Abstract
OBJECTIVE: Increased thickness of the intima–media complex of the common carotid artery (IMT-CCA) is an early marker of atherosclerosis. The aim of the present study was to investigate the relationship between insulin resistance and IMT-CCA in premenopausal women.
SUBJECTS: 86 young women, aged 18–31 y, were recruited for the study: 28 were normal weight (BMI<25 kg/m2), 23 were overweight (BMI 25–30 kg/m2) and 35 were obese (BMI>30 kg/m2).
MEASUREMENTS: The IMT-CCA was measured by high resolution ‘B-mode’ ultrasonography; insulin sensitivity was determined by insulin tolerance test (ITT) and quantitated by calculation of KITT. Fasting plasma glucose and lipids (triglycerides, total and HDL-cholesterol) were also measured by enzymatic methods. Central fat accumulation was evaluated by measuring waist circumference (WC).
RESULTS: IMT-CCA showed an inverse association with KITT (P<0.05). When the IMT-CCA was considered as the dependent variable in a forward stepwise multiple regression analysis, it maintained an independent association with KITT (P<0.05), after adjusting data for age, BMI, WC, mean blood pressure levels and plasma glucose and lipids.
CONCLUSION: These results suggest that IMT-CCA is significantly associated with insulin resistance, independent of other well-known CVD risk factors. Since the IMT-CCA is an earlier asymptomatic sign of atherosclerosis, this study indicates that insulin resistance per se may accelerate atherogenesis.
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De Pergola, G., Ciccone, M., Pannacciulli, N. et al. Lower insulin sensitivity as an independent risk factor for carotid wall thickening in normotensive, non-diabetic, non-smoking normal weight and obese premenopausal women. Int J Obes 24, 825–829 (2000). https://doi.org/10.1038/sj.ijo.0801239
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DOI: https://doi.org/10.1038/sj.ijo.0801239
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