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调肝理脾法对非酒精性脂肪性肝病大鼠模型肠黏膜Toll样受体4、occludin表达的影响
Effect of the liver-regulating and spleen-strengthening method on the expression of Toll-like receptor 4 and occludin in the intestinal mucosa of rats with nonalcoholic fatty liver disease
文章发布日期:2019年09月05日  来源:  作者:陈瑞琳,申青艳,牛柯敏,等  点击次数:103次  下载次数:13次

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【摘要】: 目的 观察调肝理脾法对高脂高糖饲料诱导的非酒精性脂肪性肝病大鼠模型肠黏膜屏障Toll样受体(TLR)4、occludin的影响。方法 将50只SD雄性大鼠随机分为正常组、模型组、调肝理脾组、调肝组和理脾组,并用高脂高糖饲料喂养4周诱导大鼠非酒精性脂肪性肝病模型,观察各组肝脏脂肪变性程度,肝功能变化及肠黏膜紧密连接蛋白occludin、肠道上皮TLR4的表达情况。计量资料多组间比较采用单因素方差分析,进一步两两比较采用LSD-t检验。结果 与正常组相比,模型组肝脏呈现脂肪变性;血清ALT、AST水平均显著升高(P值均<0.05),肠黏膜上皮细胞紧密连接蛋白occludin的表达降低,肠道上皮TLR4表达增加。与模型组相比,各治疗组脂肪变性程度均有减轻;occludin的表达均有增加;肠道上皮TLR4表达均有降低。各治疗组中,调肝理脾组脂肪变性程度最轻;血清ALT、AST水平降低更显著,与模型组比较差异均有统计学意义(P值均<0.05);occludin及TLR4的表达量变化更明显。结论 调肝理脾法通过上调肠黏膜上皮细胞紧密连接蛋白occludin的表达,降低肠道TLR4的表达,改善肠黏膜屏障功能,且疗效优于单纯使用调肝法或理脾法。
【Abstract】: Objective To investigate the effect of the liver-regulating and spleen-strengthening method on the expression of Toll-like receptor 4 (TLR4) and occludin in the intestinal mucosal barrier of rats with nonalcoholic fatty liver disease (NAFLD) induced by high-fat and high-sugar diet. Methods A total of 50 male Sprague-Dawley rats were randomly divided into normal group, model group, liver-regulating and spleen-strengthening group, liver-regulating group, and spleen-strengthening group. A rat model of nonalcoholic steatohepatitis was established by high-fat and high-sugar diet for four weeks. The five groups were observed in terms of the degree of hepatic steatosis, the change in liver function, and the expression of the tight junction protein occludin in the intestinal mucosa and TLR4 in the intestinal epithelium. A one-way analysis of variance was used for comparison between multiple groups, and the least significant difference t-test was used for further comparison between two groups. Results Compared with the normal group, the model group showed hepatic steatosis and had significant increases in the serum levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) (P<0.05), as well as a reduction in the expression of the tight junction protein occludin in intestinal epithelial cells and an increase in the expression of TLR4 in the intestinal epithelium. Compared with the model group, the three treatment groups had a significant reduction in the degree of steatosis, a significant increase in the expression of occludin, and a significant reduction in the expression of TLR4 in the intestinal epithelium. Among the three treatment groups, the liver-regulating and spleen-strengthening group had the lowest degree of steatosis and significantly greater reductions in the serum levels of ALT and AST than the model group (P<0.05), as well as significantly greater changes in the expression of occludin and TLR4. Conclusion The liver-regulating and spleen-strengthening method can improve intestinal mucosal barrier function by increasing the expression of the tight junction protein occludin in intestinal epithelial cells and reducing the expression of TLR4 in the intestine, with a better clinical effect than the liver-regulating method or the spleen-strengthening method alone.
【关键字】:非酒精性脂肪性肝病; 调肝理脾法; 肠黏膜; 大鼠, Sprague-Dawley
【Key words】:non-alcoholic fatty liver disease; method of regulating liver and spleen; intestinal mucosa; rats, Sprague-Dawley
【引证本文】:CHEN RL, SHEN QY, NIU KM, et al. Effect of the liver-regulating and spleen-strengthening method on the expression of Toll-like receptor 4 and occludin in the intestinal mucosa of rats with nonalcoholic fatty liver disease[J]. J Clin Hepatol, 2019, 35(10): 2252-2256. (in Chinese)
陈瑞琳, 申青艳, 牛柯敏, 等. 调肝理脾法对非酒精性脂肪性肝病大鼠模型肠黏膜Toll样受体4、occludin表达的影响[J]. 临床肝胆病杂志, 2019, 35(10): 2252-2256.

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