title: Clinical values of urinary IL-6 in asymptomatic renal hematuria and renal hematuria with proteins.
abstract: Renal hematuria is caused by glomerular disease. Under pathological conditions, the distribution of interleukin-6 (IL-6) in kidney tissue is abnormal and urinary IL-6 levels are increased. Abnormal IL-6 secretion promotes the hyperplasia of mesangial cells and matrix and, thus, affects the permeability of the glomerular filtration membrane. Therefore, the detection of urinary IL-6 levels in patients with renal hematuria is beneficial for disease evaluation. A total of 82 patients with primary renal hematuria were divided into group 1 (UPr/24 h < 150 mg; pure hematuria group), group 2 (150 mg ≤ UPr/24 h ≤ 1,000 mg) and group 3 (UPr/24 h > 1,000 mg). A total of 30 normal individuals were selected as the controls. The urinary IL-6 levels were detected by the enzyme-linked immunosorbent assay (ELISA) method and a renal biopsy was conducted. The urinary IL-6 levels and renal pathological damage scores in groups 1 and 2 were significantly reduced compared with those in group 3, (P<0.001 and 0.01, respectively), with no significant difference between groups 1 and 2 (P>0.05). The correlation coefficient (r) of urinary IL-6 with 24 h urinary protein (UPr/24 h) in groups 1, 2 and 3 was 0.017, 0.045 and 0.747, respectively, and that of urinary IL-6 with renal pathological damage score was 0.627, 0.199 and 0.119, respectively. The UPr/24 h was significantly correlated with IL-6 level (r=0.7320, P<0.000). In group 1, the urinary IL-6 levels were correlated with the degree of renal pathological damage. A positive correlation was observed between urinary IL-6 levels and UPr/24 h.
authors.affiliation: Integrated Chinese and Western Medicine Treatment of Renal Disease Centre, Beidaihe Sanatorium of Beijing Military Area Command, Qinhuangdao, Hebei 066100, P.R. China.
authors.forename: Minghui
authors.initials: M
authors.lastname: Song
authors.forename: Lu
authors.initials: L
authors.lastname: Ma
authors.forename: Dan
authors.initials: D
authors.lastname: Yang
authors.forename: Zhijun
authors.initials: Z
authors.lastname: He
authors.forename: Chaobo
authors.initials: C
authors.lastname: Li
authors.forename: Tao
authors.initials: T
authors.lastname: Pan
authors.forename: Anjun
authors.initials: A
authors.lastname: Li
keywords: 24 h urinary protein; interleukin-6; renal hematuria