KR101552048B1 - 약 유도 시스템을 이용해 혈액세포를 도파민 신경세포로 직접교차분화 시키는 방법 - Google Patents
약 유도 시스템을 이용해 혈액세포를 도파민 신경세포로 직접교차분화 시키는 방법 Download PDFInfo
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Abstract
Description
도 2는 본 발명의 구체예에 따른 모든 배아 줄기세포 콜로니에서 발현되는 배아 줄기세포 다능성(pluripotency) 마커 유전자를 나타낸다. Oct4, Nanog, 및 Sox2를 포함하는 마커 유전자를 발현되는 반면, TH 및 Tuj1를 포함하는 신경 유전자는 발현되지 않는다.
도 3은 본 발명의 구체예에 따라, 약(독시사이클린, Dox)을 7일동안 처리하여 마우스 배아 섬유아세포로부터 도파민 신경세포로 직접교차분화 한 것에 대해 도파민신경세포 마커를 이용하여 확인한 도이다 (J1, J2: Pitx3-eGFP-TRE-4F 마우스 배아 섬유아세포 콜로니; DOX-(7D): 약 미처리군; DOX+(7D): 7일간 약 처리군; DAPI(4',6-diamidino-2-phenylindole): 형광염색제; TuJ1, TH, DAT: 신경세포 유전자 마커)
도 4는 본 발명의 구체예에 따라, 약(Dox)을 7일 동한 처리한 후 도파민신경세포 마커 TH(+) 세포가 증가함을 보여주는 도이다.
도 5는 본 발명의 구체예에 따라, 전기생리학 연구를 이용하여 유도 도파민 신경세포의 활동전위를 분석하여 본 발명의 유도된 도파민 신경세포가 신경세포임을 증명한 도이다(우: 전류 주입량이 증가함에 따라 유도되는 반복활동전위(n=12); 오른쪽 아래는 전류 주입(-20pA 내지 +120pA)을 나타낸다; 좌: 빠른 내부 소듐 전류 및 느린 불활성 외부 포타슘 전류로 유발된 전압 의존성 막 전류 및 탈분극 스텝 전압).
도 6은 본 발명의 구체예에 따라, 약(Dox)을 처리한 후, 날짜 별(3, 7 및 14일)로 유도 도파민 신경세포의 세포막 특성을 초기(primary) 도파민 신경세포와 비교 분석한 도이다(AP: 활동 전위; Rin: 세포막 입력 저항; RMP: 휴지막 전위) .
도 7은 본 발명의 구체예에 따라, 유도 도파민 신경세포에서 도파민 신경세포 유전자 마커(TH, AADC, DAT)의 발현을 정량적 RT-PCR을 통해 분석한 도이다(Fb: 섬유아세포; iDA : 유도 도파민 신경세포; MB: 실제 마우스 중뇌(신생자 1일령)) .
도8은 본 발명의 구체예에 따라, Pitx3-eGFP 마우스 배아 섬유아세포로부터 직접교차분화에 의해 유도된 eGFP의 발현을 FACS 분석으로 나타낸 도이다.
도 9는 본 발명의 구체예에 따라, 직접 바이러스 주입을 통한 직접 교차분화(Direct infection)와 본 발명의 약 유도 신경 개발 시스템(Inducible system)을 사용한 직접교차분화의 효율성에 대한 실험적 가변성을 비교한 도이다.
도 10은 본 발명의 구체예에 따라, 약(Dox)에 의존적인 유도 신경 개발 시스템을 이용해 약을 처리하는 기간에 따른 리프로그래밍 전략을 나타낸 도이다(+Dox: 중단 없이 약을 계속 처리한 경우: -Dox: 기간별로 약 처리를 중단한 경우).
도 11은 본 발명의 구체예에 따라, 약(Dox) 처리 날짜(0일부터 20일까지)에 따라서 TH(+) 신경세포의 수를 보여주는 도이다.
도 12는 본 발명의 구체예에 따라, 약(Dox) 처리 1일, 2일, 3일 후 Dox를 제거했을 때, 날짜 별로 TH(+)신경세포의 수를 나타낸 도이다.
