Objective To investigate the expression levels of serum hypoxia inducible factor 1 alpha(HIF-1α) and vascular endothelial growth factor(VEGF) pre-and post-transcatheter arterial chemoembolization(TACE) in patients wi...Objective To investigate the expression levels of serum hypoxia inducible factor 1 alpha(HIF-1α) and vascular endothelial growth factor(VEGF) pre-and post-transcatheter arterial chemoembolization(TACE) in patients with primary liver cancer(PLC),and correlations between prognosis factors and serum HIF-1α as well as VEGF levels.Methods Forty consecutive patients fulfilling diagnostic criteria for PLC undergoing TACE from March 2008 to May 2009 were enrolled into the study.The serum HIF-1α and VEGF levels of PLC patients pre-and 1 day,1 week,1 month post-TACE were analyzed using ELISA,and compared with that of 20 healthy volunteers.Patients were divided into complete response(CR) and partial response(PR),stable disease(SD),progressive disease(PD) groups according to the therapeutic efficacy.Pearson correlation was used to analyze the correlation between different clinical variables and serum HIF-1α and VEGF levels before TACE,and correlation between serum HIF-1α and VEGF levels was also evaluated.Results The expression levels of serum HIF-1α and VEGF in PLC patients were 154.94±83.29 and 264.00±148.10 pg/mL pre-TACE,and both of them were significantly higher than those in control group(23.84±8.15 and 69.78±21.42 pg/mL,all P<0.01).One day after TACE,both serum HIF-1α(570.64± 230.87 pg/mL) and VEGF levels(362.07±102.25 pg/mL) reached the peak values(all P<0.01).One week post-TACE,expression levels of them were decreased(198.62±92.11 and 283.52±145.46 pg/mL respectively),but still significantly higher than those before TACE(all P<0.01).The levels of both HIF-1α(133.96±57.02 vs.255.74±123.44 pg/mL) and VEGF(150.96±84.89 vs.368.95±161.90 pg/mL) in CR group 1 month post-TACE were significantly lower than those in PR+SD+PD group(all P<0.01).The level of serum HIF-1α was positively correlated with serum VEGF level(r=0.42,P<0.001).Both serum HIF-1α and VEGF levels were observed to be correlated with portal vein tumor thrombi(P<0.05) and metastasis(P<0.05).展开更多
目的:探讨细胞外的热休克蛋白7 0及H S P70肽复合物(h e a t s h o c k p r o t e i n 70/peptide complexes,HSP70/HSP70-PCs)对肝癌细胞HepG2缺氧诱导因子1(hypoxiainduciblefactor-1,HIF-1)、葡萄糖转运蛋白1(glucose transporter 1,...目的:探讨细胞外的热休克蛋白7 0及H S P70肽复合物(h e a t s h o c k p r o t e i n 70/peptide complexes,HSP70/HSP70-PCs)对肝癌细胞HepG2缺氧诱导因子1(hypoxiainduciblefactor-1,HIF-1)、葡萄糖转运蛋白1(glucose transporter 1,Glut1)、血管内皮生长因子(vascular endothelial growth factor,VEGF)表达的影响及可能机制.方法:将肝癌细胞分为3组:正常对照组、细胞外HSP70/HSP70-PCs诱导实验组(终浓度2g/mL)、细胞外HSP70/HSP70-PCs+siRNA转染组.应用Real-time RT-PCR与Western blot法检测HIF-1、Glut1和VEGF的表达变化.结果:细胞外HSP70/HSP70-PCs诱导实验组HIF-1、VEGF与Glut1蛋白表达显著升高,与对照组相比有显著差异(P<0.05),表明细胞外HSP70/HSP70-PCs促进肝癌细胞的HIF-1、Glut1和VEGF表达;应用siRNA阻断HIF-1后,细胞外HSP70/HSP70-PCs对Glut1和VEGF的上调表达作用消失,与对照组相比有明显差异(P<0.05).结论:细胞外HSP70/HSP70-PCs可以上调肝癌细胞HepG2中Glut1和VEGF表达,并且这一作用是通过HIF-1来实现的.展开更多
文摘Objective To investigate the expression levels of serum hypoxia inducible factor 1 alpha(HIF-1α) and vascular endothelial growth factor(VEGF) pre-and post-transcatheter arterial chemoembolization(TACE) in patients with primary liver cancer(PLC),and correlations between prognosis factors and serum HIF-1α as well as VEGF levels.Methods Forty consecutive patients fulfilling diagnostic criteria for PLC undergoing TACE from March 2008 to May 2009 were enrolled into the study.The serum HIF-1α and VEGF levels of PLC patients pre-and 1 day,1 week,1 month post-TACE were analyzed using ELISA,and compared with that of 20 healthy volunteers.Patients were divided into complete response(CR) and partial response(PR),stable disease(SD),progressive disease(PD) groups according to the therapeutic efficacy.Pearson correlation was used to analyze the correlation between different clinical variables and serum HIF-1α and VEGF levels before TACE,and correlation between serum HIF-1α and VEGF levels was also evaluated.Results The expression levels of serum HIF-1α and VEGF in PLC patients were 154.94±83.29 and 264.00±148.10 pg/mL pre-TACE,and both of them were significantly higher than those in control group(23.84±8.15 and 69.78±21.42 pg/mL,all P<0.01).One day after TACE,both serum HIF-1α(570.64± 230.87 pg/mL) and VEGF levels(362.07±102.25 pg/mL) reached the peak values(all P<0.01).One week post-TACE,expression levels of them were decreased(198.62±92.11 and 283.52±145.46 pg/mL respectively),but still significantly higher than those before TACE(all P<0.01).The levels of both HIF-1α(133.96±57.02 vs.255.74±123.44 pg/mL) and VEGF(150.96±84.89 vs.368.95±161.90 pg/mL) in CR group 1 month post-TACE were significantly lower than those in PR+SD+PD group(all P<0.01).The level of serum HIF-1α was positively correlated with serum VEGF level(r=0.42,P<0.001).Both serum HIF-1α and VEGF levels were observed to be correlated with portal vein tumor thrombi(P<0.05) and metastasis(P<0.05).
文摘目的:探讨细胞外的热休克蛋白7 0及H S P70肽复合物(h e a t s h o c k p r o t e i n 70/peptide complexes,HSP70/HSP70-PCs)对肝癌细胞HepG2缺氧诱导因子1(hypoxiainduciblefactor-1,HIF-1)、葡萄糖转运蛋白1(glucose transporter 1,Glut1)、血管内皮生长因子(vascular endothelial growth factor,VEGF)表达的影响及可能机制.方法:将肝癌细胞分为3组:正常对照组、细胞外HSP70/HSP70-PCs诱导实验组(终浓度2g/mL)、细胞外HSP70/HSP70-PCs+siRNA转染组.应用Real-time RT-PCR与Western blot法检测HIF-1、Glut1和VEGF的表达变化.结果:细胞外HSP70/HSP70-PCs诱导实验组HIF-1、VEGF与Glut1蛋白表达显著升高,与对照组相比有显著差异(P<0.05),表明细胞外HSP70/HSP70-PCs促进肝癌细胞的HIF-1、Glut1和VEGF表达;应用siRNA阻断HIF-1后,细胞外HSP70/HSP70-PCs对Glut1和VEGF的上调表达作用消失,与对照组相比有明显差异(P<0.05).结论:细胞外HSP70/HSP70-PCs可以上调肝癌细胞HepG2中Glut1和VEGF表达,并且这一作用是通过HIF-1来实现的.
