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Collagen type VI interaction improves human islet survival in immunoisolating microcapsules for treatment of diabetes

机译:胶原蛋白VI相互作用改善了免疫分离微胶囊中的人胰岛存活以治疗糖尿病

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ABSTRACT: Collagens are the most abundant fibrous protein in the human body and constitute the main structural element of the extracellular matrix. It provides mechanical and physiological support for cells. In the pancreas, collagen VI content is more than double that of collagen I or IV. It is a major component of the islet-exocrine interface and could be involved in islet-cell survival. To test the impact of collagen VI on human encapsulated pancreatic islets-cells, we tested the effects of exogenous collagen type VI on in vitro functional survival of alginate encapsulated human islet-cells. Concentrations tested ranged from 0.1 to 50 μg/ml. Islets in capsules without collagen type VI served as control. Islet-cell interaction with collagen type VI at concentrations of 0.1 and 10 μg/ml, promoted islet-cell viability (p<0.05). Although no improvement in glucose induced insulin secretion (GSIS) was observed, islets in capsules without incorporation of collagen type VI showed more dysfunction and oxygen consumption rates was improved by inclusion of collagen type VI. Our results demonstrate that incorporation of collagen type VI in immunoisolated human islets supports in vitro viability and survival of human pancreatic islets. ? 2018 The Author(s). Published with license by Taylor & Francis ? 2018, ? L. Alberto Llacua, Arjan Hoek, Bart J. de Haan, and Paul de Vos.
机译:摘要:胶原蛋白是人体中最丰富的纤维蛋白质,构成细胞外基质的主要结构元素。它为细胞提供机械和生理支持。在胰腺中,胶原蛋白VI含量大于胶原I或IV的两倍。它是胰岛外界面的主要成分,可参与胰岛 - 细胞存活。为了测试胶原蛋白VI对人包封的胰岛 - 细胞的影响,我们测试了外源胶原型VI对藻酸盐包封的人胰岛细胞体外功能存活的影响。测试的浓度范围为0.1至50μg/ ml。没有胶原蛋白类型的胶囊中的胰岛vi用作控制。在0.1和10μg/ mL的浓度下与胶原型VI的胰岛细胞相互作用,促进了胰岛细胞活力(P <0.05)。尽管观察到葡萄糖诱导的胰岛素分泌(GSIS)的改善,但是在不掺入胶原蛋白VI的胶囊中的胰岛表明通过包含胶原型VI,提高了更多功能障碍和氧气消耗率。我们的结果表明,在免疫分离的人胰岛中掺入胶原蛋白型VI支持人类胰岛的体外活力和存活。还2018年作者。泰勒&弗朗西斯发布的牌照? 2018年,? L. Alberto Llacua,Arjan Hoek,Bart J. de Haan和Paul de Vos。

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