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长春中医药大学,长春 130117
张怡,硕士,从事中药新药研究与开发研究,E-mail:280005049@qq.com
* 李宜平,教授,从事中药资源与开发研究,E-mail:czdliyiping@163.com
收稿日期:2021-03-31,
网络出版日期:2021-05-26,
纸质出版日期:2021-08-05
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张怡,郑冉,于奇等.哈蟆油蛋白酶解物对乙醇诱导的L-02细胞损伤的作用[J].中国实验方剂学杂志,2021,27(15):43-50.
ZHANG Yi,ZHENG Ran,YU Qi,et al.Effect of Ranae Oviductus Protein Hydrolysate on Ethanol-induced L-02 Cell Injury[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(15):43-50.
张怡,郑冉,于奇等.哈蟆油蛋白酶解物对乙醇诱导的L-02细胞损伤的作用[J].中国实验方剂学杂志,2021,27(15):43-50. DOI: 10.13422/j.cnki.syfjx.20211404.
ZHANG Yi,ZHENG Ran,YU Qi,et al.Effect of Ranae Oviductus Protein Hydrolysate on Ethanol-induced L-02 Cell Injury[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(15):43-50. DOI: 10.13422/j.cnki.syfjx.20211404.
目的
2
研究哈蟆油蛋白酶解物(ORPH)对乙醇诱导的L-02细胞损伤相关通路蛋白表达影响的作用机制研究。
方法
2
复合酶解法制备ORPH,以400 mmol·L
-1
乙醇建立L-02肝细胞损伤模型,细胞增殖与活性检测试剂盒-8(CCK-8)检测细胞活力;流式细胞术检测细胞凋亡、周期变化,JC-1/Hochest染色观察形态学变化;蛋白免疫印迹法(Western blot)检测凋亡相关蛋白、丝裂原活化蛋白激酶(MAPK)信号通路及细胞焦亡相关蛋白在L-02肝细胞中的表达变化,研究ORPH对乙醇所致肝细胞损伤的保护作用及机制。
结果
2
CCK-8法结果表明400 mmol·L
-1
乙醇可在12 h内明显引起L-02肝细胞损伤;与空白组比较,模型组L-02细胞活力显著下降(
P
<
0.01),细胞处于G
0
/G
1
期的细胞占比显著升高(
P
<
0.01),细胞总凋亡率显著升高(
P
<
0.01),线粒体膜电位下降;B细胞淋巴瘤-2(Bcl-2)相关X蛋白(Bax),细胞色素C(Cyt C),半胱氨酸天冬氨酸蛋白水解酶-3(Caspase-3)凋亡相关蛋白的表达明显升高(
P
<
0.05,
P
<
0.01),MAPK信号通路相关蛋白c-Jun氨基末端激酶(JNK),p38丝裂原活化蛋白激酶(p38 MAPK)明显上调(
P
<
0.05,
P
<
0.01),且焦亡蛋白Caspase-1,白细胞介素-1
β
(IL-1
β
)表达明显增强(
P
<
0.05),Bcl-2显著下降(
P
<
0.01);与模型组比较,ORPH处理组细胞周期阻滞有所改善(
P
<
0.05,
P
<
0.01),细胞总凋亡率显著下降(
P
<
0.01),线粒体膜电位升高,呈剂量相关性;Bax,Cyt C,Caspase-3蛋白表达明显降低(
P
<
0.05,
P
<
0.01),Bcl-2蛋白表达升高(
P
<
0.05,
P
<
0.01),MAPK信号通路相关蛋白及焦亡相关蛋白表达均呈下降趋势(
P
<
0.05,
P
<
0.01)。
结论
2
ORPH可通过抑制乙醇诱导L-02肝细胞引起的氧化应激肝细胞损伤,改善恢复线粒体膜电位,降低线粒体介导的细胞凋亡通路蛋白的表达,并抑制MAPK信号通路相关蛋白、焦亡通路相关蛋白表达,从而降低乙醇诱导L-02肝细胞的线粒体功能障碍及炎症反应并减轻氧化应激,对酒精性肝损伤起到治疗作用。
Objective
2
To study the protective effect and mechanism of Ranae Oviductus protein hydrolysate (ROPH) on the expression of pathway-related proteins in ethanol-induced L-02 cell injury.
Method
2
The ROPH was prepared by compound enzymatic hydrolysis. L-02 cell injury model was induced with 400 mmol·L
-1
ethanol. Cell viability was detected by cell counting kit-8 (CCK-8) assay. Cell cycle and apoptosis were examined by flow cytometry. JC-1/Hochest staining was employed for qualitative investigation. The expression of related proteins in apoptosis, mitogen-activated protein kinase (MAPK) signaling pathway, and pyroptosis in L-02 cells was detected by Western blot.
Result
2
The results of the CCK-8 assay showed that 400 mmol·L
-1
ethanol could induce L-02 cell injury within 12 hours. Compared with the blank group, the model group showed decreased viability of L-02 cells (
P
<
0.01), elevated percentage of the cell cycle in the G
0
/G
1
phase (
P
<
0.01), increased total cell apoptosis rate (
P
<
0.01), reduced mitochondrial membrane potential (
P
<
0.01), up-regulated expression of apoptosis-related proteins [B-cell lymphoma-2 (Bcl-2)-associated X protein (Bax), Cytochrome C (Cyt C), and cysteine-dependent aspartate specific protease-3 (Caspase-3)] (
P
<
0.05,
P
<
0.01) and MAPK signaling pathway-related proteins [C-Jun amino-terminal kinase (JNK) and p38 MAPK] (
P
<
0.05,
P
<
0.01), and potentiated expression of pyrolysis-related proteins Caspase-1 and interleukin-1
β
(IL-1
β
) (
P
<
0.05). Compared with the model group, the ROPH treatment group exhibited improved cell cycle arrest (
P
<
0.05,
P
<
0.01), diminished total cell apoptosis rate (
P
<
0.01), elevated mitochondrial membrane potential in a dose-dependent manner, down-regulated expression of Bax, Cyt C, and Caspase-3 proteins (
P
<
0.05,
P
<
0.01), up-regulated expression of Bcl-2 protein (
P
<
0.05,
P
<
0.01), and a downward trend in expression of proteins related to MAPK signaling pathway and pyrolysis (
P
<
0.05,
P
<
0.01).
Conclusion
2
ROPH could inhibit oxidative stress-triggered liver injury in ethanol-induced cells by improving mitochondrial membrane potential, reducing the expression of proteins in the mitochondria-mediated apoptosis pathway, and inhibiting the expression of proteins related to the MAPK signaling pathway and pyrolysis pathway to reduce the mitochondrial dysfunction and inflammatory response in ethanol-induced L-02 liver cells and inhibit oxidative stress, thereby exerting a therapeutic role in alcoholic liver injury.
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