吉林大学学报(医学版) ›› 2021, Vol. 47 ›› Issue (1): 152-157.doi: 10.13481/j.1671-587x.20210121

• 基础研究 • 上一篇    下一篇

丁酸钠联合X射线照射对肺癌A549细胞增殖的抑制作用及其对细胞周期的影响

李官虎1,郎庆旭1,刘纯岩2,刘沁1,耿梦柔1,李晓倩1,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.吉林大学第二医院放射线科,吉林 长春 130041
  • 收稿日期:2020-01-19 出版日期:2021-01-28 发布日期:2021-01-27
  • 通讯作者: 王珍琦 E-mail:wangzq@jlu.edu.cn
  • 作者简介:李官虎(1992-), 男,吉林省延吉市人,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:
    吉林省科技厅科技发展计划项目(20160101227JC);吉林省卫生厅卫生计生科研计划项目(20152005);吉林省教育厅“十三五”科学技术项目(JJKH20170826KJ);吉林大学大学生创新创业训练计划项目(202010183443)

Inhibitory effect of sodium butyrate combined with X- irradiation on proliferation of lung cancer A549 cells and its influence in cell cycle

Guanhu LI1,Qingxu LANG1,Chunyan LIU2,Qin LIU1,Mengrou GENG1,Xiaoqian LI1,Zhenqi WANG1()   

  1. 1.Key Laboratory of Radiobiology of NHC,School of Public Health,Jilin University,Changchun 130021,China
    2.Department of Radiology,Second Hospital,Jilin University,Changchun 130041,China
  • Received:2020-01-19 Online:2021-01-28 Published:2021-01-27
  • 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A549细胞增殖的抑制作用和放射增敏作用,并分析其联合X射线照射对A549细胞周期的影响。

方法

对数生长期的A549细胞分为对照组、不同浓度(5、10、15、20和25 mmol·L-1)NaBt组、4 Gy X射线照射组和不同浓度(5、10、15、20和25 mmol·L-1)NaBt联合4 Gy X射线照射组,分别在作用后24、48和72 h,采用CCK-8法检测各组细胞增殖率。对数生长期的A549细胞分为对照组、10 mmol·L-1 NaBt组、20 mmol·L-1 NaBt组、4 Gy X射线照射组、10 mmol·L-1 NaBt 联合4 Gy X射线照射组和20 mmol·L-1 NaBt 联合 4 Gy X射线照射组,作用后24 h,采用流式细胞术检测各组不同细胞周期A549细胞百分率。

结果

与对照组比较,作用48 h后5、10、15、20和25 mmol·L-1 NaBt组细胞增殖率均明显降低(P<0.05或P<0.01),作用72 h后5、10、15、20和25 mmol·L-1 NaBt组细胞增殖率明显降低(P<0.01),并呈浓度和时间依赖性。作用48 h 后,分别与对照组、4 Gy X射线照射组及相对应浓度NaBt组比较,15、20和25 mmol·L-1 NaBt联合4 Gy X射线照射组细胞增殖率均明显降低(P<0.05或P<0.01);作用72 h后,分别与对照组和4 Gy X射线照射组比较,不同浓度NaBt联合4 Gy X射线照射组细胞增殖率明显降低(P<0.01),且20和25 mmol·L-1 NaBt 联合4 Gy X射线照射组细胞增殖率明显低于相对应浓度NaBt组(P<0.01)。细胞周期检测,作用24 h后,与对照组比较,10和20 mmol·L-1 NaBt组G0/G1期和G2+M期细胞百分率明显升高(P<0.05或P<0.01),S期细胞百分率明显降低(P<0.01);4 Gy X射线照射组和10 mmol·L-1 NaBt联合4 Gy X射线照射组G2+M期细胞百分率明显升高(P<0.01),G0/G1期和S期细胞百分率明显降低(P<0.01)。

结论

NaBt对A549细胞具有增殖抑制作用和放射增敏作用,并呈浓度和时间依赖性,且NaBt和X射线的联合抑制效果明显优于二者单独应用,其机制可能与二者联合引起A549细胞G2+M期阻滞有关。

关键词: 组蛋白去乙酰化酶抑制剂, 丁酸钠, 非小细胞肺癌, 表观遗传学, 辐射敏感性

Abstract: Objective

To study the inhibitory effect and radiosensitization effects of sodium butyrate (NaBt), a histone deacetylase inhibitor (HDACi), on the proliferation of human non-small cell lung cancer A549 cells alone or in combination with X-ray irradiation, and to analyze its combined effect with irradiation on the cell cycle of A549 cells.

Methods

The A549 cells in logarithmic growth phase were divided into control group, different concentrations (5, 10, 15, 20,and 25 mmol·L-1) of NaBt groups, 4 Gy X-ray irradiation group and different concentrations (5, 10, 15, 20,and 25 mmol·L-1) NaBt combined with 4 Gy X-ray irradiation groups. CCK-8 method was used to detect the cell proliferation rates in various groups at 24, 48 and 72 h after treatment. The changes of cell cycle were analyzed by flow cytometry.The A549 cells in logarithmic growth phase were divided into control group, 10 mmol·L-1 NaBt group,20 mmol·L-1 NaBt group, 4 Gy X-ray irradiation group, 10 mmol·L-1 NaBt combined with 4 Gy X-ray irradiation group, and 20 mmol ·L-1 NaBt combined with 4 Gy X-ray irradiation group. At 24 h after treatment, the percentages of A549 cells in each phase of cell cycle in various groups were analyzed.

Results

After 48 h of treatment, the cell proliferation rates in 5,10, 15, 20, and 25 mmol·L-1 NaBt groups were significantly lower than that in control group(P<0.05 or P<0.01);after 72 h of treatment, the cell proliferation rates in 5,10,20,and 25 mmol·L-1 NaBt groups were significantly lower than that in control group(P<0.01) in a concentration- and time-dependent manner;after treated for 48 h, the cell proliferation rates in 15, 20,and 25 mmol·L-1 NaBt combined with 4 Gy X-ray irradiation groups were significantly lower than those in control group,4 Gy X-ray irradiation group and corresponding concentrations of NaBt groups (P<0.05 or P<0.01);after treated for 72 h,compared with control group and 4 Gy X-ray irradiation group,the cell proliferation rates in different concentrations of NaBt combined with 4 Gy X-ray irradiation groups were significantly decreased(P<0.01);the cell proliferation rates in 20 and 25 mmol·L-1 NaBt combined with 4 Gy X-ray irradiation groups were significantly lower than those in corresponding concentrations of NaBt groups(P<0.01).The cell cycle analysis results showed that after 24 h of treatment, compared with control group, the percentages of A549 cells in G0 / G1 phase and G2 + M phase in 10 and 20 mmol·L-1 NaBt groups were significantly increased (P<0.05 or P<0.01), and the percentage of A459 cells in S phase was significantly decreased (P<0.01); the percentages of cells in G2+M phase in 4 Gy X-ray irradiation group and 10 mmol·L-1 NaBt combined with 4 Gy X-ray irradiation group were significantly increased (P<0.05 or P<0.01),and the percentages of cells in G0/G1 phase and S phase were significantly decreased (P<0.01).

Conclusion

NaBt has the inhibitory effect on the proliferation of A549 cells and radiosensitization effect in a concentration- and time-dependent manner, and the combined inhibitory effect of NaBt and X-ray is better than both of them used alone; its mechanism may be related to G2 + M phase arrest of the A549 cells induced by combination of NaBt and X-ray.

Key words: histone deacetylase inhibitor, sodium butyrate, non- small cell lung cancer, epigenetics, radiosensitivity

中图分类号: 

  • Q691