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Background: Early detection of diabetic nephropathy (DN) is important. Matrix metalloproteinases-2 (MMP-2) regulates a variety of cellular functions including apoptosis and angiogenesis. Diabetic environment stimulates the secretion of MMP-2 that is considered to participate in DN. Objectives: We conducted this study to investigate the level of MMP-2 as a potential marker of early nephropathy in type 1 diabetes. Methods: The total number of the study was 300 participants, among them 100 participants, were healthy volunteers control group with comparable age and sex to other participants (Group 1). The remaining 200 participants were suffering from type 1 diabetes and were categorized according to duration of diabetes into 100 patients had disease duration less than 5 years and all of them non microalbuimnuric (Group 2) and the last 100 patients had disease duration more than 5 years (Group 3). All subjects were submitted to complete clinical examination; routine laboratory investigations, including; random blood sugar (RBS); glycosylated hemoglobin (HbA1C) and quantitative determination of microalbuminuria (MA) for DN. Specific laboratory investigation for MMP-2 by enzyme-linked immunosorbent assay. Results: RBS and HbA-1c were significantly higher in group 3 than group 2. MA significantly detected only in group 3. MMP-2 was significantly higher in group 3 than the other groups 1, 2 and in the meantime significantly higher in group 2 than 1. MMP-2 starts to rise early before the onset of MA in group 2. Eventually duration of diabetes, RBS, HbA1c and MA were positively correlated with the MMP-2 level. (r=0. 44; P<0.05), (r=0. 43; P<0.05), (r=0. 58; P<0.05) and (r=0. 71; P<0.001) respectively. MMP-2 cutoff level of ≥ 311 ng/ml had a greater sensitivity and specificity for identifying MA (P<0.001). Conclusion: MMP-2 level pre-date the clinical evidence of MA, may serve as an important predictor for early development of DN and a potential marker of severity.

Matrix Metalloproteinase-2 as Potential Marker of Early Nephropathy in Type 1 Diabetes