Journal
BRITISH JOURNAL OF NUTRITION
Volume 106, Issue 5, Pages 762-768Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0007114511000778
Keywords
Phaseolus vulgar's dry extract (Beanblock (R)); Food intake; Body weight; Glycaenaia; Obese Zucker fa/fa rats
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Funding
- Italian National Research Council (Consiglio Nazionale delle Ricerche)
- Indena Spa (Milan, Italy)
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Previous lines of experimental evidence have suggested that Phaseolus vulgaris extracts reduce food intake, body weight, lipid accumulation, hedonic properties of food, carbohydrate absorption and metabolism, and glycaemia in rats. The present study was designed to assess the effect of multiple cycles of repeated treatments with a standardised P. vulgaris dry extract on daily food intake and body weight in genetically obese Zucker fa/fa rats (Expt 1). Additionally, the study tested the effect of acute treatment with P. vulgaris dry extract on postprandial glycaemia in Zucker fa/fa rats (Expt 2). In Expt 1, P. vulgaris dry extract was administered daily, at closes of 50 and 500 mg/kg, in three 5 cl treatment periods followed by three 20 d off-treatment periods. Administration of P. vulgaris dry extract resulted in dose-dependent decreases in daily food intake and body weight in each treatment phase. Reductions in food intake were of comparable magnitude in each treatment phase. In EXpt 2, food-deprived rats were acutely treated with 50 and 500 mg P. vulgaris dry extract per kg immediately before access to a fixed amount of a starch-enriched chow. Treatment with P. vulgaris dry extract resulted in a dosedependent suppression of glycaemia. These results extend previous data on the anorectic and hypoglycaemic effects of the P vulgaris dry extract to a validated animal model of obesity. Together with data published previously in the literature, these results strengthen the hypothesis that potentially effective, novel pharmacotherapies for obesity and related disorders may originate from extracts and derivatives of P. vulgaris.
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