GNAS mutation detection is related to disease severity in girls with McCune-Albright syndrome and precocious puberty

Heather A. Wagoner, Rosemary Steinmetz, Kathleen E. Bethin, Erica A. Eugster, Ora H. Pescovitz, Tamara S. Hannon

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

Background: McCune-Albright syndrome (MAS) is characterized by a triad of gonadotropin-independent precocious puberty, café au lait skin pigmentation and fibrous dysplasia of bone. MAS is due to activating mutations of GNAS, the gene encoding Gsα. Interest exists in the use of GNAS mutation analysis to make a definitive diagnosis when the phenotype is not diagnostic, i.e. in partial forms of MAS. The utility of using peripheral blood for mutation analysis in this setting has not been thoroughly evaluated. Objective: We performed a systematic analysis of genomic DNA for the detection of GNAS activating mutations in girls with MAS who presented with precocious puberty to evaluate whether identification of an activating mutation in peripheral blood is related to the presence of other features of MAS. Study Design: Genomic DNA was isolated from blood from 13 girls with gonadotropin-independent precocious puberty. A polymerase chain reaction (PCR)-based technique was performed for GNAS mutation identification. Results: GNAS activating mutations were identified in 4 patients, all of whom had classic MAS based on clinical evidence. Conclusions: Detection of activating mutations in leukocyte genomic DNA extracted from peripheral blood samples from girls with gonadotropin-independent precocious puberty was associated with the presence of other phenotypic manifestations of MAS. Until improvements in the diagnostic utility of GNAS activating mutation analysis from leukocyte genomic DNA occur, such testing in patients with atypical forms of MAS should continue to be reserved for research settings.

Original languageEnglish (US)
Pages (from-to)395-400
Number of pages6
JournalPediatric Endocrinology Reviews
Volume4
Issue numberSUPPL. 4
StatePublished - Aug 1 2007

Keywords

  • Children
  • Fibrous dysplasia
  • G-protein coupled receptor
  • Gsα, café au lait spots

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Endocrinology, Diabetes and Metabolism
  • Internal Medicine

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