KR102608311B1 - Crbn 결합 펩티드 및 이를 이용한 알츠하이머 병 예방 또는 치료용 조성물 - Google Patents
Crbn 결합 펩티드 및 이를 이용한 알츠하이머 병 예방 또는 치료용 조성물 Download PDFInfo
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Abstract
Description
도 1f는 Crbn-/- 및 Crbn+/+ MEF 세포를 2.5 ㎍/ml CHX로 처리하고 면역 블롯 분석을 수행한 결과이다(통계 분석은 Hsp70, DJ1 및 DJ2 순서로 위에서 아래로 표시됨). 도 1g는 Crbn-/- 및 Crbn+/+ MEF 세포를 0.5 ㎍/ml MG132로 처리하고 면역 블롯 분석을 수행한 결과이다(통계 분석은 Hsp70, DJ1 및 DJ2 순서로 위에서 아래로 표시됨).
도 2는 타우의 헤파린 매개 응집에 대한 CRBN 및 DJ2의 효과에 대한 실험이다. 구체적으로, 도 2a는 전장 hTau-44 (5 μM)를 48 시간 동안 지시된 단백질 조합과 함께 배양한 다음 5 μM ThT를 첨가하고 440 nm에서 여기와 함께 480 nm에서 형광 방출을 측정한 결과이다(헤파린을 2.5 μM의 농도로 대조군을 제외한 모든 반응에 포함, Student's t-test는 95% 유의 수준의 데이터를 정량화 하는데 사용됨). 도 2b는 모노머 hTau-K18 (5 μM)을 지시된 조합(5 μM) 및 5 μM ThT와 함께 4 시간 동안 배양하여 형광 방출은 480 nm에서 여기되었고 440 nm에서 여기됨을 확인한 결과이다(헤파린은 2.5 μM의 농도로 대조군을 제외한 모든 반응에 포함) 도 2c는 모노머 K18을 4시간 동안 헤파린-유도된 응집을 위해 DJ2와 함께 또는 DJ2 없이 배양하고 TEM 분석을 수행한 결과이다. 도 2d는 SHSY5Y 세포를 단량체 K18로 처리하고, DJ2 및 CRBN의 존재 또는 부재하에 K18을 응집시킨 결과를 나타내며, 처리 48 시간 후에 사진을 찍었고, MTT 분석을 수행하여 세포 생존력을 평가한 결과이다(오차 막대는 SEM을 나타냄. Student's t-test는 95% 유의 수준의 데이터를 정량화하는 데 사용됨)
도 3은 CRBN의 N-말단 Lon 도메인이 DJ2의 C-말단 도메인에 결합한다는 것을 확인한 것이다. 구체적으로, 도 3a 및 3b는 하기 도 3c 및 도 3d에 사용된 전장 (Full) rCRBN 및 결실 구축물의 개략도를 나타낸 것이다(CULT (Cereblon domain of Unknown activity, binding cellular Ligands and Thalidomide), L (linker), CTD (C-terminal domain)). 도 3c 및 3e는 SH-SY5Y 세포를 Myc-DJ2 및 표시된 플라스미드로 일시적으로 동시 형질 감염시키고 세포 추출물을 α-Myc 항체로 면역 침전시킨 다음, SDS-PAGE로 분류하고, Myc 및 HA 항체로 면역 블롯팅한 결과를 나타낸 것이다(~ 55kDa의 밴드는 IgG 중쇄 (HC)를 나타내고 ~ 25kDa의 밴드는 IgG 경쇄 (LC)를 나타냄. 별표는 비 특정 대역을 나타냄). 도 3d 및 3f는 SH-SY5Y 세포를 HA-CRBN 및 지정된 프라미드로 일시적으로 동시 형질 감염 시킨 다음, 24 시간 후에 HA 항체로 IP를 수행한 결과이다.
도 4는 K32 및 K350가 DJ2의 주요 유비퀴틴화 사이트라는 것을 확인한 실험결과이다. 구체적으로, 도 4a는 SH-SY5Y 세포를 야생형(WT) DJ2 및 리신 돌연변이 체로 형질 감염시키고, 세포를 2.5 ㎍/ml CHX로 처리하여 면역 블롯 분석을 수행한 결과이다. 도 4b는 상기 도 4a 결과를 그래프로 나타낸 것이다. 도 4c는 K32 및 K350 잔기의 이중 돌연변이체의 경우 유비퀴틸화가 손상됨을 확인한 것이다.
도 5는 CUMS(chronic ultra-mild stress) 및 타우 병리에 대한 CRBN KO의 효과를 확인한 것이다. 구체적으로, 도 5a는 Crbn-/-(KO) 및 Crbn+/+ (WT) 마우스를 CUMS 패러다임에 노출시킨 다음, WBL을 SDS-PAGE로 분별하고 항체로 면역 블롯팅을 수행한 결과이다. 도 5b 및 5c는 WT 및 KO 마우스의 WBL을 선택된 pTau 에피토프 및 타우키나제에 대한 웨스턴 블롯 분석 결과를 나타낸 것이다. 도 5d는 KO 및 WT 마우스의 각 그룹에서 5 마리의 마우스를 사용하여 n = 3으로 통계처리한 결과를 나타낸 것이다. 도 5e 및 5f는 상기 도 5b 및 5c 결과를 t-테스트에 의해 P < 0.05 인 통계 분석 결과를 나타낸 것이다.
