牛磺鹅去氧胆酸对兔实验性肠炎损伤的保护作用初探
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南京医科大学附属口腔医院种植科

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国家自然科学基金面上项目(882271003);国家自然科学基金青年项目(82201096);江苏高校“青蓝工程”中青年学术带头人项目;江苏省科教能力提升工程—江苏省研究型医院建设单位(项目编号:YJXYYJSDW4);江苏省医学创新中心(项目编号:CXZX202227)


The protective effect of Taurochenodeoxycholic acid on experimental enteritis injury in rabbits: a preliminary study
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Department of Oral Implantology,Affiliated Stomatological Hospital of Nanjing Medical University,Jiangsu Province Key Laboratory of Oral Diseases,Jiangsu Privince Engineering Research Center of Stomatological Trarslational Medicine

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    摘要:

    目的 分析牛磺鹅去氧胆酸(taurochenodeoxycholicacid,TCDCA)对肠道炎症的疗效,为肠道急慢性炎症的治疗提供理论依据。方法 体内外实验分组均为空白组、LPS组、LPS+TCDCA组。体外实验中首先应用MTT法筛选TCDCA的适宜工作浓度,随后LPS组给予巨噬细胞LPS刺激,LPS+TCDCA组先后给予LPS与TCDCA刺激,RT-qPCR和Western blot检查炎症相关mRNA和蛋白的表达。体内实验中,LPS组通过兔耳缘静脉注射LPS溶液,LPS+TCDCA组同上处理后通过饮水喂食TCDCA溶液。实验取材后通过HE染色、过碘酸-雪夫染色和阿尔新蓝-核固红染色评估样本的组织病理学改变。结果 体外实验结果显示:与LPS组相比,LPS+TCDCA组巨噬细胞中促炎指标表达量显著降低,抗炎指标表达量升高。体内实验中,HE染色结果显示肠道组织炎症缓解,过碘酸-雪夫染色和阿尔新蓝-核固红染色结果显示LPS+TCDCA组杯状细胞数量和酸性、中性黏蛋白分泌量均较LPS组有所上升。结论:牛磺鹅去氧胆酸(TCDCA)可通过降低炎症因子的表达缓解肠道组织炎症,减轻LPS造成的肠道炎症损伤。

    Abstract:

    [Abstract] Objective To analyze the efficacy of taurochenodeoxycholic acid on intestinal inflammation and to provide a theoretical basis for the treatment of acute and chronic inflammation of the intestinal tract. Methods The in vitro and in vivo experimental groups were blank group, LPS group and LPS+TCDCA group. In the in vitro experiments, MTT method was firstly applied to screen the appropriate working concentration of TCDCA, and then macrophage LPS stimulation was given to the LPS group, and LPS and TCDCA stimulation were given to the LPS+TCDCA group successively, and the expression of inflammation-related mRNAs and proteins were examined by RT-qPCR and Western blot. In the in vivo experiments, the LPS group was injected with LPS solution intravenously through the ear margin of rabbits, and the LPS+TCDCA group was treated as above and then fed with TCDCA solution through drinking water. Histopathological alterations of the samples were assessed by HE staining, periodic acid-Schiff staining and Alcian blue-nuclear solid red staining after experimental sampling. Results The results of in vitro experiments showed that the expression of pro-inflammatory indexes was significantly reduced and the expression of anti-inflammatory indexes was elevated in macrophages in the LPS+TCDCA group compared with that in the LPS group. In the in vivo experiments, the results of HE staining showed that the inflammation of intestinal tissues was relieved, and the results of periodic acid-Schiff staining and Alcian blue-nucleic solid red staining showed that the number of cup cells and the secretion of acidic and neutral mucins in the LPS+TCDCA group increased compared with that in the LPS group. Conclusion: Taurine deoxycholic acid (TCDCA) alleviates intestinal tissue inflammation and reduces intestinal inflammatory damage caused by LPS by decreasing the expression of inflammatory factors.

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  • 收稿日期:2023-08-07
  • 最后修改日期:2023-12-05
  • 录用日期:2024-04-03
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