JP2021113210A5 - - Google Patents

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JP2021113210A5
JP2021113210A5 JP2021070121A JP2021070121A JP2021113210A5 JP 2021113210 A5 JP2021113210 A5 JP 2021113210A5 JP 2021070121 A JP2021070121 A JP 2021070121A JP 2021070121 A JP2021070121 A JP 2021070121A JP 2021113210 A5 JP2021113210 A5 JP 2021113210A5
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antibody
cytotoxic agent
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Claims (18)

  1. 溶液における精製された抱合体を調製する方法であって、前記抱合体が、抗体に連結された細胞傷害剤を含み、前記方法が、
    (a)細胞傷害剤ヘテロ2官能性リンカー試薬に接触させて該リンカーを細胞傷害剤に共有結合させ、それによってそれに結合したリンカーを有する細胞傷害剤を含む未精製の第1の混合物を調製することと、
    (b)未精製の第1の混合物を6.5〜8.5のpHを有する溶液中で抗体と反応させることによって、それに結合したリンカーを有する細胞傷害剤抗体を抱合させて第2の混合物を調製することと、
    (c)第2の混合物を接線流濾過、透析、ゲル濾過、吸着クロマトグラフィ、選択的沈殿、又はこれらの組み合わせに供して精製された抱合体を調製することを含む方法。
  2. 工程(b)において、溶液6.5のpHを有する、請求項1の方法。
  3. 工程(b)において、溶液が7.0のpHを有する、請求項1の方法。
  4. 工程(b)において、溶液が7.5のpHを有する、請求項1の方法。
  5. 工程(b)において、溶液が8.0のpHを有する、請求項1の方法。
  6. 工程(b)における第2の混合物が、分子内又は分子間の反応によって形成される望ましくない架橋された、加水分解された種を実質的に含まない請求項1の方法。
  7. 細胞傷害剤チオール基を含む、請求項1の方法。
  8. 細胞傷害剤が、カンプトテシンである、請求項の方法。
  9. 細胞傷害剤がマイタンシノイド化合物、タキサン化合物、CC−1065化合物、ダウノルビシン化合物、ドキソルビシン化合物、ピロロベンゾジアゼピン化合物、カリケラミシン、またはアウリスタチンである請求項の方法。
  10. 抗体がモノクローナル抗体である請求項の方法。
  11. 抗体が、ヒトモノクローナル抗体又はヒト化モノクローナル抗体である請求項の方法。
  12. 抗体が、MY9、抗B4、C242、またはEpCAM、CD2、CD3、CD4、CD5、CD6、CD11、CD19、CD20、CD22、CD26、CD30、CD33、CD37、CD38、CD40、CD44、CD56、CD79、CD105、CD138、EphA受容体、EphB受容体、EGFR、EGFRvIII、HER2、HER3、メソテリン、cripto、アルファベータ、アルファベータおよびアルファベータインテグリンからなる群から選択される抗原に結合する抗体である請求項の方法。
  13. ヒト抗体又はヒト化抗体が、huMy9−6、huB4、huC242、huN901、DS6、CNTO95、B−B4、トラスツズマブ、ペルツズマブ、ビバツズマブ、シブロツズマブもしくはリツキシマブ、又はEphA2受容体、CD38、およびIGF−IRからなる群から選択される抗原に結合するヒト抗体もしくはヒト化抗体である請求項11の方法。
  14. 2官能性リンカー試薬に対して過剰な細胞傷害剤を使用する、請求項1の方法。
  15. リンカーが切断可能なリンカー又は切断不能なリンカーである、請求項1の方法。
  16. ヘテロ2官能性リンカー試薬がN−ヒドロキシスクシンイミドエステル基を含む、請求項7の方法。
  17. ヘテロ2官能性リンカー試薬が以下の式の1つで表される、請求項16の方法:
    Figure 2021113210
  18. ヘテロ2官能性リンカー試薬が以下の式で表される、請求項16の方法:
    Figure 2021113210

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