无菌金黄地鼠糖尿病粪菌移植模型建立
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中国医学科学院医学实验动物研究所

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]中国医学科学院医学与健康科技创新工程项目(2022-12M-1-020)。


Establishment of sterile golden hamster diabetic model by fecal bacteria transplantation
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Institute of Laboratory Animal Sciences,CAMS PUMC,National Center of Technology Innovation for animal model,NHC Key Laboratory of Comparative Medicine,National Human Diseases Animal Model Resource Center

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    摘要:

    目的 通过粪菌移植方法建立无菌金黄地鼠糖尿病模型并对模型进行评价。方法 24只雄性无菌金黄地鼠分为对照组(CN)和模型组(DM),每组各12只,分别接种健康SD大鼠和糖尿病SD大鼠粪便混悬液。粪菌移植10周时安乐死动物,取血液、小肠、胰腺和大肠内容物,进行血生化、组织病理学检查和16S rRNA测序。结果 粪菌移植后,血液生化指标检测显示CN组与DM组载脂蛋白A1,载脂蛋白B存在显著性差异(P<0.05)。DM模型组胰高血糖素、空腹血糖水平显著升高(P<0.01),空腹胰岛素显著下降(P<0.001),呈现明显糖脂代谢紊乱及胰岛素抵抗特征。HE染色显示,与CN组比较DM组胰腺出现多灶性脂肪沉积,胰岛萎缩,胰岛细胞减少,胰岛形态不规则及肿胀坏死,胰岛细胞增生,毛细血管增多,基底膜增厚。DM组小肠绒毛上皮增生,小肠绒毛融合、排列错乱,细胞肿胀并伴有变性坏死,小肠黏膜固有层炎性细胞聚集。16S rRNA测序显示CN组与DM组肠道菌群的多样性及特定菌群丰度存在显著差异。DM组α多样性指标中的chao1指数、shannon指数、simpson指数均显著降低(P< 0. 05)。 Unweighted Unifrac距离显著降低(P<0.01),提示β多样性存在差异。两者肠道细菌群落组成存在显著差异,DM组疣微菌门(Verrucomicrobiota)显著增加(P<0.05),厚壁菌门(Firmicutes)显著降低(P<0.05)。结论 通过粪菌移植技术成功建立无菌金黄地鼠糖尿病模型,动物出现与糖尿病相似的临床特征,为深入研究肠道微生物与糖尿病的发生发展关系提供了动物模型。

    Abstract:

    Objective To establish a sterile golden hamster diabetes model by fecal microbiota transplantation and evaluate the model. Method Twenty-four male sterile golden hamsters were divided into the control group (CN) and the model group (DM), with 12 hamsters in each group. They were respectively inoculated with fecal suspensions of healthy SD rats and diabetic SD rats. 10 weeks after fecal microbiota transplantation, the animals were euthanized. Blood, contents of the small intestine, pancreas and large intestine were collected for blood biochemistry, histopathological examination and 16S rRNA sequencing. Results After fecal microbiota transplantation, the detection of blood biochemical indicators showed that there were significant differences in apolipoprotein A1 and apolipoprotein B between the CN group and the DM group (P<0.05). In the DM model group, the levels of glucagon and fasting blood glucose were significantly increased (P<0.01), and fasting insulin was significantly decreased (P<0.001), presenting obvious characteristics of glycolipid metabolism disorder and insulin resistance. HE staining showed that compared with the CN group, the pancreas in the DM group presented with multifocal fat deposition, islet atrophy, reduction of islet cells, irregular islet shape, swelling and necrosis, islet cell proliferation, increased capillaries, and thickening of the basement membrane. In the DM group, there was hyperplasia of the small intestinal villus epithelium, fusion and disordered arrangement of the small intestinal villi, cell swelling accompanied by degeneration and necrosis, and aggregation of inflammatory cells in the lamina lining of the small intestinal mucosa. 16S rRNA sequencing showed that there were significant differences in the diversity of intestinal microbiota and the abundance of specific microbiota between the CN group and the DM group. The chao1 index, shannon index and simpson index in the α diversity index of the DM group were significantly decreased (P<0.05). The Unweighted Unifrac distance decreased significantly (P<0.01), suggesting that there were differences in β diversity. There were significant differences in the composition of intestinal bacterial communities between the two groups. In the DM group, the Verrucomicrobiota was significantly increased (P<0.05), and the Firmicutes was significantly decreased (P<0.05). Conclusion The sterile golden hamster diabetes model was successfully established through fecal microbiota transplantation technology. The animals presented clinical characteristics similar to those of diabetes, providing an animal model for in-depth research on the relationship between intestinal microbiota and the occurrence and development of diabetes.

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  • 收稿日期:2025-04-28
  • 最后修改日期:2025-06-24
  • 录用日期:2025-11-27
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