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Diabetes Care, Vol 21, Issue 9 1517-1520, Copyright © 1998 by American Diabetes Association

ARTICLES

Plasma lipoprotein(a) levels are not influenced by glycemic control in type 1 diabetes

A Perez, G Carreras, A Caixas, A Castellvi, A Caballero, R Bonet, J Ordonez-Llanos and A de Leiva
Department of Endocrinology, Hospital Sant Pau, Autonomous University of Barcelona, Spain.

OBJECTIVE: To determine the influence of glycemic control improvement with intensive therapy on lipoprotein(a) [Lp(a)] concentrations in type 1 diabetic patients. RESEARCH DESIGN AND METHODS: A total of 105 poorly controlled type 1 diabetic patients (60 men, 45 women) without diabetic complications participated in a longitudinal study performed in a tertiary referral center, to compare lipid, lipoprotein, and Lp(a) levels before and after 3 months of intensive therapy with multiple insulin doses. Lp(a) levels were measured by the Terumo method. Differences between the two periods were assessed by the paired t test and Wilcoxon's test. RESULTS: After 3 months of intensive therapy, all patients exhibited improved glycemic control. HbA1c decreased from 8.9 +/- 2.4 to 6.5 +/- 1.6% (P < 0.0001), being < or =6% in 47% of patients. However, although a more favorable lipoprotein profile was obtained, no changes in Lp(a) concentrations were observed in the whole group of patients (16.7 +/- 17.3 vs. 17.2 +/- 17.7 mg/dl) or in patients with baseline Lp(a) levels above 30 mg/dl (47.1 +/- 14.8 vs. 47.4 +/- 18.9 mg/dl) or below 30 mg/dl (9.6 +/- 7.3 vs. 10.2 +/- 6.7 mg/dl). In addition, patients reaching HbA1c < or =6 or >6% presented similar Lp(a) levels (19.7 +/- 18.0 vs. 15.0 +/- 17.4 mg/dl), and changes in Lp(a) did not correlate with those observed in HbA1c. CONCLUSIONS: These data demonstrate that the improvement of glycemic control does not influence plasma Lp(a) concentrations in type 1 diabetic patients independently of baseline Lp(a) levels and the degree of glycemic control.
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Diabetes Diabetes Care Clinical Diabetes Diabetes Spectrum
Copyright © 1998 by the American Diabetes Association.