JP7175908B2 - N-アシル-x-グルタミンジペプチドを含む培地 - Google Patents
N-アシル-x-グルタミンジペプチドを含む培地 Download PDFInfo
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- JP7175908B2 JP7175908B2 JP2019548006A JP2019548006A JP7175908B2 JP 7175908 B2 JP7175908 B2 JP 7175908B2 JP 2019548006 A JP2019548006 A JP 2019548006A JP 2019548006 A JP2019548006 A JP 2019548006A JP 7175908 B2 JP7175908 B2 JP 7175908B2
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Description
本発明との関連において、以下の細胞培地が、生体工学による製造工程の生産性を高めることがわかった。
細胞培地であって、所定のモル比R=n(アシル-X-Q)/n(Qsource)で、一連のN-アシル化ジペプチドであるアシル-X-QからのL-グルタミンと、一連の他のグルタミン源QsourceからのL-グルタミンとを含み、
ここで、Xは、L-アミノ酸として定義され;
Qは、L-アミノ酸Xにアミド結合を介して接続したL-グルタミンとして定義され;
アシルは、L-アミノ酸Xのアミノ末端にアミド結合を介して接続したC1-C7-アシル部分として定義され;
Rは、0.03-20の範囲であると定義され;
n(アシル-X-Q)は、前記培地中の一連のN-アシル化ジペプチドであるアシル-X-Qに含まれるL-グルタミンの物質の合計量であり;
n(Qsource)は、前記培地中の一連の他のグルタミン源Qsourceに含まれるL-グルタミンの物質の合計量である、細胞培地。
ここで、Xは、L-アミノ酸として定義され;
Qは、L-アミノ酸Xにアミド結合を介して接続したL-グルタミンとして定義され;
アシルは、L-アミノ酸Xのアミノ末端にアミド結合を介して接続したC1-C7-アシル部分として定義され;
Rは、0.03-20の範囲であると定義され;
n(アシル-X-Q)は、前記培地中の一連のN-アシル化ジペプチドであるアシル-X-Qに含まれるL-グルタミンの物質の合計量であり;
n(Qsource)は、前記培地中の一連の他のグルタミン源Qsourceに含まれるL-グルタミンの物質の合計量である、細胞培地に関する。
アラニン (Ala/A)
アルギニン (Arg/R)
アスパラギン (Asn/N)
アスパラギン酸 (Asp/D)
システイン (Cys/C)
グルタミン酸 (Glu/E)
グルタミン (Gln/Q)
グリシン (Gly/G)
ヒスチジン (His/H)
イソロイシン (Ile/I)
ロイシン (Leu/L)
リシン (Lys/K)
メチオニン (Met/M)
フェニルアラニン (Phe/F)
プロリン (Pro/P)
セリン (Ser/S)
トレオニン (Thr/T)
トリプトファン (Trp/W)
チロシン (Tyr/Y)
バリン (Val/V)
(i)それぞれの実施形態で定義されるようなアシルおよびXを含む、N-アシル化ジペプチドであるアシル-X-Q。
(ii)一連の他のL-グルタミン源Qsource。
アセチル-A-Qを、遊離グルタミンまたはA-Qと0%-100%のモル比で混合した。この混合物を、グルタミンを含まない培地(PowerCHO-2 CD、Lonza AG、フィスプ、スイス)に加え、最終培地中の合計グルタミン濃度8mMを得た。成長および生産性を、チャイニーズハムスター卵巣(CHO)細胞(Subclone DG44;Life Technologies Corporation、カールスバッド、USA)を用いて測定した。培養物の生存率が80%未満まで落ちる点まで、培養を続けた。第3継代からのデータを使用した。アセチル-A-Qと遊離グルタミン(Q)を混合した結果を表1にまとめている。全ての力価に関連する情報は、100%の遊離グルタミンの力価に対して与えられる。したがって、相対的な細胞特異的生産性は、まず、相対力価を積算生存細胞密度(IVCD)によって割り算し、次いで、この数字を、100%遊離グルタミンについての力価/IVCD比によって割り算することによって得られた。相対的な時間特定の生産性は、相対力価を、サンプリングまでの培養時間で割り算し、次いで、この数字を、遊離グルタミンについての力価/培養時間比で割り算することによって得られた。
実施例2:供給バッチ培養における、アセチル-A-Qと、異なるグルタミン源との混合物
Claims (6)
- 所定のモル比R=n(アシル-X-Q)/n(Qsource)で、一連のN-アシル化ジペプチドであるアシル-X-QからのL-グルタミンと、一連の他のグルタミン源QsourceからのL-グルタミンとを含み、
ここで、Xは、L-アミノ酸として定義され;
Qは、L-アミノ酸Xにアミド結合を介して接続したL-グルタミンとして定義され;
アシルは、L-アミノ酸Xのアミノ末端にアミド結合を介して接続したC1-C7-アシル部分として定義され;
Rは、1/3-3の範囲であると定義され;
n(アシル-X-Q)は、前記培地中の一連のN-アシル化ジペプチドであるアシル-X-Qに含まれるL-グルタミンの物質の合計量であり;
n(Qsource)は、前記培地中の一連の他のグルタミン源Qsourceに含まれるL-グルタミンの物質の合計量であり;
Qは、L-アミノ酸Yにアミド結合を介して接続したL-グルタミンとして定義され;ジペプチドY-Q中のYとQを接続するアミド結合は、アミノ酸Yのカルボキシ末端とグルタミンQのアミノ末端を含む規則的な骨格のアミド結合である、
N-アシル化ジペプチドであるアシル-X-Qの合計濃度は、1mM-8mMの範囲であり、
前記一連のN-アシル化ジペプチドであるアシル-X-Qが、アセチル-A-Qとして定義され、
前記一連の他のL-グルタミン源Qsourceの唯一の構成要素がジペプチドY-Qであり、Yがアラニンである、
哺乳動物細胞用培地。 - 無血清である、
請求項1記載の哺乳動物細胞用培地。 - 既知化学組成である、
請求項1または2のいずれかに記載の哺乳動物細胞用培地。 - 哺乳動物細胞を培養するための請求項1乃至3のいずれかに記載の哺乳動物細胞用培地の使用。
- 細胞培養産物を製造する方法であって、哺乳動物細胞と、請求項1乃至3のいずれかに記載の哺乳動物細胞用培地とを接触させる工程を含む、方法。
- 前記培地と接触した前記哺乳動物細胞は、CHO細胞である、請求項5記載の方法。
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