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Open Access Research article

Increased plasma sVCAM-1 is associated with severity in IgA nephropathy

Li Zhu, Sufang Shi, Lijun Liu, Jicheng Lv and Hong Zhang*

Author affiliations

Renal Division, Department of Medicine, Peking University First Hospital; Peking University Institute of Nephrology; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of Chronic Kidney Disease Prevention and Treatment (Peking University), Ministry of Education, Beijing, 100034, China

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Citation and License

BMC Nephrology 2013, 14:21  doi:10.1186/1471-2369-14-21

Published: 22 January 2013

Abstract

Background

A considerable proportion of IgAN patients present with histological vasculitic/crescentic lesions in glomeruli, indicating activation of vascular inflammation. Using sVCAM-1, a well-proven marker for endothelial injury under inflammatory processes, we investigated vascular injury and its association with clinical and pathological manifestations in IgAN patients.

Methods

In this study, 327 biopsy-proven IgAN patients and 55 healthy controls were enrolled. The Oxford classification and two variables, Active Crescentic Lesion Percentage (ACLP) and Chronic Glomerular Lesion Percentage (CGLP), were used for evaluating pathological lesions. Human Umbilical Vein Endothelial Cells were treated with 25-400 ug/ml IgA1. sVCAM-1 in plasma and culture supernatant were measured by ELISA.

Results

Plasma sVCAM-1 in IgAN patients was significantly higher than healthy controls. In patients with IgAN, plasma sVCAM-1 was significantly correlated with eGFR, 24h urine protein excretion, tubular atrophy/interstitial fibrosis lesion and ACLP, but not CGLP. Meanwhile, compared to healthy volunteers, IgA1 from IgAN patients showed a tendency to increase the HUVECs supernatant sVCAM-1 expression. And IgA1 induced the sVCAM-1 increasing from HUVECs in time- and dose-dependent manner.

Conclusions

We found increased plasma sVCAM-1 in IgAN patients and its association with severe clinical and pathological manifestations, which might be partly resulted from effect of IgA1 to endothelial cells.

Keywords:
sVCAM-1; IgA nephropathy; Vascular injury