도 13은 본 발명의 구체예에 따라, 유도 신경 개발 시스템(A drug inducible system)을 이용하여 약(Dox)을 처리하거나 처리하지 않았을 때, 혈액세포(monocyte)로부터 도파민 신경세포로 직접교차분화 했는지 여부를 도파민 신경세포 마커(TH, TuJ1)를 이용하여 확인한 도이다.
도 14는 본 발명의 구체예에 따라, 직접교차분화 도파민 신경세포와 혈액세포(monocyte)를 이용한 유도 신경 개발 시스템 신경세포를 도파민 신경세포 마커 발현 정도를 비교하여 나타낸 히트맵(Heat map)이다. 히트맵은 상대적인 유전자 발현을 나타낸다(Monocytes: 혈액세포; iDA : 유도 도파민 신경세포; Primary DA: 실제 초기 도파민).
도 15는 본 발명의 구체예에 따른 혈액세포를 이용한 유도 신경 개발 시스템으로 유발된 TH+ 유도 도파민 신경세포의 수를 나타낸 도이다.
도 16은 본 발명의 구체예에 따라, 혈액세포로부터 유도된 도파민 신경세포의 신경돌기 길이를 나타낸 도이다.
도 17은 혈액세포(blood cells)와 혈액세포를 직접교차분화하여 유도한 도파민 신경세포(iDA)에서 방출되는 도파민 레벨을 HPLC 정량으로 비교한 도이다.
도 18은 혈액세포로부터 유도된 도파민 신경세포의 활동전위를 보여주는 도이다.
도 19는 혈액세포로부터 유도된 도파민 신경세포에서 테트로도톡신(tetrodotoxin, TTX)의 영향을 활동전위로 보여주는 도이다.
도 20은 혈액세포로부터 유도된 도파민 신경세포 세포막의 특성을 실제 도파민 신경세포와 비교하여 나타낸 도이다 (iDA : 유도 도파민 신경세포; Primary DA: 실제 초기 도파민; AP: 활동 전위; RMP: 휴지막 전위).
Claims (7)
- 전사인자 Ascl1, Pitx3, Nurr1 및 Lmx1a가 형질도입된 배아 줄기세포로부터 키메라 동물을 제작하는 단계;
상기 키메라 동물에서 혈액세포를 분리하는 단계; 및
상기 혈액세포를 독시사이클린(Doxycycline)이 함유된 배지에서 배양하여 도파민 신경세포를 유도하는 단계;
를 포함하는 혈액세포를 도파민 신경세포로 직접교차분화시키는 방법으로서,
상기 키메라 동물은 마우스인 것을 특징으로 하고, 그리고
상기 혈액세포에 형질도입된 Ascl1, Pitx3, Nurr1 및 Lmx1a는 독시사이클린에 의해 발현되는 것을 특징으로 하는 혈액세포를 도파민 신경세포로 직접교차분화시키는 방법.
- 제 1항에 있어서,
상기 혈액세포는 말초혈액으로부터 분리한 것을 특징으로 하는 방법.
- 삭제
- 제 1항에 있어서,
상기 독시사이클린의 함유량은 0.1 내지 10 ug/ml 인 것을 특징으로 하는 방법.
- 제 1항에 있어서,
상기 독시사이클린이 함유된 배지에서의 체세포 배양은 1 내지 30일 동안 이루어지는 것을 특징으로 하는 방법.
- 전사인자 Ascl1, Pitx3, Nurr1 및 Lmx1a가 형질도입된 혈액세포 및 독시사이클린을 포함하는 것을 특징으로 하는 혈액세포를 도파민 신경세포로 직접교차분화시키기 위한 조성물로서,
상기 혈액세포에 형질도입된 Ascl1, Pitx3, Nurr1 및 Lmx1a는 독시사이클린에 의해 발현되는 것을 특징으로 하는 혈액세포를 도파민 신경세포로 직접교차분화시키기 위한 조성물.
- 제6항에 있어서,
상기 혈액세포는 전사인자 Ascl1, Pitx3, Nurr1 및 Lmx1a가 형질도입된 배아 줄기세포로부터 제작한 키메라 동물에서 분리된 것을 특징으로 하고, 그리고
상기 키메라 동물은 마우스인 것을 특징으로 하는 조성물.
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