腺病毒介导的热休克蛋白70表达对神经元氧化应激损伤的保护作用

目的探讨重组腺病毒介导的HSP70表达对过氧化氢（H2O2）诱导的神经元和胶质细胞损伤的保护作用。方法用携带全长HSP70基因的重组腺病毒vAd-HSP70感染体外培养的神经元和胶质细胞,RT-PCR、West-ern blotting检测靶细胞中外源性HSP70的表达。vAd-HSP70感染组、vAd-GFP感染组和未感染组细胞经0.5 mmol/L的H2O2处理后,MTT检测细胞活力,乳酸脱氢酶（LDH）检测试剂盒检测细胞培养上清液中LDH活力,透射电镜观察细胞超微结构变化。结果vAd-HSP70感染组的细胞可检测到外源性HSP70基因表达。H2O2处理后,vAd-HSP70感染组细胞活力较其他组明显增强（P〈0.01）,vAd-HSP70感染组、vAd-GFP感染组、未感染组细胞培养上清液中LDH活力分别为（976±106）、（1 332±197）、（1 380±121）,差异有统计学意义（P〈0.01）。电镜结果显示,vAd-HSP70感染组细胞膜较vAd-GFP感染组和未感染组完整清晰,无明显线粒体肿胀及细胞核溶解等不可逆损伤情况。结论腺病毒介导的外源性HSP70表达可保护神经元和胶质细胞抵抗H2O2损伤,具有明确的细胞保护作用。

Protective Effects of Adenovirus-mediated Heat Shock Protein 70 on Neurons and Glial Cell Injury Induced by Oxidative Stress

Objective To investigate the protective effects of recombinant adenovirus-mediated heat shock protein 70(HSP70) on neurons and glial cell injury induced by oxidative stress.Methods Cultured neurons and glial cells were divided into groups A(vAd-HSP70 infected,carrying whole long human HSP70 gene),B(vAd-GFP infected) and C(non-infected).After cells were treated by 0.5 mmol / L hydrogen peroxide(H_2O_2),cell viability was detected by MTT,lactate dehydrogenase(LDH) activity in cell culture supernatant by LDH d...