Corticosteroid receptor analyses in rat and hamster brains reveal species specificity in the type I and type II receptors

W Sutanto, J M Reul, J A van Eekelen, E R de Kloet

Research output: Contribution to journalArticle (Academic Journal)peer-review

11 Citations (Scopus)

Abstract

In vitro cytosol binding, receptor autoradiography with radiolabelled corticosteroid analogs, and immunocytochemistry with monoclonal antibodies have revealed the presence of two receptor systems for corticosteroids in rat and hamster brains. The type I receptor is found mainly in the hippocampal region, and in the hamster it binds cortisol (F) and corticosterone (B) with similar affinity while in the rat (a species which unlike the hamster secretes solely B) the type I receptor shows high affinity to B and not to F. The type II receptor is more widely distributed in the brain and it binds to F (hamster) or B (rat) with affinity 4-6-fold lower than to the type I. in vivo, the hamster type I and II retain F much more than B while those in the rat show the opposite. In conclusion, the present study clearly indicates species-specificity in type I and type II receptor systems in these animals. Furthermore, the type I receptor displays in vivo stringent preference for retention of the animal's predominantly circulating corticosteroid (F in hamster, in B in rat).

Original languageEnglish
Pages (from-to)417-20
Number of pages4
JournalJournal of Steroid Biochemistry
Volume30
Issue number1-6
Publication statusPublished - 1988

Keywords

  • Adrenalectomy
  • Animals
  • Brain
  • Corticosterone
  • Cricetinae
  • Cricetulus
  • Cytosol
  • Hydrocortisone
  • Kinetics
  • Male
  • Rats
  • Rats, Inbred Strains
  • Receptors, Glucocorticoid
  • Species Specificity
  • Transcortin

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