Effect of surfactant protein D overexpression on lipopolysaccharide-induced monocyte chemoattractant protein-1 expression in human renal proximal tubular epithelial cells
10.3760/cma.j.issn.1001-7097.2010.08.009
- VernacularTitle:表面活性蛋白D高表达对脂多糖诱导人肾小管上皮细胞单核细胞趋化蛋白1表达的影响
- Author:
Fengqi HU
;
Guohua DING
;
Wei LIANG
;
Jiao LIU
;
Zhilong REN
- Publication Type:Journal Article
- Keywords:
Upopolysaccharides;
Chemokine CCL2;
NF-kappa B;
Surfactant protein D
- From:
Chinese Journal of Nephrology
2010;26(8):609-613
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effect of surfactant protein D(SP-D)overexpression on lipopolysaccharide(LPS)-induced monocyte chemoattractant protein-1(MCP-1)expression in human renal proximal tubular epithelial cells(HK-2)and its mechanism. Methods HK-2 cells were treated with LPS at various concentrations (0, 0.1, 1, 2, 5, 10 mg/L)for 8 h and at 5 mg/L for various time points(0, 2, 4, 8, 16, 24 h). Expression of SP-D was detected by Western blotting and real-time PCR. Expression of MCP-1 was determined by ELISA and real-time PCR. Human SP-D cDNA eukaryotic expression vector pEE14-hSP-D was transfected to HK-2 cells. The changes in transfected cells of SP-D protein were observed by Western blotting. Expression of MCP-1 was detected by ELJSA and real-time PCR. Results SP-D was expressed in HK-2 cells. The levels of SP-D protein and mRNA in HK-2 cells were significantly decreased after treatment with LPS(P<0.05). Expression of MCP-1 protein and mRNA was increased remarkably after treatment with LPS(P<0.05). HK-2 cells transfected with pEE14-hSP-D showed up-regulated expression of SP-D. The overexpression of SP-D inhibited the LPS-inducedexpression of MCP-1(P<0.01). Conclusions SP-D inhibits LPS-induced expression of MCP-1 in HK-2 cells. SP-D may play an important role in the modulation of renal inflammation.
