[Effect of changing fat and protein levels on various fundamental characteristics of lipid and protein metabolism in the blood serum and on the body composition of growing rats].
A total of 263 young rats received 6 different diets containing varying levels of lipids and proteins. After a feeding period of not less than 3 weeks the animals were killed in a fasted state or after feeding and the blood serum was investigated for total lipids, free fatty acids, cholesterol, urea, creatinine and insulin. The bodies of the animals were analyzed for crude fat und crude protein. The body proteins seemed to be hardly influenced whereas considerable variations were noticed in the values for body fat, although these were not found to be clearly related to the intake of dietary fat. Values for the content of total lipids, free fatty acids and cholesterol in blood serum were shown to be clearly dependent on the amount of fat ingested. In addition, it was observed that these processes were partly influenced by dietary proteins. The values for urea, creatinine and insulin were only slightly affected by dietary fat, but were markedly changed by dietary proteins. Differences in total lipids and cholesterol as discussed above were blurred or disappeared altogether when the animals were analyzed after food intake; on the other hand, it was shown, that dietary proteins had a statistically well-established effect on the values for urea and a marked influence on insulin values.
D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001823:Body Composition; D002784:Cholesterol / Q000097:blood; D004041:Dietary Fats / Q000378:metabolism*; D004044:Dietary Proteins / Q000378:metabolism*; D005230:Fatty Acids, Nonesterified / Q000097:blood; D006128:Growth; D008055:Lipids / Q000097:blood; D008297:Male; D051381:Rats
D004041:Dietary Fats; D004044:Dietary Proteins; D005230:Fatty Acids, Nonesterified; D008055:Lipids; D002784:Cholesterol
Die Auswirkung unterschiedlicher Fett- und Proteingaben auf einige Leitparameter des Lipid- und Proteinstoffwechsels im Blutserum und auf die Körperzusammensetzung von wachsenden Ratten