KR20200074209A - 생물 활성이 저하된 항체 배리언트 및 아이소폼 - Google Patents
생물 활성이 저하된 항체 배리언트 및 아이소폼 Download PDFInfo
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Abstract
Description
[도 1b] 도 1B는, Q-CDR-Clipped Variant의 분자 구조를 나타내는 모식도이다. 도 중의 숫자 및 그 아래의 알파벳은, 각각, 에미시주맙의 Q쇄의 N말단측으로부터 센 아미노산 잔기의 위치 및 당해 위치에 있어서의 아미노산 잔기(1문자 표기)를 나타낸다.
[도 2a] 도 2A는, CE-HPLC에 의한 에미시주맙 원약의 분리 결과를 나타내는 도면이다. 굵은 테두리로 나타낸 피크는 Protected disulfide isoform을 나타낸다.
[도 2b] 도 2B는, Protected disulfide isoform의 분자 구조를 나타내는 모식도이다. 도 중의 숫자 및 그 왼쪽의 알파벳 C는, 각각, 에미시주맙의 Q쇄의 N말단측으로부터 센 아미노산 잔기의 위치 및 당해 위치에 있어서의 시스테인 잔기를 나타낸다. 도 2C는, 에미시주맙 원약에 있어서의 Protected disulfide isoform의 함유율을 나타내는 도면이다. 여러 가지 조건(항체 산생 세포의 배양 조건)에 있어서의 당해 함유율을, 도 2A가 나타내는 CE-HPLC 분리 결과에 있어서의 Protected disulfide isoform의 피크의 면적%(area%)의 평균치(Mean) 및 표준 편차(Std Dev)로 나타내고 있다.
[도 3] 도 3은, IdeS 소화 및 환원 처리 후의 에미시주맙 및 Protected disulfide isoform을 역상 고속 액체 크로마토그래피에 의해 분리한 결과를 나타내는 도면이다. 도 3A∼D는, IdeS 소화 후에, 변성제를 포함하는 조건(A 및 C: 완전 환원 조건) 또는 포함하지 않는 조건(B 및 D: 부분 환원 조건)하에서 에미시주맙(A 및 B) 또는 Protected disulfide isoform(C 및 D)을 환원시킨 샘플의 분리 결과를 나타내고 있다. 완전 환원 조건(도 3A 및 C)에 있어서는, 에미시주맙과 Protected disulfide isoform의 어느 것에 대해서도, Q쇄 Fd(Q-Fd), J쇄 Fd(J-Fd), Q쇄 Fc(Q-Fc), J쇄 Fc(J-Fc), 및 L쇄(LC)를 나타내는 피크가 검출되어, 에미시주맙과 Protected disulfide isoform 사이에 환원 패턴의 차이는 검출되지 않았다. 한편, 부분 환원 조건(도 3B 및 D)에 있어서는, 완전 환원 조건의 경우와 마찬가지의 Q쇄 Fd, J쇄 Fd, Q쇄 Fc, J쇄 Fc, 및 L쇄를 나타내는 피크에 대하여, Protected Disulfide Isoform에 대해서만, 서로 다이설파이드 결합하고 있는 Q쇄 Fd와 J쇄 Fd의 헤테로2량체(J-Fd-Q-Fd)를 나타내는 특이한 피크가 검출되었다.
[도 4] 도 4는, IdeS 소화(및 변성 처리) 후의 에미시주맙 및 Protected disulfide isoform을 역상 고속 액체 크로마토그래피에 의해 분리한 결과를 나타내는 도면이다. 도 4A 및 B는, IdeS 소화 후의 Protected disulfide isoform(A) 또는 에미시주맙(B)의 분리 결과를 나타내고 있다. 도 4C 및 D는, IdeS 소화 후에 변성 처리한 Protected disulfide isoform(C) 또는 에미시주맙(D)의 분리 결과를 나타내고 있다. 변성 처리의 유무에 관계 없이, Protected Disulfide Isoform의 F(ab')2 부분(LC-J Fab-Q Fab-LC)은 에미시주맙의 주성분보다도 보지(保持) 시간이 길게 분리되었다.
[도 5] 도 5는, 여러 가지 배양 조건에서 에미시주맙 산생 CHO 세포를 배양했을 경우의 배양 상청에 포함되는 Q-CDR-Clipped Variant 함유율을 나타내는 도면이다. 배양 상청을 Protein A를 이용하여 정제한 시료를 Q-CDR-Clipped Variant 함유율의 측정에 이용했다. 세로축은 Q-CDR-Clipped Variant 함유율(피크 면적%)을 나타내고, 가로축은 여러 가지 배양 조건을 나타낸다.
