微囊化大鼠胰岛细胞移植治疗糖尿病小鼠的实验研究

观察微囊化和未囊化大鼠胰岛细胞移植治疗糖尿病小鼠的疗效。选用SD大鼠经胆总管原位灌注胶原酶液,分离消化胰腺组织,用淋巴细胞分离液(Histopaque-1077)纯化胰岛细胞,将微囊化和未囊化大鼠胰岛细胞移植于糖尿病小鼠腹腔。分离的胰岛细胞对刺激反应良好,微囊化和未囊化胰岛细胞移植后均可纠正糖尿病小鼠的高血糖状态,但未囊化胰岛细胞移植组只能维持血糖正常2~3d,而微囊化胰岛细胞移植组可持续降低血糖30d以上。微囊化胰岛细胞移植治疗糖尿病小鼠具有良好的效果,微囊具有较好的免疫隔离作用。

Experimental Treatment of Diabetic Mice with Microencapsulated Rat Islet Cells Transplantation

To observe treatment effects of diabetic mice with microcapsulated and non-microcapsulated rat islet cell transplantation,pancreas of SD rat was perfused with collagenase through cloledchus,and then the pancreatic tissues were isolated and digested.Histopaque-1077 was used to purify the digested pancreas.Islet cells were collected and implanted into the peritoneal cavity of diabetic mice.The isolated islets had a response upon glucose stimulation.When the microcapsulated islets and non-microcapsulated islets were transplanted into diabetic mices the high blood glucose level could be decreased to normal.The normal blood glucose level in the diabetic mice transpanted with microcapsulated islets could be maintained for over 30 days,but it could be mainlained only for 2-3 days in the diabetic mice transplanted with non-microcapsulated islets.Thus it is believed that microcapsulated islet cell transplantation exerts good effect on diabetic mice and the microcapsules possessed good immunoisolating function.