KR20200038560A - 저친화도 혈액-뇌 장벽 수용체 항체 및 그의 용도 - Google Patents
저친화도 혈액-뇌 장벽 수용체 항체 및 그의 용도 Download PDFInfo
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Abstract
Description
도 2a-f는 항-TfR 항체의 친화도 및 뇌 흡수 정도는 미량 용량 (약 50 ㎍/kg)에 비해 치료상 관련된 용량 (20 mg/kg)으로 투여될 때 반비례함을 보여준다. 도 2a는 TfR에 결합하기 위해 비오티닐화된 TfRA에 대해 경쟁하기 위해 증가하는 농도의 항-TfRA'B'C'D'E 변이체 항체가 사용되는 경쟁적 결합 ELISA를 도시한 것이다. 항-TfR 경쟁 ELISA는 PBS 내의 2.5 ㎍/ml의 정제된 뮤린 TfR 세포외 도메인으로 4℃에서 철야 코팅된 맥시소프 (Maxisorp) 플레이트 (미국 뉴저지주 넵튠)에서 수행하였다. 플레이트를 PBS/0.05% 트윈 (Tween) 20으로 세척하고, PBS 내의 수퍼블록 (Superblock) 차단 완충제 (써모 사이언티픽 (Thermo Scientific, 미국 뉴햄프셔주 허드슨))를 사용하여 차단하였다. 항-TfRA, 항-TfRB, 항-TfRC, 또는 항-TfRD (1:3 연속 희석)의 적정액을 비오티닐화된 항-TfRA (0.5 nM 최종 농도)와 조합하고, 플레이트에 1시간 동안 실온에서 첨가하였다. 플레이트를 PBS/0.05% 트윈 20으로 세척하고, HRP-스트렙타비딘 (서던 바이오테크 (Southern Biotech, 버밍햄))을 플레이트에 첨가하고, 1시간 동안 실온에서 인큐베이션하였다. 플레이트를 PBS/0.05% 트윈 20으로 세척하고, 플레이트에 결합된 비오티닐화된 항-TfRA를 TMB 기질 (바이오에프엑스 래보러토리즈 (BioFX Laboratories, 미국 오윙스 밀))을 사용하여 검출하였다. 도 2a의 결과는 모든 5개의 항-TfR 변이체가 별개로 평가된 단일 실험으로부터의 데이터를 제시한다. 상기 데이터로부터 결정된 IC50 값은 표 2에 제시한다. 도 2b는 미량 용량 (약 50 ㎍/kg)의 [125I]항-TfRA'B'C'D'E 변이체의 IV-주사 5분, 1, 4, 6, 및 24시간 후의 평균 뇌 흡수의 정량화를 도시한 것이다 (n=3). 도 2b의 결과는 모든 5개의 항-TfR 변이체가 별개로 평가된 단일 실험으로부터의 데이터를 제시한다. 도 2c는 도 1b에 대해 설명된 방법을 사용하여 1 및 24시간에서 항-TfR 변이체의 20 mg/kg IV 주사 후의 평균 뇌 흡수의 정량화를 보여준다. 실험을 동일한 조건 하에 항-TfRE를 사용하여 반복하고, 모든 결과를 도 2c에 제시한다. 도 2d는 친화도와 뇌 흡수 사이의 반비례 관계를 보여주는 모델이다. 도 2e는 고친화도 항-TfRA 또는 보다 저친화도 항-TfRB'C'D 항체의 IV 주사 후의 뇌 절편의 면역조직화학 염색의 비교이고, 항체 분포의 차이 (좌측 패널의 염색은 항-TfR 단독에 대한 것이다) 및 NeuN의 공동 국재화 정도 (우측 패널의 염색은 항-TfR 및 NeuN 둘 모두에 대한 것이다)를 보여준다. 규모 막대= 50 ㎛. 도 2f는 뉴런 내의 항-TfRD 국재화의 대표적인 고배율 영상이고 (NeuN 염색으로 표시됨); 이 데이터는 항-TfRD 및 NeuN이 공동 국재화하고, 따라서 항-TfRD가 BBB를 가로지르고 뉴런과 상호작용하는 반면에, 항-TfRA는 뉴런과 달리 주로 혈관계에 국재화함을 보여준다. 규모 막대= 20 ㎛.
