KR20190117670A - 항-SIRPg 항체의 새로운 용도 - Google Patents
항-SIRPg 항체의 새로운 용도 Download PDFInfo
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- KR20190117670A KR20190117670A KR1020197027076A KR20197027076A KR20190117670A KR 20190117670 A KR20190117670 A KR 20190117670A KR 1020197027076 A KR1020197027076 A KR 1020197027076A KR 20197027076 A KR20197027076 A KR 20197027076A KR 20190117670 A KR20190117670 A KR 20190117670A
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- antigen
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Abstract
Description
도 1. 사람 SIRPg 재조합 단백질에서 항체의 블리츠에 의한 친화성 검정. SIRPg-His 재조합 단백질을 NINTA 바이오센서에 고정시키고 나타낸 항체를 10 ㎍/ml에서 가하였다. 값을 120초의 연합 기간(ka) 에 이은 120초의 해리 기간(kd)으로 유추하여 친화성 상수(KD)를 결정하였다.
도 2. SIRPg에서 항체의 ELISA 검정에 의한 결합 검정(사람 SIRPg-His 코팅 및 항-사람 카파 검출). SIRP29의 고정된 SIRPg-His(△), Kwar23(o), LSB2-20(●) 및 gG4 Ab 대조군(■)에서 ELISA에 의한 평가. 발견은 당나귀 항-사람 항체로 수행하고 TMB 기질을 사용하여 450nm에서 비색계로 나타내었다.
도 3. 항- SIRP 항체와 함께 예비-항온처리된 사람 SIRPg 재조합 단백질에서 CD47의 블리츠에 의한 친화성 분석. SIRPg-His 재조합 단백질을 NINTA 바이오센서 위에 10μg/ml에서 고정시키고 나타낸 항체를 20μg/ml(포화 농도)에서 가하였다. 이후에, CD47Fc를 100μg/ml에서 가하고 친화성 값을 120초의 연합 기간(ka) 및 120초의 해리 기간(kd) 후 유추하여 친화성 상수(KD)를 결정하였다.
도 4. 수지 세포의 존재하에서 T 세포 (CD4 + 및 CD8 + 세포)의 동종이계 반응. 건강한 자원자로부터의 말초 혈액 단핵 세포로부터 단리된 사람 T 세포를 동종이계 수지 세포(DC)로 5T 세포 : 1 DC 비에서 5일 동안 자극시켰다. 항체를 배양 0일째에 가하였다. 증식은 배양 마지막 12시간 동안 H3-티미딘을 혼입시켜 측정하였다. αSIRPα(■)는 국제 특허원 제PCT/EP2017/059071호에 기술된 하우스내 항체(in house antibody), SIRPa에 대해 특이적인 항-SIRPa-항체에 상응하며, 이는 SIRPg에 결합하지 않는다. SE7C2(●)는 또한 SIRPa에 특이적으로 결합하는 항체에 상응한다. αCD47 #1(▲) 및 #2(▼)는 CD47에 결합하는 항체에 상응한다. αSIRPγ(◇)는LSB2.20에 상응한다. Kwar23(□)은 SIRPg 및 SIRPa에 결합하여, SIIRPg와 CD47사이의 상호작용을 파괴하는 항체에 상응한다. SIRP29(◇)는 SIRPa 및 SIRPg에 결합하지만 SIRPg와 CD47 사이의 상호작용을 파괴하지 않는(다시 말해서, CD47은 항체 SIRP29의 존재하에서 SIRPg에 결합할 수 있다) 항체에 상응한다.
도 5. 사람 SIRPa 재조합 단백질에서 항체의 비아코어에 의한 친화성 분석. SIRPa-His 재조합 단백질을 CM5 칩 위에 5μg/ml(500RU)에서 고정시키고 나타낸 항체를 상이한 농도에서 가하였다. 값은 3분의 연합 기간(ka)에 이은 10분의 해리 기간(kd) 후 측정하여 친화성 상수(KD)를 결정하였다.
도 6. 블리츠에 의한 사람 SIRPa 재조합 단백질에서 항-SIRPg 항체 LSB2.20의 결합 분석. SIRPa-His 재조합 단백질을 NINTA 바이오센서 위에 고정시키고 나타낸 항체를 20μg/ml에서 가하였다. 값은 120초의 연합 기간(ka)에 이은 120초의 해리 기간(kd) 후 유추하여 친화성 상수(KD)를 결정하였다. 항-SIRPa는 SIRPa에 결합하지만 SIRPg에 결합하지 않는 것으로 공지된 국제 특허원 제PCT/EP2017/059071호에 기술된 하우스내 항-SIRPa 항체에 상응한다.
도 7. 사람 단핵구에서 항체의 결합 분석(SIRPa 변이체 1에 대한 동형접합체(v1/v1)). SIRP29(△) 및 Kwar23(●)의 사람 단핵구 v1/v1(사람 Fc 수용체 결합 억제제 항체로 미리 염색됨)에서 사이노플루오로메트리(cytofluorometry)에 의한 분석. 발견은 CantoII 세포계산기에서 PE 표지된 마우스 항-사람 Fc mAb에서 수행하였고, 값은 염색된 단핵구의 퍼센트에 상응한다. ED50은 당해 검정에서 신호의 50%에 이르는 나타낸 항체의 농도이다.
