JP7445332B2 - ベバシズマブ精製の最適化された方法 - Google Patents
ベバシズマブ精製の最適化された方法 Download PDFInfo
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- JP7445332B2 JP7445332B2 JP2022550874A JP2022550874A JP7445332B2 JP 7445332 B2 JP7445332 B2 JP 7445332B2 JP 2022550874 A JP2022550874 A JP 2022550874A JP 2022550874 A JP2022550874 A JP 2022550874A JP 7445332 B2 JP7445332 B2 JP 7445332B2
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- 229960000397 bevacizumab Drugs 0.000 title claims description 11
- 238000000746 purification Methods 0.000 title description 32
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 78
- 102000004169 proteins and genes Human genes 0.000 claims description 71
- 108090000623 proteins and genes Proteins 0.000 claims description 71
- 239000000872 buffer Substances 0.000 claims description 56
- 229910019142 PO4 Inorganic materials 0.000 claims description 50
- 239000010452 phosphate Substances 0.000 claims description 50
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 49
- 238000010828 elution Methods 0.000 claims description 43
- 239000011780 sodium chloride Substances 0.000 claims description 39
- 238000005406 washing Methods 0.000 claims description 38
- 238000005341 cation exchange Methods 0.000 claims description 26
- 239000011534 wash buffer Substances 0.000 claims description 23
- 239000000706 filtrate Substances 0.000 claims description 14
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- 238000013060 ultrafiltration and diafiltration Methods 0.000 claims description 11
- 239000012149 elution buffer Substances 0.000 claims description 9
- 238000005349 anion exchange Methods 0.000 claims description 8
- 238000011091 antibody purification Methods 0.000 claims description 7
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 4
- 125000000524 functional group Chemical group 0.000 claims description 2
- 235000018102 proteins Nutrition 0.000 description 69
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- 239000000203 mixture Substances 0.000 description 10
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 9
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- 239000001488 sodium phosphate Substances 0.000 description 6
- 229910000162 sodium phosphate Inorganic materials 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 6
- 230000002378 acidificating effect Effects 0.000 description 5
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- 150000001768 cations Chemical class 0.000 description 5
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- -1 15mM to 30mM Chemical compound 0.000 description 4
- 229940024606 amino acid Drugs 0.000 description 4
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- IVLXQGJVBGMLRR-UHFFFAOYSA-N 2-aminoacetic acid;hydron;chloride Chemical compound Cl.NCC(O)=O IVLXQGJVBGMLRR-UHFFFAOYSA-N 0.000 description 3
- 102000008394 Immunoglobulin Fragments Human genes 0.000 description 3
- 108010021625 Immunoglobulin Fragments Proteins 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
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- 230000000717 retained effect Effects 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- QKNYBSVHEMOAJP-UHFFFAOYSA-N 2-amino-2-(hydroxymethyl)propane-1,3-diol;hydron;chloride Chemical compound Cl.OCC(N)(CO)CO QKNYBSVHEMOAJP-UHFFFAOYSA-N 0.000 description 2
- FFEARJCKVFRZRR-BYPYZUCNSA-N L-methionine Chemical compound CSCC[C@H](N)C(O)=O FFEARJCKVFRZRR-BYPYZUCNSA-N 0.000 description 2
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 2
- 229920002684 Sepharose Polymers 0.000 description 2
- 102000009524 Vascular Endothelial Growth Factor A Human genes 0.000 description 2
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- 230000002776 aggregation Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 150000001412 amines Chemical group 0.000 description 2
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- 229940120638 avastin Drugs 0.000 description 2
