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Relationships Between Mobilization of Free Fatty Acids from Adipose Tissue, and the Concentrations of Calcium in the Extracellular Fluid and in the Tissue
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1969
Year
Mammalian PhysiologyFree Fatty AcidsRabbit Adipose TissueExtracellular FluidObesityBody CompositionMetabolic StateAdipose Tissue MetabolismHealth SciencesAnimal PhysiologyIncubation MediumSodium HomeostasisEndocrine MechanismOmega-3 Fatty AcidAdipose TissueTissue PhysiologyEndocrinologyPharmacologyPotassium HomeostasisPhysiologyMetabolismMedicineLipid Synthesis
Injection of 50 U adrenocorticotropin (ACTH) in rabbits produces 3 hr later a 260–680 % increase in serum FFA concentration, a 27% reduction in the concentration of calcium in serum, and a 500–1100% increase in the concentration of calcium in adipose tissue. Incubation of adipose tissue slices from rabbit, hamster or rat in the homologous serum containing 10 μg/mlACTH or epinephrine causes, in association with the hormone-stimulated lipolysis, a 40–49 % decrease in medium calcium and a 150–460% increase in tissue calcium. When the incubation medium is Krebs-Ringer buffer +bovine serum albumin instead of serum, a similar degree of lipolysis is stimulated in rabbit adipose tissue by ACTH, but no detectable redistribution of calcium from medium to tissue occurs. (Endocrinology84: 926, 1969)