도 6은 CRBN KO는 타우 병리의 확산을 억제함을 확인한 것이다. 구체적으로, 도 6a는 마우스 뇌의 해부 개략도로, 웨스턴 블롯팅을 분석하기위한 전방 반대측 (AC), 전방 동측 (AI), 후방 반대측 (PC), 후방 동측 (PI) 및 소뇌 (Cb)로 구분하였으며, PI 영역은 측면 편도 주사 부위를 포함한다. 도 6b는 OA를 WT 및 KO 마우스의 뇌에 입체적으로 주사하고, WBL을 RIPA 완충액에서 제조하며, pTau 어레이의 항체로 블롯팅한 결과를 나타낸 것이다. 도 5c는 각각의 KO 및 WT 마우스 n = 3 인 그룹에서 상대적 밴드 강도 정량화 결과이다(오차막대는 SEM을 나타냄).
도 7은 인산화 매개 타우 이량체화에 대한 CRBN KO의 효과를 나타낸 것이다. 구체적으로, 도 7a는 HEK293T 세포는 CRBN의 CRISPR/Cas9-매개 녹아웃 (KO)을 실시하거나 음성 대조군 (NC)으로서 사용되었으며, Myc-tau를 세포주 모두에 일시적으로 형질 감염시키고 웨스턴 블롯을 수행한 결과이다. 도 7b는 상기 도 7a의 결과를 컬러 그레이던트 스케일로 나타낸 것이다. 도 7c는 SH-SY5Y 세포를 siRNA 또는 siRNACRBN으로 일시적으로 형질 감염시킨 다음, 상기 세포를 tau40-VN173 및 tau-VC155 구축물로 형질 감염시키고 OA (30 nM)로 처리하여 공초점 현미경을 사용해 BiFC를 측정한 결과이다(Hoechst 염료가 카운터 스테인으로 사용됨).
도 8은 타우 병리에서 CRBN 및 DJ2의 역할을 개략적으로 나타낸 것이다.
도 9는 DJ2의 CRBN 및 타우에 결합여부 및 DJ1의 thalidomide 비의존적 분해에 관한 실험 내용이다. 구체적으로, 도 9a는 His-tagged DJ2 및 GST-tagged CRBN에 GST 풀다운 분석을 수행하고 항-DJ2 및 항-CRBN 항체로 블롯팅한 결과를 나타낸 것이고, 도 9b는 SH-SY5Y 세포를 HA-Ub로 일시적으로 형질 감염시키고 30 시간 후 세포를 thalidomide로 24 시간 동안 처리하고 마우스 IgG 대조군 또는 α-DJ2 항체로 세포 용해 및 IP를 수행한 결과이다. 도 9c는 SH-SY5Y 세포를 일시적으로 Myc-tagged 타우 및 FLAG-tagged DJ2로 공동-형질 감염시키고 24시간 후 세포 추출물을 α-Myc 항체로 면역 침전 및 SDS-PAGE로 분별하고, 지시된 항체로 면역 블롯팅 한 결과이다(SE: 짧은 노출, LE: 긴 노출).
도 10은 CRBN-DJ2 상호 작용을 담당하는 도메인의 로컬화에 대한 실험 내용이다. 구체적으로, 도 10a 및 10b는 SH-SY5Y 세포를 Myc-DJ2 및 HA-tagged CRBN 절단물로 일시적으로 동시 형질 감염시키고 24 시간 후 세포 추출물을 α-HA 항체로 면역 침전하여, SDS-PAGE로 분류하고, 항체로 면역 블롯팅 한 결과이다. 도 10c 및 10d는 SH-SY5Y 세포를 HA-CRBN 및 Myc-tagged DJ2 절단물로 일시적으로 동시 형질 감염시키고 24 시간 후, 세포 추출물을 α-HA 항체로 면역 침전하여 웨스턴 블롯을 수행한 결과이다. 도 10e는 ClusPro에 의해 예측된 DJ2-CRBN 상호 작용의 구조 모델을 나타낸 것이다.
도 11은 DJ2의 유비퀴틴화를 담당하는 특정 라이신 잔기의 로컬화와 대한 실험 결과이다. 구체적으로, 도 11a 및 11b는 PhosphositePlus 및 GGbase 데이터베이스를 사용하여 DJ2에서 유비퀴틴화된 실험적으로 보고된 라이신을 확인한 것이다. 도 11c는 SH-SY5Y 세포를 야생형(WT) DJ2 및 다양한 리신 돌연변이체로 형질 감염시켜 K32와 K350은 DJ2의 주요 유비퀴틴화 사이트임을 확인한 것이다.
