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KMID : 1007520010100020166
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Food Science and Biotechnology
2001 Volume.10 No. 2 p.166 ~ p.171
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Effects of Rice Bran and Wheat Bran on the Levels of Lipids in Plasma, Liver and Feces , and Short - chain Fatty Acids in Large Bowel of Rats
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Choi Young-Sun
Jang Jae-Hee
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Abstract
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Effects of two dietary fiber sources, rice bran and wheat bran, on intestinal physiology were compared. Ten Sprague Dawley male rats were assigned to one of four experimental groups and given experimental diets containing equal level of protein and dietary fiber for 6 weeks. Bran and pectin diets contained 5% total dietary fiber, and all diets contained 0.4% cholesterol. The energy ratio of carbohydrate, protein, and fat was 65:15:25. Food efficiency ratio and body weight gain were not significantly different among the experimental groups. Non-fasted plasma total cholesterol was elevated in rats fed rice bran as compared to those of control and pectin-fed diet rats. Rice bran and pectin had the same effect in increasing the contents of total lipid in feces, but rice bran was more effective in fecal excretion of bile acids than pectin and wheat bran. The pH of cecal content was lower in wheat bran group than in rice bran group. Pectin revealing a hypocholesterolemic effect produced the most propionic acid in cecum as well as in distal colon. Wheat bran produced not only highest concentration but also most amount of butyric acid in cecum among the experimental groups. The concentration of butyric acid in distal colon of rats fed rice bran was not different from that of rats fed wheat bran. The results indicate that sources of fiber were closely related with short-chain fatty acid production and intestinal physiology.
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