Over-expression of suppressor of cytokine signaling 3 inhibits the proliferation of human mesangial cells stimulated by aggregated IgA1 from IgA nephropathy patients
10.3760/cma.j.issn.1001-7097.2017.08.009
- VernacularTitle:细胞因子信号转导抑制因子3过表达对IgA肾病患者IgA1刺激人肾小球系膜细胞增殖的抑制作用
- Author:
Jiayan HUANG
;
Liu YANG
;
Lei JIANG
;
Yan YAN
;
Laimin LUO
;
Jing ZHOU
;
Qinkai CHEN
;
Jun XIAO
- Keywords:
Glomerulonephritis,IGA;
Mesangial cells;
Cell proliferation;
Suppressor of cytokine signaling 3
- From:
Chinese Journal of Nephrology
2017;33(8):616-622
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effect of suppressor of cytokine signaling 3 (SOCS3)on the proliferation of human mesangial cells stimulated by aggregated IgA1 (aIgA1) from patients with IgA nephropathy(IgAN),and explore its possible mechanism.Methods Serum monomeric IgA1 was isolated with jacalin affinity and Sephacryl S-200 HR chromatography from IgAN patients,and then heated to aggregated form (aIgA1).Human glomerular mesangial cells(HMC) were transfected with AdvSOCS3-IRES2-EGFP for 48 hours,and incubated with aIgA1 for 12-48 h.The cells were divided into blank control group,IgA1 group,IgA1 +Adv-EGFP group and IgA 1 +Adv-SOCS3-IRES2-EGFP group.The mesangial cell proliferation was observed through MTT,and the levels of SOCS3,TLR4,TGF-β1 protein and mRNA were detected through Western blotting and real-time PCR.Results HMC proliferation was promoted significantly after IgA1 stimulated at 24 h.Compared with control group,the protein and mRNA expression of SOCS3,TLR4,TGF-β1 were significantly increased in IgA1 group (P ＜ 0.05).Compared with IgA1 group and IgA1 +Adv-EGFP group,MTT absorbency was obviously reduced after incubation with aIgA1 for 24 h and 48 h in IgA+Adv-SOCS3-IRES2-EGFP group,and the protein and mRNA expression of TLR4 and TGF-β1 were significantly decreased in IgA1 +AdvSOCS3-EGFP group (P＜ 0.05).Conclusion Over-expression of SOCS3 may inhibit the proliferation of HMC stimulated by aIgA1,partly through down-regulating the expression of TLR4 and TGF-β1.
