분자나노 미립구의 제조방법 및 그 나노 미립구
WO2009055312A1 (en) * 2007-10-22 2009-04-30 Dfb Pharmaceuticals, Inc. Process for producing a poloxamer gel
MX2012007117A (es) * 2009-12-23 2012-07-23 Sanofi Pasteur Metodo para cultivar celulas adherentes.
JP6177873B2 (ja) * 2012-03-30 2017-08-09 アンスティチュ ナショナル ドゥ ラ サンテ エ ドゥ ラ ルシェルシュ メディカル ミクロスフィア組成物、その調製方法及び用途
CN106414552B (zh) * 2014-03-25 2020-08-25 豪夫迈·罗氏有限公司 制备用于细胞培养基中的泊洛沙姆的方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004071452A2 (en) * 2003-02-12 2004-08-26 Ceremed, Inc. Random and non-random alkylene oxide polymer alloy compositions
EP1661558A1 (en) * 2004-11-30 2006-05-31 Basf Aktiengesellschaft Compositions based on micro-prilled poloxamer particles and methods for their manufacturing
CN101910408A (zh) * 2007-12-27 2010-12-08 巴克斯特国际公司 细胞培养方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Enhanced anti-tumor activity and alleviated hepatotoxicity of clotrimazole-loaded suppository using poloxamer-propylene glycol gel";Chul Soon Yong et al;《International Journal of Pharmaceutics》;20060914;第321卷(第1-2期);第56-61页 *

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JP2023011566A (ja) 2023-01-24
IL247902A0 (en) 2016-11-30
CA2943357C (en) 2023-06-27
RU2016141568A3 (enExample) 2018-09-26
AU2015236008A1 (en) 2016-10-27
BR112016021739B1 (pt) 2021-11-03
JP2017516459A (ja) 2017-06-22
ES2778680T3 (es) 2020-08-11
CA2943357A1 (en) 2015-10-01
SI3122799T1 (sl) 2020-06-30
ZA201606711B (en) 2019-12-18
MX2021001981A (es) 2021-04-28
RU2016141568A (ru) 2018-04-28
KR20160138161A (ko) 2016-12-02
US11034793B2 (en) 2021-06-15
JP7472222B2 (ja) 2024-04-22
EP3778702B1 (en) 2023-06-28
JP6655548B2 (ja) 2020-02-26
CN111808276A (zh) 2020-10-23
AU2015236008B2 (en) 2018-12-20
US20170009015A1 (en) 2017-01-12
US20210371587A1 (en) 2021-12-02
EP3778702A1 (en) 2021-02-17
EP3122799B1 (en) 2020-01-15
JP2020103290A (ja) 2020-07-09
BR112016021739A2 (pt) 2017-08-15
WO2015148736A1 (en) 2015-10-01
EP3122799A1 (en) 2017-02-01
IL279583A (en) 2021-03-01
US11912823B2 (en) 2024-02-27
NZ725151A (en) 2021-05-28
SG11201607929PA (en) 2016-10-28
CN106414552A (zh) 2017-02-15
PL3122799T3 (pl) 2020-06-29
WO2015148736A8 (en) 2016-08-18
HRP20200372T1 (hr) 2020-06-12
IL279583B (en) 2022-03-01
KR102352250B1 (ko) 2022-01-17
IL247902B (en) 2021-01-31
EP3122799B8 (en) 2020-03-11
RU2710551C2 (ru) 2019-12-27
MY178060A (en) 2020-09-30

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