【摘要】 目的建立稳定有效的大鼠胰岛分离方法,探讨影响胰岛活性的因素。方法通过胆管注射胶原酶方法提取大鼠胰岛,通过水浴法比较不同条件下葡萄糖刺激的胰岛素分泌,用放免法(R IA)测定胰岛素。结果牛血清白蛋白(BSA)能明显提高葡萄糖刺激的胰岛素分泌水平,长时间培养(>7 d)的胰岛,其葡萄糖刺激的胰岛素分泌下降约25%,而新鲜分离的胰岛和经1~5 d培养的胰岛未见明显差异。RPM I1640培养液中葡萄糖浓度11.1 mmol/L组,其胰岛素分泌明显高于5.5 mmol/L和25 mmol/L这2组。结论BSA、RPM I1640培养液中葡萄糖浓度及培养时间均与分离胰岛活性有关。更多还原

【Abstract】 Objective To assess the factors which affect the activity of isolated islets,and to construct a steady and effective isolation method of rat pancreatic islets.Methods Pancreatic islets were isolated by collagenase method.The glucose-stimulation of insulin secretion(GSIS) in different conditions was performed by batch incubation method and measured by RIA.Results GSIS was improved by BSA;There was a evident decrease of insulin secretion in cultured islets of 7 days,however,no difference was observed between the freshly isolated islets group and the 1～5days cultured islets groups.Compared to the groups of(5.5 mmol/L) and(25 mmol/L) glucose in the culture medium,(11.1 mmol/L) glucose group stimulated higher insulin release.Conclusion BSA,glucose concentration of RPMI1640 medium and the culture period are related to the activity of isolated islets.更多还原