title: Pseudohypoparathyroidism type 1a with congenital hypothyroidism.
abstract: Pseudohypoparathyroidism type la (PHP-1a) is an uncommon disorder that results from an inactivating mutation in the GNAS gene. It can present with resistance to several hormones, in addition to parathyroid hormone (PTH). Patients may have the classic Albright's hereditary osteodystrophy (AHO) phenotype and can develop resistance to thyroid stimulating hormone (TSH), gonadotropins, growth hormone releasing hormone (GHRH), and other hormones that rely on the Gsalpha protein to regulate signal transmission at their receptors. We report two siblings with PHP-1a and congenital hypothyroidism. The patients were found to have a heterozygous mutation at nucleotide 305 in exon 4 (c305C-->A) of the GNAS gene, which has not been previously linked to congenital hypothyroidism.
authors.affiliation: Department of Pediatrics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA. jordan.pinsker@na.amedd.army.mil
authors.forename: Jordan E
authors.initials: JE
authors.lastname: Pinsker
authors.forename: William
authors.initials: W
authors.lastname: Rogers
authors.forename: Scott
authors.initials: S
authors.lastname: McLean
authors.forename: Frederick V
authors.initials: FV
authors.lastname: Schaefer
authors.forename: Cydney
authors.initials: C
authors.lastname: Fenton
mesh_terms: D000328:Adult; D002648:Child; D002675:Child, Preschool; D002864:Chromogranins; D003409:Congenital Hypothyroidism / Q000235:genetics*; D005260:Female; D019205:GTP-Binding Protein alpha Subunits, Gs / Q000235:genetics*; D006801:Humans; D017354:Point Mutation; D011547:Pseudohypoparathyroidism / Q000235:genetics*
chemical_list: D002864:Chromogranins; C406732:GNAS protein, human; D019205:GTP-Binding Protein alpha Subunits, Gs