alexa Beneficial effects of melatonin on obesity and lipid profile in young Zucker diabetic fatty rats.
Biochemistry

Biochemistry

Biochemistry & Physiology: Open Access

Author(s): Agil A, NavarroAlarcn M, Ruiz R, Abuhamadah S, ElMir MY,

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Abstract The study objective was to investigate the effects of melatonin on obesity and obesity-associated systolic hypertension and dyslipidemia in young male Zucker diabetic fatty (ZDF) rats, an experimental model of the metabolic syndrome. ZDF rats (n=30) and lean littermates (ZL) (n=30) were used. At 6wk of age, both lean and fatty animals were subdivided into three groups (n=10): naive (N), vehicle-treated (V), and melatonin-treated (M) (10mg/kg/day) for 6wk. Vehicle and melatonin were added to the drinking water. Melatonin reduced mean weight gain (51±2/100g BW) versus N-ZDF group (58±3, P<0.05) without food intake differences. M-ZDF rats showed an apparent reduction in systolic hypertension that proved not to be statistically significant, and a significant improvement in dyslipidemia, with a reduction in hypertriglyceridemia from 580±40 to 420.6±40.9mg/dL (P<0.01). Melatonin raised high-density-lipoprotein (HDL) cholesterol in ZDF (from 81.6±4.9 to 103.1±4.5mg/dL, P<0.01) and ZL rats (from 62.8±4.8 to 73.5±4.8mg/dL, P<0.05) and significantly reduced low-density-lipoprotein (LDL) cholesterol in ZDF rats from 5.20±0.4 to 4.14±0.3 mg/dL (P<0.05) but had no effect on total cholesterol levels. To our knowledge, this is the first evidence of a positive effect of melatonin on overweight and lipid pattern of obese Zucker diabetic rats, supporting the proposition that melatonin administration may ameliorate overweight and lipid metabolism in humans. Because these benefits occurred in youth, before advanced metabolic and vascular complications, melatonin might help to prevent cardiovascular disease associated with obesity and dyslipidemia. © 2010 The Authors. Journal of Pineal Research © 2010 John Wiley & Sons A/S. This article was published in J Pineal Res and referenced in Biochemistry & Physiology: Open Access

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