PMID: 3214141Jan 1, 1988Paper

Hypocholesterolaemic effects of dietary propionate: studies in whole animals and perfused rat liver

Annals of Nutrition & Metabolism
R J IllmanB Q Cheng

Abstract

In adult male rats fed a non-purified diet supplemented with 5% sodium propionate, plasma cholesterol concentrations were significantly depressed. Although liver cholesterol was increased by feeding propionate, rates of hepatic cholesterol and fatty acid synthesis were unchanged. Tissue concentrations and rates of synthesis of cholesterol were also unaffected by dietary propionate in stomach, small intestine and caecum. Concentrations of propionate in hepatic portal venous plasma were raised by feeding the supplemented diet but the increase was low in comparison to the dietary intake. Examination of the gut contents revealed concentrations of total volatile fatty acids (VFA) of 19 mumol/ml in the stomach contents of control rats and 148 mumol/ml (of which propionate contributed 116 mumol/ml) in those fed the supplemented diet. Duodenal and ileal concentrations of VFA were very low and were only slightly raised in the propionate-fed rats while caecal VFA were the same in both groups with a combined mean of 159 mumol/ml. These data indicate that in the rat, the absorption of dietary propionate appears to occur in the stomach. In pigs fed a standard ration hepatic portal venous VFA remained low for the first 4 h after feeding but ...Continue Reading

Citations

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