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中华危重症医学杂志(电子版) ›› 2017, Vol. 10 ›› Issue (06) : 361 -366. doi: 10.3877/cma.j.issn.1674-6880.2017.06.001

所属专题: 文献

论著

糖原合成酶激酶3β介导细胞自噬在急性肝衰竭中的作用
张向颖1, 魏琳琳2, 时红波1, 郑素军3, 陈煜3, 陈德喜1, 李秀惠4, 段钟平3, 任锋1,()   
  1. 1. 100069 北京,首都医科大学附属北京佑安医院肝病研究所
    2. 100069 北京,首都医科大学附属北京佑安医院内分泌肝病科
    3. 100069 北京,首都医科大学附属北京佑安医院人工肝中心
    4. 100069 北京,首都医科大学附属北京佑安医院中西医结合中心
  • 收稿日期:2017-02-20 出版日期:2017-12-01
  • 通信作者: 任锋
  • 基金资助:
    国家自然科学基金项目(81770611、81270532); 北京市自然科学基金项目(7162085); 首都特色临床应用研究项目(Z121107001012167); 北京市卫生系统高层次卫生技术人才培养计划项目(2013-3-075); 北京市属医学科研院所公益发展改革试点项目(京医研2016-2); 北京市肝病研究所自主课题基金项目(BJIH01709)

Effect of glycogen synthase kinase 3beta-mediated autophagy in acute liver failure

Xiangying Zhang1, Linlin Wei2, Hongbo Shi1, Sujun Zheng3, Yu Chen3, Dexi Chen1, Xiuhui Li4, Zhongping Duan3, Feng Ren1,()   

  1. 1. Beijing Institute of Hepatology, Beijing Youan Hospital, Capital Medical University, Beijing 100069, China
    2. Department of Endocrine Liver Disease, Beijing Youan Hospital, Capital Medical University, Beijing 100069, China
    3. Artificial Liver Center, Beijing Youan Hospital, Capital Medical University, Beijing 100069, China
    4. Center of Integrated Chinese and Western Medicine, Beijing Youan Hospital, Capital Medical University, Beijing 100069, China
  • Received:2017-02-20 Published:2017-12-01
  • Corresponding author: Feng Ren
  • About author:
    Corresponding author: Ren Feng, Email:
引用本文:

张向颖, 魏琳琳, 时红波, 郑素军, 陈煜, 陈德喜, 李秀惠, 段钟平, 任锋. 糖原合成酶激酶3β介导细胞自噬在急性肝衰竭中的作用[J/OL]. 中华危重症医学杂志(电子版), 2017, 10(06): 361-366.

Xiangying Zhang, Linlin Wei, Hongbo Shi, Sujun Zheng, Yu Chen, Dexi Chen, Xiuhui Li, Zhongping Duan, Feng Ren. Effect of glycogen synthase kinase 3beta-mediated autophagy in acute liver failure[J/OL]. Chinese Journal of Critical Care Medicine(Electronic Edition), 2017, 10(06): 361-366.

目的

探讨细胞内信号分子糖原合成酶激酶3β(GSK3β)介导细胞自噬在急性肝衰竭(ALF)发生过程中的作用。

方法

采用氨基酸缺乏的培养基对转染绿色荧光蛋白(GFP)-LC3质粒的C57BL/6小鼠原代肝细胞进行12 h饥饿处理,对照组给予0.2%浓度的二甲基亚砜(DMSO)处理,实验组给予不同浓度的SB216763抑制GSK3β活性后,进行12 h饥饿处理,计数GFP-LC3阳性细胞比例。此外检测在给予10 μM的SB216763后不同饥饿处理时间下小鼠肝细胞自噬相关蛋白(LC3Ⅱ、p62、Atg5、Atg7及Beclin-1)的表达水平。采用D-氨基半乳糖(D-GalN)联合脂多糖(LPS)建立小鼠ALF模型,给予25 mg/kg的SB216763抑制GSK3β活性后检测小鼠肝组织内自噬相关基因和蛋白的表达水平。

