RESUMEN
In vivo administration of testosterone significantly stimulated the activities of cytochrome oxidase, alpha-glycerophosphate dehydrogenase (alpha-GPDH), succinate dehydrogenase (SDH) and adenosine triphosphatase (Mg2+ ATPase), in mitochondria isolated from the liver of G. carnosus. Administration of dehydroepiandrosterone and androstenedione while significantly stimulated the activities of cytochrome oxidase and alpha-GPDH, did not change that of SDH and Mg2+ ATPase. Simultaneous injections of testosterone and actinomycin D or chloramphenicol prevented the testosterone-stimulated activities of all the oxidative enzymes studied. The results clearly document the important stimulatory role of androgens in the regulation of hepatic mitochondrial metabolism in G. carnosus.