KR102191781B1 - 혈관내피세포화를 조절하는 microRNAs 및 그의 용도 - Google Patents
혈관내피세포화를 조절하는 microRNAs 및 그의 용도 Download PDFInfo
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- KR102191781B1 KR102191781B1 KR1020130074564A KR20130074564A KR102191781B1 KR 102191781 B1 KR102191781 B1 KR 102191781B1 KR 1020130074564 A KR1020130074564 A KR 1020130074564A KR 20130074564 A KR20130074564 A KR 20130074564A KR 102191781 B1 KR102191781 B1 KR 102191781B1
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Abstract
Description
도 2는 RT-PCR에 의한 다능성 기질세포, 혈액모세포, 혈관내피전구세포, 내피세포에서의 Sca-1, c-Kit, vWF, CD31 및 VE-cadherin의 mRNA 레벨을 보여준다.
도 3은 경동맥 풍선 손상 모델에서, 혈관내피전구세포와 내피세포의 분포는 증가하는 반면, 다능성 기질세포의 분포는 감소함을 보여주는 유세포 분석 결과이다.
도 4은 다능성 기질세포, 혈액모세포, 혈관내피전구세포, 혈관내피세포에서의 다양한 miRNA의 상대적인 발현 레벨을 real-time PCR로 분석한 결과를 보여준다.
도 5는 TargetScan 결과와 real-time RT-PCR을 통한 microRNA 발현 양상을 기초로 다능성 기질세포의 운명에 관련된 miRNA를 벤다이어그램으로 정리한 결과를 보여준다.
도 6은 VEGF에 의한 내피세포로의 분화 유도를 보여주는 면역형광분석법(도 6A) 및 RT-PCR(도 6B) 의 결과를 나타낸다.
도 7은 다능성 기질세포에 VEGF 처리시 VEGF 관련 신호전달 경로 및 내피세포 마커의 발현 변화를 보여주는 웨스턴블롯(도 7A) 및 RT-PCR(도 7B) 결과이다.
도 8은 VEGF 처리시 내피세포 특이적 마커와 다능성 기질세포 특이적 마커의 mRNA 레벨 변화를 보여주는 RT-PCR 결과를 나타낸다.
도 9는 PDGF는 MEK, ERK, AKT의 인산화를 유도하여 활성화시키는 반면, VEGF는 이들 단백질의 활성을 저해함을 보여주는 웨스턴 블롯 결과를 나타낸다.
도 10은 PDGFR을 타겟하는 miR-26a와 -29b가 PDGF에 의한 MEK와 ERK의 활성을 저해함을 보여주는 웨스턴 블롯의 결과를 나타낸다.
도 11은 miR-26a와 -29b에 의한 MEK와 ERK의 활성 저해가 세포 사멸과는 관련이 없음을 보여주는 homogeneous caspase-3 assay의 결과를 나타낸다.
도 12는 CD133을 타겟하는 miR-29b, -30a, -542가 CD133의 신호전달 단백질인 AKT와 p38의 인산화를 억제함을 보여주는 웨스턴 블롯의 결과를 나타낸다.
도 13은 miR-26a, -29b, -30a, -542의 트랜스펙션에 따른 내피세포 특이적 마커와 다능성 기질세포 특이적 마커의 발현 변화를 보여주는 RT-PCR 결과를 나타낸다.
도 14는 miR-26a, -29b, -30a, -542의 처리에 따른 세포면역염색법의 결과를 보여준다.
도 15는 microRNA에 의해 내피세포로 분화유도된 다능성 기질세포의 모세관 형성과 이동을 관찰한 결과를 보여준다.
도 16은 본 발명에 따른 microRNA에 의한 다능성 기질세포의 운명 조절을 모식도로 나타낸 것이다.