结果

与DMSO +饥饿组相比,给予SB216763(5 μM、10 μM)的两个干预组GFP-LC3阳性细胞比例均显著增加[(11.6 ± 2.9)%、(44.0 ± 9.8)%、(59.2 ± 13.7)%,P均< 0.05]。Western-blotting检测结果显示,与对应不同饥饿处理时间(3 h、6 h、12 h)的DMSO +饥饿组比较,SB216763 +饥饿组的肝细胞中LC3Ⅱ、Atg5、Atg7和Becilin-1蛋白表达均显著增加,而p62蛋白表达均显著下降(P均< 0.05)。D-GalN/LPS诱导的ALF小鼠模型中,SB216763 + D-GalN/LPS组的肝脏组织中自噬相关基因Atg5[(0.626 ± 0.024)vs.(0.243 ± 0.029)]、Atg7 [(1.70 ± 0.10)vs.(0.33 ± 0.08)]和Beclin-1 [(1.24 ± 0.16)vs.(0.49 ± 0.04)],相关蛋白LC3Ⅱ[(0.173 ± 0.031)vs.(0.093 ± 0.009)]、Atg5 [(1.53 ± 0.11)vs.(0.32 ± 0.05)]、Atg7 [(0.92 ± 0.14)vs. (0.58 ± 0.12)]和Becilin-1[(0.263 ± 0.050)vs.(0.130 ± 0.022)]的表达水平均较D-GalN/LPS组显著增高(P均< 0.05)。

结论

通过抑制GSK3β活性可促进细胞自噬,从而在ALF中发挥保护性作用。

Objective

To study the effect of the intracellular signaling molecule glycogen synthase kinase 3beta (GSK3β)-mediated autophagy in the pathogenesis of acute liver failure (ALF).

Methods

The primary hepatocytes from C57BL/6 mice were transfected with green fluorescent protein (GFP)-LC3 plasmid following 12 h starvation treatment by amino acid deficiency medium. The control group was treated with 0.2% dimethyl sulfoxide (DMSO); the experiment groups were treated with the different concentrations of SB216763 to inhibit GSK3β activity, following 12 h starvation treatment. The proportion of GFP-LC3 positive cell was counted. Moreover, the autophagy related protein (LC3 Ⅱ, p62, Atg5, Atg7 and Beclin 1) expression levels of mouse hepatocytes were detected at different periods of starvation treatment after given 10 μM SB216763. The mouse ALF model was induced by D-galactosamine (D-GalN) plus lipopolysaccharide (LPS), the autophagy-related mRNA and protein expression levels in mouse liver tissue were detected after given 25 mg/kg SB216763 to inhibit GSK3β activity.

Results

Compared with the DMSO + starvation group, the proportions of GFP-LC3 positive cell increased significantly in the two intervention groups treated with SB216763 (5 μM, 10 μM) [(11.6 ± 2.9) %, (44.0 ± 9.8) %, (59.2 ± 13.7)%; all P < 0.05]. Western-blotting results showed that compared with the DMSO + starvation groups of corresponding periods of starvation treatment (3 h, 6 h, 12 h), the LC3Ⅱ, Atg5, Atg7 and Becilin-1 protein expressions significantly increased, and p62 protein expressions significantly decreased in mouse hepatocytes in SB216763 + starvation groups (all P < 0.05). In the D-GalN/LPS induced mouse ALF model, the expressions of autophagy-related genes Atg5 [(0.626 ± 0.024) vs. (0.243 ± 0.029)], Atg7 [(1.70 ± 0.10) vs. (0.33 ± 0.08)], Beclin-1 [(1.24 ± 0.16) vs. (0.49 ± 0.04)], and proteins LC3Ⅱ[(0.173 ± 0.031) vs. (0.093 ± 0.009)], Atg5 [(1.53 ± 0.11) vs. (0.32 ± 0.05)], Atg7 [(0.92 ± 0.14) vs. (0.58 ± 0.12)], Becilin-1 [(0.263 ± 0.050) vs. (0.130 ± 0.022)] in liver tissue of the SB216763 + D-GalN/LPS group were all significantly higher than the D-GalN/LPS model group (all P < 0.05).

Conclusion

Inhibition of GSK3β activity may play a protective role in ALF by mediating autophagy.

表1 饥饿处理12 h后各组小鼠肝细胞内自噬水平比较( ± s
表2 各组小鼠肝细胞内自噬相关蛋白相对表达水平的比较( ± s
表3 三组小鼠肝脏组织中细胞自噬相关基因表达水平的比较( ± s
表4 三组小鼠肝脏组织中细胞自噬相关蛋白表达水平的比较( ± s
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