Regeneration of transplantable pancreatic islet cells has been considered to be a promising alternative therapy for type 1 diabetes. Re-search has suggested that adult pancreatic stem and progenitor cells can be deriv...Regeneration of transplantable pancreatic islet cells has been considered to be a promising alternative therapy for type 1 diabetes. Re-search has suggested that adult pancreatic stem and progenitor cells can be derived into insulin-producing cells or cultivated islet-like clusters given appropriate stimulating condi- tions. In this study we explored the effect of selective extracellular matrix (ECM) proteins on the potential of insulin-producing cell differen-tiation using ARIP cells, an adult rat pancreatic ductal epithelial cell line, as a model in vitro. Quantitative single cell morphology analysis indicated that all the four ECM proteins we have used (type I collagen, laminin, fibronectin and vitronectin) increased the single cell area and diameter of ARIP cells. In addition, se-rum-free cell cultivation was dependent on cell density and particular components;and serum could be replaced when systematic optimisa-tion could be performed. Surface treated with laminin was shown to be able to enhance overall cell expansion in the presence of de-fined serum-free medium conditions. Collagen treated surfaces enhanced insulin production in the presence of GLP-1 although the insulin gene expression was however weak accord-ingly. Our results suggest that selective ECM proteins have effects on single cell morphol-ogy, adhesion and proliferation of ARIP cells. These ECM molecules however do not have a potent effect on the insulin-producing cell dif-ferentiation potential of ARIP cells even com-bining with GLP-1.展开更多
自胰高血糖素样肽1（glucagon-like pe ptide-1,GLP-1）发现以来,国内外研究焦点主要集中在降糖疗效上。糖尿病主要并发症是动脉粥样硬化（athero-sclerosis,As）,GLP-1对As及其心血管风险是否有防治作用受到高度关注[1-2]。As病变触发...自胰高血糖素样肽1（glucagon-like pe ptide-1,GLP-1）发现以来,国内外研究焦点主要集中在降糖疗效上。糖尿病主要并发症是动脉粥样硬化（athero-sclerosis,As）,GLP-1对As及其心血管风险是否有防治作用受到高度关注[1-2]。As病变触发于内膜,伴有血管平滑肌细胞（vascular smooth muscle cell,VSMC）的增生迁移和免疫细胞浸润[3]。展开更多
文摘Regeneration of transplantable pancreatic islet cells has been considered to be a promising alternative therapy for type 1 diabetes. Re-search has suggested that adult pancreatic stem and progenitor cells can be derived into insulin-producing cells or cultivated islet-like clusters given appropriate stimulating condi- tions. In this study we explored the effect of selective extracellular matrix (ECM) proteins on the potential of insulin-producing cell differen-tiation using ARIP cells, an adult rat pancreatic ductal epithelial cell line, as a model in vitro. Quantitative single cell morphology analysis indicated that all the four ECM proteins we have used (type I collagen, laminin, fibronectin and vitronectin) increased the single cell area and diameter of ARIP cells. In addition, se-rum-free cell cultivation was dependent on cell density and particular components;and serum could be replaced when systematic optimisa-tion could be performed. Surface treated with laminin was shown to be able to enhance overall cell expansion in the presence of de-fined serum-free medium conditions. Collagen treated surfaces enhanced insulin production in the presence of GLP-1 although the insulin gene expression was however weak accord-ingly. Our results suggest that selective ECM proteins have effects on single cell morphol-ogy, adhesion and proliferation of ARIP cells. These ECM molecules however do not have a potent effect on the insulin-producing cell dif-ferentiation potential of ARIP cells even com-bining with GLP-1.
