Khorsandi Layasadat, Nejad-Dehbashi Fereshteh, Ahangarpour Akram, Hashemitabar Mahmoud
Cell & Molecular Research Center, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran; Department of Anatomical Sciences, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Cell & Molecular Research Center, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
Tissue Cell. 2015 Feb;47(1):66-72. doi: 10.1016/j.tice.2014.11.005. Epub 2014 Dec 5.
Fibrin glue (FG) is used in a variety of clinical applications and in the laboratory for localized and sustained release of factors potentially important for tissue engineering. The aim of this study was to evaluate FG scaffold effect on differentiation of insulin-producing cells (IPCs) from bone marrow-derived mesenchymal stem cells (BM-MSCs). In this experimental study BM-MSCs were cultured and the cells characterized by analysis of cell surface markers using flow cytometry. BM-MSCs were seeded in FG scaffold (3D culture) and then treated with induction media. After induction, the presence of IPCs was demonstrated using gene expression profiles for pancreatic cell differentiation markers (PDX-1, GLUT-2 and insulin) and insulin detection in cytoplasm. Release of insulin by these cells was confirmed by radioimmunoassay. Expression of the islet-associated genes PDX-1, GLUT-2 and Insulin genes in 3D cultured cells was markedly higher than the 2D cultured cells exposure differentiation media. Compared to 2D culture of BM-MSCs-derived IPCs, the insulin release from 3D BM-MSCs-derived IPCs showed a nearly 3 fold (p<0.05) increase when exposed to a high glucose (25 mM) medium. Percentage of insulin positive cells in 3D experimental group showed an approximately 3.5-fold increase in compared to 2D experimental culture cells. The results of this study demonstrated that FG scaffold can enhance the differentiation of IPCs from rats BM-MSCs.
纤维蛋白胶(FG)被用于多种临床应用以及实验室中,用于局部和持续释放对组织工程可能重要的因子。本研究的目的是评估FG支架对骨髓间充质干细胞(BM-MSCs)向胰岛素产生细胞(IPCs)分化的影响。在这项实验研究中,培养了BM-MSCs,并通过流式细胞术分析细胞表面标志物对细胞进行表征。将BM-MSCs接种到FG支架(三维培养)中,然后用诱导培养基处理。诱导后,使用胰腺细胞分化标志物(PDX-1、GLUT-2和胰岛素)的基因表达谱以及细胞质中胰岛素的检测来证明IPCs的存在。通过放射免疫测定法确认这些细胞释放胰岛素。三维培养细胞中胰岛相关基因PDX-1、GLUT-2和胰岛素基因的表达明显高于二维培养细胞暴露于分化培养基时的表达。与BM-MSCs来源的IPCs的二维培养相比,当暴露于高糖(25 mM)培养基时,三维BM-MSCs来源的IPCs的胰岛素释放增加了近3倍(p<0.05)。三维实验组中胰岛素阳性细胞的百分比与二维实验培养细胞相比增加了约3.5倍。本研究结果表明,FG支架可以增强大鼠BM-MSCs向IPCs的分化。
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