›› 2012, Vol. 24 ›› Issue (1): 6-9.doi: 10.3969/j.issn.1004-616x.2012.01.002

• 论著 • 上一篇    下一篇

1,4-苯醌致人胚肺成纤维细胞的凋亡效应与调控机制

熊梦祯,张 娟,孙蓉丽,尹立红,浦跃朴   

  1. 东南大学公共卫生学院环境医学工程教育部重点实验室,江苏 南京 210009
  • 收稿日期:2011-06-13 修回日期:2011-07-14 出版日期:2012-01-30 发布日期:2012-01-30
  • 通讯作者: 浦跃朴

Apoptotic effect and regulatory mechanism of 1, 4-benzoquinone on HELF cells

XIONG Meng-zhen,ZHANG Juan,SUN Rong-li,YIN Li-hong,PU Yue-pu   

  1. Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health,Southeast University, Nanjing Jiangsu 210009, China
  • Received:2011-06-13 Revised:2011-07-14 Online:2012-01-30 Published:2012-01-30
  • Contact: PU Yue-pu

摘要: 目的: 研究1,4-苯醌 (1,4-benzoquinone,PBQ ) 对人胚肺成纤维细胞(human embryonic lung fibroblast,HELF)的凋亡效应与调控机制。 方法:分别用不同浓度(10、20、40、60、80 μmol/L)的PBQ处理HELF细胞24 h和40 μmol/L PBQ处理HELF细胞24 、48、72 h后,应用噻唑蓝(MTT)比色法检测PBQ对HELF细胞增殖的抑制作用,以PI单染法检测细胞周期的改变,用Annexin-Ⅴ/PI双染法检测细胞凋亡,以实时荧光PCR法检测Bax、Bcl-2、p53 mRNA表达水平的改变。结果:与对照组相比,不同PBQ染毒浓度下作用24 h后,随PBQ浓度增加,细胞相对增殖率显著下降 (P<0.05),G0/G1期细胞下降(在40和60 μmol/L时, P <0.05),S期细胞增加 (P <0.05),以40 μmol/L PBQ浓度作用于HELF细胞不同时间,随着染毒时间的增加其相对增殖率和S期细胞均下降 (P<0.05),而G0/G1期细胞随着染毒时间的增加呈上升趋势(P<0.05);当染毒浓度大于20 μmol/L时,染毒24 h可诱导HELF细胞产生凋亡,凋亡率随着染毒时间的增加而上升,与对照组相比差异具有统计学意义 (P <0.05);不同浓度的PBQ染毒24 h,细胞的Bax、Bcl-2、p53 mRNA表达水平均上调。40 μmol/L PBQ作用不同时间后,Bax、p53 mRNA水平随着染毒时间的增加而上升,与对照组相比差异均具有统计学意义 (P均 <0.05);Bcl-2随染毒时间增加而下降,48和72 h时与对照组相比差异具有统计学意义 (P <0.05);Bax/Bcl-2比值随染毒时间增加而增加,与对照组相比差异具有统计学意义 (P <0.05)。结论:PBQ能抑制HELF细胞增殖,影响HELF细胞周期分布,诱导细胞发生凋亡,其凋亡机制可能与Bax/Bcl-2比值的上升,及p53 mRNA表达的上调有关。

关键词: 4-苯醌, HELF细胞, 细胞凋亡, Bax/Bcl-2, p53

Abstract: OBJECTIVE: To study the apoptotic effect and regulation of 1,4-benzoquinone(PBQ) on human embryonic lung fibroblast (HELF), cells. METHODS:MTT assay was used to detect the relative growth rate (RGR),cell cycle was determined by single-stained assay with PI and apoptosis was determined by double-stained assay with Annexin-Ⅴand PI using flow cytometry. Bax,Bcl-2,p53 mRNA levels were determined with real-time PCR. RESULTS:The RGRs of HELF cells exposed to different PBQ concentrations after 24 h decreased (P < 0.05),cell cycle distribution was changed at 40 and 60 μmol/L after 24 h (P <0.05). The RGRs of HELF cells exposed to 40 μmol/L PBQ after different times decreased (P <0.05),the rates of G0/G1 phase increased with time (P < 0.05). Apoptosis was induced with PBQ higher than 20μmol/L,and increased with PBQ concentration (P < 0.05). The relative expression levels of Bax,Bcl-2,p53 increased with concentration after exposure for 24 h (P < 0.05). The relative expression levels of Bax and p53 exposed at 40μmol/L increased with time (P < 0.05),while bcl-2 decreased with time (P < 0.05),with Bax/Bcl-2 ratio increased with time (P < 0.05). CONCLUSION:PBQ was able to change cell cycle distribution of HELF cells,and induce apoptosis,with dose-response and time-response effects. The up-regulation of mRNA expression level of p53 and the elevated Bax/Bcl-2 ratio may be the mechanisms for apoptosis of HELF cells after PBQ exposure.

Key words: 4-benzoquinone, HELF cell, cell apoptosis, Bax/Bcl-2, p53