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Abstract Title:

Dietary cooked navy beans and their fractions attenuate colon carcinogenesis in azoxymethane-induced ob/ob mice.

Abstract Source:

Nutr Cancer. 2008;60(3):373-81. PMID: 18444172

Abstract Author(s):

Gerd Bobe, Kathleen G Barrett, Roycelynn A Mentor-Marcel, Umberto Saffiotti, Matthew R Young, Nancy H Colburn, Paul S Albert, Maurice R Bennink, Elaine Lanza

Abstract:

Based on the protective effects of cooked dry bean consumption in a human intervention study, we evaluated which fraction of cooked dry beans is responsible for its cancer-preventive effects. Cooked navy beans (whole beans), the insoluble fraction (bean residue) or soluble fraction of the 60% (vol:vol) ethanol extract of cooked navy beans (bean extract), or a modified AIN-93G diet (16.6% fat including 12.9% lard) as control diet were fed to 160 male obese ob/ob mice after 2 azoxymethane injections. In comparison to control-fed mice, dysplasia, adenomas, or adenocarcinomas were detected in fewer mice on either bean fraction diet (percent reduction from control: whole beans 54%, P=0.10; bean residue 81%, P=0.003; bean extract 91%, P=0.007), and any type of colon lesions, including focal hyperplasia, were found in fewer mice on each of the 3 bean diets percent reduction from control: whole bean 56%, P=0.04; bean residue 67%, P=0.01; bean extract 87%, P=0.0003. These results suggest that both the soluble and the insoluble fraction of the extract contribute to the cancer-protective effect of cooked navy beans.

Study Type : Animal Study

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Sayer Ji
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