JP4999677B2 - ハムスターigf−1を用いたタンパク質の製造方法 - Google Patents
ハムスターigf−1を用いたタンパク質の製造方法 Download PDFInfo
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- JP4999677B2 JP4999677B2 JP2007503780A JP2007503780A JP4999677B2 JP 4999677 B2 JP4999677 B2 JP 4999677B2 JP 2007503780 A JP2007503780 A JP 2007503780A JP 2007503780 A JP2007503780 A JP 2007503780A JP 4999677 B2 JP4999677 B2 JP 4999677B2
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- CDAISMWEOUEBRE-UHFFFAOYSA-N scyllo-inosotol Natural products OC1C(O)C(O)C(O)C(O)C1O CDAISMWEOUEBRE-UHFFFAOYSA-N 0.000 description 1
- 239000012090 serum-supplement Substances 0.000 description 1
- 238000002741 site-directed mutagenesis Methods 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- AJPJDKMHJJGVTQ-UHFFFAOYSA-M sodium dihydrogen phosphate Chemical compound [Na+].OP(O)([O-])=O AJPJDKMHJJGVTQ-UHFFFAOYSA-M 0.000 description 1
- 239000011655 sodium selenate Substances 0.000 description 1
- 235000018716 sodium selenate Nutrition 0.000 description 1
- 229960001881 sodium selenate Drugs 0.000 description 1
- 239000011781 sodium selenite Substances 0.000 description 1
- 235000015921 sodium selenite Nutrition 0.000 description 1
- 229960001471 sodium selenite Drugs 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 210000004989 spleen cell Anatomy 0.000 description 1
- 210000000130 stem cell Anatomy 0.000 description 1
- 229960005322 streptomycin Drugs 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229960002180 tetracycline Drugs 0.000 description 1
- 229930101283 tetracycline Natural products 0.000 description 1
- 235000019364 tetracycline Nutrition 0.000 description 1
- 150000003522 tetracyclines Chemical class 0.000 description 1
- 229940126622 therapeutic monoclonal antibody Drugs 0.000 description 1
- 229960004072 thrombin Drugs 0.000 description 1
- 229940104230 thymidine Drugs 0.000 description 1
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000010474 transient expression Effects 0.000 description 1
- 229960001727 tretinoin Drugs 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- 239000012588 trypsin Substances 0.000 description 1
- 238000005199 ultracentrifugation Methods 0.000 description 1
