正丁酸鈉對糖尿病T細(xì)胞亞群的影響
[Abstract]:Aim: to observe the changes of T cell subsets and the expression of HMGB1 protein in type 1 diabetes mellitus (T1DM) mice. Sodium butyrate was used as an antagonist of late inflammatory factor HMGB1. To explore the possible mechanism of delaying the development of type 1 diabetes and its effect on helper T lymphoid (Th) cells, to elucidate the role of HMGB1 and Th cells in the development and development of type 1 diabetes, and to provide a new way of thinking on the immunological intervention of type 1 diabetes. Methods Thirty C57BL / 6 male C57BL / 6 strain mice with SPF grade 5-6 weeks of age were fed with conventional diet for one week to adapt to the new environment. After one week, 30 mice were randomly divided into normal control (NC) group, diabetes mellitus (DM) group and sodium butyrate (SB) group. There were 10 mice in each group. According to the body weight dose of 40mg/kg, group SB was injected intraperitoneally with sodium butyrate 500 mg / kg / day, which was dissolved in citrate buffer solution once a day for 5 days, while the group SB was given sodium butyrate 500 mg / kg / day, and the control group was given sodium butyrate 500 mg / kg / day. At the end of the experiment, the DM group and NC group were intraperitoneally injected with 0.9% saline at the same time. The mice were given sufficient food and water to monitor random blood glucose on the 7th day, and then killed after the seventh blood glucose monitoring. The blood glucose levels were observed before and after the establishment of the model and the intervention of sodium butyrate in mice. The differentiation ratio of Th17 cells in spleen Th2T and pancreatic drainage lymph nodes (PLNs) was detected by flow cytometry. Western blotting was used to detect the expression of HMGB1 protein in mouse pancreas. Elisa was used to detect IL-1 尾 cytokines in serum of mice. Results at the end of the second week, the blood glucose level of the mice in the weight DM group was significantly higher than that in the NC group (P0.01). Compared with NC group, the proportion of Th1 cells in spleen of DM group increased significantly (P0.05) the proportion of Th2 cells decreased (P0.05) the ratio of Th1 / Th2 increased significantly (P0.01) the proportion of Th17 cells decreased slightly. There was no significant difference (P0.05) in the proportion of Th17 cells in PLNs (P0.01). The level of IL-1 尾 cytokines in peripheral blood of DM group was significantly higher than that of NC group (P0.01), and the expression level of HMGB1 protein in pancreatic tissue was significantly higher than that in NC group (P0.01). Compared with DM group, the onset time was delayed, the incidence rate was significantly decreased (P0.05), blood glucose level was significantly decreased (P0.05), Th1 cells in spleen tissue were significantly decreased (P0.05) and Th2 cells in spleen tissue were slightly increased. But the ratio of Th1 / Th2 decreased significantly (P0.01), the ratio of Th17 cells in PLNs decreased significantly (P0.01), the level of HMGB1 protein in pancreatic tissue was significantly lower than that in DM group (P0.01), and the level of IL-1 尾 cytokines in peripheral blood was lower than that in DM group (P0.01). Conclusion: (1) in the animal model of T1DM, sodium butyrate can delay the onset of T1DM and reduce the incidence of T1DM. (2) the proportion of Th1 cells in spleen of T1DM mice is up-regulated and Th17 cells in PLNs are up-regulated, and IL-1 尾 pro-inflammatory cytokines are increased in serum of T1DM mice. The increase of HMGB1 protein expression in pancreatic tissue may lead to the sustained destruction of 尾 cells. (3) Sodium butyrate may improve the incidence and blood sugar level of mice by regulating the proportion of Th1 Th2 and Th17 cells and the level of IL-1 尾 inflammatory cytokines in serum. Sodium butyrate may slow down the pathogenesis of T1DM by inhibiting the production of late HMGB1 inflammatory mediators, reducing the local inflammatory response of pancreas and protecting islet 尾 cells from destruction.
【學(xué)位授予單位】:長江大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:R587.1
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