도 3a-g는 이중특이적 항-TfR/BACE1 항체가 시험관 내에서 Aβ를 억제하고 뇌 내에 축적됨을 보여준다. 도 3a는 TfR 및 β-세크레타제 (BACE1) 둘 모두에 결합하도록 조작된 이중특이적 항체의 모델의 모식도이다. 도 3b는 도 2a에 대해 상기 설명한 항-TfR 경쟁 ELISA 검정에 의해 측정한 모 항-TfRA 및 항-TfRA/BACE1의 TfR에 대한 결합 친화도를 보여준다. 도 3c는 세포-기반 검정에서 항-TfRA/BACE1, 항-BACE1, 및 대조군 IgG의 처리 후에 APP를 안정하게 발현하는 HEK293 세포에 의해 생산된 Aβ 수준의 정량화를 보여준다. 야생형 인간 아밀로이드 전구체 단백질을 안정하게 발현하는 HEK293 세포에서 Aβ1-40 생산을 억제하는 항체의 능력은 다음과 같이 평가하였다. HEK293-APPWT 세포를 3 x 104 세포/웰의 밀도로 96-웰 플레이트 내에 철야 접종하였다. 항-BACE1 항체 또는 대조군 IgG1 항체를 함유하는 50 ㎕의 신선한 배지 (DMEM + 10% FBS)를 24시간 동안 37℃에서 세포와 함께 인큐베이션하였다. 세포 배지를 수거하고, Aβ1-40 HTRF® 검정 (시스바이오 (CisBio))을 제조자의 지시에 따라 사용하여 Aβ1-40의 존재에 대해 검정하였다. Aβ1-40 값을 CellTiter-Glo 발광 세포 생존력 검정 (Luminescent Cell Viability Assay) (프로메가 (Promega))을 사용하여 결정된 세포 생존력에 대해 표준화하였다. 실험을 적어도 3회 수행하고, 각각의 실험에서 각각의 지점을 이중으로 반복하였다. 도 3d는 마우스에서 IV-주사 미량 용량의 [125I]-표지된 항체 30분, 6, 24, 및 48시간 후에 평균 뇌 흡수의 정량화를 도시한 것이다 (n=4). 도 3e는 뇌에서 평균 항체 흡수의 정량화를 보여주고, 도 3f는 마우스에서 항체의 20 mg/kg IV 주사 1, 12, 24, 및 48시간 후에 평균 뇌 대 혈청 비율을 보여준다 (n=10). 도 3e 및 3f의 실험은 도 1b에 관하여 설명된 실험과 동일한 프로토콜을 이용하여 수행하였다. 도 3g는 항-TfR/BACE1 (좌측 패널) 또는 대조군 IgG (우측 패널)의 IV 주사 24시간 후에 마우스로부터의 뇌 절편의 면역조직화학 염색을 보여준다. NeuN와 항체의 공동-국재화는 항-TfRA/BACE1 처리 후에 관찰되지만 (NeuN 뉴런 염색이 널리 존재하는 항체 염색과 동시에 발생함), 대조군 IgG 처리한 마우스에는 존재하지 않는다 (NeuN 뉴런 염색 패턴만이 관찰되고, 항체 염색은 존재하지 않는다).
도 4a-e는 단일 전신 용량의 항-TfRA/BACE1이 중추 및 말초 Aβ1-40을 유의하게 감소시킴을 보여준다. 도 4a-d는 대조군 IgG, 항-BACE1, 또는 항-TfR/BACE1의 25 mg/kg 또는 50 mg/kg IV-주사 후의 뇌 (A,B) 및 혈장 (C,D) Aβ1-40 수준의 정량화를 보여준다. 간단히 설명하면, A베타1-40 측정의 경우, 반뇌 (hemi-brain)를 5 M 구아니딘 염산염 완충제 내에서 균질화하고, 샘플을 3시간 동안 실온에서 회전시킨 후, 새로 첨가된 아프로티닌 (20 mg/mL) 및 류펩틴 (10 mg/ml)을 함유하는 PBS 내의 0.25% 카제인, 5 mM EDTA (pH 8.0)에 희석하였다 (1:10). 희석한 균질액을 14,000 rpm에서 20분 동안 원심분리하고, 상청액을 A베타1-40 측정을 위해 단리하였다. 항체 농도 측정을 위해, 각각의 마우스로부터의 상응하는 반뇌를 상기 설명된 바와 같이 1% NP-40 내에 균질화시켰다. 관류 전에 전체 혈액을 EDTA 마이크로테이너 튜브 (비디 다이아그노스틱스 (BD Diagnostics)) 내에 수집하고, 5,000 x g에서 15분 동안 원심분리하고, 혈장 마우스 A베타1-40 및 항-TfR/BACE1 농도를 측정하기 위해 상청액을 단리하였다. 혈장 및 뇌 내의 총 마우스 A베타1-40의 농도는 상기 설명한 바와 유사한 절차를 따른 샌드위치 ELISA를 이용하여 결정하였다. A베타1-40의 C-말단에 특이적인 토끼 폴리클로날 항체 (밀리포어, 미국 매사추세츠주 베드포드)를 플레이트 상에 코팅하고, 비오티닐화된 항-마우스 A베타 모노클로날 항체 M3.2 (코번스 (Covance, 미국 매사추세츠주 데덤))를 검출을 위해 사용하였다. 검정의 정량 하한값은 혈장에서 1.96 pg/ml, 및 뇌에서 39.1 pg/g이었다. 실험군들 사이의 차이의 통계적 분석은 양측 (two-tailed) 언페어드 (unpaired) t-검정을 이용하여 수행하였다. *는 대조군 IgG에 비교한 유의성을 나타내고, #은 항-BACE1에 비교한 유의성을 나타낸다. * p<0.05, **p<0.01, ***p<0.001; n=10 (모든 군에 대해). 도 4e는 대조군 IgG-주사 마우스에 비해 Aβ1-40 수준의 백분율로서 계산된, (A-D)에서의 데이터로부터의 평균 Aβ1-40 감소를 보여준다.
