Inhibition of prolactin and growth hormone secretion by nickel

Life Sci. 1984 Oct 22;35(17):1747-54. doi: 10.1016/0024-3205(84)90271-6.

Abstract

Nickel (Ni++) is a potent inhibitor of prolactin (PRL) secretion from isolated rat pituitary quarters in vitro, suppressing both basal PRL release and the stimulation of PRL secretion due to theophylline and dibutyryl cyclic AMP. Stimulation of growth hormone (GH) secretion by synthetic GHRH is also blunted by Ni++, although basal GH release and stimulated GH release due to theophylline or dibutyryl cyclic AMP are not suppressed. Ni++ antagonizes the stimulation of both PRL and GH secretion by barium (Ba++) ion, suggesting that the inhibitory effects of Ni++ on hormone release are due to an antagonism of calcium uptake or redistribution.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Barium / pharmacology
  • Bucladesine / pharmacology
  • Calcium / pharmacology
  • Growth Hormone / metabolism*
  • Growth Hormone-Releasing Hormone / pharmacology
  • Lanthanum / pharmacology
  • Male
  • Nickel / pharmacology*
  • Pituitary Gland / drug effects*
  • Pituitary Gland / metabolism
  • Prolactin / metabolism*
  • Rats
  • Rats, Inbred Strains
  • Theophylline / pharmacology
  • Time Factors
  • Verapamil / pharmacology

Substances

  • Barium
  • Bucladesine
  • Lanthanum
  • Nickel
  • Prolactin
  • Growth Hormone
  • Growth Hormone-Releasing Hormone
  • Theophylline
  • Verapamil
  • Calcium