세포 유지 | ALK | miR-96/507/1271 miR-133abc |
BMPRII | miR-19ab miR-21/590-5p miR-130ac/301ab/301b/301b3p/454/721/4295/3666 miR-17/17-5p/20ab/20b-5p/93/106ab/427/518a-3p/519d miR-25/32/92abc/363/363-3p/367 miR-99ab/100 miR-216b/216b-5p miR-153 miR-181abcd/4262 miR-26ab/1297/4465 | |
CD133 | miR-142-3p miR-29abcd | |
PDGFR | miR-34ac/34bc-5p/449abc/449c-5p miR-219-5p/508/508-3p/4782-3p miR-182 miR-17/17-5p/20ab/20b-5p/93/106ab/427/518a-3p/519d miR-141/200a miR-24/24ab/24-3p miR-27abc/27a-3p miR-140/140-5p/876-3p/1244 miR-218/218a miR-130ac/301ab/301b/301b3p/454/721/4295/3666 miR-181abcd/4262 miR-33ab/33-5p miR-26ab/1297/4465 miR-29abcd | |
세포 분화 | CD45 | miR-141/200a miR-129-5p/129ab-5p miR-133abc miR-124/124ab/506 |
VEGFR1 | miR-204/204b/211 miR-338/338-3p miR-96/507/1271 miR-218/218a miR-182 miR-144 miR-22/22-3p miR-139-5p miR-133abc miR-124/124ab/506 | |
Nucleostenin | miR-143/1721/4770 miR-374ab |
전사 인자 | Brachyury | miR-219-5p/508/508-3p/4782-3p miR-217 miR-9/9ab |
GATA -1 | miR-9/9ab miR-149 | |
RUNX1 | miR-18ab/4735-3p miR-27abc/27a-3p miR-141/200a miR-22/22-3p miR-184 miR-15abc/16/16abc/195/322/424/497/1907 miR-23abc/23b-3p miR-214/761/3619-5p miR-1ab/206/613 miR-9/9ab | |
Cell mobilization | CD309 | miR-455-5p miR-221/222/222ab/1928 miR-200bc/429/548a miR-15abc/16/16abc/195/322/424/497/1907 |
CD117 | miR-221/222/222ab/1928 miR-34ac/34bc5p/449abc/449c-5p miR-137/137ab miR-193/193b/193a-3p | |
세포 이동 | CD31 | miR-210 miR-26ab/1297/4465 miR-27abc/27a-3p |
CD324 | miR-217 let-7/98/4458/4500 miR-23abc/23b-3p | |
세포 발달 | EphB4 | miR-133abc miR-124/124ab/506 |
혈관신생 | Tie -2 | miR-150/5127 miR-139-5p miR-144 miR-31 miR-214/761/3619-5p |
세포 이동 | CD93 | miR -99 ab /100 miR -29 abcd miR -138/138 ab miR -27 abc /27a-3p miR -23 abc /23b-3p miR -214/761/3619-5p |
CD105 | miR -214/761/3619-5p miR -150/5127 miR -370 miR -326/330/330-5p | |
조직 리모델링 | MMP -9 | miR -491-5p miR -149 |
Cell homing | CD184 | miR -338/338-3p miR -204/204b/211 miR -1 ab /206/613 miR -9/9 ab |
아폽토시스 조절 | TNF RI / II | miR -214/761/3619-5p miR -24/24 ab /24-3p |
Cell recruit | CD62P | miR -9/9 ab miR -26 ab /1297/4465 miR -202-3p |
세포 부착 | CD106 | miR-145 miR-181abcd/4262 miR-202-3p miR-346 |
CD112 | miR-24/24ab/24-3p miR-124/124ab/506 miR-214/761/3619-5p miR-15abc/16/16abc/195/322/424/497/1907 | |
CD144 | miR-125a-5p/125b5p/351/670/4319 miR-101/101ab miR-338/338-3p miR-27abc/27a-3p | |
CD146 | miR-125a-5p/125b-5p/351/670/4319 miR-129-5p/129ab-5p | |
CD160 | miR-874 miR-653 | |
CD248 | miR-140/140-5p/876-3p/1244 | |
CD54 | miR-130ac/301ab/301b/301b-3p/454/721/4295/3666 miR-223 miR-383 miR-141/200a | |
CD62E | miR-141/200a miR-204/204b/211 miR-182 miR-7/7ab | |
vWF | miR-24/24ab/24-3p miR-214/761/3619-5p miR-15abc/16/16abc/195/322/424/497/1907 | |
전사 인자 | CD106 | miR-145 miR-181abcd/4262 miR-202-3p miR-346 |
세포 발달, 활성화, growth motility | CD151 | miR-124/124ab/506 miR-22/22-3p miR-34ac/34bc-5p/449abc/449c-5p miR-214/761/3619-5p miR-7/7ab miR-370 |
TargetScan 결과를 바탕으로, target score가 높은 microRNA를 선별하여, 각 세포에서의 발현양상을 확인하였다. 도 4에서 볼 수 있는 바와 같이, miR-17, -21, -23b, -29b는 내피세포에서 발현이 높았고, miR-15b, -144, -145, -329는 다능성 기질세포에서 발현이 높았다.
