Skip to main navigation Skip to search Skip to main content

The initial phase of GnRH-stimulated LH release from pituitary cells is independent of calcium entry through voltage-gated channels

  • Colleen E. Smith*
  • , I. Wakefield
  • , Judy A. King
  • , Z. Naor
  • , R. P. Millar
  • , J. S. Davidson
  • *Corresponding author for this work
  • South African Medical Research Council
  • Weizmann Institute of Science

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

Kinetic studies on gonadotropin-releasing hormone (GnRH)-stimulated luteinizing hormone (LH) release were undertaken using rat and chicken pituitary cell cultures. In response to continuous GnRH stimulation, a biphasic pattern of LH release was demonstrated. The two phases showed different susceptibility to the voltage-gated Ca2+ channel blockers D600 and nifedipine. The first (transient) phase of LH release was unaffected by the Ca2+ channel blockers whereas the second (sustained) phase was inhibited by both drugs. These results indicate that the initial phase of LH release is independent of Ca2+ entry through voltage-gated Ca2+ channels and may depend on mobilisation of intracellular Ca2+ or entry of extracellular Ca2+ through another mechanism.

Original languageEnglish
Pages (from-to)247-250
Number of pages4
JournalFEBS Letters
Volume225
Issue number1-2
DOIs
StatePublished - 10 Dec 1987
Externally publishedYes

Funding

Funders
South African Medical ResearchC ouncil

    Keywords

    • (Pituitary cell)
    • Ca channel
    • Ca influx
    • Gonadotropin-releasing hormone
    • Hormone release
    • Kinetics
    • Luteinizing hormone

    Fingerprint

    Dive into the research topics of 'The initial phase of GnRH-stimulated LH release from pituitary cells is independent of calcium entry through voltage-gated channels'. Together they form a unique fingerprint.

    Cite this