도 12는 Crbn-/- 및 Crbn+/+의 전체 뇌 용해물에 대해 2D-폴리아크릴아미드 겔 전기영동을 수행한 결과, Crbn+/+ 마우스와 비교하여 Crbn-/- 뇌 용해물의 항산화 수준 증가를 확인한 것이다.
도 13은 Okadaic acid의 주사에 의해 유도된 타우 병리에 대한 CRBN KO의 효과를 확인한 것으로, Crbn-/- 및 Crbn+/+ 마우스의 각 그룹(n = 3)에서 상대 밴드 강도의 밀도 측정 정량화 결과를 그래프로 나타낸 것이다.
도 14는 동일한 뇌 샘플로 타우 키나제 3개의 활성을 분석한 결과이다.
도 15는 CRBN knock-out이 타우 병증에 미치는 영향 및 제조된 펩티드의 CRBN 및 DJ2 결합 억제 효과를 확인한 것이다. 구체적으로, 도 15a는 신경 병증 뮤린 모델에서 APP 플라크의 확인한 것으로, 8개월령의 APP knock-in 마우스로부터 뇌를 제거하고, 해마를 CRBN 및 APP 항체로 16시간 동안 면역 염색하고, 1시간 동안 Alexa-접합된 2차 항체와 함께 인큐베이션한 다음, 60X 렌즈가 장착된 공초점 현미경 하에서 이미지화한 것이다. 도 15b 및 15c는 APP knock-in 및 5XFAD 마우스의 뇌 샘플에서 높은 수준의 CRBN 및 낮은 DJ2를 확인한 것으로, 8개월된 APP knock-in 및 5XFAD 마우스로부터 뇌를 제거하고, 뇌의 절반을 냉동 절편에 사용하고 다른 절반을 웨스턴 블롯 분석에 사용했으며, 해마를 16시간 동안 CRBN 및 DJ2 항체로 면역 염색하고, 1시간 동안 Alexa-접합된 이차 항체와 함께 인큐베이션 하여, 10X 렌즈가 장착된 공초점 현미경 하에서 이미지화 한 것이다. 도 15d는 본 발명의 펩티드 억제제의 아미노산 서열을 나타낸 것이다. 도 15e는 펩티드 억제제의 첨가가 CRBN과 DJ2의 결합을 저해시킨다는 것을 확인한 것으로, SH-SY5Y 세포를 Myc-DJ2 및 FLAG-CRBN으로 일시적으로 동시 형질 감염시키고 24 시간 후, 세포 추출물을 α-Myc 항체로 면역 침전시킨 다음, Myc 및 HA 항체로 면역 블롯팅을 수행한 결과이다(~ 55 kDa의 밴드는 IgG 중쇄를 나타냄).
도 16은 선형(Linear, 서열번호 1) 및 원형(Circular, 서열번호 3) 펩티드 형태를 이용하여 면역침강법으로 CRBN과 DJ2 결합저해능을 확인한 것이다.
도 17a 내지 17d는 서열번호 3의 펩티드를 기준으로 면역침강법으로 CRBN과 DJ2 결합저해능을 확인한 것으로, 아미노산 서열이 무작위적으로 섞어진(Scrambled) 펩티드를 실험대조군으로 추가한 면역침강법 실험결과를 나타낸 것이다(DJ2-peptide는 서열번호 3의 펩티드이며 각 펩티드의 구조는 도 17c에 나타남).
도 18은 서열번호 1의 펩티드 중, 중요 잔기인 4개의 펩티드 시퀀스(Tetra-Peptide sequence, 서열번호 2)와 대조군(scrambled tetra-peptide)의 서열 및 구조를 나타낸 것이다.
도 19a 내지 19c는 서열번호 2로 표시되는 펩티드가 CRBN과 DJ2의 결합을 유의미하게 저해함을 확인한 것이다.
Claims (6)
- 서열번호 1, 서열번호 2 또는 서열번호 3으로 표시되는 CRBN 결합 모티프 아미노산 서열을 포함하는 펩티드.
- 제1항의 펩티드를 포함하는, 알츠하이머 병의 예방 또는 치료용 약학적 조성물.
- 제2항에 있어서, 상기 알츠하이머 병은 타우(Tau) 인산화에 의한 것인, 약학적 조성물.
- 제1항의 펩티드를 포함하는, 알츠하이머 병의 예방 또는 개선용 식품 조성물.
- 제4항에 있어서, 상기 알츠하이머 병은 타우(Tau) 인산화에 의한 것인, 식품 조성물.
- 하기 단계를 포함하는, 알츠하이머 치료제 스크리닝 방법:
a) 서열번호 1, 서열번호 2 또는 서열번호 3으로 표시되는 CRBN 결합 모티프를 포함하는 펩티드를 합성하는 단계;
b) 상기 a)단계에서 합성된 펩티드가 CRBN의 DJ2 결합부위에 결합하여 CRBN와 DJ2의 결합을 저해할 수 있는지 분석하는 단계 및
c) 상기 b)단계에서 합성된 펩티드가 CRBN와 DJ2의 결합을 저해하는 경우 알츠하이머 병 치료제로 판정하는 단계.
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