Stimulation of pituitary luteinizing hormone secretion by gonadotropin-releasing hormone is not coupled to β-luteinizing hormone gene transcription

S. R J Salton, M. Blum, J. A. Jonassen, R. N. Clayton, James Roberts

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

The physiological stimulation and inhibition of release of several peptide and protein hormones appears to be associated with transcription of the respective peptide- and protein hormone-encoding genes. In the current studies we investigated whether this was also true for the rat pituitary LH system. Using an anterior pituitary primary tissue culture system, we have analyzed the effects of 10-9 M GnRH on βLH gene transcription using a transcription run-on assay, and on nuclear βLH RNA levels using a highly sensitive solution hybridization-S1-nuclease protection assay. GnRH-stimulated release of LH does not appear to be coupled to a significant change in the rate of βLH gene transcription, but is associated with both a 2- to 3-fold increase in levels of the βLH primary transcript and processing intermediates and a rapid decrease in the levels of fully processed βLH mRNA in the nucleus. No significant change in βLH cytoplasmic mRNA levels, however, was associated with GnRH-stimulated release of LH, in vitro. Our findings suggest that unlike several other peptide and protein hormone systems, stimulated release of βLH by GnRH in vitro is not associated with an increase in βLH gene transcription or cytoplasmic mRNA levels.

Original languageEnglish (US)
Pages (from-to)1033-1042
Number of pages10
JournalMolecular Endocrinology
Volume2
Issue number11
StatePublished - 1988
Externally publishedYes

Fingerprint

Pituitary Hormones
Luteinizing Hormone
Gonadotropin-Releasing Hormone
Peptide Hormones
Messenger RNA
Genes
Nuclease Protection Assays
Nuclear RNA
Proteins
In Vitro Techniques

ASJC Scopus subject areas

  • Molecular Biology
  • Endocrinology, Diabetes and Metabolism

Cite this

Stimulation of pituitary luteinizing hormone secretion by gonadotropin-releasing hormone is not coupled to β-luteinizing hormone gene transcription. / Salton, S. R J; Blum, M.; Jonassen, J. A.; Clayton, R. N.; Roberts, James.

In: Molecular Endocrinology, Vol. 2, No. 11, 1988, p. 1033-1042.

Research output: Contribution to journalArticle

Salton, S. R J ; Blum, M. ; Jonassen, J. A. ; Clayton, R. N. ; Roberts, James. / Stimulation of pituitary luteinizing hormone secretion by gonadotropin-releasing hormone is not coupled to β-luteinizing hormone gene transcription. In: Molecular Endocrinology. 1988 ; Vol. 2, No. 11. pp. 1033-1042.
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