도 5a-b는 천연 다양성 파지 디스플레이 라이브러리의 나이브 종류로부터 얻은 항-BACE1 클론 YW412.8 및 YW412.8의 친화도-성숙 형태의 경쇄 및 중쇄 아미노산 서열을 도시한 것이다. 도 5a는 가변 경쇄 (VL) 서열 정렬 (서열 1-6)을 도시한 것이다. 도 5b는 가변 중쇄 (VH) 서열 정렬 (서열 7-8)을 도시한 것이다. 두 도면에서, 각각의 클론에 대한 HVR 서열은 박스로 표시된 영역으로 표시되고, 제1 박스는 HVR-L1 (도 5a) 또는 HVR-H1 (도 5b)을, 제2 박스는 HVR-L2 (도 5a) 또는 HVR-H2 (도 5b)를, 제3 박스는 HVR-L3 (도 5a) 또는 HVR-H3 (도 5b)을 나타낸다.
도 6a-b는 합성 다양성 파지 디스플레이 라이브러리의 나이브 종류로부터 얻은 클론 Fab 12 및 Fab 12의 친화도-성숙 형태의 경쇄 및 중쇄 아미노산 서열을 도시한 것이다. 도 6a는 경쇄 서열 정렬 (서열 9-12)을 도시한 것이다. 도 6b는 중쇄 서열 정렬 (서열 13)을 도시한 것이다. 두 도면에서, 각각의 클론에 대한 HVR 서열은 박스로 표시된 영역으로 표시되고, 제1 박스는 HVR-L1 (도 6a) 또는 HVR-H1 (도 6b)을, 제2 박스는 HVR-L2 (도 6a) 또는 HVR-H2 (도 6b)를, 제3 박스는 HVR-L3 (도 6a) 또는 HVR-H3 (도 6b)을 나타낸다.
도 7a-b는 예시적인 항-A베타 항체의 중쇄 (도 7a; 서열 14) 및 경쇄 (도 7b; 서열 15)를 도시한 것이다.
도 8a-b는 마우스에서 단일 치료 용량 투여 후에 혈청 (도 8a) 및 뇌 (도 8b) 내의 항-TfRA'B'C'D'E의 정량화를 도시한 것이다. 6-8주령 야생형 암컷 C57B/6 마우스를 모든 연구에 사용하였다. 마우스에게 20 mg/kg의 항-TfR 변이체 또는 대조군 IgG를 정맥내 주사하였다. 뇌 및 혈청 내의 항체 수준을 주사 1 및 12시간 및 1, 2, 4, 5, 6, 및 8일 후에 측정하였다. 총 주사 부피는 260 ㎕를 초과하지 않았고, 항체는 필요한 경우 D-PBS (인비트로겐 (Invitrogen)) 내에 희석하였다. 실험은 동일한 프로토콜을 이용하여 수행하였고, 그의 실험 결과를 도 1b에 제시한다.
도 9a-e는, 이중특이적 항-TfRA'D'E/BACE1 항체가 뇌 내에 축적되고 생체 내에서 Aβ 생산을 억제하는 상이한 정도를 보여준다. 도 9a는 도 2a에 설명된 바와 동일한 검정 절차를 따라 항-TfRA'D'E/BACE1을 사용한 항-TfR 경쟁 ELISA 검정의 결과를 도시한 것이다. 상기 데이터로부터 결정된 IC50 값을 표 3에 제시한다. 도 9b 및 9d는 마우스 (n=6)에서 항체의 50 mg/kg IV 주사 1, 2, 4, 6, 8 및 10일 후에 혈장 내에서 관찰된 항체의 양 (9b) 및 관찰된 A베타1-40의 양 (9d)을 정량한 것이다. 도 9c는 처리 1, 2, 4, 6, 8 및 10일 후에 평균 뇌 흡수의 정량화를 도시한 것이고, 도 9e는 동일한 처리된 마우스의 뇌에서 관찰된 A베타1-40의 양을 도시한 것이다. 6-8주령 야생형 암컷 C57B/6 마우스를 모든 연구에 사용하였다. 마우스에게 50 mg/kg 항-TfR/BACE1 변이체, 대조군 IgG, 또는 항-BACE1을 정맥내 주사하였다. 지시된 시간 후에, 마우스를 D-PBS로 관류시키고, 각각의 동물에 대한 뇌 및 혈장 항체 농도를 상기 설명된 바와 같이 측정하였다. 검정은 도 4 설명에 기재된 바와 같이 수행하였다.
