Expression and clinical significances o f CD62P and CD44 in the peripheral blood of children with lupus nephritis / 中华风湿病学杂志

ABSTRACT

Objective To study the levels of CD62P and CD44 in the peripheral blood of children with lupus nephritis (LN) and their clinical significances were investigated. Methods Twenty-two children with active LN were divided into two groups by their clinical features,nephritic syndrome group (NS group,12 patients) and nonnephritic syndrome group (non NS group, 10 patients). Those patients were also divided into two groups according to their pathologic grading,grade Ⅱ+Ⅲ group (6 patients) and grade Ⅳ+Ⅴ group(16 patients).According to their tubulointerstitial lesions (TIL), those patients were divided into three groups, TIL grade 0 group (5 patients), grade Ⅰ group (13 patients), grade Ⅱ group (4 patients). The blood of the 18 patients who were in inactive state after treatment were retested blood again. The levels of CD62P and CD44 in the peripheral blood were assayed by radioimmunoassay (RIA) and enzyme-linked immunoabsorbant assay (ELISA) in LN children and in 20 normal age and sex-matched controls, and their correlation with clinical peripheral blood levels of CD62P and CD44 in NS group, grade Ⅳ+Ⅴ group were significantly higher than CD44 were positively correlated with 24-hour proteinuria,ESR, urine NAG, urine β2-MG and the TIL grade (P<0.05 and P<0.01, respectively), but negatively correlated with the levels of serum complement 3 (C3) and albumin (ALB) (P<0.05).The levels of CD62P was positively correlated with those of CD44 (P<0.05). Conclusion CD62P and CD44 may be involved in the pathogenesis of LN. The peripheral blood levels of CD62P and CD44 in LN children could be used as one of the indicators for lupus activity, severity, treatment effectiveness and prediction of outcome.