- 230000004071 biological effect Effects 0.000 description 2
- 229960000074 biopharmaceutical Drugs 0.000 description 2
- 125000002057 carboxymethyl group Chemical group [H]OC(=O)C([H])([H])[*] 0.000 description 2
- 230000008859 change Effects 0.000 description 2
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- 230000007935 neutral effect Effects 0.000 description 2
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- 239000000057 synthetic resin Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 230000001225 therapeutic effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 125000000022 2-aminoethyl group Chemical group [H]C([*])([H])C([H])([H])N([H])[H] 0.000 description 1
- ODHCTXKNWHHXJC-VKHMYHEASA-N 5-oxo-L-proline Chemical compound OC(=O)[C@@H]1CCC(=O)N1 ODHCTXKNWHHXJC-VKHMYHEASA-N 0.000 description 1
- DCXYFEDJOCDNAF-UHFFFAOYSA-N Asparagine Natural products OC(=O)C(N)CC(N)=O DCXYFEDJOCDNAF-UHFFFAOYSA-N 0.000 description 1
- 241000699802 Cricetulus griseus Species 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- DCXYFEDJOCDNAF-REOHCLBHSA-N L-asparagine Chemical compound OC(=O)[C@@H](N)CC(N)=O DCXYFEDJOCDNAF-REOHCLBHSA-N 0.000 description 1
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 description 1
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 238000001042 affinity chromatography Methods 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 229940124691 antibody therapeutics Drugs 0.000 description 1
- 210000000628 antibody-producing cell Anatomy 0.000 description 1
- 229960001230 asparagine Drugs 0.000 description 1
- 235000009582 asparagine Nutrition 0.000 description 1
- 229940009098 aspartate Drugs 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000013406 biomanufacturing process Methods 0.000 description 1
- OWMVSZAMULFTJU-UHFFFAOYSA-N bis-tris Chemical compound OCCN(CCO)C(CO)(CO)CO OWMVSZAMULFTJU-UHFFFAOYSA-N 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000006172 buffering agent Substances 0.000 description 1
- 150000007942 carboxylates Chemical class 0.000 description 1
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- 125000002091 cationic group Chemical group 0.000 description 1
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- 238000011143 downstream manufacturing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 229930195712 glutamate Natural products 0.000 description 1
- WHUUTDBJXJRKMK-VKHMYHEASA-L glutamate group Chemical group N[C@@H](CCC(=O)[O-])C(=O)[O-] WHUUTDBJXJRKMK-VKHMYHEASA-L 0.000 description 1
- 239000003102 growth factor Substances 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 210000000987 immune system Anatomy 0.000 description 1
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- 210000002751 lymph Anatomy 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000006174 pH buffer Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000008055 phosphate buffer solution Substances 0.000 description 1
- 230000001766 physiological effect Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 102000040430 polynucleotide Human genes 0.000 description 1
- 108091033319 polynucleotide Proteins 0.000 description 1
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- 239000011148 porous material Substances 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
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- 239000012562 protein A resin Substances 0.000 description 1
- 230000017854 proteolysis Effects 0.000 description 1
- 239000012521 purified sample Substances 0.000 description 1
- 229940043131 pyroglutamate Drugs 0.000 description 1
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- 230000002000 scavenging effect Effects 0.000 description 1
