HMGB1/SREBP-1参与IFN-γ介导的小鼠系膜细胞内的脂质沉积
首发时间:2012-06-26
摘要:目的:探讨IFN-γ诱导小鼠系膜细胞内脂质沉积的可能机制。方法:常规培养的小鼠系膜细胞分为正常对照组、刺激组、刺激 +空质粒组和刺激+质粒组(sh-HMGB1或sh-SREBP-1);油红O染色观察细胞内脂质沉积;RT-PCR检测HMGB1、SREBP-1和FAS mRNA表达;Wesernbloting检测蛋白表达。结果:油红O检测显示IFN-γ刺激组MMC细胞中出现明显脂滴;IFN-γ刺激能够上调HMGB、SREBP-1和FAS mRNA及蛋白表达;沉默HMGB1能够降低IFN-γ诱导的SREBP-1和FAS上调,并减少细胞内脂质沉积;沉默SREBP-1能够减少HMGB诱导的MMC细胞内脂质沉积。结论:IFN-γ可能通过上调HMGB/SREBP-1/FAS的表达促进小鼠系膜细胞内脂滴沉积。
关键词: IFN-γ 小鼠系膜细胞 脂质沉积 高迁移率族蛋白1 固醇调节元件结合蛋白-1
For information in English, please click here
HMGB1/SREBP-1 mediated IFN-γ-induced lipid deposition in mouse mesangial cells
Abstract:Objective: To explore the possible mechanism of lipid deposition induced by IFN-γ. Methods: The MMC cells were randomly divided into control group, stimulation group, stimulation +control vector group and stimulation + specific sh-vector group (sh-HMGB1 or sh-SREBP-1). RT-PCR was used to detect the expression of HMGB1, SREBP-1 and FASmRAN;the protein expression was determined by western blotting. Results: The Oil Red O staining revealed that the mouse mesangial cells showed significant lipid droplet in IFN-γ group. IFN-γ up-regulated the expression of HMGB1, SREBP-1,FAS mRNA and protein time-dependently ; Transfection of MMC cells with HMGB1 siRNA resulted in the suppression of SREBP-1, FAS protein levels induced by IFN-γ, following with decrease of lipid deposition. Stimulation with HMGB1 markedly induced expression of SREBP-1, FAS expression and peaked at 8h, decreased at 12h compared with that at 8h. Sh-SREBP-1 decreased the lipid deposition induced by HMGB1 in MMC cells. Conclusion: IFN-γ might induce lipid deposition in mouse mesangial cells partly by up-regulating the expression of HMGB1/SREBP-1/FAS.
Keywords: IFN-γ mouse mesangial cells lipid deposition HMGB1 SREBP-1
论文图表:
引用
No.****
同行评议
共计0人参与
勘误表
HMGB1/SREBP-1参与IFN-γ介导的小鼠系膜细胞内的脂质沉积
评论
全部评论0/1000