Study of the effect of lactobacillus GG supplementation in combination with and without arginine aspartate on lipoproteins and liver peroxidation in cholesterol-fed rats

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Abstract
The effect of diet integration with lactobacillus GG and arginine aspartate administered singly or together to rats submitted to a cholesterol-enriched diet have been evaluated by measuring both the changes in the levels of cholesterol and tryglycerides and the variations of the most indicative parameters of peroxidation in plasma lipoproteins and livers. The administration of lactobacillus GG alone is able to induce a significant hypocholesterolaemic effect while the arginine aspartate singly or together with the lactobacillus does not seem to promote any significant hypocholesterolaemic effect. The cholesterol levels (expressed as mg × dL -1) are in fact: 45.5 for the control diet; 185.4 for the cholesterol-enriched diet; 131.1 for the cholesterol-enriched diet + lactobacillus; 178.2 for the cholesterol enriched diet + arginine aspartate and 122.4 for the cholestorol-enriched diet + lactobacillus + arginine aspartate. On the contrary, the co-administration of lactobacillus and arginine aspartate gives rise to a very high preventive activity against the cholesterol-induced peroxidation damages both in the plasma lipoproteins and in the liver. Such preventive activity is higher by far than that obtainable when lactobacillus or arginine aspartate are administered singly to the rats.
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