- 238000003998 size exclusion chromatography high performance liquid chromatography Methods 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000012064 sodium phosphate buffer Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/14—Extraction; Separation; Purification
- C07K1/16—Extraction; Separation; Purification by chromatography
- C07K1/18—Ion-exchange chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/10—Selective adsorption, e.g. chromatography characterised by constructional or operational features
- B01D15/16—Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the conditioning of the fluid carrier
- B01D15/166—Fluid composition conditioning, e.g. gradient
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/10—Selective adsorption, e.g. chromatography characterised by constructional or operational features
- B01D15/20—Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the conditioning of the sorbent material
- B01D15/203—Equilibration or regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/26—Selective adsorption, e.g. chromatography characterised by the separation mechanism
- B01D15/36—Selective adsorption, e.g. chromatography characterised by the separation mechanism involving ionic interaction, e.g. ion-exchange, ion-pair, ion-suppression or ion-exclusion
- B01D15/361—Ion-exchange
- B01D15/362—Cation-exchange
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/26—Selective adsorption, e.g. chromatography characterised by the separation mechanism
- B01D15/36—Selective adsorption, e.g. chromatography characterised by the separation mechanism involving ionic interaction, e.g. ion-exchange, ion-pair, ion-suppression or ion-exclusion
- B01D15/361—Ion-exchange
- B01D15/363—Anion-exchange
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/26—Selective adsorption, e.g. chromatography characterised by the separation mechanism
- B01D15/38—Selective adsorption, e.g. chromatography characterised by the separation mechanism involving specific interaction not covered by one or more of groups B01D15/265 and B01D15/30 - B01D15/36, e.g. affinity, ligand exchange or chiral chromatography
- B01D15/3804—Affinity chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/26—Selective adsorption, e.g. chromatography characterised by the separation mechanism
- B01D15/38—Selective adsorption, e.g. chromatography characterised by the separation mechanism involving specific interaction not covered by one or more of groups B01D15/265 and B01D15/30 - B01D15/36, e.g. affinity, ligand exchange or chiral chromatography
- B01D15/3804—Affinity chromatography
- B01D15/3809—Affinity chromatography of the antigen-antibody type, e.g. protein A, G or L chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
- B01D15/08—Selective adsorption, e.g. chromatography
- B01D15/42—Selective adsorption, e.g. chromatography characterised by the development mode, e.g. by displacement or by elution
- B01D15/424—Elution mode
- B01D15/426—Specific type of solvent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/14—Extraction; Separation; Purification
- C07K1/34—Extraction; Separation; Purification by filtration, ultrafiltration or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/06—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies from serum
- C07K16/065—Purification, fragmentation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/22—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against growth factors ; against growth regulators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2311/00—Details relating to membrane separation process operations and control
- B01D2311/26—Further operations combined with membrane separation processes
- B01D2311/2623—Ion-Exchange
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2315/00—Details relating to the membrane module operation
- B01D2315/16—Diafiltration
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Biophysics (AREA)
- General Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Medicinal Chemistry (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Peptides Or Proteins (AREA)
