KR101048415B1 - 마우스 신경아세포종 세포의 내인성 프리온 단백질의 발현을 억제하는 siRNA 및 이를 이용한 소해면상뇌증 특이적인 세포 모델 - Google Patents
마우스 신경아세포종 세포의 내인성 프리온 단백질의 발현을 억제하는 siRNA 및 이를 이용한 소해면상뇌증 특이적인 세포 모델 Download PDFInfo
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Abstract
본 발명은 BSE의 병원성 기작이나 분자세포생물학적 연구의 기본적인 수단으로 사용되어 질병에 대한 이해를 돕고, 이를 바탕으로 BSE 조기진단을 위한 새로운 기법의 개발이나 예방과 치료를 위한 바이오마커 개발의 가능성을 높여 줄 것이다.
Description
siRNA | 시작 | 뉴클레오타이드 염기서열 ( 5′- 3′) | 끝 | 사이즈 |
서열번호1 | 182 | GGCCCTCTTTGTGACTATGTGGACT | 206 | 25mer |
서열번호2 | 819 | CAGGCCTATTACGACGGGAGAAGAT | 843 | 25mer |
도 2는 삽입된 소 프리온 유전자의 전사를 확인한 RT-PCR 결과이다. Lane 1번은 100bp size marker, lane 2번과 3번은 소 프리온 유전자가 삽입된 세포 클론, 4번은 벡터만 삽입된 세포 클론, 5번은 N2a 음성 대조군, 6번은 소 프리온 유전자가 삽입된 벡터로 양성 대조군, 7번은 음성 대조군이다. (가)는 RT-PCR이고 (나)는 역전사 효소 없이 DNA 중합효소만 첨가된 실험군이다.
도 3은 삽입된 소 프리온 유전자의 단백질 발현을 확인하기 위한 Western blot 결과이다. (가)는 프리온 단백질에 특이적인 단클론 항체인 3F10과 (위) GAPDH에 특이적인 다클론 항체를 (아래) 이용하여 Western blot을 실시하였다. (나)는 densitometry를 이용하여 Western blot 를 평가한 결과이다. N2a는 소 프리온 유전자를 삽입하지 않은 세포이고 NbP는 N2a 세포에 소 프리온 유전자를 삽입한 세포이다.
도 4는 내인성 마우스 프리온 유전자 (Genebank accession No. NM_011170, 서열번호 3)의 발현을 억제하기 위해 디자인된 siRNA의 표적 염기서열을 표로 나타낸 것이다. 소 프리온 유전자 (Genebank accession No.AF517842, 서열번호 4) 염기 서열과 alignment를 실시하여 상동관계 (homology) 적은 염기서열을 표적 부위로 선발하였다. siRNA 1번 염기서열은 Genebank accession 번호 NM_011170인 마우스 프리온 유전자의 182부터 206 뉴클레오타이드를 표적화 (targeting)하고 siRNA 2번 염기서열은 819부터 843 뉴클레오타이드를 표적화한다.
도 5는 디자인된 siRNA에 의한 마우스 프리온 유전자의 전사 억제 정도를 확인하기 위한 real-time RT-PCR 결과이다. N2a 세포를 서로 다른 농도의 서열 번호 1로 표시되는 siRNA (위)과 서열 번호 2로 표시되는 siRNA(아래)을 트렌스펙션 (transfection)한 후, 마우스 프리온 유전자의 전사 정도를 나타낸 것이다.
도 6은 디자인된 서열 번호 1로 표시되는 siRNA과 서열 번호 2로 표시되는 siRNA에 의한 마우스 프리온 유전자의 전사 억제 정도를 확인하기 위한 Western blot 결과이다. (가)는 프리온 단백질에 특이적인 단클론 항체인 3F10과 (위) GAPDH에 특이적인 다클론 항체를 (아래) 이용하여 Western blot을 실시한 것을 나타낸다. (나)는 densitometry를 이용하여 Western blot 를 평가한 결과이다. N2a는 소 프리온 유전자를 삽입하지 않은 세포이고 NbP는 N2a 세포에 소 프리온 유전자를 삽입한 세포이다.
도 7은 시간 경과에 따른 프리온 유전자 발현 억제 효율을 확인하기 위한 Western blot 결과이다. NbP 세포주에 100nM 농도의 서열 번호 1로 표시되는 siRNA과 서열 번호 2로 표시되는 siRNA을 각각 주입하고 24, 48, 72, 96시간에 세포를 수거하여 Western blot를 실시한 것을 나타낸다. (가)는 프리온 단백질에 특이적인 단클론 항체인 3F10과 (위) GAPDH에 특이적인 다클론 항체를 (아래) 이용하여 Western blot 결과이며, (나)는 densitometry를 이용하여 Western blot 를 평가한 결과이다.
Claims (8)
- 서열 번호2로 표시되는 siRNA(small interfering RNA).
- 제1항에 있어서, 상기 siRNA는 마우스 프리온 유전자(서열 번호 3, Genebank Accession No.NM_011170)의 발현을 억제하는 것을 특징으로 하는 서열 번호2의 siRNA.
- 소 프리온 유전자(boPrnp ORF, 서열 번호4)를 진핵세포 발현 벡터에 클로닝하는 제1단계;
상기 벡터를 형질감염 운반체를 통하여 마우스 신경 세포주 내로 이식하는 제2단계; 및
상기 마우스 신경 세포주에 서열번호 2로 표시되는 siRNA를 도입하여 마우스 프리온 단백질의 발현을 억제하는 제3단계;를 포함하는 것을 특징으로 하는 소해면상뇌증(Bovine Spongiform Encephalopathy)에 특이적인 세포 모델 제조 방법.
- 제3항에 있어서, 상기 마우스 신경 세포주는 N2a (mouse neuroblastoma)인 것을 특징으로 하는 방법.
- 제3항에 있어서, 상기 마우스 신경 세포주는 50 passage 이하의 세포임을 특징으로 하는 방법.
- 제3항에 있어서, 상기 siRNA의 농도는 20~400nM 인 것을 특징으로 하는 방법.
- 제3항에 있어서, 상기 siRNA의 도입은 트랜스펙션 (transfection)에 의함을 특징으로 하는 방법.
- 제3항 내지 제7항 중 어느 한 항의 방법에 의하여 제조된 소해면상뇌증에 특이적인 세포모델.
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