Effect of seasonal acclimatization on estrogen-induced vitellogenesis and on the hepatic estrogen receptors in the male carp

I. Hernandez, A. Poblete, R. Amthauer, R. Pessot, M. Krauskopf

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

The levels of circulating vitellogenin in the plasma of male carp after induction by estradiol-17β was examined in summer- and winter-acclimatized fish. During the warm season male fish exhibited a clear vitellogenic response, whereas the fish adapted to the cold season did not. The evaluation of the hepatic estrogen receptors revealed that although steroid-binding affinity is not affected by seasonal acclimatization, the concentration of estrogen receptors certainly is. This was evidenced in estrogen treated fish. Summer-acclimatized carp featured a concentration of hepatic estrogen receptors 2.5 fold higher than the cold season adapted fish. The results suggest that the failure of estrogen to induce vitellogenesis in cold adapted carp may be due, at least in part, to a deficient up-regulation of hepatic estrogen receptors in the corresponding acclimatized state.

Original languageEnglish
Pages (from-to)559-567
Number of pages9
JournalBiochemistry International
Volume28
Issue number3
Publication statusPublished - 1992

ASJC Scopus subject areas

  • Biochemistry

Fingerprint

Dive into the research topics of 'Effect of seasonal acclimatization on estrogen-induced vitellogenesis and on the hepatic estrogen receptors in the male carp'. Together they form a unique fingerprint.

Cite this