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American Journal of Clinical Nutrition, Vol 30, 1359-1363, Copyright © 1977 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Effects of pneumococcal infection on rat liver microsomal enzymes and lipogenesis by isolated hepatocytes

PG Canonico, E Ayala, WL Rill and JS Little

Modification in the enzymatic complement and lipogenic functions of rat liver endoplasmic reticulum (ER) were shown to occur during pneumococcal sepsis. Glucose-6-phosphatase, 5'nucleotidase, esterase, and NADPH cytochrome C reductase decreased in activity by as much as 50% with respect to controls. Hydroxymethylglutaryl-CoA and NADH cytochrome C reductases were increased 6-and 2-fold, respectively. Alkaline phosphatase and inosine-5'-diphosphatase did not differ with respect to fasted controls. The lipogenic capacity of the ER was shown to be enhanced. In vitro [14C]acetate incorporation into cholesterol and other lipids by hepatocytes isolated from infected rats was increased 2-to 10-fold. It is concluded that the flow of acetyl-CoA in liver cell of Streptococcus pneumoniae-infected rats is toward lipogenesis rather than ketogenesis.


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