Description
前記洗浄緩衝液で洗浄する段階は、
1)0mM~38mM塩化ナトリウムを含むpH5.5~7.0の10mM~50mMリン酸塩を含む、緩衝液で抗体を洗浄する段階;を含み、
前記溶出緩衝液で溶出させる段階は、
1)38mM~50mM塩化ナトリウムを含むpH6.0~7.0の10mM~50mMのリン酸塩を含む、緩衝液で抗体を第1溶出させる段階;および
2)50mM~60mM塩化ナトリウムを含むpH6.0~7.0の10mM~50mMのリン酸塩を含む、緩衝液で抗体を第2溶出させる段階;を含む、抗体の精製方法を提供することにある。
前記洗浄緩衝液で洗浄する段階は、
1)0mM~38mM塩化ナトリウムを含む10mM~50mMリン酸塩(好ましくは、リン酸ナトリウム)(pH5.5~7.0)を含む、緩衝液で抗体を洗浄する段階; を含み、
前記溶出緩衝液で溶出させる段階は、
1)38mM~50mM塩化ナトリウムを含む10mM~50mMのリン酸塩(好ましくは、リン酸ナトリウム)(pH6.0~7.0)を含む、緩衝液で抗体を第1溶出させる段階;および
2)50mM~60mM塩化ナトリウムを含む10mM~50mMのリン酸塩(好ましくは、リン酸ナトリウム)(pH6.0~7.0)を含む、緩衝液で抗体を第2溶出させる段階;を含む、抗体の精製方法を提供する。
1)0mM~38mM塩化ナトリウムを含む10mM~50mMリン酸塩(pH5.5~7.0)を含む、緩衝液で抗体を洗浄する段階。
a)塩化ナトリウムを含まずに、10mM~50mMリン酸塩(pH5.5~7.0)を含む洗浄緩衝液で第1次洗浄する段階;
b)塩化ナトリウムを含まずに、10mM~50mMリン酸塩(pH6.0~7.0)を含む洗浄緩衝液で第2次洗浄する段階;および
c)20~38mMの塩化ナトリウムを含む10mM~50mMリン酸塩(pH6.0~7.0)を含む洗浄緩衝液で第3次洗浄する段階。
1)38mM~50mM塩化ナトリウムを含む10mM~50mMのリン酸塩(pH6.0~7.0)を含む、緩衝液で抗体を第1溶出させる段階;および
2)50mM~60mM塩化ナトリウムを含む10mM~50mMのリン酸塩(pH6.0~7.0)を含む、緩衝液で抗体を第2溶出させる段階。
(i)10mM~50mMのリン酸塩(pH5.5~7.0)を含む、平衡緩衝液で平衡化されたフラクトゲル(Fractogel)TM EMD SO3カラムに、抗体の混合液を含む試料をローディングする段階;
(ii)0mM~38mM塩化ナトリウムを含む10mM~50mMのリン酸塩(pH5.5~7.0)を含む、緩衝液で洗浄する段階;
(iii)38mM~50mM塩化ナトリウムを含む10mM~50mMのリン酸塩(pH6.0~7.0)を含む、緩衝液で抗体を第1溶出させる段階;および
(iv)50mM~60mM塩化ナトリウムを含む10mM~50mMのリン酸塩(pH6.0~7.0)を含む、緩衝液で抗体を第2溶出させる段階;を含んでもよい。
a)塩化ナトリウムを含まずに、10mM~50mMリン酸塩(pH5.5~7.0)を含む洗浄緩衝液で第1次洗浄する段階;
b)塩化ナトリウムを含まずに、10mM~50mMリン酸塩(pH6.0~7.0)を含む洗浄緩衝液で第2次洗浄する段階;および
c)20~38mMの塩化ナトリウムを含む10mM~50mMリン酸塩(pH6.0~7.0)を含む洗浄緩衝液で第3次洗浄する段階;で構成される。
前記溶出を通じて回収したろ液を限外ろ過および透析ろ過する段階;および
多層ろ過フィルターに通過させてろ液を回収する段階;を含んでもよい。
ベバシズマブ(Bevacizumab)抗体を発現させる組換えCHO細胞を培養して、ベバシズマブ抗体を発現させた。本発明の実施例によるベバシズマブ抗体は、抗体力価を2~3のレベルで有することを確認し、これを本発明の実験に使用した。
本実施例では、フラクトゲル(fractogel)TM EMD SO3カラムを陽イオン交換カラムとして使用し、その過程は、下記の通りである。
前記実施例1による伝導度によって製造された前処理されたベバシズマブ試料を実施例2の条件で陽イオン交換クロマトグラフィーを行うことで、段階収率およびCharge variant含有量の変化を確認した。
前記実施例2の条件下に伝導度7.0mS/cmを有する下記の試料に対する陽イオン交換クロマトグラフィーを行った。
前記実施例2による陽イオン交換クロマトグラフィーを行った溶出液に1M glycine-HCl(pH3.0)緩衝液を添加して、pH3.8で1時間の間ウイルス不活性化をさせた。不活性化が完了した後、0.2μmフィルターを通過させてろ過した後、試料のpHは、1M Tris-HCl(pH9.0)緩衝液を添加して試料のpHを6.0に調整した。
試料量を考慮して限外ろ過および透析ろ過(UF/DF1)工程は、micro-centricon(0.5mL)を使用し、各条件別に3反復(Triplicate)で行った。
多層ろ過フィルターは、静電気的性質などによって、宿主由来DNA(HCD)、宿主由来タンパク質(HCP)などを減少させることができる。これによって、XOHC形態の多層ろ過フィルターを準備し、3次精製水および20mM Sodium Phosphate(pH6.0)緩衝液を流して置換して平衡化した。次に、ウイルス不活性化させた後、ろ過工程を経た実施例6の試料を20mM Sodium Phosphate(pH6.0)緩衝液で置換した後、多層ろ過フィルターに流して100LMH(Liter/m2/hour)の流速でろ過した。ろ過が完了した試料を全部回収して、下記陰イオン交換カラムクロマトグラフィー精製のための試料として使用した。
陰イオン交換カラムは、等電点以上で陰イオンを帯びるタンパク質を吸着させるので、等電点が7以上である抗体の場合(ベバシズマブの場合、等電点が8.3)、中性pHの緩衝液を使用する場合、本抗体は、陰イオン交換樹脂に付着せずに、通過液(flow-through)として排出される。これによって、本発明の製造工程に適した陰イオン交換樹脂および緩衝液条件を糾明するために、下記のような実験を行った。
Claims (7)
- 等電点が7~10の抗体および一つ以上の宿主細胞タンパク質(host cell protein,HCP)を含むpH5.5~7.0および伝導度7mS/cm~8mS/cmの試料を、平衡化された陽イオン交換カラムにローディングし、陽イオン交換カラムを洗浄緩衝液で洗浄した後、カラムに結合した抗体を溶出緩衝液で溶出させる段階を含む抗体の精製方法であって、
前記陽イオン交換カラムの官能基はスルホナート(S)であり、
前記洗浄緩衝液で洗浄する段階は、0mM~38mM塩化ナトリウムを含むpH5.5~7.0の10mM~50mMリン酸塩を含む、緩衝液で抗体を洗浄する段階;を含み、
前記溶出緩衝液で溶出させる段階は、
1)38mM~50mM塩化ナトリウムを含むpH6.0~7.0の10mM~50mMのリン酸塩を含む、10~20カラム体積の緩衝液で抗体を第1溶出させる段階;および
2)50mM~60mM塩化ナトリウムを含むpH6.0~7.0の10mM~50mMのリン酸塩を含む、5~12カラム体積の緩衝液で抗体を第2溶出させる段階;を含む、抗体の精製方法。 - 0mM~38mM塩化ナトリウムを含むpH5.5~7.0の10mM~50mMリン酸塩を含む、緩衝液で抗体を洗浄する段階は、下記の3段階を含む、請求項1に記載の方法:
a)塩化ナトリウムを含まずに、pH5.5~7.0の10mM~50mMリン酸塩を含む洗浄緩衝液で第1次洗浄する段階;
b)塩化ナトリウムを含まずに、pH5.5~7.0の10mM~50mMリン酸塩を含む洗浄緩衝液で第2次洗浄する段階;および
c)20~38mMの塩化ナトリウムを含むpH6.0~7.0の10mM~50mMリン酸塩を含む洗浄緩衝液で第3次洗浄する段階。 - 前記抗体は、ベバシズマブ(Bevacizumab)である、請求項1に記載の方法。
- 前記陽イオン交換カラムは、フラクトゲル(Fractogel)TM EMD SO3である、請求項1に記載の方法。
- 前記抗体はベバシズマブ(Bevacizumab)であり、前記陽イオン交換カラムはフラクトゲル(Fractogel) TM EMD SO 3 である、請求項1に記載の方法。
- 抗体の精製方法は、
前記溶出させる段階を通じて回収したろ液を限外ろ過および透析ろ過する段階;および多層ろ過フィルターに通過させてろ液を回収する段階;をさらに含む、請求項1に記載の方法。 - 抗体の精製方法は、多層ろ過フィルターに通過させてろ液を回収する段階後に陰イオン交換カラムを用いて宿主細胞タンパク質を除去する段階をさらに含む、請求項6に記載の方法。
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