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  • Title: alpha-Adrenergic stimulation of glycolysis and Na+, K+-transport in perfused rat liver.
    Author: Becker J, Jakob A.
    Journal: Eur J Biochem; 1982 Nov 15; 128(2-3):293-6. PubMed ID: 6295755.
    Abstract:
    Interactions between alpha-adrenergic-induced lactate production, respiration and K+ uptake of perfused rat livers were investigated. Inhibition of mitochondrial electron transport by cyanide had no effect on K+ uptake, decreased phenylephrine-induced lactate production by 60% and suppressed extra O2 consumption by more than 90%. Ouabain did not affect alpha-adrenergic-induced respiration but inhibited K+ uptake and extra lactate production. Effects of ouabain and K+-free medium on lactate production were additive and independent of cyanide, indicating that they were mediated by extramitochondrial mechanisms. Extra ATP utilized for K+ uptake in response to phenylephrine was apparently of glycolytic rather than mitochondrial origin. We propose that alpha-adrenergic-induced lactate production is secondary to an enhanced operation of the plasma membrane (Na+,K+)-ATPase.
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