体外诱导成人脂肪干细胞向心肌细胞分化的研究

目的 诱导成人脂肪干细胞（ADMSCs）分化为心肌细胞,为心肌再生提供良好的干细胞来源.方法 培养人脂肪来源的间充质干细胞,采用10 μmol/L的5-氮杂胞苷（5-Aza）诱导ADM-SCs 24 h,分别在第7、14、21天用免疫细胞荧光染色鉴定心肌细胞α-横纹肌肌动蛋白、MHC表达,PT-PCR法检测心肌相关基因心房钠尿肽（ANP）的表达.结果 10μmol/L 5-Aza诱导后7 d进行免疫细胞荧光染色,未见有α-横纹肌和MHC表达.14 d少量细胞α-横纹肌和MHC阳性表达,21 d表达α-横纹肌和MHC的细胞数量增多,并且RT-PCR结果显示ANP呈阳性表达.结论 经过5-Aza的诱导可以分化为心肌细胞,为心肌再生提供了更多的选择.

Study on biological characteristics of adult adipose-derived mesenchymal stem cells and its differentiation into cardiomyocytes in vitro

Objective To induce adipose-derived mesenchymal stem cells (ADMSCs) differentiation into cardiomyocytes, so as to provide stem cells for myocardial regeneration.Method ADMSCs were isolated and cultured from adult adipose tissue in vitro.They were induced with 10μmol/L 5-azacytidine (5Aza) for 24h.At the 7th, 14th, 21st days after induction, the expression of α-sarcomeric actin, and myosin heavy chain were repeatedly detected by immunocytochemistry.The expression of ANP was detected by RT-PCR.Results At the 7th day after induction, there was no expression of α-sarcomeric actin and MHC.At the 14th day, there was a little expression of α-sarcomeric actin and MHC that could be seen in cells.At the 21st day, there was increased expression of α-sarcomeric and MHC, and the expression of ANP was positive results detected by RT-PCR.Conclusions 5-Aza can induced ADMSCs to differentiate into cardiomyocytes.ADMSCs might be a potential source of cell transplantation for myocardial.