国际口腔医学杂志
國際口腔醫學雜誌
국제구강의학잡지
JOURNAL OF INTERNATIONAL STOMATOLOGY
2014年
6期
716-719
,共4页
微小RNA%干细胞%分化%程序性细胞死亡%调控机制
微小RNA%榦細胞%分化%程序性細胞死亡%調控機製
미소RNA%간세포%분화%정서성세포사망%조공궤제
microRNA21%stem cell%differentiation%apoptosis%regulatory mechanism
微小RNA(miRNA)参与早期胚胎发生以及细胞增殖和分化、细胞生存和程序性死亡、细胞代谢和能量平衡等一系列重要的生命过程。其中,miRNA21通过调节转化生长因子(TGF)β-Smad信号转导通路促进间质干细胞(MSC)成脂分化和抑制人脂肪源干细胞增殖。骨形态发生蛋白(BMP)受体(BMPR)2为BMP9诱导干细胞成骨分化所必需,而BMPR2是miRNA21的作用标靶,即miRNA21与干细胞成骨分化相关。在MSC分化过程中, miRNA21通过抑制萌芽(SPRY)1和SPRY2蛋白表达,调节细胞外信号调节激酶-促丝裂原激活蛋白激酶信号转导通路活性的大小和持续时间,增加MSC的分化潜能。miRNA21过表达可以促进低氧或无血清条件下MSC的生存,而下调miRNA21则会加快MSC程序性死亡。明确miRNA21的生物学功能及其对干细胞分化的调控机制,旨在为干细胞在组织工程技术和疾病防治等方面的应用奠定依据。
微小RNA(miRNA)參與早期胚胎髮生以及細胞增殖和分化、細胞生存和程序性死亡、細胞代謝和能量平衡等一繫列重要的生命過程。其中,miRNA21通過調節轉化生長因子(TGF)β-Smad信號轉導通路促進間質榦細胞(MSC)成脂分化和抑製人脂肪源榦細胞增殖。骨形態髮生蛋白(BMP)受體(BMPR)2為BMP9誘導榦細胞成骨分化所必需,而BMPR2是miRNA21的作用標靶,即miRNA21與榦細胞成骨分化相關。在MSC分化過程中, miRNA21通過抑製萌芽(SPRY)1和SPRY2蛋白錶達,調節細胞外信號調節激酶-促絲裂原激活蛋白激酶信號轉導通路活性的大小和持續時間,增加MSC的分化潛能。miRNA21過錶達可以促進低氧或無血清條件下MSC的生存,而下調miRNA21則會加快MSC程序性死亡。明確miRNA21的生物學功能及其對榦細胞分化的調控機製,旨在為榦細胞在組織工程技術和疾病防治等方麵的應用奠定依據。
미소RNA(miRNA)삼여조기배태발생이급세포증식화분화、세포생존화정서성사망、세포대사화능량평형등일계렬중요적생명과정。기중,miRNA21통과조절전화생장인자(TGF)β-Smad신호전도통로촉진간질간세포(MSC)성지분화화억제인지방원간세포증식。골형태발생단백(BMP)수체(BMPR)2위BMP9유도간세포성골분화소필수,이BMPR2시miRNA21적작용표파,즉miRNA21여간세포성골분화상관。재MSC분화과정중, miRNA21통과억제맹아(SPRY)1화SPRY2단백표체,조절세포외신호조절격매-촉사렬원격활단백격매신호전도통로활성적대소화지속시간,증가MSC적분화잠능。miRNA21과표체가이촉진저양혹무혈청조건하MSC적생존,이하조miRNA21칙회가쾌MSC정서성사망。명학miRNA21적생물학공능급기대간세포분화적조공궤제,지재위간세포재조직공정기술화질병방치등방면적응용전정의거。
MicroRNA(miRNA)?plays?a?role?in?the?progresses?of?early?embryogenesis?and?proliferation,?differentiation,?survival,?apoptosis,?metabolism,?and?energy?balance?of?cell.?MiRNA21?promotes?adipogenic?differentiation?of?mesenchy-mal?stem?cell(MSC)?and?inhibits?the?proliferation?of?human?adipose-derived?stem?cell?by?transforming?the?growth?factor(TGF)β-Smad?pathway.?Bone?morphogenetic?protein(BMP)?receptor(BMPR)2?is?a?target?of?miRNA21,?which?is?necessary?for?BMP9-induced?osteogenesis.?This?finding?indicates?that?miRNA21?is?related?to?the?osteogenic?differentiation?of?stem?cell.?During?the?differentiation?of?MSC,?miRNA21?down?regulates?the?expression?of?sprout(SPRY)1?and?SPRY2?to?mediate?the?activation?and?duration?of?extracellular?signal-regulated?kinase-mitogen-activated?protein?kinase?pathway?and?improves?the?differentiation?potential?of?MSC.?The?overexpression?of?miRNA21?can?also?enhance?the?survival?of?MSC?under?hypoxia?or?serum-free?condition,?but?the?down?regulation?of?miRNA21?accelerates?cell?apoptosis.?Thus,?biological?function?and?regulatory?mechanism?during?the?differentiation?of?miRNA21?stem?cell?can?lay?basis?for?the?usage?of?stem?cell?in?tissue?engineering?and?the?prevention?and?treatment?of?diseases.