目的:探讨通过阻断花生四烯酸(arachidonic acid,AA)代谢途径抑制胰腺癌细胞增殖.方法:将胰腺癌细胞SW1990分为对照组,M K886干预组、塞莱昔布(C e l e c o x i b)干预组,MK886+Celecoxib干预组,用RT-PCR法检测细胞白三烯B4受体1(leukot...目的:探讨通过阻断花生四烯酸(arachidonic acid,AA)代谢途径抑制胰腺癌细胞增殖.方法:将胰腺癌细胞SW1990分为对照组,M K886干预组、塞莱昔布(C e l e c o x i b)干预组,MK886+Celecoxib干预组,用RT-PCR法检测细胞白三烯B4受体1(leukotriene B4receptor 1,BLT1)mRNA,血管内皮生长因子(vascular endothelial growth factor,VEGF)mRNA的表达量变化,用Western blot检测磷酸化-Erk(phosphorylated-extracellular regulated protein,p-Erk)表达量变化.结果:MK886作用下,BLT1 mRNA、VEGF mRNA等表达量均减少(P<0.01),p-Erk表达量明显减少(P<0.05),Celecoxib作用下,VEGF mRNA表达量明显减少(P<0.01),BLT1 mRNA表达与对照组无明显差异,p-Erk表达量与MK886组比较明显增加(P<0.01),MK886+80?mol/L Celecoxib作用下,BLT1 mRNA、VEGF mRNA表达量明显减少(P<0.01),p-Erk表达量与对照组无明显差异.结论:花生四烯酸的两条代谢途径均与胰腺癌的发生及增殖均有密切关系,而抑制5-脂氧合酶(5-lipoxygenase)途径较环氧化酶2(cyclooxygenase 2)途径相比,抑制肿瘤细胞增殖作用更强.展开更多
AIM:To investigate the ability of curcumin to counteract the impact of bile acids on gene expression of esophageal epithelial cells.METHODS:An esophageal epithelial cell line(HET1A)was treated with curcumin in the pre...AIM:To investigate the ability of curcumin to counteract the impact of bile acids on gene expression of esophageal epithelial cells.METHODS:An esophageal epithelial cell line(HET1A)was treated with curcumin in the presence of deoxycholic acid.Cell proliferation and viability assays were used to establish an appropriate dose range for curcumin.The combined and individual effects of curcumin and bile acid on cyclooxygenase-2(COX-2)and superoxide dismutase(SOD-1 and SOD-2)gene expression were also assessed.RESULTS:Curcumin in a dose range of 10-100μmol/L displayed minimal inhibition of HET-1A cell viability.Deoxycholic acid at a concentration of 200μmol/L caused a 2.4-fold increase in COX-2 gene expression compared to vehicle control.The increased expression of COX-2 induced by deoxycholic acid was partially reversed by the addition of curcumin,and curcumin reduced COX-2 expression 3.3-to 1.3-fold.HET-1A cells exposed to bile acid yielded reduced expression of SOD-1 and SOD-2 genes with the exception that high dose deoxycholic acid at 200μmol/L led to a 3-fold increase in SOD-2 expression.The addition of curcumin treatment partially reversed the bile acid-induced reduction in SOD-1 expression at all concentrations of curcumin tested.CONCLUSION:Curcumin reverses bile acid suppression of gene expression of SOD-1.Curcumin is also able to inhibit bile acid induction of COX-2 gene expression.展开更多
文摘目的:探讨通过阻断花生四烯酸(arachidonic acid,AA)代谢途径抑制胰腺癌细胞增殖.方法:将胰腺癌细胞SW1990分为对照组,M K886干预组、塞莱昔布(C e l e c o x i b)干预组,MK886+Celecoxib干预组,用RT-PCR法检测细胞白三烯B4受体1(leukotriene B4receptor 1,BLT1)mRNA,血管内皮生长因子(vascular endothelial growth factor,VEGF)mRNA的表达量变化,用Western blot检测磷酸化-Erk(phosphorylated-extracellular regulated protein,p-Erk)表达量变化.结果:MK886作用下,BLT1 mRNA、VEGF mRNA等表达量均减少(P<0.01),p-Erk表达量明显减少(P<0.05),Celecoxib作用下,VEGF mRNA表达量明显减少(P<0.01),BLT1 mRNA表达与对照组无明显差异,p-Erk表达量与MK886组比较明显增加(P<0.01),MK886+80?mol/L Celecoxib作用下,BLT1 mRNA、VEGF mRNA表达量明显减少(P<0.01),p-Erk表达量与对照组无明显差异.结论:花生四烯酸的两条代谢途径均与胰腺癌的发生及增殖均有密切关系,而抑制5-脂氧合酶(5-lipoxygenase)途径较环氧化酶2(cyclooxygenase 2)途径相比,抑制肿瘤细胞增殖作用更强.
文摘AIM:To investigate the ability of curcumin to counteract the impact of bile acids on gene expression of esophageal epithelial cells.METHODS:An esophageal epithelial cell line(HET1A)was treated with curcumin in the presence of deoxycholic acid.Cell proliferation and viability assays were used to establish an appropriate dose range for curcumin.The combined and individual effects of curcumin and bile acid on cyclooxygenase-2(COX-2)and superoxide dismutase(SOD-1 and SOD-2)gene expression were also assessed.RESULTS:Curcumin in a dose range of 10-100μmol/L displayed minimal inhibition of HET-1A cell viability.Deoxycholic acid at a concentration of 200μmol/L caused a 2.4-fold increase in COX-2 gene expression compared to vehicle control.The increased expression of COX-2 induced by deoxycholic acid was partially reversed by the addition of curcumin,and curcumin reduced COX-2 expression 3.3-to 1.3-fold.HET-1A cells exposed to bile acid yielded reduced expression of SOD-1 and SOD-2 genes with the exception that high dose deoxycholic acid at 200μmol/L led to a 3-fold increase in SOD-2 expression.The addition of curcumin treatment partially reversed the bile acid-induced reduction in SOD-1 expression at all concentrations of curcumin tested.CONCLUSION:Curcumin reverses bile acid suppression of gene expression of SOD-1.Curcumin is also able to inhibit bile acid induction of COX-2 gene expression.
