Pseudohypoparathyroidism type Ib in 2015

Research output: Contribution to journalArticlepeer-review

Abstract

The term pseudohypoparathryoidism (PHP) refers to a group of rare genetic and epigenetic disorders characterized by resistance to the action of parathyroid hormone (PTH) that activates cAMP signaling in target cells. Together with pseudohypoparathyroidism, Albright hereditary osteodystrophy (AHO) and progressive osseous heteroplasia (POH) represent rare, related and deeply impairing disorders encompassing heterogeneous features, such as brachydactyly, ectopic ossifications, short stature, mental retardation and endocrine deficiencies due to resistance to the action of different hormones. The two main subtypes, PHP-Ia and PHP-Ib, are caused by mutations in GNAS exons 1-13 and methylation defects in the imprinted GNAS cluster respectively, while mutations in the PRKAR1A and PDE4D genes (also involved in mediating cAMP signalling) have been demonstrated in patients with acrodysostosis, a disease of bone formation with characteristics similar to AHO. The molecular overlap among these disorders indicates the need for different classification models and seriously alters our understanding of the mechanisms through which GNAS defects, together with the new recently described defects involving other components of the cAMP signalling cascade, cause AHO-related disorders.

Original languageEnglish
Pages (from-to)101-104
Number of pages4
JournalAnnales d'Endocrinologie
Volume76
Issue number2
DOIs
Publication statusPublished - May 1 2015

Keywords

  • Albright hereditary osteodystrophy
  • GNAS
  • Imprinting
  • Pseudohypoparathyroidism

ASJC Scopus subject areas

  • Endocrinology
  • Endocrinology, Diabetes and Metabolism

Fingerprint Dive into the research topics of 'Pseudohypoparathyroidism type Ib in 2015'. Together they form a unique fingerprint.

Cite this