人外周血血清培养人脐带间充质干细胞定向诱导为神经干细胞  

Targeted induction of human umbilical cord mesenchymal stem cells cultured with human peripheral blood serum into neural stem cells

作　　者：韩霞[1] 赵瑞东[1] 杨俊丽[2] Han Xia;Zhao Ruidong;Yang Junli(Stem Cell Laboratory,The Affiliated Hospital of Inner Mongolia Medical University,Hohhot 010050,Inner Mongolia Autonomous Region,China;Health Examination Center,The Affiliated Hospital of Inner Mongolia Medical University,Hohhot 010050,Inner Mongolia Autonomous Region,China)

机构地区：[1]内蒙古医科大学附属医院干细胞实验室,内蒙古自治区呼和浩特市010050 [2]内蒙古医科大学附属医院体检中心,内蒙古自治区呼和浩特市010050

出　　处：《中国组织工程研究》2024年第25期4000-4004,共5页Chinese Journal of Tissue Engineering Research

基　　金：内蒙古医科大学科技百万工程联合资助项目[YKD2017KJBW(LH)005],项目负责人:韩霞。

摘　　要：背景:细胞培养基种类甚多,成分不尽相同,对细胞生长影响较大。国内外有多项研究采用无血清、含胎牛血清的培养基进行体外扩增培养,但应用含人外周血血清的培养基将人脐带间充质干细胞定向诱导为神经干细胞以及人外周血血清促进神经干细胞分化为其他神经细胞,目前相关研究较少。目的:观察人外周血血清培养的人脐带间充质干细胞定向诱导为神经干细胞的可行性。方法:①采用含体积分数10%人外周血血清的DMEM/F12培养基培养人脐带间充质干细胞,传代培养至第3代时应用流式细胞仪分析其表面标志物,并通过茜素红染色对其成骨分化能力进行检测;②取第3代人脐带间充质干细胞,加入培养体系为含0.5%N2、1.5%B27、20 ng/mL碱性成纤维细胞生长因子和20 ng/mL表皮生长因子的DMEM/F12培养基定向诱导为神经干细胞,对其表面标志物进行鉴定;③取生长状态良好的人脐带间充质干细胞源性神经干细胞,制备成单细胞悬液,均匀接种于96孔板中,加入含体积分数10%人外周血血清的DMEM/F12培养液继续培养8 d后,进行苏木精-伊红染色、微管相关蛋白2和胶质纤维酸性蛋白免疫荧光染色,检测神经干细胞向其他神经细胞分化情况。结果与结论:①经人外周血血清培养的人脐带间充质干细胞呈漩涡状生长且多层分布,排列有方向性;人脐带间充质干细胞表面高度表达CD44、CD105、CD29、CD73,茜素红染色阳性;②人外周血血清培养的人脐带间充质干细胞可以定向诱导分化为神经干细胞,神经干细胞表面高度表达CD44、CD105、CD29、CD73、Nestin、NF-L、GALC;③神经干细胞诱导分化第8天时,经苏木精-伊红染色后发现其伸出的突起长度较长,分支也较多且邻近细胞之间的突起互相连接,呈典型的神经细胞形态,且微管相关蛋白2和胶质纤维酸性蛋白免疫荧光染色均呈阳性。结果表明,人外周血血清培BACKGROUND:There are many kinds of cell media with different components,which have a great influence on cell growth.Several studies in and outside China have used serum-free media containing fetal bovine serum for in vitro amplification culture,but the use of media containing human peripheral blood serum to directionally induce human umbilical cord mesenchymal stem cells to neural stem cells and human peripheral blood serum to promote neural stem cells to differentiate into other nerve cells,so far there are few relevant studies.OBJECTIVE:To observe the feasibility of inducing human umbilical cord mesenchymal stem cells cultured with human peripheral blood serum into neural stem cells.METHODS:(1)Human umbilical cord mesenchymal stem cells were cultured in DMEM/F-12 culture medium containing 10%human peripheral blood serum by volume fraction.Flow cytometry analysis was performed at the third passage to identify surface markers and alizarin red staining was used to detect osteogenic differentiation function.(2)The third-generation human umbilical cord mesenchymal stem cells were induced into neural stem cells using DMEM/F-12 medium containing 0.5%N2,1.5%B27,20 ng/mL basic fibroblast growth factor,and 20 ng/mL epidermal growth factor,and their surface markers were identified.(3)Well-growing human umbilical cord mesenchymal stem cell-derived neural stem cells were taken to prepare a single cell suspension.They were evenly inoculated into 96-well plates and incubated with DMEM/F-12 culture medium containing 10%human peripheral blood serum for 8 days.Then,hematoxylineosin staining,microtubule-associated protein 2,and glial fibrillary acidic protein immunofluorescence staining were performed to detect the differentiation of neural stem cells into other neural cells.RESULTS AND CONCLUSION:(1)Human umbilical cord mesenchymal stem cells cultured with human peripheral blood serum grew in a spiral-like pattern and were distributed in multiple layers,with directional arrangement.The surface of human umbilical cord mesenchymal

关 键 词：人外周血血清 人脐带间充质干细胞 神经干细胞 神经细胞 分化 

分 类 号：R459.9[医药卫生—治疗学] R-331[医药卫生—临床医学] R-392.12