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  • Title: Daily urinary interleukin-11 excretion correlated with proteinuria in IgA nephropathy and lupus nephritis.
    Author: Chien JW, Chen WL, Tsui YG, Lee MC, Lin AY, Lin CY.
    Journal: Pediatr Nephrol; 2006 Apr; 21(4):490-6. PubMed ID: 16528544.
    Abstract:
    Interleukin-11 (IL-11) is a multifunctional cytokine with both thrombopoietic and anti-inflammatory effects. In an animal study IL-11 was shown to reduce proteinuria in mice with necrotizing glomerulonephritis. The purpose of this current study is to explore the role of IL-11 in human glomerulonephritis. Subjects of this study were patients with proteinuria (daily urine protein excretion >40 mg/m2 per hour) and underlying pathology of IgA nephropathy (IgAN) (n=20), lupus nephritis (LN) (n=40), and idiopathic nephrotic syndrome (INS) (n=68). Daily urinary IL-11 level was measured by enzyme-linked immunosorbent assay (ELISA). Correlation between urinary IL-11 and urinary protein was determined by Pearson's correlation coefficient. Another five patients with serial data of urinary protein, IL-11 and IL-11 messenger RNA (mRNA) expression in urine sediment are presented. The correlation between urinary IL-11 and daily urinary protein was significant for patients with IgAN (r=0.596, P=0.006) and LN (r=0.630, P<0.001), but not for patients with INS (r=0.030, P=0.812). Serial data revealed the same correlation. Furthermore, the peak of urinary IL-11 mRNA preceded that of urinary IL-11. We conclude that daily urinary IL-11 excretion is correlated with urinary protein loss in nephritis having local T helper (Th)1 predominant immune response, such as IgAN and LN. Local IL-11 production may serve as a counter cytokine against Th1-mediated inflammation.
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