实用肝脏病杂志 ›› 2025, Vol. 28 ›› Issue (1): 20-23.doi: 10.3969/j.issn.1672-5069.2025.01.006

• 实验性肝炎 • 上一篇    下一篇

SIRT1激动剂CAY10602对急性肝衰竭小鼠肝损伤保护作用研究*

沈起艳, 张龙, 张艳琼, 张小雅, 王鲁文, 龚作炯   

  1. 430060 武汉市 武汉大学人民医院感染病科
  • 收稿日期:2024-06-07 出版日期:2025-01-10 发布日期:2025-02-07
  • 通讯作者: 龚作炯,E-mail:zjgong@163.com
  • 作者简介:沈起艳,女,25岁,硕士研究生。主要从事急慢性肝病的防治研究。E-mail:18296392096@163.com;共同第一作者:王鲁文,男,49岁,副主任医师。主要从事急慢性肝病的防治研究。E-mail:Wangluw8253@163.com
  • 基金资助:
    *湖北省自然科学基金资助项目(编号:2022CFB120)

Protection of CAY10602, a SIRT1 agonist, on liver injuries in mice with LPS/D-Gal-induced acute liver failure

Shen Qiyan, Zhang Long, Zhang Yanqiong, et al   

  1. Department of Infectious Diseases, People’s Hospital, Affiliated to Wuhan University, Wuhan 430060, Hubei Province, China
  • Received:2024-06-07 Online:2025-01-10 Published:2025-02-07

摘要: 目的 探讨沉默信息调控因子2相关酶1(SIRT1)激动剂CAY10602对急性肝衰竭(ALF)小鼠肝脏的保护作用。方法 将40只小鼠随机分为对照组、LPS/D-Gal模型组、LPS/D-Gal/CAY10602处理组、LPS/D-Gal/GLY处理组和LPS/D-Gal/CAY10602/GLY处理组,每组8只。采用腹腔注射脂多糖联合D-氨基半乳糖(LPS/D-Gal)方法制备ALF小鼠模型,分别给予SIRT1激动剂CAY10602和高迁移率族蛋白B1(HMGB1)抑制剂甘草酸(GLY)干预。采用Western blot法检测小鼠肝组织SIRT1、HMGB1以及铁死亡相关蛋白谷胱甘肽过氧化物酶4(GPX4)和酰基辅酶A合成酶长链家族成员4(ACSL4)表达。结果 LPS/D-Gal模型组小鼠肝组织结构严重紊乱,肝细胞大片坏死,肝组织淤血严重,制备模型成功,而SIRT1激动剂CAY10602能够显著减轻ALF小鼠肝组织损伤;LPS/D-Gal模型组小鼠血清ALT、AST和TBIL水平分别为(3278.3±520.8)U/L、(2457.0±545.5)U/L和(96.4±16.5)μmol/L,显著高于对照组[分别为(32.1±10.3)U/L、(67.8±12.8)U/L和(4.7±2.3)μmol /L,P < 0.05],LPS/D-Gal/CAY10602组小鼠血清ALT、AST和TBIL水平分别为(1438.2±259.8)U/L、(944.1±112.8)U/L和(54.4±10.8)μmol /L,显著低于模型组(P < 0.05);Western blot检测结果显示,与模型组比,CAY10602显著降低了HMGB1表达(P <0.05),促进了铁死亡相关蛋白GPX4表达,降低了ACSL4表达(P<0.05),表明SIRT1激动剂CAY10602可能通过降低HMGB1以及肝组织铁死亡蛋白表达进而减轻肝组织的损伤。结论 SIRT1激动剂CAY10602能够减轻ALF小鼠肝组织损伤,对肝脏具有保护作用,其作用机制可能是抑制了HMGB1的释放和抑制肝组织铁死亡的发生。

关键词: 急性肝衰竭, 沉默信息调控因子2相关酶1, 高迁移率族蛋白B1, 铁死亡, 小鼠

Abstract: Objective This experiment was performed to investigate protective effects of silencing information regulator 2 related enzyme 1 (SIRT1) agonist CAY10602 on liver injuries in mice with acute liver failure (ALF). Methods Forty mice were randomly divided into 5 groups, e.g., control, model, CAY10602-intervend, glycyrrhizin (GLY)-intervened and CAY10602 and GLY combination-intervened group, with 8 mice in each group. A model of ALF was established by intraperitoneal injection of lipopolysaccharide and D-galactosamine (LPS/D-Gal). SIRT1 agonist CAY10602 and high mobility group box-1 protein (HMGB1) inhibitor glycyrrhizin (GLY) were used for intervention. Hepatic expression of SIRT1, HMGB1, and ferroptosis-related protein glutathione peroxidase 4 (GPX4), and Acyl-CoA synthetase long-chain family member 4 (ACSL4) was detected by Western blot. Results Liver tissue structure of mice in LPS/D-Gal model group was seriously disordered, necrosis of hepatocytes was found, and liver tissue congestion was serious; However, SIRT1 agonist CAY10602 intervention could significantly ameliorate liver tissue injuries; serum ALT, AST and bilirubin levels in LPS/D-Gal model group mice were (3278.3±520.8) U/L, (2457.0±545.5) U/L and (96.4±16.5) μmol/L, significantly higher than in control group [(32.1±10.3) U/L, (67.8±12.8) U/L and (4.7±2.3) μmol/L, P<0.05]; serum ALT, AST and bilirubin levels in LPS-Gal/D/CAY10602-intervened group mice were significantly lower than in the model group; compared with in the model group, CAY10602 significantly decreased hepatic expression of HMGB1 (P <0.05), while promoted ferroptosis-related protein GPX4 expression, and decreased expression of ACSL4 (P<0.05), suggesting that SIRT1 agonist CAY10602 might alleviate liver injuries by inhibiting HMGB1 expression and reducing ferroptosis in liver tissues. Conclusions SIRT1 agonist CAY10602 can protect liver tissue injuries, and the mechanism might be involved inhibition of hepatic HMGB1 release and ferroptosis occurrence.

Key words: Acute liver failure, Silencing information regulator 2 related enzyme 1, High mobility group box-1 protein, Ferroptosis, Mice