Jornal Brasileiro de Patologia e Medicina Laboratorial (Dec 2004)

Diagnóstico clínico e laboratorial da deficiência isolada do hormônio do crescimento em crianças e adolescentes portadores da mutação no gene do receptor do hormônio liberador do hormônio de crescimento em Itabaianinha, Sergipe Clinical and laboratorial diagnosis isolated deficiency of growth hormone in children and adolescents with mutation in receptor gene of growth hormone-releasing hormone in Itabaianinha, SE, Brazil

  • Carlos Alberto Menezes,
  • Valdinaldo Aragão,
  • Fabrício Rios-Santos,
  • Manuel Hermínio Aguiar-Oliveira

DOI
https://doi.org/10.1590/S1676-24442004000600003
Journal volume & issue
Vol. 40, no. 6
pp. 371 – 378

Abstract

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INTRODUÇÃO: Em Itabaianinha - Sergipe é encontrado o maior grupo descrito na literatura de habitantes com o fenótipo associado à deficiência isolada do hormônio do crescimento (DIGH) em função da mutação IVS1+ 1, G->A no gene do receptor do hormônio liberador do hormônio de crescimento (GHRH). O objetivo do presente trabalho é descrever o fenótipo clínico e laboratorial dos pacientes da cidade. MATERIAIS E MÉTODOS: Foram selecionados 12 indivíduos com fenótipo clínico de DIGH e 10 voluntários controles sem deficiência de GH, ambos com idade inferior a 20 anos, para estudo de corte transversal. RESULTADOS E DISCUSSÃO: Os portadores de DIGH apresentaram hiporresponsividade ao teste de clonidina e à hipoglicemia insulínica e níveis séricos abaixo dos valores de referência para o fator de crescimento insulina símile I (IGF-I) e proteína ligadora do fator de crescimento símile a insulina 3 (IGFBP-3) (6 ±4ng/ml e 510 ± 151ng/ml, respectivamente p INTRODUCTION: In Itabianinha, Sergipe, it was found the largest known population group with an IDGH associated phenotype, related to IVS1+1 mutation, G->A in the gene of GHRH receptor. The aim of the present work is to describe the clinical and laboratorial phenotype of these patients. MATERIAL AND METHODS: Twelve young patients, under 20 years old, and 10 volunteer controls without the GH deficiency were selected for a transversal study. RESULTS AND DISCUSSION: IDGH individuals presented hyporesponsivity to the clonidine test and to the hypoglycemic insulinic test. Furthermore, they presented low levels of IGF-I and IGFBP-3 as compared with reference values (6 ± 4ng/ml and 510 ± 151ng/ml, respectively p < 0.01). There were no alterations in the thyroid, adrenal and gonad functions. The sella turcica study was also normal. The patients from Itabaianinha, when compared with other data of patients with GHRH-R mutations, were shorter, and presented characteristic typical facies and central adiposity. CONCLUSION: The results showed that the IDGH patients from Itabaininha presented a growth hormone isolated Type IB deficiency. In addition, the lower height was not associated with pituitary alterations or other non-hormone pathologies.

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