摘要目的 探讨不同浓度重组人碱性成纤维细胞生长因子(recombinant human basic fibro-blast growth factor,rh-bFGF)对体外培养的人脂肪来源干细胞(human adipose-derived stem cells,hASCs)诱导分化为脂肪细胞的影响,通过实验寻找促进hASCs向脂肪细胞转化的最佳浓度.方法 取健康脂肪抽吸者脂肪混悬液进行分离提取hASCs,进行hASCs的培养、鉴定和成脂诱导分化,并在成脂诱导的细胞中分别加入0 ng/ml rh-bFGF作为对照组,加入10、20、40 ng/ml外源性rh-bFGF作为实验组.MTT比色法检测成脂细胞的增殖速率,油红O染色定性分析新形成脂肪细胞的时间,利用Western印迹法检测成熟脂滴表面标记蛋白CIDEC的表达.结果 添加40ng/mlrh-bFGF的脂滴形成平均时间为(11.5±1.9)h,检测细胞增殖的吸光度值平均为0.52±0.10,10、20、40 ng/mlrh-bFGF对细胞的增殖均有促进作用,尤以40ng/ml浓度最为明显,40ng/mlrh-bFGF成熟脂滴表面蛋白CIDEC的表达量高于其他组.结论 在hASCs成脂诱导剂中添加rh-bFGF能有效促进成脂细胞的增殖速率,加速hASCs向脂肪细胞的分化,其中以40ng/ml rh-bFGF为最佳浓度.

abstractsObjective To study the effect of the exogenous recombinant human FGF-basic with different concentrations upon inducing human adipose-derived stem cells (hASCs) to differentiate into adipose cells,and the optimum concentration of exogenous rh-bFGF by experimental research.Methods hASCs were isolated and extracted by enzymatic digestion from the liposuction aspirate.hASCs using adipogenic supplement were divided into experimental group and blank group:the experimental group of adipogenic supplement was divided into adding the exogenous rh-bFGF 10 ng/ml,20 ng/ml and 40 ng/ml,the blank group of adipogenic supplement was cultured without exogenous rh-bFGF.MTT method was used to detect the adipocytes proliferation.The oil red O staining was used in the qualitative analysis on the time of newly forming adipocyte cells.Western blot was used to detect the effects of rh-bFGF on the expression of lipid droplets surface protein CIDEC at different stages during the culture.Results The experimental group could obviously shorten the period of inducing hASCs to differentiate into adioicytes,and promote the proliferation of adipocytes.The formation rate and the proliferation of adipocytes in the group adding 40 ng/ml rh-bFGF were superior to those in the experimental group else and blank group.The average time of the newly formed lipid droplets by adding 40 ng/ml rh-bFGFwas (11.5±1.9)h.The average absorbance of cell proliferation by adding 40ml rh-bFGF was 0.52 ±0.10.The CIDEC expression quantity of adding 40 ng/ml rh-bFGF group was also superior to that in the experimental group and blank group.Conclusions rh-bFGF in hASCs adipogenic supplement could promote the proliferation of adipocytes and dramatically accelerates the program of hASCs differentiating to adipocytes,in which the optimum concentration of rh-bFGF is 40ng/ml.