KR20110088260A - 인간 배아줄기세포를 심근세포로 분화 유도하는 방법 - Google Patents
인간 배아줄기세포를 심근세포로 분화 유도하는 방법 Download PDFInfo
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Abstract
Description
도 2는 분화된 심근세포에서 심장 특이적 표지인자의 발현을 정량적 역전사 중합반응을 이용하여 확인한 결과를 나타낸 것이다. 도 2a는 인간 배아줄기세포 유래 심근세포에서 칼슘 채널 관련 유전자인 HCN1, 2 및 4의 발현 여부를 5일, 10일, 15일 및 20일 등 5일 간격으로 유전자 중합 반응을 이용하여 확인한 결과이다. 도 2b는 인간 배아줄기세포 유래 심근세포에서 중배엽 표지인자 브라키우리와 심장 특이적 표지인자인 Nkx2.5, αMHC, Tbx5 및 GATA4 등의 발현을 분화 후 5일, 10일, 15일 및 20일 등 5일 간격으로 확인하여 분화가 진행됨에 따라 발현이 증가하는 것을 확인한 결과를 그래프로 나타낸 것이다.
도 3a 및 b는 분화된 심근세포에서 심장 특이적 표지인자의 발현을 면역 형광 염색을 이용하여 확인한 결과에 대한 사진이다. 브라키우리 및 표지인자 Nkx2.5, cTn I, αMHC 및 α-엑티닌의 발현을 면역 형광 염색으로 확인하였으며, 미분화 표지인자인 Oct4의 발현이 감소하는 것을 확인한 결과이다.
도 4는 분화된 심근세포에서 심장 특이적 표지인자의 발현을 유세포 분석을이용하여 확인한 결과이다. 분화 3일째의 브라키우리를 발현하는 세포의 비율 및 분화 후 12일과 17일째의 Nkx2.5 및 αMHC를 발현을 분석한 결과를 나타낸다.
도 5는 분화된 심근세포에서 Fluo-4를 이용하여 세포 내 칼슘의 발현을 확인한 결과이다. 분화된 세포 내에서 존재하는 칼슘을 공초점 레이저 현미경을 이용하여 확인한 결과이다.
프라이머 | 서열(5'-3') | 서열번호 | |
RT-PCR |
HCN1 Forward | CGGAAACTGGTGGCTACAAT | 1 |
HCN1 Reverse | TCGAACACTGGCAGTACGAC | 2 | |
HCN2 Forward | CTCCTTCGCACTCTTCAAGG | 3 | |
HCN2 Reverse | AACATCTTGCCCTGGTAACG | 4 | |
HCN4 Forward | GGTGTCCATCAACAACATGG | 5 | |
HCN4 Reverse | TGTACTGCTCCACCTGCTTG | 6 | |
qPCR |
αMHC Forward | TGCTGCAACACCTGGTCCTC | 7 |
αMHC Reverse | AGTGCTTCGTGCCCGATGAC | 8 | |
브라키우리 Forward | TGCTTCCCTGAGACCCAGTT | 9 | |
브라키우리 Reverse | GATCACTTCTTTCCTTTGCATCAAG | 10 | |
GAPDH Forward | AGCCACATCGCTCAGACACC | 11 | |
GAPDH Reverse | GTACTCAGCGCCAGCATC | 12 | |
GATA4 Forward | TTACACGCTGATGGGACTGGAG | 13 | |
GATA4 Reverse | GGGGAACGCAGGGGACAAG | 14 | |
Nkx2.5 Forward | TTGCGCACGGGAGAGTTTGT | 15 | |
Nkx2.5 Reverse | GCCCGACGAGCTCAGTCCCAGTT | 16 | |
TBX Forward | TACCACCACACCCATCAAC | 17 | |
TBX Reverse | ACACCAAGACAGGGACAGAC | 18 |
Claims (12)
- BMP2를 포함하는 무혈청 배지에서 배양하는 단계를 포함하는, 인간 배아줄기세포를 심근세포로 분화 유도하는 방법.
- 제1항에 있어서, 상기 분화는 인간 배아줄기세포를 배아체를 형성시키지 않고 직접 분화를 유도하는 방법에 의해서 수행되는 것인 방법.
- 제1항에 있어서, 상기 BMP2를 포함하는 배지에서 배양하는 단계는 분화 유도 초기에 이루어지는 것인 방법.
- 제3항에 있어서, 상기 BMP2를 포함하는 배지에서 배양하는 단계는 분화 시작 후 1일 내지 5일 동안 배양하는 것인 방법.
- 제1항에 있어서, 상기 BMP2의 농도는 5 ng/ml 내지 25 ng/ml인 방법.
- 제1항에 있어서, 상기 BMP2를 포함하는 배지에서 배양하는 단계를 포함하는 단계 이전에 악티빈 A를 포함하는 배지에서 배양하는 단계를 추가로 포함하는 방법.
- 제6항에 있어서, 상기 악티빈 A를 포함하는 배지에서 배양하는 단계는 분화 시작일부터 1일 동안 이루어진 것인 방법.
- 제7항에 있어서, 상기 악티빈 A의 농도는 50 ng/ml 내지 100 ng/ml인 방법.
- 제1항에 있어서, 상기 분화 유도하는 방법은
(i) 미분화 인간 배아줄기세포의 배양 배지에서 지지세포를 제거하는 단계;
(ii) 상기 (i) 단계에서 수득한 세포를 악티빈 A를 포함하는 배지에서 배양하는 단계;
(iii) 상기 (ii) 단계의 세포를 악티빈 A를 제거하고 BMP2를 포함하는 배지에서 배양하는 단계; 및
(iv) 상기 (iii) 단계의 세포를 BMP2를 제거한 배지에서 배양하는 단계에 의해 이루어진 것인 방법.
- 제1항 내지 제9항 중 어느 한 항의 방법에 의해 제조되며, 하기의 특징을 가지는 심근세포:
(i) 낭포-유사 (cyst-like), 혼합된 모양 (mixed shape), 부유체 (floating) 또는 근육-유사 (muscle-like) 형태를 가짐;
(ii) Nkx2.5, α-MHC, cTn I, HCN1 또는 HCN2를 발현함; 및
(iii) 박동하는 세포임.
- 배양 배지 내에 BMP2를 포함하는, 인간 배아줄기세포를 심근세포로 분화 유도하기 위한 무혈청 배지 조성물.
- 제11항에 있어서, 상기 BMP2의 농도는 5 ng/ml 내지 25 ng/ml인 무혈청 배지 조성물.
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