도 8. SIRPa에서 항체와 CD47이 경쟁. 바이오티닐화된 CD47-Fc의 고정 농도(6μg/ml)로 항온처리된 상이한 농도에서 SIRP29(△) 및 Kwar23(○)의 고정된 SIRPa-His에서 ELISA에 의한 평가. 발견은 스트렙타비딘 퍼옥시다제를 사용하여 수행함으로써 CD47 분자를 검출하고 TMB 기질을 사용하여 450nm에서 비색계로 나타내었다. 제2 실험의 결과는 IC50 값으로 제공된다. IC50은 당해 검정에서 신호의 50%를 억제하는 나타낸 항체의 농도이다.
도 9. 항-SIRPγ 항체(LSB2.20) 또는 항-SIRPα항체(하우스내 항체)로 처리한 GvHD 마우스대 처리하지 않는 GvHD 마우스 모델의 생존율. 생존율 퍼센트를 대조군(○)과 처리된 마우스 사이에서 비교하였다. 치료된 마우스는 4.45 mg/Kg의 항-SIRPα 항체(x) 또는 5mg/kg의 항-SIRPγ 항체(■)의 복강내 주사를 21일째까지 주당 3회 제공받았다.
도 10. 사람화된 GvHD 마우스 모델에서 사람 혈액 백혈구의 표현형. A: 사람 백혈구 확장. 퍼센트는 항-hCD45 PeCy7 클론 H130-cat557748(희석 1/20) 및 항-mCD45 PerCpCy5.5 클론 30F11-cat550994(희석 1/50)을 각각 사용하여 총 백혈구(사람 CD45+ 세포 및 마우스 CD45+ 세포) 내에서 측정하였다. B: 사람 T-세포 확장. 퍼센트는 항-hCD3 FITC 클론 UCHT1-cat555332(희석 1/10)을 사용하여 측정하였다. C: NK-세포 확장. 퍼센트는 항-hCD56 Alexa 647 클론 B159-cat557711(희석 1/10)을 사용하여 측정하였다.
Claims (14)
- T 세포 증식이 유해한 효과를 갖는 질환 또는 장애, 특히 사람 질환 또는 사람 장애에서의 사용을 위한 사람 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 항원 결합 항체 모사체로서,
상기 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 항원 결합 항체 모사체는 사람 SIRPg에 대한 사람 CD47의 결합을 억제하고,
상기 T 세포 증식이 유해한 효과를 갖는 질환 또는 장애가 다음으로 이루어진 그룹으로부터 선택되는, 사람 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 항원 결합 항체 모사체:
- 자가-면역 질환, 특히 류마티스 관절염, 제1형 당뇨병, 루프스, 건선,
- 만성 염증성 질환, 특히 크론병(Crohn disesse) 및 궤양성 대장염을 포함하는 염증성 창자병(chronic bowel disease),
- 만성 신경염증성 질환, 특히 다발 경화증, 뇌척수염,
- 면역-대사 질환, 특히 제II형 당뇨병,
- 전신 염증에 의해 유발된 심혈관 질환, 특히 죽상경화증, 및
- 이식체 기능부전(transplant dysfunction), 특히, 이식체-대-숙주 질환. - 제1항에 있어서, 상기 항체 또는 이의 항원-결합 단편이 음성 대조군과 비교하여 T 세포의 증식을 감소시키거나 억제하고, 특히 T 세포의 증식의 감소 또는 억제가 20%를 초과하는, 사람 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 항원 결합 항체 모사체.
- 제1항 또는 제2항에 있어서, 상기 질환이 다음으로 이루어진 그룹으로부터 선택되는 사람 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 항원 결합 항체 모사체:
- 자가-면역 질환, 특히 류마티스 관절염, 제1형 당뇨병, 루프스, 건선, 및
- 만성 염증성 질환, 특히 크론병 및 궤양성 대장염을 포함하는 염증성 창자병. - 제1항 또는 제2항에 있어서, 상기 질환이 이식체 기능부전, 특히 이식체-대-숙주 질환인, 사람 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 항원 결합 항체 모사체.
- 제1항 내지 제4항 중 어느 한 항에 있어서, 상기 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 이의 항원-결합 항체 모사체가 사람 SIRPa에 특이적으로 결합하는, 사람 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 항원 결합 항체 모사체.
- 제5항에 있어서, 상기 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 이의 항원-결합 항체 모사체가 사람 SIRPa에 대한 사람 CD47의 결합을 감소시키는, 사람 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 항원 결합 항체 모사체.
