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Effect of long-term orlistat treatment on serum levels of advanced glycation end-products in women with polycystic ovary syndrome
Authors
E. Diamanti-Kandarakis Katsikis, I. Piperi, C. Alexandraki, K. Panidis, D.
Publication date
1 January 2007
Publisher
Abstract
Background: Women with polycystic ovary syndrome (PCOS) exhibit elevated serum advanced glycation end-products (AGE) compared with healthy subjects. Short-term administration of orlistat has been shown to reduce the postmeal increase in serum AGE levels in women with PCOS and in controls. Objective: To evaluate the long-term effect of orlistat and a low-calorie diet on serum AGE levels, and on the hormonal and metabolic profile of obese PCOS and normal women. Design: A clinical trial of 6 months of orlistat administration with an energy-restricted diet [basic metabolic rate (BMR) 600 kcal/day] in all subjects. Subjects: Twenty-nine women with PCOS [aged 27.52 ± 5.77 years; body mass index (BMI) 35.43 ± 5.31 kg/m2] and 18 controls (aged 32.06 ± 5.64 years; BMI 36.39 ± 6.47 kg/m2). Measurements: Serum AGE levels (U/ml), hormonal and metabolic profile. Results: PCOS and controls did not differ in BMI (P = 0.58), waist-to-hip ratio (WHR) (P = 0.44), fasting insulin concentration (P = 0.45) and glucose-to-insulin ratio (GIR) (P = 0.34). PCOS women exhibited statistically higher AGE (P < 0.001) and testosterone levels (P < 0.001) compared with controls. After 6 months of orlistat treatment, AGE levels showed a statistically significant decrease in both groups (PCOS: baseline 9.08 ± 1.84, post-orlistat 8.56 ± 1.95, P = 0.001; controls: baseline 5.02 ± 0.62, post-orlistat 4.91 ± 0.69, P = 0.03), independently of the BMI reduction in the PCOS group. A significant reduction was observed in BMI (PCOS: P < 0.001; controls: P < 0.001), WHR (PCOS: P = 0.002; controls: P = 0.04), fasting insulin (PCOS: P < 0.001; controls: P = 0.008), and testosterone concentrations in PCOS (P < 0.001). SHBG concentration (PCOS: P = 0.004; controls: P = 0.008) and GIR (PCOS: P < 0.001; controls: P = 0.03) were significantly increased. A significant improvement was also observed in insulin resistance indices post-treatment in both groups. Conclusions: Our data suggest that orlistat has a beneficial effect in reducing elevated AGE levels and improving the hormonal and metabolic profile in women with PCOS after 6 months of treatment, independently of BMI changes. © 2006 The Authors
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Last time updated on 10/02/2023