吉林大学学报(医学版) ›› 2022, Vol. 48 ›› Issue (4): 915-921.doi: 10.13481/j.1671-587X.20220410

• 基础研究 • 上一篇    下一篇

丁酸钠联合电离辐射对肺癌A549细胞凋亡的影响及其机制

郎庆旭1,牛雪霜2,杨凯文1,张韧1,王思腾1,祖米热提古丽·吾买尔null1,王珍琦1()   

  1. 1.吉林大学公共卫生学院 国家卫健委放射生物学重点实验室,吉林 长春 130021
    2.北华大学;医学技术学院,吉林 吉林 132013
  • 收稿日期:2021-07-19 出版日期:2022-07-28 发布日期:2022-07-26
  • 通讯作者: 王珍琦 E-mail:wangzq@jlu.edu.cn
  • 作者简介:郎庆旭(1996-),女,辽宁省朝阳市人,在读硕士研究生,主要从事辐射肿瘤学方面的研究。
  • 基金资助:
    吉林省卫健委卫生健康科技能力提升项目(2021JC039);吉林省科技厅科技发展计划项目(20160101227JC);吉林大学大学生创新创业训练计划项目(S202110183523)

Effects of sodium butyrate combined with ionizing radiation on apoptosis of lung cancer A549 cells and its mechanism

Qingxu LANG1,Xueshuang NIU2,Kaiwen YANG1,Ren ZHANG1,Siteng WANG1, ZUMIRETIGULI·Wumaier1,Zhenqi WANG1()   

  1. 1.Key Laboratory of Radiobiology of NHC,School of Public Health,Jilin University,Changchun 130021,China
    2.College of Medical Technology,Beihua University,Jilin 132013,China
  • Received:2021-07-19 Online:2022-07-28 Published:2022-07-26
  • Contact: Zhenqi WANG E-mail:wangzq@jlu.edu.cn

摘要: 目的

研究组蛋白去乙酰化酶抑制剂(HDACi)丁酸钠(NaBt)单独或联合X射线照射对人非小细胞肺癌(NSCLC)A549细胞凋亡的影响,并阐明其作用机制。

方法

处于对数生长期的A549细胞分为对照组、NaBt组、4 Gy X射线照射组和NaBt联合4 Gy X射线照射组。照射后24和48 h,采用流式细胞术检测各组细胞凋亡率;照射后6 h,采用流式细胞术检测各组细胞的线粒体膜电位(Δψm)和活性氧(ROS)水平;照射后24 h,采用实时荧光定量PCR(RT-qPCR)法检测各组细胞中半胱氨酸天冬氨酸蛋白酶3(caspase-3)和p21 mRNA表达水平。

结果

照射后24和48 h,与对照组、4 Gy X射线照射组和NaBt组比较,NaBt联合4 Gy X射线照射组细胞凋亡率明显升高(P<0.05或P<0.01);照射后48 h,与对照组比较,NaBt组细胞凋亡率明显升高(P<0.01)。NaBt单独或联合4 Gy X射线作用A549细胞6 h后,与对照组、4 Gy X射线照射组和NaBt组比较,NaBt联合4 Gy X射线照射组细胞Δψm均明显降低(P<0.05或P<0.01)。与对照组比较,NaBt组和NaBt联合4 Gy X射线照射组细胞中ROS水平均明显升高(P<0.05);与4 Gy X射线照射组比较,NaBt联合4 Gy X射线照射组细胞中ROS水平升高(P<0.05)。NaBt单独或联合4 Gy X射线作用A549细胞24 h后,与对照组、4 Gy X射线照射组和NaBt组比较,NaBt联合4 Gy X射线照射组细胞中caspase-3 和p21 mRNA表达水平均明显升高(P<0.01);与对照组比较,NaBt组和4 Gy X射线照射组细胞中p21 mRNA水平均明显升高(P<0.01)。

结论

NaBt可以诱导A549细胞凋亡,其机制可能涉及到线粒体凋亡通路的调控。

关键词: 组蛋白去乙酰化酶抑制剂, 丁酸钠, 非小细胞肺癌, 细胞凋亡, 线粒体膜电位

Abstract: Objective

To explore the effects of histone deacetylase inhibitor (HDACi) sodium butyrate (NABT) alone or combined with X-ray irradiation on the apoptosis of human non-small cell lung cancer A549 cells, and to clarify its mechanism.

Methods

The A549 cells in logarithmic growth phase were divided into control group, NaBt group, 4 Gy X-ray irradiation group and NaBt combined with 4 Gy X-ray irradiation group. Flow cytometry was used to detect the apoptotic rates at 24 and 48 h after treatment. After 6 h of irradiation, the mitochondrial membrane potential (Δψm) and ROS (reative oxygen species) levels in the cells of various groups were analyzed by flow cytometry. After 24 h of irradiation, the expression levels of caspase-3 and p21 mRNA in the cells in various groups were detected by real-time quantitative PCR (RT-qPCR).

Results

After 4 Gy irriadiation for 24 and 48 h, compared with control group, 4 Gy X-ray irradiation group and NaBt group, the apoptotic rate of cells in NaBt combined with 4 Gy X-ray irradiation group was significantly increased (P<0.05 or P<0.01). Compared with control group, the apoptotic rate of cells in NaBt group was significantly increased after 48 h of irradiation (P<0.01). After treated with NaBt alone or combined with 4 Gy X-ray for 6 h, compared with control group, 4 Gy X-ray irradiation and NaBt group, the Δψm of A549 cells in NaBt combined with 4 Gy X-ray irradition group was decreased (P<0.05). Compared with control group, the ROS levels in NaBt group and NaBt combined with 4 Gy X-ray irradiation group were increased (P<0.05). Compared with 4 Gy X-ray irradiation group, the ROS level in NaBt combined with 4 Gy X-ray irradiation group was increased (P<0.05). After treated with NaBt alone or combined with 4 Gy X-ray irradiation for 24 h, the mRNA levels of caspase-3 and p21 in the cells in NaBt combined with 4 Gy X-ray irradiation group were significantly higher than those in control group, 4 Gy X-ray irriadiation group and NaBt group (P<0.01). Compared with control group, the p21 mRNA levels in NaBt group and 4 Gy X-ray irriadiation group were significantly increased (P<0.01).

Conclusion

NaBt can induce the apoptosis of A549 cells, and its mechanisms may be related to the regulation of mitochondrial apoptosis pathway.

Key words: Histone deacetylase inhibitor, Sodium Butyrate, Non-small cell lung cancer, Apoptosis, Mitochondrial membrane potential

中图分类号: 

  • R734.2