도 10 및 11은, 이중특이적 항-TfRA'D'E/A베타 항체가 PS2APP 마우스 (도 10) 및 야생형 마우스 (도 11)의 뇌 내에 축적되는 상이한 정도를 보여준다. 도 10a 및 11a는 마우스에서 항체의 50 mg/kg i.p. 주사 1일 후에 혈장 내에서 관찰된 항체의 정량화를 도시한 것이다 (n= 4-6). 도 10b 및 11b는 동일한 처리된 마우스에서 평균 뇌 흡수를 정량한 것이다.
| 신경계 장애 약물 및 이들이 치료를 위해 사용될 수 있는 상응하는 장애의 비-제한적인 예 | |
| 약물 | 신경계 장애 |
| 항-BACE1 항체 | 알츠하이머, 급성 및 만성 뇌 손상, 뇌졸중 |
| 항-A베타 항체 | 알츠하이머 질환 |
| 뉴로트로핀 | 뇌졸중, 급성 뇌 손상, 척수 손상 |
| 뇌-유도 신경영양 인자 (BDNF), 섬유모세포 성장 인자 2 (FGF-2) |
만성 뇌 손상 (신경발생) |
| 항-표피 성장 인자 수용체 (EGFR)-항체 | 뇌암 |
| 아교 세포주 유도 신경 인자 (GDNF) | 파킨슨 질환 |
| 뇌-유도 신경영양 인자 (BDNF) | 근위축성 측삭 경화증, 우울증 |
| 리소좀 효소 | 뇌의 리소좀 축적 장애 |
| 섬모 신경영양 인자 (CNTF) | 근위축성 측삭 경화증 |
| 뉴레굴린-1 | 정신분열병 |
| 항-HER2 항체 (예를 들어 트라스투주맙) | HER2-양성 암으로부터의 뇌 전이 |
| 항-TfR 항체에 대한 IC50 측정치 | ||
| 항체 | IC50 (nM) | 표준 편차 |
| 항-TfRA | 1.7 | 0.1 |
| 항-TfRB | 6.9 | 0.4 |
| 항-TfRC | 65 | 12 |
| 항-TfRD | 111 | 16 |
| 항-TfRE | > 5x104 | - |
| 항-TfR/BACE1 항체에 대한 IC50/친화도 측정치 | ||
| 항체 | IC50 | Kd (비아코어) (nM) |
| 항-TfRA/BACE1 | 15 nM | 33.3±1.7 |
| 항-TfRD/BACE1 | 1.6 μM | 630±50 |
| 항-TfRE/BACE1 | >50 μM | N.D. |
Claims (1)
- 인간에 대한 치료 방법.
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| US41822310P | 2010-11-30 | 2010-11-30 | |
| US61/418,223 | 2010-11-30 | ||
| PCT/US2011/062445 WO2012075037A1 (en) | 2010-11-30 | 2011-11-29 | Low affinity blood brain barrier receptor antibodies and uses therefor |
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| KR20200038560A true KR20200038560A (ko) | 2020-04-13 |
| KR102188544B1 KR102188544B1 (ko) | 2020-12-08 |
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| KR1020207009790A Expired - Fee Related KR102188544B1 (ko) | 2010-11-30 | 2011-11-29 | 저친화도 혈액-뇌 장벽 수용체 항체 및 그의 용도 |
| KR1020197035389A Expired - Fee Related KR102099462B1 (ko) | 2010-11-30 | 2011-11-29 | 저친화도 혈액-뇌 장벽 수용체 항체 및 그의 용도 |
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| EP (2) | EP2646470B1 (ko) |
| JP (3) | JP6125430B2 (ko) |
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| CN (2) | CN110251668A (ko) |
| AR (1) | AR084020A1 (ko) |
| AU (2) | AU2011336716B2 (ko) |
| BR (1) | BR112013013083A2 (ko) |
| CA (1) | CA2818173C (ko) |
| CL (1) | CL2013001535A1 (ko) |
| CO (1) | CO6721052A2 (ko) |
| CR (1) | CR20130255A (ko) |
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| EA (1) | EA034333B1 (ko) |
| EC (1) | ECSP13012724A (ko) |
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