- 제1항 내지 제6항 중 어느 한 항에 있어서, 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 이의 항원-결합 항체 모사체가 서열 번호: 2, 서열 번호: 3 및 서열 번호: 4의 아미노산 서열을 포함하거나 이로 이루어진 CDR을 포함하는 가변 중쇄를 포함하고; 및 서열 번호: 6, 서열 번호: 8 및 서열 번호: 7의 아미노산 서열을 포함하거나 이로 이루어진 CDR을 포함하는 가변 경쇄를 포함하며, 특히 서열 번호: 1의 아미노산 서열을 포함하는 가변 중쇄 및 서열 번호: 5의 아미노산 서열을 포함하는 가변 경쇄를 가지고; 보다 특히 항체가 Kwar23인, 사람 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 항원 결합 항체 모사체.
- 제1항 내지 제4항 중 어느 한 항에 있어서, 상기 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 이의 항원-결합 항체 모사체가 사람 SIRPa에 특이적으로 결합하지 않는, 특히 항체가 LSB2.20인, 사람 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 항원 결합 항체 모사체.
- 제8항에 있어서, 상기 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 이의 항원-결합 항체 모사체가 사람 SIRPa에 대한 사람 CD47의 결합을 증가시키는, 사람 항-SIRPg 항체 또는 이의 항원-결합 단편 또는 항원 결합 항체 모사체.
- 의약으로서 동시, 별개 또는 연속 사용을 위한,
- 제1항 내지 제9항 중 어느 한 항에서 정의한 바와 같은 적어도 하나의 항-사람 SIRPg 항체 또는 이의 항원-결합 단편 또는 항원-결합 항체 모사체, 및
- 면역치료제, 면역억제제, 항생제 및 프로바이오틱스로 이루어진 그룹으로부터 선택된 적어도 하나의 제2 치료제를 포함하는 조합 생성물(combination product). - 제10항에 있어서, 상기 면역억제제가 사이클로스포린 A, 타크롤리무스, 마이코페놀레이트 모페틸, 라파마이신, 스테로이드, 항-TNF 제제, 항-IL-23 제제로 이루어진 그룹으로부터 선택되는 이의 사용을 위한 조합 생성물.
- i) 대상체의 생물학적 샘플에서 제1항 내지 제9항 중 어느 한 항에 따른 항-사람 SIRPg 항체 또는 이의 항원-결합 단편 또는 항원-결합 항체 모사체, 특히 제8항 또는 제9항에서 정의한 바와 같은 항체 또는 이의 항원-결합 단편 또는 항원 결합 항체 모사체를 사용하여 SIRPg의 발현 및/또는 발현의 수준을 시험관내(in vitro) 측정하는 단계를 포함하는, 상기 대상체의 생물학적 샘플로부터 대상체내 SIRPg 양성 세포를 측정하기 위한 시험관내 또는 생체외(ex vivo) 방법.
- SIRPg가 대상체에서 치료에 대한 반응의 예측인 생물마커로서 사용되는 시험관내 또는 생체외 방법에의, 제1항 내지 제9항 중 어느 한 항에 따른 적어도 하나의 항-사람 SIRPg 항체 또는 이의 항원-결합 단편 또는 항원-결합 항체 모사체의, 또는 제8항 또는 제9항에 정의한 바와 같은 항원 결합 항체 모사체의 용도.
- 하기를 포함하는, 특히 제1항 내지 제9항 중 어느 한 항에서 정의한 바와 같은 항-사람 SIRPg 항체 또는 이의 항원-결합 단편 또는 항원-결합 항체 모사체를 사용하여, 특히 제8항 또는 제9항에서 정의한 바와 같은 항체 또는 이의 항원-결합 단편 또는 항원-결합 항체 모사체를 사용하여, 치료에 대한 대상체의 반응을 예측하는 시험관내 방법:
- 특히 제1항 내지 제9항 중 어느 한 항에 정의된 바와 같은 항-사람 SIRPg 항체 또는 이의 항원-결합 단편 또는 항원-결합 항체 모사체를 사용하여, 특히 제8항 또는 제9항에서 정의한 바와 같은 항체 또는 이의 항원-결합 단편 또는 항원-결합 항체 모사체를 사용하여, 대상체, 특히 사람 대상체로부터 미리 수득된 샘플에서 SIRPg의 발현 수준을 측정하는 단계, 및
- SIRPg의 발현 수준을 반응하지 않은 대상체 집단내 SIRPg의 발현 수준의 대표적인 값에 대해 비교하는 단계,
여기서 대상체의 샘플 속에서 SIRPg의 보다 높은 발현 수준은 치료에 반응할 대상체에 대한 지표임.
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CN114206912B (zh) | 2019-06-07 | 2025-02-11 | Alx肿瘤生物技术公司 | 用于在血清学测定中减少结合cd47的药物的干扰的方法和试剂 |
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GB2613464A (en) * | 2020-05-08 | 2023-06-07 | Electra Therapeutics Inc | Sirp alpha, sirp beta 1, and sirp gamma antibodies and uses thereof |
KR20230018475A (ko) | 2020-06-01 | 2023-02-07 | 알렉소 온콜로지 인크. | 암 치료용 저메틸화제를 포함하는 병용 요법 |
US20220196651A1 (en) | 2020-12-06 | 2022-06-23 | ALX Oncology Inc. | Multimers for reducing the interference of drugs that bind cd47 in serological assays |
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