Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

GH-Releasing Hormone Receptor Gene: A Novel Splice-Disrupting Mutation and Study of Founder Effects

Texto completo
Autor(es):
Mostrar menos -
Marui, Suemi [1] ; Trarbach, Ericka B. [1] ; Boguszewski, Margaret C. S. [2] ; Franca, Marcela M. ; Jorge, Alexander A. L. ; Inoue, Hiroshi [3] ; Nishi, Mirian Y. ; de Lacerda Filho, Luiz [2] ; Aguiar-Oliveira, Manuel H. [4] ; Mendonca, Berenice B. ; Arnhold, Ivo J. P.
Número total de Autores: 11
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Fac Med, Hosp Clin, Lab Endocrinol & Celular Mol LIM 25, Unidade Tireoide, Sao Paulo - Brazil
[2] Univ Fed Parana, Dept Pediat, BR-80060000 Curitiba, Parana - Brazil
[3] Univ Tokushima, Tokushima 770 - Japan
[4] Univ Fed Sergipe, Dept Med, Aracaju - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Hormone Research in Paediatrics; v. 78, n. 3, p. 165-172, 2012.
Citações Web of Science: 12
Resumo

Background: Mutations in GH-releasing hormone receptor gene (GHRHR) are emerging as the most common cause of autosomal recessive isolated GH deficiency (IGHD). Objective: To search for GHRHR mutations in patients with familial or sporadic IGHD and to investigate founder effects in recurring mutations. Methods: The coding region of GHRHR was entirely amplified and sequenced from DNA of 18 patients with IGHD (16 unrelated) with topic posterior pituitary lobe on MRI. Haplotypes containing promoter SNPs and microsatellites flanking GHRHR were analyzed in patients with c.57+1G>A (IVS1+1G>A) mutation of our previously published kindred and also a Brazilian patient and 2 previously reported Japanese sisters with c. 1146G>A (p.E382E) mutation. Results: A novel homozygous intronic GHRHR c.752-1G>A (IVS7-1G>A) mutation, predicting loss of the constitutive splice acceptor site, was identified in two siblings with IGHD. A compound heterozygous c.{[}57+1G>A];{[}1146G>A] and a heterozygous c.527C>T (p.A176V) were found in two sporadic cases. Haplotype analysis provided evidence for a founder effect for the c.57+1G>A mutation and independent recurrence for the c.1146G>A mutation. Conclusion: We report a novel splice-disrupting mutation in GHRHR in 2 siblings and provide evidence that all c.57+1G>A (IVS1+1G>A) mutant chromosomes have the same haplotype ancestor, indicating the occurrence of a founder effect in Brazilian patients with IGHD. Copyright (C) 2012 S. Karger AG, Basel (AU)

Processo FAPESP: 00/06677-2 - Estudo dos genes LHX3 e GHRHR em crianças com deficiência de GH
Beneficiário:Berenice Bilharinho de Mendonça
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 00/14092-4 - Diagnóstico molecular das alterações do eixo GHRH-GH-IGF-I
Beneficiário:Ivo Jorge Prado Arnhold
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 99/10692-8 - Estudo dos genes lhx3 e ghrhr em criancas com deficiencia congenita de hormonio de crescimento.
Beneficiário:Suemi Marui
Linha de fomento: Bolsas no Brasil - Pós-Doutorado