TargetScan 결과와 real-time RT-PCR을 통한 microRNA 발현 양상을 바탕으로, 벤다이어 그램을 작성하였다. 도 5에서 볼 수 있는 바와 같이, 다능성 기질세포의 maintenance에 관여하는 단백질을 타겟하는 microRNA (붉은색 원), 내피세포 부착에 관여하는 단백질을 타겟하는 microRNA (파란색 원), 다능성 기질세포의 분화에 관여하는 단백질을 타겟하는 microRNA (초록색 원)로 정리하였고, 그 중에서 다능성 기질세포의 내피세포로의 분화에 관여할 것으로 예상되는 microRNA (옅은 핑크색 부분)와 다능성 기질세포의 maintenance를 유도할 것으로 예상되는 microRNA (옅은 녹색 부분)를 선택하였다. 선택된 microRNA는 추후 실험을 통해 다능성 기질세포의 maintenance와 내피세포로의 분화에 관여하는지 확인하였다.
실시예 2: 내피세포 회복기작과 다능성 기질세포의 maintenance 에 관여하는 miRNA 의 동정
VEGF (vascular endothelial growth factor)는 줄기세포의 내피세포로의 분화를 유도하는 대표적인 사이토카인으로 알려져 있다. MSCs에 VEGF (50 ng/ml)를 처리하고, 16일 동안 분화 유도시, 도 6에서 볼 수 있는 바와 같이, 시간에 따라 다능성 기질세포 특이적 마커인 CD45와 c-Kit의 발현은 점점 감소하고 내피세포 특이적 마커인 CD31, vWF, VE-cadherin의 발현은 증가하는 것을 확인할 수 있었다.
다능성 기질세포의 VEGF에 의한 내피세포로의 분화 억제는 다능성 기질세포의 미분화 상태 유지와 연관이 있다. VEGF에 의한 내피세포로의 분화는, phospholipase C (PLC) 인산화를 통한 PKC-PI3K-AKT-HDAC3-p53-p21 pathway를 통해 일어난다. HDAC 저해제인 trichostatin A (TSA) 또는 HDAC3 siRNA를 통한 HDAC3의 활성저해는 VEGF에 의한 내피세포 마커의 발현을 억제하고, 반대로 HDAC3를 과발현시키면 내피세포 마커의 발현이 증가한다. 다능성 기질세포에 VEGF (50 ng/ml)를 처리하여 내피세포로 분화를 유도하면, PLC, PI3K, AKT 인산화가 높아지고, HDAC3의 활성을 통한 p21의 활성도 증가한다. 이러한 VEGF 수용체를 타겟으로 하는 miR-15, -144, -145, -329를 트랜스펙션하면, VEGF에 의한 신호전달기작이 저해되었다 (도 7).
또한, 도 8에서 볼 수 있는 바와 같이, 내피세포 특이적 마커인 CD31의 mRNA 발현이 증가하지 않았고 다능성 기질세포특이적 마커인 Sca-1의 mRNA 레벨은 복구되었다. 따라서 VEGFR를 타겟하는 microRNA는 VEGF에 의한 다능성 기질세포의 내피세포 분화와 다능성 기질세포의 미분화 상태 유지를 조절함을 알 수 있다.
