PMID: 40213Sep 1, 1979

Restoration of enzyme induction, reduced as a result of long-term cortisol administration, in rat liver

Problemy e̊ndokrinologii
S V ArgutinskaiaR I Salganik

Abstract

Restoration of tyrosinamine transferase (TAT) with cortisol in the rat hepatocytes after the cessation of prolonged (for many days) administration of this hormone was investigated. The effect of the liver regeneration and insulin administration on this process was also studied. In single cortisol administration the TAT activity rose 5-fold; the induction response decreased after 21 days of daily administration. The TAT induction in response to cortisol administration was restored completely only on the 25th--30th day after the cessation of this hormone injection. A three-day insulin administration led to the restoration of TAT induction in response to cortisol administration. The process of the liver regeneration during the first 24 hours after partial hepatectomy induced TAT in the cells of both control animals and those given cortisol for prolonged periods; besides, it aided restoration of the induction response to cortisol administration.

Related Concepts

Glucosephosphatase
Depression, Chemical
Fructose-1,6-Bisphosphatase
Tyrosine Aminotransferase
Tubulin N-acetyltransferase Activity
Enzyme Induction
Transferase
Hydrocortisone
Tyrosine
Hepatocyte

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