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The research on inducing islet neogenesis using INGAP-related pentadecapeptide in vitro
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- Author:
- No author available
- Journal Title:
- CHINESE JOURNAL OF DIABETES
- Issue:
- 7
- DOI:
- 10.3969/j.issn.1006-6187.2009.07.018
- Key Word:
- INGAP;胰岛;新生;细胞分化;胰岛移植
Abstract： 目的 应用INGAP多肽在体外建立新的分步诱导分化体系诱导胰岛新生. 方法 分离纯化SD大鼠的胰腺导管干细胞.并体外扩增培养,取2～6代细胞进行分步诱导分化,于分化末期添加INGAP多肽,待诱导结束后收获新生类胰岛样细胞团(ILCs)分别行免疫荧光和RT-PCR检测,并通过葡萄糖刺激的胰岛素释放试验(GSIS)评价ILCs的胰岛素分泌能力. 结果 (1)分离纯化的胰腺导管干细胞经过四步诱导后最终可形成立体结构的ILCs,其insulin和glucagon染色均为阳性,RT-PCR检测该ILCs也有insulin和glucagon基因的表达.(2)GSIS结果:新生ILCs和新分离胰岛的高糖组胰岛素释放量均显著高于低糖组(P＜0.01);新生ILCs的胰岛素刺激指数接近新分离胰岛(P＞0.01). 结论 通过建立新的包含INGAP多肽的体外分步诱导分化体系,能够获得具有立体结构和一定胰岛素分泌能力的立体ILCs,为获取胰岛移植所需的β细胞提供了更有效的方法.
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