基于TLR4/MyD88/NF-κB信号通路探讨毒消肝清丸对肝硬化内毒素血症大鼠肝组织炎症反应的影响

李树志; 刘铁军

doi:10.3969/j.issn.1001-5256.2019.09.015

基于TLR4/MyD88/NF-κB信号通路探讨毒消肝清丸对肝硬化内毒素血症大鼠肝组织炎症反应的影响

DOI: 10.3969/j.issn.1001-5256.2019.09.015

1. 长春中医药大学
2. 长春中医药大学附属医院

基金项目:

国家自然科学基金青年科学基金项目(81804007)；

详细信息

中图分类号: R285.5
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出版历程
- 收稿日期: 2019-05-29
- 出版日期: 2019-09-20

Effect of Duxiao Ganqing Pill on liver inflammation in rats with cirrhotic endotoxemia: An analysis based on the TLR4/MyD88/NF-κB signaling pathway

Changchun University of Traditional Chinese Medicine

Research funding:

摘要

摘要: 目的通过CCl4复合造模制备肝硬化内毒素血症模型,探讨毒消肝清丸对大鼠肝脏炎性损伤的保护机制。方法:66只大鼠造模过程中有17只死亡,取3只大鼠检测内毒素和观察肝脏结构,确定造模成功,剩余随机分成正常组（n=6）,模型组（n=8）、乳果糖组（n=8）、毒消肝清丸高、中、低剂量组（223. 4 mg/kg、111. 7 mg/kg、58. 9 mg/kg,n=8）。采用CCl4复合造模法造模8周,制备肝硬化内毒素血症动物模型。正常组和模型组给予蒸馏水,乳果糖组予乳果糖,毒消肝清丸药物组按上述剂量每天给药1次,连续8周。测定内毒素含量变化、HE染色观察肝脏组织变化情况、采用ELISA检测肝脏组织TNFα、IL-1β、IL-6的含量;Western Blot和RT-PCR技术检测TLR4、MyD88、NF-κB蛋白及其mRNA的表达。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法。结果各组间大鼠血浆内毒素水平差异有统计学意义（F=26. 011,P <0. 001）;模型组内毒素水平较正常组显著升高（P <0. 01）;给药后乳果糖组、毒消肝清丸不同剂量组大...
- 肝硬化 /
- 内毒素血症 /
- Toll样受体4 /
- NF-κB /
- 髓样分化因子88 /
- 细胞因子类 /
- 毒消肝清丸 /
- 大鼠,Sprague-Dawley
Abstract: Objective To establish a rat model of cirrhotic endotoxemia by CCl4 compound modeling, and to investigate the protective mechanism of Duxiao Ganqing Pill against liver inflammatory injury. Methods A total of 66 rats were selected, among which 17 died during modeling. Among the remaining 49 rats, 3 were selected to measure endotoxin and observe liver structure to determine whether the model was successfully established, and the other 46 rats were randomly divided into normal group with 6 rats, model group with 8 rats, lactulose group with 8 rats, and high-, middle-, and low-dose Duxiao Ganqing Pill ( 223. 4, 111. 7, and 58. 9 mg/kg) groups with 8 rats in each group. CCl4 compound modeling was performed for 8 weeks to establish a rat model of liver cirrhosis. The rats in the normal group and the model group were given distilled water, those in the lactulose group were given lactulose, and those in the Duxiao Ganqing Pill groups were given the drug according to the above doses, once a day for 2 consecutive months. The change in the content of endotoxin was measured. HE staining was used to observe the change in liver tissue, ELISA was used to measure the content of tumor necrosis factor-α ( TNF-α) , interleukin-1β ( IL-1β) , and interleukin-6 ( IL-6) in liver tissue, and Western blot and RT-PCR were used to measure the protein and mRNA expression of TLR4, MyD88, and NF-κB. A one-way analysis of variance was used for data comparison between groups, and the least significant difference t-test was used for further comparison of data with homogeneity of variance between two groups. Results There was a significant difference in serum endotoxin level between these groups ( F = 26. 011, P < 0. 001) ; the model group had a signifi-cantly higher endotoxin level than the normal group ( P < 0. 01) ; after treatment, the lactulose group and high-, middle-, and low-dose Duxiao Ganqing Pill groups had significantly lower serum endotoxin levels than the model group ( P < 0. 01) . There were significant differences in serum levels of IL-6, IL-1β, and TNF-α between these groups ( F = 35. 390, P = 0. 002; F = 38. 271, P = 0. 001; F =40. 241, P < 0. 001) ; the model group had significantly higher serum levels of IL-6, IL-1β, and TNF-α than the normal group ( all P < 0. 01) ; after treatment, the lactulose group and high-, middle-, and low-dose Duxiao Ganqing Pill groups had significantly lower serum levels of IL-6, IL-1β, and TNF-α than the model group ( all P < 0. 01) . There were significant differences in the mRNA and protein expression of TLR4, MyD88, and NF-κB in liver tissue between these groups ( F = 24. 483, 29. 547, 19. 242, 18. 752, 22. 146, and 15. 834, all P < 0. 01) ; the model group had significantly higher mRNA and protein expression of TLR4, MyD88, and NF-κB in liver tissue than the normal group ( all P < 0. 01) ; after treatment, the lactulose group and high-, middle-, and low-dose Duxiao Ganqing Pill groups showed significant reductions in the mRNA and protein expression of TLR4, MyD88, and NF-κB in liver tissue ( all P < 0. 01) , and the middle-and high-dose Duxiao Ganqing Pill groups had significantly greater reductions than the low-dose Duxiao Ganqing Pill group ( all P < 0. 01) . Conclusion Duxiao Ganqing Pill can inhibit the transduction of inflammatory signals by downregulating the TLR4/MyD88/NF-κB signaling pathway in liver tissue, reduce the expression of the cytokines TNF-α, IL-1β, and IL-6, and thus alleviate endotoxemia and exert a protective effect on liver tissue.
- liver cirrhosis /
- endotoxemia /
- toll-like receptor 4 /
- NF-kappa B /
- myeloid differentiation factor 88 /
- cytokines /
- Duxiao Ganqing Pill /
- rats, Sprague-Dawley

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