中国组织工程研究 ›› 2012, Vol. 16 ›› Issue (49): 9214-9220.doi: 10.3969/j.issn.2095-4344.2012.49.017

• 干细胞因子及调控因子 stem cell factors and regulatory factors • 上一篇    下一篇

生长因子体外诱导骨髓间充质干细胞向肝样细胞的分化

陈鹏飞,魏文斌,谭远忠,胡 晟   

  1. 湖北省恩施州中心医院中医部消化内科,湖北省恩施市 445000
  • 收稿日期:2012-09-04 修回日期:2012-09-11 出版日期:2012-12-02 发布日期:2012-09-11
  • 通讯作者: 魏文斌,主任,主任医师,湖北省恩施州中心医院中医部消化内科,湖北省恩施市 445000 weiwenbin@ 163.com
  • 作者简介:陈鹏飞★,男,1985年生,湖北省咸丰县人,土家族,2011年重庆医科大学毕业,硕士,医师,主要从事消化性疾病方面的研究。 xfcpff@163.com

In vitro differentiation of rat bone marrow mesenchymal stem cells into hepatocyte-like cells induced by growth factor

Chen Peng-fei, Wei Wen-bin, Tan Yuan-zhong, Hu Cheng   

  1. Department of Gastroenterology, Traditional Chinese Medicine Part, Enshi Center Hospital, Enshi 445000, Hubei Province, China
  • Received:2012-09-04 Revised:2012-09-11 Online:2012-12-02 Published:2012-09-11
  • Contact: Wei Wen-bin, Chief physician, Department of Gastroenterology, Traditional Chinese Medicine Part, Enshi Center Hospital, Enshi 445000, Hubei Province, China weiwenbin@163.com
  • About author:Chen Peng-fei★, Master, Physician, Department of Gastroenterology, Traditional Chinese Medicine Part, Enshi Center Hospital, Enshi 445000, Hubei Province, China xfcpff@163.com

摘要:

背景:肝细胞生长因子是体外诱导骨髓间充质干细胞向肝干细胞方向分化的关键性细胞因子。碱性成纤维细胞生长因子不仅能提高骨髓间充质干细胞的增殖速度及其寿命,且能在增殖过程中保留骨髓间充质干细胞的多向分化潜能。
目的:探讨肝细胞生长因子和碱性成纤维细胞生长因子联合诱导大鼠骨髓间充质干细胞分化为肝样细胞的可行性。
方法:取大鼠股骨骨髓,用直接贴壁法分离纯化骨髓间充质干细胞并体外传代,流式细胞仪及成骨诱导对骨髓间充质干细胞进行鉴定。将细胞按以下分组进行成肝诱导:①M0组:不添加任何因子。②M1组:20 μg/L肝细胞生长因子。③M2组:20 μg/L肝细胞生长因子+5 μg/L碱性成纤维细胞生长因子。④M3组:20 μg/L 肝细胞生长因子+10 μg/L碱性成纤维细胞生长因子。⑤M4组:20 μg/L肝细胞生长因子+20 μg/L碱性成纤维细胞生长因子。倒置显微镜下观察细胞形态变化,在不同分化阶段用免疫细胞化学染色法检测不成熟肝细胞表型标志甲胎蛋白和成熟肝细胞表型标志细胞白蛋白的表达。
结果与结论:骨髓间充质干细胞诱导后呈肝样细胞形态改变。甲胎蛋白在诱导第7天细胞基本为阳性着色,在诱导第14天时表达降低,21 d表达为阴性。细胞白蛋白在诱导第14天细胞开始表达,而后持续。M0对照组未见阳性染色,同一时间点,M3、M4组细胞阳性染色率高于M2组(P < 0.05)。提示肝细胞生长因子和碱性成纤维细胞生长因子具有体外诱导骨髓间充质干细胞向肝样细胞分化的作用,二者有协同作用。

关键词: 肝细胞生长因子, 骨髓间充质干细胞, 分化, 碱性成纤维细胞生长因子, 肝样细胞

Abstract:

BACKGROUND: Hepatocyte growth factor is a key cytokine for in vitro inducing the differentiation of bone marrow mesenchymal stem cells into liver stem cells. Basic fibroblast growth factor can not only increase the proliferation rate of mesenchymal stem cells and its life, but also can maintain the multilineage differentiation potential of mesenchymal stem cells in the proliferation process. 
OBJECTIVE:
To investigate the possibility of rat bone marrow mesenchymal stem cells to differentiate into hepatocyte-like cells induced by hepatocyte growth factor and basic fibroblast growth factor in vitro.
METHODS: Bone marrow mesenchymal stem cells were collected from femora of Sprague-Dawley rats. The harvested bone marrow mesenchymal stem cells were separated and purified by whole bone marrow adherent culture method, and passaged in vitro. The bone marrow mesenchymal stem cells were identified by flow cytometry and osteogenic induction. The cells were divided into groups: (1) M0 group: as a negative control, treated without any factor; (2) M1 group: as the positive control group, treated with 20 μg/L hepatocyte growth factor; (3) M2 group: treated with 20 μg/L hepatocyte growth factor+5 μg/L basic fibroblast growth factor; (4) M3 group: treated with 20 μg/L hepatocyte growth factor+10 μg/L basic fibroblast growth factor; (5) M4 group: treated with 20 μg/L hepatocyte growth factor+20 μg/L basic fibroblast growth factor. The morphological changes were observed under inverted microscope. At different stages of differentiation, the album expressions of of mature hepatocyte phenotype marker and alpha fetoprotein of immature hepatocyte phenotype marker were detected by immunohistochemical staining. 
RESULTS AND CONCLUSION: The harvested bone marrow mesenchymal stem cells showed morphologic changes of hepatocyte after induction. The album was positively stained at 7 days after induction, its expression level was reduced at 14 days after induction, and then the expression changed into negative at 21 days after induction. The expression of alpha fetoprotein began to appear at 14 days after induction and then continued. No positive staining could be seen in the M0 group, and at the same time point, the positive staining rate in the M3 and M4 group was higher than that in the M2 group (P < 0.05). It indicates that hepatocyte growth factor and basic fibroblast growth factor can induce bone marrow mesenchymal stem cells to differentiate into hepatocyte-like cells, and there is synergistic effect between them.

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