- 241000701447 unidentified baculovirus Species 0.000 description 1
- DRTQHJPVMGBUCF-UHFFFAOYSA-N uracil arabinoside Natural products OC1C(O)C(CO)OC1N1C(=O)NC(=O)C=C1 DRTQHJPVMGBUCF-UHFFFAOYSA-N 0.000 description 1
- 229940045145 uridine Drugs 0.000 description 1
- 229960005356 urokinase Drugs 0.000 description 1
- 229960004295 valine Drugs 0.000 description 1
- 108700026220 vif Genes Proteins 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 235000021247 β-casein Nutrition 0.000 description 1
Classifications
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Description
1.(1)配列番号1に記載のアミノ酸配列を有するポリペプチド、及び
(2)配列番号1に記載のアミノ酸配列において、3番目のアミノ酸が他のアミノ酸に置換されたアミノ酸配列を有し、かつインスリン様成長因子1(IGF-1)活性を有するポリペプチド、
からなる群より選択されるポリペプチド。
2.3番目のアミノ酸がセリンに置換されている前記1記載のポリペプチド。
3.3番目のアミノ酸がリジンに置換されている前記1記載のポリペプチド。
4.前記1記載のポリペプチドをコードするDNA。
5.前記4記載のDNAを含むベクター。
6.前記5記載のベクターを含む宿主細胞。
7.CHO細胞である前記6記載の宿主細胞。
8.前記6または7記載の宿主細胞を用いて、前記1記載のポリペプチドを製造する方法。
9.前記1記載のポリペプチドと結合する抗体。
10.前記1記載のポリペプチドをコードするDNA、及び所望のタンパク質をコードするDNAが導入された、所望のタンパク質を生産するための細胞。
11.前記1記載のポリペプチドをコードするDNA、及び所望のタンパク質をコードするDNAが単一のベクターにより同時に導入されている前記10記載の細胞。
12.前記1記載のポリペプチドをコードするDNA、及び所望のタンパク質をコードするDNAが複数のベクターにより別々に導入されている前記10記載の細胞。
13.CHO細胞である前記10〜12のいずれかに記載の細胞。
14.前記10〜13のいずれかに記載の細胞を培養することを含む、所望のタンパク質の製造方法。
15.前記1記載のポリペプチドを含有する培地。
16.前記1記載のポリペプチドが培地に添加することにより培地に含有される前記15記載の培地。
17.前記1記載のポリペプチドが宿主細胞から分泌されることにより培地に含有される前記15記載の培地。
18.無血清培地、もしくは前記1記載のポリペプチド以外に哺乳動物由来の成分を含まない培地である前記15〜17のいずれかに記載の培地。
19.前記15〜18のいずれかに記載の培地を用いてCHO細胞を培養することを含む、所望のタンパク質の製造方法。
20.以下の工程を含む、所望のタンパク質の製造に用いる細胞の作製方法:
(a) CHO細胞に所望のタンパク質をコードするDNAを導入する工程、
(b) (a)で作製した細胞に、IGF-1をコードするDNAを導入する工程。
21.以下の工程を含む、所望のタンパク質の製造に用いる細胞の作製方法:
(a) CHO細胞に所望のタンパク質をコードするDNAを導入する工程、
(b) (a)で作製した細胞から、所望のタンパク質を発現する細胞を選択する工程、
(c) (b)で選択した細胞に、IGF-1をコードするDNAを導入する工程。
22.以下の工程を含む、所望のタンパク質の製造に用いる細胞の作製方法:
(a) CHO細胞に所望のタンパク質をコードするDNAとIGF-1をコードするDNAを同時に導入する工程、
(b) (a)で作製した細胞から、所望のタンパク質を発現する細胞を選択する工程。
23.所望のタンパク質をコードするDNAとIGF-1をコードするDNAを含む単一のベクターを用いて、CHO細胞に所望のタンパク質をコードするDNAとIGF-1をコードするDNAを同時に導入する前記22記載の方法。
24.以下の工程を含む、所望のタンパク質の製造に用いる細胞の作製方法:
(a) CHO細胞にIGF-1をコードするDNAを導入する工程、
(b) (a)で作製した細胞に、所望のタンパク質をコードするDNAを導入する工程。
25.以下の工程を含む、所望のタンパク質の製造に用いる細胞の作製方法:
(a) CHO細胞にIGF-1をコードするDNAを導入する工程、
(b) (a)で作製した細胞に、所望のタンパク質をコードするDNAを導入する工程。
