姜黄素对小鼠胆汁淤积性肝纤维化的改善作用及其机制研究*

doi:10.12047/j.cjap.5796.2019.102

摘要/Abstract

摘要： 目的:探讨姜黄素对小鼠胆管结扎所致的胆汁淤积性肝纤维化的保护作用,为肝纤维化治疗提供新的治疗方法。方法:42只健康成年雄性BALB/c小鼠随机分为假手术(n=6)处理组、假手术+姜黄素(n=6)处理组、胆管结扎(BDL)处理组(n=10)、BDL+姜黄素处理组(n=10),BDL+姜黄素+锌原卟啉(ZnPP)处理组(n=10)。BDL手术7 d后,假手术+姜黄素组、BDL+姜黄素组每日给予姜黄素(30 mg / kg)腹腔注射;BDL+姜黄素+ZnPP组每日给予姜黄素(30 mg / kg)以及nPP(50 μmol/ kg)腹腔注射;对于假手术组和BDL组,小鼠每天一次腹膜内注射等体积的盐水。整个给药过程持续7 d。小鼠BDL14 d后,取血和肝脏组织,检测谷草转氨酶(AST)、谷丙转氨酶(ALT)水平,观察肝组织病理形态变化、肝纤维化情况、检测肝组织中血红素加氧酶-1(HO-1)的蛋白表达。结果:与假手术组相比,BDL组小鼠肝脏胆囊肿大,血清谷草转氨酶(ALT)、谷丙转氨酶(AST)水平显著升高 (P＜0.05),同时,天狼星红染色及促纤维化相关基因的qRT-PCR结果显示肝脏出现胶原蛋白沉积,巨噬细胞及中性粒细胞免疫组化结果显示肝脏出现炎性细胞浸润;与BDL组相比,姜黄素治疗组血清ALT、AST水平明显降低(P＜0.05),胶原蛋白沉积及炎性细胞浸润情况有所改善,同时,补充姜黄素后HO-1表达升高(P＜0.05);对姜黄素治疗组给予HO-1活性抑制剂ZnPP发现,姜黄素对肝损伤的保护作用被逆转。结论:姜黄素可以改善BDL所致的肝脏炎症及肝纤维化,这种保护作用可能与姜黄素调节HO-1活性有关。

关键词: 姜黄素, 胆管结扎, 血红素加氧酶-1, 小鼠, 肝纤维化

Abstract: Objective: To investigate the protective effects of curcumin on bile duct ligation(BDL)-induced liver cholestasis in mice, so as to provide a new treatment strategy for liver fibrosis. Methods: Forty-two healthy adult male BALB/c mice were randomly divided into sham group (n =6), sham+curcumin group (n=6), BDL treatment group (n=10), BDL+curcumin group(n=10), BDL+curcumin+ZnPP group (n=10). Seven days after BDL operation, the sham operation + curcumin group and the BDL+ curcumin group were treated with curcumin at the dose of 30 mg/kg by intraperitoneal injection once a day for 7 days.The mice in BDL+ curcumin +ZnPP group were treated with curcumin (30 mg/kg) and ZnPP (50 μmol/kg) by intraperitoneal injection once a day for 7 days. For the sham group and the BDL group, mice were treated with equal-volume saline daily by intraperitoneal injection. After 14 days of BDL, the plasma and liver tissues were collected, the levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were measured. The pathological changes of liver tissue and liver fibrosis were observed, and the protein expression of HO-1 in liver tissue was detected. Results: Compared with the sham group, mice in the BDL group had enlarged liver gallbladder and the serum levels of ALT and AST were increased significantly (P＜0.05). Meanwhile, the results of Sirius red staining and qRT-PCR of pro-fibrosis related genes showed collagen deposition in the liver, and immunohistochemistry of macrophages and neutrophils showed inflammatory cell infiltration in the liver. Compared with the BDL group, the serum levels of ALT and AST in the curcumin treatment group were decreased significantly (P＜0.05), collagen deposition and inflammatory cell infiltration were improved, and HO-1 expression was increased (P＜0.05) after curcumin treatement. In the curcumin treatment group, the protective effect of curcumin on liver injury could be reversed by HO-1 active inhibitor ZnPP. Conclusion: Curcumin can improve liver inflammation and fibrosis caused by BDL, and this protective effect is related to the regulation of HO-1 activity by curcumin.

Key words: curcumin, bile duct ligation, heme oxygenase-1, mice, liver fibrosis

吴晨, 邱玉保, 孙雪倩, 陈丹, 吴亚先, 庞庆丰. 姜黄素对小鼠胆汁淤积性肝纤维化的改善作用及其机制研究^*[J]. 中国应用生理学杂志, 2019, 35(5): 468-472.

WU Chen, QIU Yu-bao, SUN Xue-qian, CHEN Dan, WU Ya-xian, PANG Qing-feng. Effects of curcumin on liver fibrosis induced by cholestasis in mice[J]. CJAP, 2019, 35(5): 468-472.

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姜黄素对小鼠胆汁淤积性肝纤维化的改善作用及其机制研究^*

Effects of curcumin on liver fibrosis induced by cholestasis in mice

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