[도 6] 도 6은, 여러 가지 배양 조건에서 에미시주맙 산생 CHO 세포를 배양했을 경우의 배양 상청에 포함되는 Q-CDR-Clipped Variant 함유율을 나타내는 도면이다. 배양 상청을 Protein A를 이용하여 정제한 시료를 Q-CDR-Clipped Variant 함유율의 측정에 이용했다. 세로축은 Q-CDR-Clipped Variant 함유율(피크 면적%)을 나타내고, 가로축은 여러 가지 배양 조건을 나타낸다.
[도 7] 도 7은, Q-CDR Clipped Variant를 포함하는 에미시주맙 항체 용액의, 양이온 교환 크로마토그래피(CEX)의 Bind & Elute mode 공정을 포함하는 정제 공정에 있어서의 각 획분을 CE-HPLC 분석한 결과를 나타내는 도면이다. 「부하 획분」은, 양이온 교환 컬럼에 부하한 항체 용액의 CE-HPLC 분석 결과를 나타낸다. 「세정 획분」은, pH 7.2로 조정한, 25mmol/L의 염화 나트륨을 포함하는 인산 완충액을 컬럼에 통액한 후(세정 후)의 컬럼 흡착 획분의 CE-HPLC 분석 결과를 나타낸다. 「용출 획분」은, 세정 후, pH 6.5로 조정한, 100mmol/L의 염화 나트륨을 포함하는 인산 완충액을 컬럼에 통액한 후의 컬럼 흡착 획분의 CE-HPLC 분석 결과를 나타낸다. 부하 획분 및 세정 획분과 비교하여, 용출 획분에 있어서는, 에미시주맙 항체의 피크보다 산성측의 Q-CDR Clipped Variant의 피크가 소실되고 있었다.
[도 8] 도 8A∼D는 SAXS 장치에 의한 에미시주맙(Main) 및 Protected Disulfide Isoform(BiAb3)의 분자 구조의 분석 결과를 나타내는 도면이다. Pair-distance distribution function [p(r)], Rg(nm), Dmax(nm)는 각각 분자의 2체간 거리 분포 함수, 관성 반경, 최대 길이를 나타낸다.
[도 9a] 도 9A는 HDX-MS 측정에 있어서의 중수소 교환율(%D)의 에미시주맙(양이온 교환 고속 액체 크로마토그래피의 주성분) 및 Protected Disulfide Isoform의 Residual Plot(중수소 교환 시간 30s, 60s, 120s, 240s, 480s, 960s, 1920s 및 3840s)을 나타낸다. 막대 그래프는 Q쇄, J쇄, 및 L쇄에 있어서의 각 중수소 교환 시간의 결과의 차의 총합을 나타낸다. 도 9B는 HDX-MS 측정에 의한 에미시주맙 및 Protected Disulfide Isoform의 사이에서 분자 구조의 차이가 시사된 부분을 나타낸다. 양자의 분자 구조상의 차이는 Q쇄에 있어서의 EU 넘버링 146위로부터 174위(서열 번호 10의 N말단측으로부터 152번째로부터 180번째) 및 J쇄에 있어서의 EU 넘버링 146위로부터 174위(서열 번호 11의 N말단측으로부터 148번째로부터 176번째)의 아미노산 잔기를 포함하는 펩타이드에서 현저했다(별표로 표시).
[도 9b] 도 9a의 계속을 나타낸다.
Claims (21)
- 아미노산 서열 SISPSGQSTYYRREVKG(서열 번호 2)를 포함하는 가변 영역을 갖는 항체의 배리언트로서,
(a) 상기 서열의 N말단측으로부터 12번째의 위치에 있어서의 아미노산 잔기 R; 또는
(b) 상기 서열의 N말단측으로부터 10∼12번째의 위치에 있어서의 아미노산 잔기 YYR
이 결손되고 당해 가변 영역이 당해 결손 부위에서 절단되어 있는, 항체 배리언트. - 제 1 항에 있어서,
상기 서열이 CDR 서열인, 항체 배리언트. - 제 1 항에 있어서,
상기 서열이 CDR2 서열인, 항체 배리언트. - 제 1 항에 있어서,
상기 서열이 중쇄에 포함되는 서열인, 항체 배리언트. - 제 1 항에 있어서,
이중 특이성(Bi-specific) 항체의 배리언트인, 항체 배리언트. - 제 1 항에 있어서,
에미시주맙의 배리언트인, 항체 배리언트. - 아미노산 서열 SISPSGQSTYYRREVKG(서열 번호 2)를 포함하는 가변 영역을 갖는 항체를 포함하는 시료를, 어피니티 크로마토그래피, 이온 교환 크로마토그래피, 순상 크로마토그래피, 역상 크로마토그래피, 친수성 상호작용 크로마토그래피(HILIC), 소수성 상호작용 크로마토그래피(HIC), 전하에 기초하는 분리, 사이즈 배제 크로마토그래피(SEC), 겔 침투 크로마토그래피(GPC), 또는 그들의 조합에 의해 분리하는 공정을 포함하는, 제 1 항 내지 제 6 항 중 어느 한 항에 기재된 항체 배리언트의 검출 방법.
