中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (33): 5334-5341.doi: 10.12307/2023.762

• 干细胞基础实验 basic experiments of stem cells • 上一篇    下一篇

柔肝降酶方含药血清抑制人肝星状细胞的活化及自噬

陶柏楠1,王咏兰1,江  露1,张宗星1,刘道忠1,万  星2,黄德斌1,袁  林1   

  1. 1湖北民族大学,风湿性疾病发生与干预湖北省重点实验室,湖北省恩施州   445000;2四川大学,华西基础医学与法医学院,四川省成都市   610064
  • 收稿日期:2022-09-20 接受日期:2022-11-14 出版日期:2023-11-28 发布日期:2023-03-30
  • 通讯作者: 袁林,副教授,湖北民族大学,风湿性疾病发生与干预湖北省重点实验室,湖北省恩施州 445000
  • 作者简介:陶柏楠,男,1996年生,湖北民族大学在读硕士,主要从事中医药防治肝脏疾病的研究。
  • 基金资助:
    国家自然科学基金资助项目(82060745),项目负责人:黄德斌;湖北省卫健委面上项目(ZY2019M076),项目负责人:袁林;恩施州科技局科技计划性项目(E20190001),项目负责人:袁林

Rougan Jiangmei Formula medicated serum inhibits activation and autophagy of human hepatic stellate cells

Tao Bonan1, Wang Yonglan1, Jiang Lu1, Zhang Zongxing1, Liu Daozhong1, Wan Xing2, Huang Debin1, Yuan Lin1   

  1. 1Hubei Provincial Key Laboratory of Occurrence and Intervention of Rheumatic Diseases, Hubei Minzu University, Enshi 445000, Hubei Province, China; 2West China School of Preclinical Medicine and Forensic Medicine, Sichuan University, Chengdu 610064, Sichuan Province, China
  • Received:2022-09-20 Accepted:2022-11-14 Online:2023-11-28 Published:2023-03-30
  • Contact: Yuan Lin, Associate professor, Hubei Provincial Key Laboratory of Occurrence and Intervention of Rheumatic Diseases, Hubei Minzu University, Enshi 445000, Hubei Province, China
  • About author:Tao Bonan, Master candidate, Hubei Provincial Key Laboratory of Occurrence and Intervention of Rheumatic Diseases, Hubei Minzu University, Enshi 445000, Hubei Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 82060745 (to HDB); General Project of Hubei Provincial Health Commission, No. ZY2019M076 (to YL); Science and Technology Planning Project of Enshi Prefecture Science and Technology Bureau, No. E20190001 (to YL)

摘要:


文题释义:

肝纤维化:是一种由病毒性肝炎、非酒精性脂肪肝等多种病因引起的慢性肝损伤,肝细胞被反复破坏久之产生细胞外基质的沉积与异常分布的疾病,其主要机制在于肝脏损伤后造成肝星状细胞大量活化,活化后的肝星状细胞由原来的静息状态转为快速增殖状态并大量转化为肌成纤维细胞,替代正常肝细胞,肝脏发生实变,产生大量纤维样瘢痕,失去正常功能。
自噬:是一种进化上保守的细胞过程,在调节机体能量和营养、维持机体能量代谢中起着至关重要的作用,通过降解溶酶体中受损的细胞器、异常的蛋白质聚集物和受损的DNA来维持细胞内稳态。大量研究表明,自噬在慢性纤维化肝病中表现异常活跃,自噬已被报道在肝纤维化的发生和发展中发挥重要调节作用,肝星状细胞自噬参与肝纤维化病理进展,抑制肝星状细胞自噬可延缓肝纤维化进程。

背景:自噬在肝纤维化中发挥重要作用,可以通过诱导肝星状细胞活化促进肝纤维化的进程。前期研究表明,柔肝降酶方具有保护肝功能、抗炎、抗氧化应激反应等作用,其是否通过自噬抗肝纤维化的作用机制尚未阐明。
目的:探讨柔肝降酶方含药血清对脂多糖诱导的人肝星状细胞活化及自噬的影响及其潜在的作用机制。
方法:用脂多糖建立人肝星状细胞活化模型,分成不同的处理组:①空白组:人肝星状细胞+空白血清;②模型组:人肝星状细胞+空白血清+脂多糖;③柔肝降酶方低、中、高剂量含药血清组:人肝星状细胞+低、中、高剂量柔肝降酶方含药血清+脂多糖;④柔肝降酶方高剂量含药血清联合雷帕霉素组:高剂量组基础上+雷帕霉素;⑤柔肝降酶方高剂量含药血清联合PI3K抑制剂组:高剂量组基础上+
LY294002。CCK-8法观察细胞增殖情况;采用单丹磺酰尸胺染色法观察细胞自噬情况;Western Blot检测细胞通路蛋白(PI3K、P-PI3K、AKT、P-AKT、mTOR、P-mTOR)、自噬相关蛋白(P62、Beclin-1、LC3-Ⅰ、LC3-Ⅱ)、人肝星状细胞活化标志蛋白(α-平滑肌肌动蛋白、Ⅰ型胶原纤维)表达水平的影响。

