Molecular and clinical aspects of ghrh receptor mutations

Valentina Corazzini, Roberto Salvatori

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The growth hormone (GH)-releasing hormone (GHRH) receptor (GHRHR) belongs to the G protein-coupled receptor family. It binds GHRH resulting in somatotroph cell proliferation and stimulation of GH secretion. Mutations in the gene encoding for GHRHR (GHRHR, OMIM No. 139191) are being reported with increasing frequency in familial isolated GH deficiency. To date, the reported GHRHR mutations include eight missense, seven splice, three microdeletions, and two non-sense mutations. One promoter mutation has also been reported. Most of these mutations show a recessive mode of inheritance. The phenotype includes reduced but not absent serum GH, with abnormal response to a variety of stimuli, and low serum insulin-like growth factor-1 levels, resulting in proportionate growth failure which becomes evident in the first year of life. These patients respond well to GH replacement therapy. Phenotypical observations coming from some unusually large kindreds with untreated GH deficiency due to homozygous GHRHR mutations have allowed the study of the consequences of lifetime lack of GH. This chapter reviews the structure and the role of the GHRHR together with the clinical aspects associated with its mutations.

Original languageEnglish (US)
Title of host publicationHormone Resistance and Hypersensitivity
Subtitle of host publicationFrom Genetics to Clinical Management
EditorsMohamad Maghnie, Renata Lorini, Sandro Loche, Marco Cappa, Lucia Ghizzoni
Pages106-117
Number of pages12
DOIs
StatePublished - Apr 2 2013

Publication series

NameEndocrine Development
Volume24
ISSN (Print)1421-7082
ISSN (Electronic)1662-2979

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Endocrinology, Diabetes and Metabolism
  • Endocrinology
  • Endocrine and Autonomic Systems

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