R A Freedland

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1. Gluconeogenesis from 10mm-lactate in the perfused liver of starved rats is inhibited by ethanol. The degree of inhibition reached a maximum of 66% at 10mm-ethanol under the test conditions and decreased at higher ethanol concentrations. The concentration-dependence of the inhibition is paralleled by the concentration-dependence of the activity of alcohol(More)
FEATHERSTON, W. R.,Q. R. ROGERS, AND R. A. FREEDLAND. Relative importance of kidney and liver in synthesis of arginine by the rat. Am. J. Physiol. 224(l) : Yl27-129. 1973.-The relative contributions of the kidneys and liver to the total synthesis of arginine in the rat were studied by following the conversion of intravenously injected(More)
The contribution under various nutritional regimens of several amino acids and lactate to gluconeogenesis was estimated by measuring the glucose formation from 14C-labeled substrates. Isolated rat hepatocytes were incubated for 60 min in a Krebs-Ringer bicarbonate buffer pH 7.4 containing lactate, pyruvate and all the amino acids at concentrations similar(More)
The activities of three urea cycle enzymes, several nitrogen catabolic, gluconeogenic, and lipogenic enzymes were measured in the liver of adult cats fed: a commercial kibble; a 17.5 or 70% protein purified diet, or starved for 5 days. Except for an increase in tyrosine transaminase (EC 2.6.1.5) after feeding the high protein diet, there were no changes in(More)
Reports of changes in carbohydrate metabolism during vitellogenesis in fish prompted an investigation of the effects of estrogen on glucose utilization in rainbow trout. Estrogen pellets were implanted in both female and male fish, and a third group of male fish was given a sham operation. After cannulation of the dorsal aorta, D-[1-3H]glucose and(More)
1. The rates of gluconeogenesis from most substrates tested in the perfused livers of well-fed rats were about half of those obtained in the livers of starved rats. There was no difference for glycerol. 2. A diet low in carbohydrate increased the rates of gluconeogenesis from some substrates but not from all. In general the effects of a low-carbohydrate(More)
The effects of propionate, a product of intestinal fiber fermentation, on fatty acid and sterol synthesis were studied in isolated rat hepatocytes. Fatty acid synthesis, as measured by tritium incorporation from 3H2O, was inhibited in the presence of 1 mmol/L propionate with no substrate additions or additions of acetate, butyrate, lactate or oleate.(More)