- 제 7 항에 있어서,
제 1 항 내지 제 6 항 중 어느 한 항에 기재된 항체 배리언트를 표준품으로서 사용하는, 검출 방법. - 제 1 항 내지 제 6 항 중 어느 한 항에 기재된 항체 배리언트를 포함하는 의약 조성물로서, 해당 의약 조성물 중의 전체 항체 분자에 있어서의 해당 항체 배리언트의 비율이 5% 이하인, 의약 조성물.
- 제 9 항에 있어서,
항체가 에미시주맙인, 의약 조성물. - 제 9 항에 있어서,
양이온 교환 크로마토그래피(CEX)에 의한 정제를 포함하는 정제 공정에 의해 얻어지는, 의약 조성물. - 항체 산생 세포를 pH 7.1 이상 또한/또는 배양 온도 36℃ 이하에서 배양하는 공정을 포함하는, 제 1 항 내지 제 6 항 중 어느 한 항에 기재된 항체 배리언트의 생성을 억제하는 방법.
- 제 1 중쇄 및 제 2 중쇄를 포함하는 이중 특이성 항체의 아이소폼으로서,
(1a) 제 1 중쇄에 있어서의 EU 넘버링 144위의 시스테인과, 제 2 중쇄에 있어서의 EU 넘버링 200위의 시스테인 사이; 및
(1b) 제 1 중쇄에 있어서의 EU 넘버링 200위의 시스테인과, 제 2 중쇄에 있어서의 EU 넘버링 144위의 시스테인 사이
에 있어서 다이설파이드 결합을 형성하고 있거나, 혹은
(2a) 제 1 중쇄에 있어서의 EU 넘버링 226위의 시스테인과, 제 2 중쇄에 있어서의 EU 넘버링 229위의 시스테인 사이; 및
(2b) 제 1 중쇄에 있어서의 EU 넘버링 229위의 시스테인과, 제 2 중쇄에 있어서의 EU 넘버링 226위의 시스테인 사이
에 있어서 다이설파이드 결합을 형성하고 있는, 이중 특이성 항체 아이소폼. - 제 13 항에 있어서,
상기 (1a) 및 (1b)에 있어서 다이설파이드 결합을 형성하고 있는, 이중 특이성 항체 아이소폼. - 제 1 중쇄 및 제 2 중쇄를 포함하는 이중 특이성 항체의 아이소폼으로서, 양이온 교환 크로마토그래피를 이용하여 분리했을 경우에 상기 이중 특이성 항체보다도 알칼리성측의 영역에서 용출되는 것을 특징으로 하는, 이중 특이성 항체 아이소폼.
- 제 13 항 내지 제 15 항 중 어느 한 항에 있어서,
에미시주맙의 아이소폼인, 이중 특이성 항체 아이소폼. - 이중 특이성 항체를 포함하는 시료를, 어피니티 크로마토그래피, 이온 교환 크로마토그래피, 순상 크로마토그래피, 역상 크로마토그래피, 친수성 상호작용 크로마토그래피(HILIC), 소수성 상호작용 크로마토그래피(HIC), 전하에 기초하는 분리, 사이즈 배제 크로마토그래피(SEC), 겔 침투 크로마토그래피(GPC), 또는 그들의 조합에 의해 분리하는 공정을 포함하는, 제 13 항 내지 제 16 항 중 어느 한 항에 기재된 항체 아이소폼의 검출 방법.
- 제 17 항에 있어서,
제 13 항 내지 제 16 항 중 어느 한 항에 기재된 항체 아이소폼을 표준품으로서 사용하는, 검출 방법. - 제 13 항 내지 제 16 항 중 어느 한 항에 기재된 이중 특이성 항체 아이소폼을 포함하는 의약 조성물로서, 해당 의약 조성물 중의 전체 항체 분자에 있어서의 해당 항체 아이소폼의 비율이 2% 이하인, 의약 조성물.
- 양이온 교환 크로마토그래피에 의해 정제하는 공정을 포함하는, 제 13 항 내지 제 16 항 중 어느 한 항에 기재된 이중 특이성 항체 아이소폼의 함유율을 저감 하는 방법.
- 제 1 항, 제 13 항 또는 제 15 항에 있어서,
항체의 생물 활성이 현저하게 저하되어 있는, 항체 아이소폼 또는 배리언트.
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