基础医学与临床 ›› 2023, Vol. 43 ›› Issue (10): 1522-1529.doi: 10.16352/j.issn.1001-6325.2023.10.1522

• 研究论文 • 上一篇    下一篇

敲减抗增殖蛋白2促进非小细胞肺癌细胞系A549凋亡

张婧1, 杨自更2, 韦红梅1, 宁海虹3, 薛茜茜1, 金玲4, 吴宾4*   

  1. 新疆军区总医院 1.营养科;
    2.核医学科;
    3.卫勤训练中心;
    4.老年医学科,新疆 乌鲁木齐 830000
  • 收稿日期:2023-03-01 修回日期:2023-06-01 出版日期:2023-10-05 发布日期:2023-10-05
  • 通讯作者: *wubin0917@163.com
  • 基金资助:
    新疆维吾尔族自治区自然科学基金(2022D01C644);新疆军区总医院喀喇昆仑基金(2022JC002)

Knockdown of prohibitin 2 promotes apoptosis in non-small cell lung cancer cell line A549

ZHANG Jing1, YANG Zigeng2, WEI Hongmei1, NING Haihong3, XUE Xixi1, JIN Ling4, WU Bin4*   

  1. 1. Department of Nutrition;
    2. Department of Nuclear Medicine;
    3. Training Center of Health Service;
    4. Department of Geriatrics,General Hospital of Xinjiang Military Command, Urumqi 830000, China
  • Received:2023-03-01 Revised:2023-06-01 Online:2023-10-05 Published:2023-10-05
  • Contact: *wubin0917@163.com

摘要: 目的 探讨抑制抗增殖蛋白2(PHB2)表达对非小细胞肺癌细胞系A549凋亡的影响及机制。方法 慢病毒感染非小细胞肺癌细胞系A549,建立敲减PHB2的稳转细胞株,用动力相关蛋白1(DRP1)抑制剂Mdivi-1处理敲减PHB2的A549细胞。Western blot检测PHB2、p-DRP1(Ser616)和DRP1蛋白表达水平;TUNEL染色和annexin V-FITC/PI双染检测细胞凋亡;MitoTracker染色评估线粒体分裂情况;用相应试剂盒检测线粒体含量、柠檬酸合酶活性和细胞色素c含量。结果 与shCtrl组相比,shPHB2组A549细胞凋亡率增加(P<0.05),DRP1介导的线粒体分裂增加(P<0.05),ATP含量减少(P<0.05),柠檬酸合酶活性降低(P<0.05),线粒体内细胞色素c减少(P<0.05)。与shPHB2组相比,shPHB2+Mdivi-1组A549细胞凋亡率减少(P<0.05),DRP1介导的线粒体分裂减少(P<0.05),ATP含量增加(P<0.05),柠檬酸合酶活性增加(P<0.05),线粒体内细胞色素c增加(P<0.05)。结论 抑制PHB2促进A549细胞凋亡,其机制可能与促进DRP1介导的线粒体分裂有关。

关键词: 抗增殖蛋白2, 线粒体分裂, 非小细胞肺癌, 动力相关蛋白1, 凋亡

Abstract: Objective To explore mechanism of prohibitin 2(PHB2) inhibition on the apoptosis of non-small cell lung cancer cell line A549. Methods For stable knockdown of PHB2, A549 strain was infected with lentiviruses. A549 cells with PHB2 depletion were incubated with Mdivi-1(DRP1 inhibitor). Apoptotic index of A549 cells was evaluated by TUNEL and annexin V-FITC/PI. Mitochondrial morphology was visualized by MitoTracker. ATP content, citrate synthase activity and the level of cytochrome c in cytosolic and mitochondrial fractions were analyzed by commercially available kits. Western blot was used to measure the levels of PHB2, DRP1 and p-DRP1 protein expression. Results Compared with the shCtrl group, the apoptosis of A549 cells increased significantly (P<0.05) with up-regulated DRP1-dependent mitochondrial fission (P<0.05), down-regulated ATP content (P<0.05) and citrate synthase activity (P<0.05). The level of cytochrome C was decreased in mitochondrial fractions (P<0.05). Compared with the shPHB2 group, the apoptosis of A549 cells decreased significantly (P<0.05) with alleviated DRP1-dependent mitochondrial fission (P<0.05), increase of ATP content (P<0.05) and citrate synthase activity(P<0.05). The level of cytochrome C was increased in mitochondrial fractions (P<0.05) in the shPHB2+Mdivi-1 group. Conclusions PHB2 inhibition can significantly enhance the apoptosis rate of A549 cells, potentially through promoting DRP1-dependent mitochondrial fission.

Key words: prohibitin 2(PHB2), mitochondrial fission, non-small cell lung cancer, dynamin-related protein 1(DRP1), apoptosis

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