(c) (b)で作製した細胞から、所望のタンパク質を発現する細胞を選択する工程。
26.IGF-1が請求項1記載のポリペプチドである、前記20〜25のいずれかに記載の作製方法。
27.以下の工程を含む、所望のタンパク質の製造に用いる細胞のスクリーニング方法:
(a) CHO細胞に所望のタンパク質をコードするDNAを導入する工程、
(b) (a)で作製した細胞から、所望のタンパク質を発現する細胞を選択する工程、
(c) (b)で選択した細胞にIGF-1をコードするDNAを導入する工程、
(d) (c)で作製した細胞から所望のタンパク質およびIGF-1を発現する細胞を選択する工程。
28.IGF-1が請求項1記載のポリペプチドである、請求項27記載のスクリーニング方法。
(a) CHO細胞に所望のタンパク質をコードするDNAを導入する工程、
(b) (a)で作製した細胞に、IGF-1をコードするDNAを導入する工程。
(a) CHO細胞に所望のタンパク質をコードするDNAを導入する工程、
(b) (a)で作製した細胞から、所望のタンパク質を発現する細胞を選択する工程、
(c) (b)で選択した細胞に、IGF-1をコードするDNAを導入する工程。
(a) CHO細胞に所望のタンパク質をコードするDNAとIGF-1をコードするDNAを同時に導入する工程、
(b) (a)で作製した細胞から、所望のタンパク質を発現する細胞を選択する工程。
(a) CHO細胞にIGF-1をコードするDNAを導入する工程、
(b) (a)で作製した細胞に、所望のタンパク質をコードするDNAを導入する工程。
(a) CHO細胞にIGF-1をコードするDNAを導入する工程、
(b) (a)で作製した細胞に、所望のタンパク質をコードするDNAを導入する工程。
(c) (b)で作製した細胞から、所望のタンパク質を発現する細胞を選択する工程。
(a) CHO細胞に所望のタンパク質をコードするDNAを導入する工程、
(b) (a)で作製した細胞から、所望のタンパク質を発現する細胞を選択する工程、
(c) (b)で選択した細胞にIGF-1をコードするDNAを導入する工程、
(d) (c)で作製した細胞から所望のタンパク質およびIGF-1を発現する細胞を選択する工程。
(1)cDNAの合成
CHO-DXB11細胞に抗インターロイキン6レセプター(IL-6R)抗体遺伝子を導入した抗IL-6R抗体産生細胞(特開平8-99902号公報、参考例2)からtotal RNA抽出を行った。得られたmRNAからcDNAを合成した。
(2)ハムスターIGF-1をコードするcDNAのクローニング
ハムスターIGF-1遺伝子は、PCRクローニングにより得た。PCRプライマーの設計は 既知であるラット/マウス/ヒト IGF1間で遺伝子配列が保存されている領域を用いておこなった。
実施例2:ハムスターIGF-1をコードするcDNAの塩基配列及びアミノ酸配列の決定
クローニングした遺伝子はDNAシ-ケンサーにて塩基配列を決定し、さらにこれからアミノ酸配列を決定し、ハムスターIGF-1をコードしていることを確認した。得られたアミノ酸配列を図1及び配列番号1に、DNA配列を配列番号2に示す。
実施例3:改変型ハムスターIGF-1遺伝子の作製及びそのIGF-1活性
(1)改変型ハムスターIGF-1遺伝子の作製
分泌型ハムスターIGF-1遺伝子はN末から3番目にマイナス電荷をもつE(グルタミン酸)を有する。この部位のアミノ酸をプラス電荷側にシフトするアミノ酸に変換した改変型ハムスターIGF-1遺伝子を作製した。IGF-1遺伝子への変異導入はSite-directed Mutagenesis法によりおこなった。
(2)天然型及び改変型ハムスターIGF-1の増殖能及び生存率に及ぼす効果
改変型ハムスターIGF-1遺伝子を発現させるプラスミド(図4)を構築し、親株である抗IL-6R抗体産生CHO細胞に導入し、ハイグロマイシンによる薬剤耐性株を選択、Stableに発現する細胞株を得た。得られた細胞株はさらにLimiting Dilutionによりシングルセルクローニングをおこない、IGF-1無添加の無血清培地で増殖能の高いクローン細胞を得た。
実施例4:ハムスター IGF-1(E3S) 導入細胞の抗体産生量
ハムスター IGF-1がヒト IGF-1以上の抗体産生量ポテンシャルをもつことを示すために、ハムスター IGF-1(E3S)とヒト IGF-1(E3S)を親株に導入した細胞中でもっとも培養挙動のよいシングルクローンの抗IL-6R抗体産生量を比較した。ヒト IGF-1(E3S)発現プラスミドはハムスター IGF-1(E3S)を鋳型にしてP20D, I35S, T67A変換のための変異導入を順におこなうことで構築した。実施例1と同様に親株抗IL6-R抗体産生CHO細胞に導入し、Hygromycin耐性細胞を選択したのち、IGF-1(E3S)を安定的発現にすることでIHF-1無添加培地中における増殖能を獲得した細胞株を選抜した。細胞株を限界希釈することでシングルクローンを得て、さらに増殖に優れたIGF-1(E3S)導入細胞を用いたFed-Batch培養をおこなって抗体産生量を比較した.
