Insulin resistance and endothelial dysfunction in type 2 diabetes patients with or without microalbuminuria
Abstract
To evaluate the relationship between insulin resistance and endothelial function in type 2 diabetes patients with or without microalbuminuria and to explore the pathophysiological mechanisms of the increased macrovascular risk in type 2 diabetes mellitus. Twelve type 2 diabetes patients with microalbuminuria (urinary albumin 30-300 g/mg creatinine, DM-MA) and 12 type 2 diabetes patients without microalbuminuria (urinary albumin <30 g/mg creatinine, DM-NA) were recruited, matched for their sex, age, body mass index (BMI), diabetes duration, antidiabetic therapy. Their hemoglobin (HbA1C) was less than 7.5% and the blood pressure was lower than 140/90 mmHg. None had evidence of macrovascular disease and serum cholesterol levels were normal. Twelve healthy volunteers (C) were enrolled as controls. All subjects received a hyperinsulinemic euglycemic clamp study (insulin infusion rate, 120 mU/m2/min) to assess the peripheral glucose disposal rate (GDR) in the steady state and had a high-resolution ultrasonography to measure vasodilation in the brachial artery diameter in response to reactive hyperemia (endothelium-dependent) and administration of glyceryl trinitrate (endothelium-independent). Plasma free fatty acids (FFAs), plasminog...Continue Reading
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