结果与结论:①柔肝降酶方含药血清能够降低人肝星状细胞的增殖活性,下调Ⅰ型胶原纤维、α-平滑肌肌动蛋白的蛋白表达,上调自噬P62蛋白的表达,降低LC3-Ⅱ、Beclin-1蛋白的表达,且呈现剂量依赖性;②MDC荧光染色结果显示,柔肝降酶方含药血清可使细胞绿色斑点荧光强度降低;③加入自噬激动剂雷帕霉素后,P62蛋白表达降低,LC3-Ⅱ、Beclin-1蛋白表达升高;④经过柔肝降酶方含药血清处理后,PI3K、Akt、mTOR蛋白磷酸化水平升高,呈剂量依赖性,这种作用能被PI3K抑制剂LY294002减弱;⑤提示柔肝降酶方含药血清可能通过PI3K/Akt/mTOR信号通路抑制自噬,减少脂多糖诱导的人肝星状细胞活化。

https://orcid.org/0000-0003-2483-6091 (陶柏楠) 

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 柔肝降酶方, 细胞自噬, Akt, mTOR, LC3-Ⅱ, 人肝星状细胞

Abstract: BACKGROUND: Autophagy can play an important role in liver fibrosis by inducing the progression of hepatic stellate cell activation. Previous studies have shown that Rougan Jiangmei Formula could protect liver function, anti-inflammation, and anti-oxidative stress response. The mechanism of fighting liver fibrosis through autophagy has not been elucidated.  
OBJECTIVE: To investigate the effect of Rougan Jiangmei Formula medicated serum on activation and autophagy of human hepatic stellate cells induced by lipopolysaccharide and its underlying mechanism.
METHODS: Human hepatic stellate cell activation models were established using lipopolysaccharide and divided into various treatment groups: (1) Blank group: human hepatic stellate cells+blank serum; (2) model group: human hepatic stellate cells+blank serum+lipopolysaccharide; (3) low-, medium- and high-dose Rougan Jiangmei Formula medicated serum groups: human hepatic stellate cells+low-, medium- and high-dose Rougan Jiangmei Formula medicated serum+lipopolysaccharide; (4) high-dose Rougan Jiangmei Formula medicated serum combined with rapamycin group: based on high-dose group+rapamycin; (5) high-dose Rougan Jiangmei Formula medicated serum combined with PI3K inhibitor group: based on high-dose group+LY294002. Cell proliferation was observed by CCK-8 assay. The autophagy was observed by monodansylcadaverine staining. The effects of Rougan Jiangmei Formula medicated serum on the expression levels of cell pathway-related proteins (PI3K, P-PI3K, AKT, P-AKT, mTOR, P-mTOR), autophagy-related proteins (P62, Beclin-1, LC3-I, LC3-II), the activation marker protein of hepatic stellate cells (α-smooth-muscle actin and collagen I) were determined by western blot assay.  
RESULTS AND CONCLUSION: (1) Rougan Jiangmei Formula medicated serum significantly reduced the proliferation of activated human hepatic stellate cells, down-regulated the protein expression of α-smooth-muscle actin and collagen I, up-regulated the expression of autophagy protein P62, and decreased the expression of Beclin-1 and LC3-II in a dose-dependent manner. (2) Monodansylcadaverine staining results exhibited that Rougan Jiangmei Formula medicated serum significantly inhibited the fluorescence intensity of the cell green spots. (3) After the addition of autophagy agonist rapamycin, the expression of autophagy protein P62 was reduced and the expression levels of Beclin-1 and LC3-II were increased. (4) After Rougan Jiangmei Formula medicated serum treatment, the phosphorylation levels of PI3K, Akt, and mTOR proteins were increased in a dose-dependent manner. This effect could be inhibited by the PI3K inhibitor LY294002. (5) It is indicated that Rougan Jiangmei Formula medicated serum may inhibit autophagy via the PI3K/Akt/mTOR signaling pathway and then reduce lipopolysaccharide-induced human hepatic stellate cell activation.

Key words: Rougan Jiangmei Formula, cell autophagy, Akt, mTOR, LC3-II, human hepatic stellate cell

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