Enhanced uptake of human mesangial cell line to oxidized low density lipoprotein stimulated by interleukin-1β partly through the lectin-like oxidized low-density lipoprotein receptor pathway
10.3760/cma.j.issn.1001-7097.2010.07.008
- VernacularTitle:白细胞介素1β通过植物血凝素样氧化低密度脂蛋白受体1途径促进人肾小球系膜细胞摄取氧化低密度脂蛋白
- Author:
Hua LIU
;
Hang LI
;
Jianling TAO
;
Yubing WEN
;
Guojuan ZHANG
;
Xuewang LI
- Publication Type:Journal Article
- Keywords:
Mesangial cells;
Interleukin-1beta;
Receptors,oxidized LDL;
Lipoproteins,LDL
- From:
Chinese Journal of Nephrology
2010;26(7):520-524
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analysis if intedeukin-1β (IL-1β) can regulate human mesangial cells (HMC) to uptake oxidized low density lipoprotein (Ox-LDL) and if the effect of IL-lβ be changed through the lectin-like oxidized low-density lipoprotein receptor 1 (LOX-l)pathway. Methods The uptake of HMC to Ox-LDL stimulated by IL-1β was observed using Oil Red "O" and flow cytometry. The level of LOX-1 in HMC induced by IL-1β and Ox-LDL was examined using real-time PCR and Western blotting. Results Uptake of Ox-LDL and Dil-Ox-LDL by HMC was up-regulated upon stimulation with IL-1β in a dose- and time-dependent manner. Intracellular mean fluorescence density of Dil-Ox-LDL with LOX-1 blocker in IL-1β stimulation group was decreased compared to that without blocker. The peak level of LOX-1 mRNA reached after 6 h of stimulation and was as high as 6.87-fold of control. IL-1β could induce LOX-1 mRNA expression in a dose-dependent manner. Treated with 10 μg/L IL-1β for 12 h, the upregulation effect on LOX-1 mRNA was as high as 6.57-fold of control. IL-1β could induce LOX-1 protein expression in a time- and dose-dependent manner. The peak level of LOX-1 protein reached after 24 h of stimulation of 5 μg/L IL-1β and was as high as 1.88-fold of control. Treated with 10 μg/L IL-1β for 24 h, the up-regulation effect on LOX-1 protein reached peak and was as high as 2.57-fold of control. IL-1β could induce LOX-1 mRNA and protein expression in a dosedependent manner. Conclusion The expression of LOX-1 can be up-regulated by IL-1β in a dose-dependent manner and the enhanced uptake of HMC to Ox-LDL stimulated by IL-1β partly through the LOX-1 pathway, which means the dyslipidemia of HMC can be enhanced by inflammatory cytokines.