실시예 3: 다능성 기질세포의 내피세포로의 분화에 관여하는 microRNA 의 동정
다음으로, MSC 유지에 관여하는 PDGFR (platelet-derived growth factor receptor), 및 CD133 단백질을 타겟하는 microRNA가 다능성 기질세포의 내피세포로의 분화에 영향을 주는지 확인하였다. 줄기세포의 자가증식은 분화관련 신호전달이 저해되어야 하고, 반대로 줄기세포의 분화는 자가증식관련 신호전달이 저해되어야 일어난다. 다능성 기질세포의 미분화 상태 유지는 PDGF-MAPK cascades, BMP-Smad1/5/8 phosphorylation, CD133-p38-MAPK-PI3K/AKT pathway의 신호전달을 통해 이루어진다. AKT 인산화와 ERK 인산화는 MSC의 유지와 성장에 중요한 역할을 한다. PDGF는 MEK, ERK, AKT의 인산화를 유도해서 활성화시키는데, 도 9에서 볼 수 있는 바와 같이, VEGF는 세 단백질의 활성을 저해한다.
또한, 도 10에서 볼 수 있는 바와 같이, PDGFR을 타겟하는 miR-17, -26a, -29b, -219 중에서, miR-26a와 -29b가 PDGF에 의한 MEK와 ERK의 활성을 저해하였다.
MEK와 ERK의 활성 저해는 세포 사멸과 연관이 있지만, 도 11에서 확인할 수 있는 바와 같이, 본 실험에서 miR-26a와 -29b에 의한 MEK와 ERK의 활성 저해는 다능성 기질세포의 미분화 상태 유지 관련 신호전달을 억제할 뿐 세포 사멸과는 관련이 없었다.
한편, CD133 (prominin-1)은 줄기세포의 특이적 마커로, 줄기세포를 미분화상태로 유지하는데 중요한 역할을 한다. 도 12에서 볼 수 있는 바와 같이, CD133을 타겟하는 miR-29b, -30a, -542는 CD133의 신호전달 단백질인 AKT와 p38의 인산화를 억제하였다. PDGFR와 BMPR을 타겟하는 microRNA와 마찬가지로, CD133을 타겟하는 microRNA는 다능성 기질세포의 미분화 상태 유지를 저해한다.
PDGFR와 CD133을 타겟하는 microRNA 중에서 신호전달을 저해한 miR-26a, -29b, -30a, -542를 선택하여 다능성 기질세포의 미분화 상태 유지의 억제가 다능성 기질세포의 내피세포로의 분화에 영향을 주는지 확인하였다. 4개의 microRNA를 트랜스펙션하고 16일 동안 배양한 다능성 기질세포에서 내피세포 특이적 마커인 CD31의 발현은 증가하였고, 다능성 기질세포 마커인 Sca-1의 발현은 감소하는 경향을 보였다 (도 13).
또한, 도 14의 세포면역염색법 (immunocytochemical staining) 결과에서는 다능성 기질세포 양성 마커인 CD45의 발현은 낮아졌고, 내피세포 특이적 마커인 CD31의 발현은 증가한 것을 확인하였다. 이러한 결과를 통해, 다능성 기질세포의 미분화 상태 유지 신호전달에 관여하는 단백질을 저해하는 microRNA는 다른 외부의 자극인자 없이 다능성 기질세포의 내피세포로의 분화를 유도한다는 것을 확인할 수 있었다.
마지막으로, microRNA에 의해 내피세포로 분화유도된 다능성 기질세포가 내피세포 특이적 캐릭터인 모세관 형성과 이동을 보이는지 알아보았다. 그 결과, 도 15에서 볼 수 있는 바와 같이, 4개의 microRNA 중에서 miR-26a와 -29b로 분화 유도한 다능성 기질세포에서 모세관 형성과 이동이 3배 이상 증가한 것을 확인할 수 있었다.
따라서, miR-26a와 -29b는 다능성 기질세포의 미분화 상태 유지에 관여하는 신호전달을 억제하여, 내피세포의 특이적 캐릭터인 모세관 형성과 이동 특성을 갖는 내피세포로 다능성 기질세포를 분화시킨다.
Claims (16)
2) 상기 시험물질에 의한 상기 miRNA의 발현 변화를 분석하는 단계,
3) 상기 시험물질이 상기 miRNA의 발현을 증가시키면 다능성 기질세포의 혈관내피세포로의 분화를 유도하는 약물로 판단하는 것을 포함하는 다능성 기질세포의 혈관내피세포로의 분화를 유도하는 약물의 스크리닝 방법.
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