Abstract
This study measured urinary excretion and renal levels of hepatocyte growth factor (HGF) in children with Henoch-Schönlein purpura (HSP), examining the relationship between HGF, proteinuria and renal pathological changes. Seventy-eight patients with HSP aged 6 - 18 years were divided into three groups, based on urinary albumin excretion rate. Urinary HGF concentration was measured by enzyme-linked immunosorbent assay. Renal biopsies were performed in 22 patients; renal levels of HGF protein were determined immunohistochemically. Compared with controls, urinary HGF was significantly increased in patients with normoalbuminuria and microalbuminuria, especially in those with microalbuminuria; no differences were observed between patients with macroalbuminuria and controls. Little or no HGF was present in normal kidney, but HGF was present in renal tissue in all HSP patients, particularly those with microalbuminuria. Urinary HGF was strongly correlated with the presence of renal HGF. These results suggest that HGF is associated with proteinuria and renal pathological changes in children with HSP. The detection of urinary HGF in children with HSP may be a non-invasive, effective, method for early diagnosis of renal injury.
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