Thyrotropin (TSN) β-subunit gene expression - An example for the complex regulation of pituitary hormone genes

H. J. Steinfelder, F. E. Wondisford

Research output: Contribution to journalReview articlepeer-review

Abstract

Synthesis of pituitary hormones was shown to be efficiently regulated at the transcriptional level. The specialized function of the five cell types in the anterior pituitary is controlled by ubiquitous as well as cell-specific transcription factors. Pit-1 is such a cell-specific regulator found only in lacto-, somato- and thyrotropes which could be shown to be essential for basal expression of growth hormone (GH) and prolactin (Prl) genes and the regulated expression of Prl and thyrotropin (TSH) β-subunit genes. Identification of distinct binding sites for transcription factors and some of the mechanisms of transcriptional control shed light on the complex regulation of pituitary hormone gene expression which is exemplified for the TSHβ gene. The control of basal as well as positively and negatively regulated expression of some pituitary hormone genes becomes fairly well understood by the investigation of the role of Pit-1. Identification of different mutations in the human pit-1 gene supported the role of this protein for combined pituitary hormone deficiency (CPHD) characterized by the deficiency of GH, prolactin and TSH.

Original languageEnglish (US)
Pages (from-to)196-203
Number of pages8
JournalExperimental and Clinical Endocrinology and Diabetes
Volume105
Issue number4
DOIs
StatePublished - 1997

Keywords

  • Combined pituitary hormone deficiency (CPHD)
  • Factors
  • Pit-1
  • Pituitary hormones
  • Thyrotropin (TSH)
  • Transcription

ASJC Scopus subject areas

  • Internal Medicine
  • Endocrinology, Diabetes and Metabolism
  • Endocrinology

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