苯并(a)芘作用下的A549细胞株热休克蛋白70家族多态性表达

目的 研究不同浓度苯并(a)芘(BaP)作用下A549细胞株热休克蛋白70家族(HSP70)多态性表达规律及其可能的意义。方法 利用二维聚丙烯酰胺凝胶电泳(2D-PAGE)技术分析A549细胞株中HSP70家族多态性表达。结果 A549细胞接受不同浓度BaP(0.1、1.0、5.0、10.0μmol/L)染毒24、48 h后,随着染毒剂量的逐步增加,HSP70家族中HSP72亚型的表达水平呈现逐渐下降的趋势(染毒24 h后积分光密度值分别为:150.36±26.03、98.57±1.3.34、64.92±15.03、34.65±19.10、32.92.±18.71;染毒48 h后分别为:126.85±17.41、106.19±15.32、73.64±21.02、35.18 ±11.95、16.27±9.35),而HSP73亚型的表达水平在不同浓度BaP染毒作用下无明显变化(染毒24 h后积分光密度值分别为:102.29±21.24、87.71±18.70、71.19±14.08、71.87±15.16、72.78±17.31;染毒48 h后分别为:86.66±16.86、75.67±10.61、66.83±12.63、67.29±10.26、91.37±13.68)。结论BaP对于HSP72表达有抑制作用,并且具有一定的剂量-效应关系,而对HSP73表达未见明显影响。

Expression of the heat-shock protein 70 family polymorphism in A549 cell line exposed to benzo(a)pyrene

OBJECTIVE: To study the pattern of polymorphism expression of heat-shock protein 70 (HSP70) family in A549 cell line treated with different concentrations of benzo(a)pyrene (BaP) and its probable biological effect. METHOD: Two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) was used for the HSP70 expression analysis. RESULTS: 2D-PAGE showed that when A549 cells were exposed to different concentrations of BaP (0.1, 1.0, 5.0, 10.0 micromol/L) for 24, 48 h respectively, the HSP72 in A549 gradually declined as BaP concentrations increased the integral OD (IOD)] for 24 h were: 150.36 +/- 26.03, 98.57 +/- 13.34, 64.92 +/- 15.03, 34.65 +/- 19.10, 32.92 +/- 18.71 respectively, for 48 h: 126.85 +/- 17.41, 106.19 +/- 15.32, 73.64 +/- 21.02, 35.18 +/- 11.95, 16.27 +/- 9.35 respectively), while the IOD of HSP73 did not show any remarkable change (24 h: 102.29 +/- 21.24, 87.71 +/- 18.70, 71.19 +/- 14.08, 71.87 +/- 15.16, 72.78 +/- 17.31 respectively; 48 h: 86.66 +/- 16.86, 75.67 +/- 10.61, 66.83 +/- 12.63, 67.29 +/- 10.26, 91.37 +/- 13.68 respectively). CONCLUSION: BaP can inhibit HSP72 expression and with certain dose-effect relationship, but cannot affect HSP73 expression.