榄香烯或热休克对人肝癌细胞HepG_2 HSP70膜表达及多种HSP基因表达的影响  

Influence of elemene or heat shock treatment upon the expression of membrane HSP70 and HSPs genes in HepG_2 cells

作　　者：高志红[1] 郭连英[1] 沈杰[1] 黄琳[1] 施广霞[1] 钱振超[1] 

机构地区：[1]大连医科大学肿瘤生物治疗研究所,大连116027

出　　处：《中国免疫学杂志》2002年第11期790-794,共5页Chinese Journal of Immunology

基　　金：国家自然科学基金重点项目 (No ;3 973 0 44 0 -II);高等学校骨干教师资助计划项目资助

摘　　要：目的 :研究榄香烯或热休克对人肝癌细胞HepG2 HSP70膜表达及多种HSP基因表达的影响。方法 :免疫荧光和FCM观察榄香烯 (5 0 μg ml,1h)或热休克 (42℃ ,1h)处理后肿瘤细胞HSP70的膜表达 ,放线菌素D阻断基因转录。应用人类基因表达谱芯片分析经榄香烯或热休克处理的人肝癌细胞HepG2 多种热休克蛋白基因及与热休克蛋白调控相关基因表达谱的改变。结果 :榄香烯或热休克处理 1h后 ,肿瘤细胞膜表面HSP70的表达均有增高 ,而以榄香烯处理为明显 ,放线菌素D的加入在两种处理中均增高了HSP70膜表达的阳性率。两种处理均使细胞的HSP70HP(EnhancerProtein)基因表达增高 ,而以热休克处理为更明显 ,HSPA2的表达均有所下降 ,也以热休克处理更明显 ,HSF1基因在热休克处理为上调 ,而在榄香烯处理则为下调 ,与肿瘤免疫密切相关的HSP70、HSP72、HSP75及HSP90、gp96基因的表达则没有变化。结论 :榄香烯较热休克处理早期能更多地促进HepG2 细胞HSP70的膜表达 ,其机制可能是与其改变胞内已存在的HSP70的分布 ,和 或促进HSP70mRNA的翻译有关。两种处理均能改变与HSPs调控相关基因的表达 ,并可引起HSPA2基因表达下调。Objective:To study the influnence of elemene or heat shock treatment upon the expression of membrane HSP70 and HSPs genes in HepG 2 cells.Methods:HSP70 expression was observed by immunofluorescence and FCM techniques.HSP70 gene transcription was blocked by ActD.Genechip was used to study the expression of HSPs genes and the genes associated with the control of HSPs transcription.Results:The treatment of either elemene(50 μg/ml,1 h) or heat shock(42℃,1 h)could increase the membrane expression of HSP70,ActD had a synergistic action with both treatments.HSP70EP(Enhancer Protein) gene was up regulated and HSPA2 gene was down regulated in both treatments.HSF1 gene was up regulated in heat shock treatment but down regulated in elemene treatment.The genes closely correlated with tumor immune,such as HSP70,HSP72,HSP75,HSP90 and gp96 were not changed.Conclusion:Comparing with heat shock treatment,elemene can cause a higher percent of HSP70 membrane expression in HepG 2 cells and that may be caused by its altering the distribution of the already existing HSP70 and/or accelerating the HSP70 mRNA translation.Both treatments can change the expression of genes associated with the transcription control factors of HSPs and decrease HSPA2 gene expression.

关 键 词：榄香烯 热休克 人肝癌细胞 HepG2HSP70膜 HSP 基因表达 

分 类 号：R730.5[医药卫生—肿瘤] R73－3[医药卫生—临床医学]