得られた結果を図7に示す。ハムスター IGF-1(E3S) 導入細胞の抗体産生量は培養8日目で973mg/Lであり、親株(843mg/L)、ヒト IGF-1(E3S)導入細胞(821mg/L)よりも優位であった。親株に対して最適化された培養方法にもかかわらずハムスター導入細胞の抗体産生量が最も高いことが確認された。
実施例5:ハムスター IGF-1(E3S) 導入細胞の抗体産生量
実施例4でハムスター IGF-1がヒト IGF-1以上の抗体産生量ポテンシャルをもつことを示したことから、さらにマウス IGF-1を加えた3種のIGF-1の抗体産生量ポテンシャルを比較した。マウス IGF-1(E3S)発現プラスミドはハムスター IGF-1(E3S)を鋳型にしてS69A変換のための変異を導入することで構築した。今回は変異体IGF-1(E3S)に加えて天然型IGF-1(E3E)の3種間比較も併せておこなうために、ハムスター、ヒト、マウス IGF-1(E3S)を鋳型にE3Eへの変異を導入して、それぞれの天然型IGF-1(E3E)発現プラスミドを構築した。
Claims (25)
- 配列番号1に記載のアミノ酸配列において、3番目のアミノ酸がセリンまたはリジンに置換されたアミノ酸配列からなり、かつインスリン様成長因子1(IGF-1)活性を有するポリペプチド。
- 3番目のアミノ酸がセリンに置換されている請求項1記載のポリペプチド。
- 3番目のアミノ酸がリジンに置換されている請求項1記載のポリペプチド。
- 請求項1記載のポリペプチドをコードするDNA。
- 請求項4記載のDNAを含むベクター。
- 請求項5記載のベクターを含む宿主細胞。
- CHO細胞である請求項6記載の宿主細胞。
- 請求項6または7記載の宿主細胞を用いて、請求項1記載のポリペプチドを製造する方法。
- 請求項1記載のポリペプチドをコードするDNA、及び所望のタンパク質をコードするDNAが導入された、所望のタンパク質を生産するための細胞。
- 請求項1記載のポリペプチドをコードするDNA、及び所望のタンパク質をコードするDNAが単一のベクターにより同時に導入されている請求項9記載の細胞。
- 請求項1記載のポリペプチドをコードするDNA、及び所望のタンパク質をコードするDNAが複数のベクターにより別々に導入されている請求項9記載の細胞。
- CHO細胞である請求項9〜11のいずれかに記載の細胞。
- 請求項9〜12のいずれかに記載の細胞を培養することを含む、所望のタンパク質の製造方法。
- 請求項1記載のポリペプチドを含有する培地。
- 請求項1記載のポリペプチドが培地に添加することにより培地に含有される請求項14記載の培地。
- 請求項1記載のポリペプチドが宿主細胞から分泌されることにより培地に含有される請求項14記載の培地。
- 培地が、無血清培地、もしくは請求項1記載のポリペプチド以外に哺乳動物由来の成分を含まない培地である請求項14〜16のいずれかに記載の培地。
- 請求項14〜17のいずれかに記載の培地を用いてCHO細胞を培養することを含む、所望のタンパク質の製造方法。
- 以下の工程を含む、所望のタンパク質の製造に用いる細胞の作製方法:
(a) CHO細胞に所望のタンパク質をコードするDNAを導入する工程、
(b) (a)で作製した細胞に、請求項1記載のポリペプチドをコードするDNAを導入する工程。 - 以下の工程を含む、所望のタンパク質の製造に用いる細胞の作製方法:
(a) CHO細胞に所望のタンパク質をコードするDNAを導入する工程、
(b) (a)で作製した細胞から、所望のタンパク質を発現する細胞を選択する工程、
(c) (b)で選択した細胞に、請求項1記載のポリペプチドをコードするDNAを導入する工程。 - 以下の工程を含む、所望のタンパク質の製造に用いる細胞の作製方法:
(a) CHO細胞に所望のタンパク質をコードするDNAと請求項1記載のポリペプチドをコードするDNAを同時に導入する工程、
(b) (a)で作製した細胞から、所望のタンパク質を発現する細胞を選択する工程。 - 所望のタンパク質をコードするDNAと請求項1記載のポリペプチドをコードするDNAを含む単一のベクターを用いて、CHO細胞に所望のタンパク質をコードするDNAと請求項1記載のポリペプチドをコードするDNAを同時に導入する請求項21記載の方法。
- 以下の工程を含む、所望のタンパク質の製造に用いる細胞の作製方法:
(a) CHO細胞に請求項1記載のポリペプチドをコードするDNAを導入する工程、
(b) (a)で作製した細胞に、所望のタンパク質をコードするDNAを導入する工程。 - 以下の工程を含む、所望のタンパク質の製造に用いる細胞の作製方法:
(a) CHO細胞に請求項1記載のポリペプチドをコードするDNAを導入する工程、
(b) (a)で作製した細胞に、所望のタンパク質をコードするDNAを導入する工程。
(c) (b)で作製した細胞から、所望のタンパク質を発現する細胞を選択する工程。 - 以下の工程を含む、所望のタンパク質の製造に用いる細胞のスクリーニング方法:
(a) CHO細胞に所望のタンパク質をコードするDNAを導入する工程、
(b) (a)で作製した細胞から、所望のタンパク質を発現する細胞を選択する工程、
(c) (b)で選択した細胞に請求項1記載のポリペプチドをコードするDNAを導入する工程、
(d) (c)で作製した細胞から所望のタンパク質および請求項1記載のポリペプチドを発現する細胞を選択する工程。
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CA2598570C (en) | 2016-03-22 |
AU2006215012A1 (en) | 2006-08-24 |
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