Insulin sensitivity (Si), glucose tolerance, and lipid metabolism were investigated in osteopenic postmenopausal women before and after 6 months of treatment with raloxifene (60 mg/d) or placebo. In a group of women (n = 34), glucose metabolism was evaluated by means of an oral glucose tolerance test (75 g). In another group of women (n = 24), Si and peripheral glucose utilization not dependent on insulin were evaluated by means of a frequently sampled iv glucose tolerance test associated with the minimal model method. No metabolic modification was observed in women receiving placebo. Raloxifene did not significantly modify high density lipoprotein-cholesterol and triglycerides, whereas it significantly decreased low density lipoprotein (LDL) cholesterol (4.84 +/- 0.34 mmol/liter vs. 3.83 +/- 0.49 mmol/liter; P = 0.014) and LDL/high density lipoprotein cholesterol ratio (3.21 +/- 0.31 mmol/liter vs. 2.46 +/- 0.44 mmol/liter; P = 0.012). Fasting levels and responses to the oral glucose tolerance test of glucose, insulin, C-peptide, and C-peptide/insulin were not modified by raloxifene. Similarly, raloxifene did not modify Si (4.22 +/- 4.1 vs. 5.13 +/- 1.75), or insulin (0.025 +/- 0.003 vs. 0.019 +/- 0.002). The present data show that in osteopenic postmenopausal women raloxifene reduces LDL levels but does not modify insulin sensitivity and glucose metabolism.

Raloxifene does not modify insulin sensitivity and glucose metabolism in postmenopausal women / Cagnacci, Angelo; A. M., Paoletti; A., Zanni; S., Arangino; G., Ibba; M., Orrù; G. B., Melis; Volpe, Annibale. - In: THE JOURNAL OF CLINICAL ENDOCRINOLOGY AND METABOLISM. - ISSN 0021-972X. - STAMPA. - 87(2002), pp. 4117-4121.

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