• Clin. Exp. Nephrol. · Jun 2015

    Serum galectin-3 levels were associated with proteinuria in patients with Familial Mediterranean Fever.

    • Hakki Yilmaz, Osman Inan, Tahir Darcin, Mukadder Ayse Bilgic, and Ali Akcay.
    • Department of Internal Medicine, Section of Nephrology, School of Medicine, Turgut Ozal University, Alparslan Türkes Cad. No: 57, Emek, 06510, Ankara, Turkey. drhakkiyilmaz@yahoo.com.
    • Clin. Exp. Nephrol. 2015 Jun 1; 19 (3): 436-42.

    BackgroundThe most common and pernicious complication of Familial Mediterranean fever (FMF) is renal amyloidosis, usually affecting the kidneys, leading to end-stage renal failure. FMF-related renal amyloidosis needed to be diagnosed early. Optimal colchicine dose is effective in preventing and reversing renal amyloidosis. Galectin-3, profibrotic mediator, has regulatory functions in inflammation, fibrosis and tumorigenesis. Galectin-3 is a strong prognostic marker for heart failure. Galectin-3 plays role in diabetic nephropathy and chronic kidney disease. The aim of the study is to investigate whether galectin-3 is related to proteinuria and amyloidosis in FMF.MethodsSeventy-five FMF patients who have no exclusion criteria and healthy controls (n = 36) were included. Serum galectin-3 was measured and morning spot urine was collected for determination of the protein/creatinine ratio (PCR).ResultsSerum Galectin-3 levels were significantly higher in FMF patients than the control group [969.66 (3825) pg/mL vs. 238 (921) pg/mL, respectively; P<0.001]. We classified into two groups: Group1 (n = 48) had FMF patients with proteniuria, Group2 (n = 27) had FMF patients without proteinuria. Group1 had higher levels of galectin-3 than Group2 [1106(3812) pg/mL vs. 867.3(1433) pg/mL, P < 0.001]. Galectin-3 levels were correlated with PCR in whole group and FMF group (r = 0.785, P < 0.001 and r = 0.803, P < 0.001). In ROC curve, best cutoff value = 581.50 pg/mL was used to detect proteinuria (sensitivity = 91.7 %, specificity = 71.4 %, AUC = 0.879) and optimal cutoff value = 1458.00 pg/mL was an indicator of nephrotic-range proteinuric (sensitivity = 100 %, specificity = 92.1 %, AUC = 0.983).ConclusionGalectin-3 is associated with proteinuria and renal amyloidosis in FMF. Galectin-3 may play role in pathogenesis of amyloidosis.

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