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    Diabetes Care. 2005 Jul;28(7):1718-23.

    Prospective study of lipoprotein(a) as a risk factor for deteriorating renal function in type 2 diabetic patients with overt proteinuria.

    Song KH, Ko SH, Kim HW, Ahn YB, Lee JM, Son HS, Yoon KH, Cha BY, Lee KW, Son HY.

    Department of Internal Medicine, Catholic University of Korea, Seoul, Korea. kihos@catholic.ac.kr

    OBJECTIVE: The effect of lipoprotein(a) [Lp(a)] on the progression of diabetic nephropathy has not been evaluated yet. The aim of this study was to determine whether Lp(a) is an independent risk factor for deteriorating renal function in type 2 diabetic patients with nephropathy. RESEARCH DESIGN AND METHODS: We conducted this prospective study in type 2 diabetic patients with overt proteinuria. Patients were divided into two groups according to their baseline serum Lp(a) level. Group 1 had Lp(a) levels < or =30 mg/dl (n = 40) and group 2 had Lp(a) levels >30 mg/dl (n = 41). Patients were followed for 2 years. Progression of diabetic nephropathy was defined as a greater than twofold increase of follow-up serum creatinine concentration from the baseline value. RESULTS: At baseline and during the follow-up, there was no difference in HbA(1c) and lipid profile between groups 1 and 2. However, serum creatinine was significantly higher in group 2 than in group 1 after 1 year (148.3 +/- 78.0 vs. 108.1 +/- 34.9 micromol/l, P = 0.004) and after 2 years (216.9 +/- 144.5 vs. 131.3 +/- 47.3 micromol/l, P = 0.001), although baseline serum creatinine did not differ significantly between groups. In all, 13 of 14 patients with progression of diabetic nephropathy (progressors) were from group 2. Baseline Lp(a) levels were higher in the progressors than in the nonprogressors (62.9 +/- 26.7 vs. 33.5 +/- 27.5 mg/dl, P < 0.001). Multiple logistic regression showed that baseline Lp(a) level was a significant and independent predictor of the progression of diabetic nephropathy. CONCLUSIONS: Our study demonstrated that Lp(a) is an independent risk factor for the progression of diabetic nephropathy in type 2 diabetic patients with overt proteinuria.

    PMID: 15983325 [PubMed - indexed for MEDLINE]

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