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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Role of gonadotropin-releasing hormone receptor mutations in patients with a wide spectrum of pubertal delay

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Beneduzzi, Daiane [1] ; Trarbach, Ericka B. [2, 1] ; Min, Le [3] ; Jorge, Alexander A. L. [2] ; Garmes, Heraldo M. [4] ; Renk, Alessandra Covallero [5] ; Fichna, Marta [6, 7] ; Fichna, Piotr [8] ; Arantes, Karina A. [2] ; Costa, Elaine M. F. [1] ; Zhang, Anna [3] ; Adeola, Oluwaseun [3] ; Wen, Junping [3] ; Carroll, Rona S. [3] ; Mendonca, Berenice B. [1] ; Kaiser, Ursula B. [3] ; Latronico, Ana Claudia [1] ; Silveira, Leticia F. G. [1]
Total Authors: 18
[1] Univ Sao Paulo, Hosp Clin, Fac Med, Lab Hormonios & Genet Mol LIM42, Unidade Endocrino, Sao Paulo - Brazil
[2] Univ Sao Paulo, Hosp Clin, Fac Med, Disciplina Endocrinol & Metabol, Unidade Endocrino, Sao Paulo - Brazil
[3] Brigham & Womens Hosp, Div Endocrinol Diabet & Hypertens, Boston, MA 02115 - USA
[4] Univ Estadual Campinas, Fac Ciencias Med, Dept Clin Med, Unidade Endocrinol, Campinas, SP - Brazil
[5] Hosp Santa Marcelina, Dept Endocrinol, Sao Paulo - Brazil
[6] Polish Acad Sci, Inst Human Genet, PL-00901 Warsaw - Poland
[7] Poznan Univ Med Sci, Dept Endocrinol & Metab, Poznan - Poland
[8] Poznan Univ Med Sci, Dept Pediat Diabet & Obes, Poznan - Poland
Total Affiliations: 8
Document type: Journal article
Source: Fertility and Sterility; v. 102, n. 3, p. 838-U561, SEP 2014.
Web of Science Citations: 22

Objective: To analyze the GNRHR in patients with normosmic isolated hypogonadotropic hypogonadism (IHH) and constitutional delay of growth and puberty (CDGP). Design: Molecular analysis and in vitro experiments correlated with phenotype. Setting: Academic medical center. Patient(s): A total of 110 individuals with normosmic IHH (74 male patients) and 50 with CDGP. Intervention(s): GNRHR coding region was amplified and sequenced. Main Outcome Measure(s): Novel variants were submitted to in vitro analysis. Frequency of mutations and genotype-phenotype correlation were analyzed. Microsatellite markers flanking GNRHR were examined in patients carrying the same mutation to investigate a possible founder effect. Result(s): Eleven IHH patients (10%) carried biallelic GNRHR mutations. In vitro analysis of novel variants (p.Y283H and p.V134G) demonstrated complete inactivation. The founder effect study revealed that Brazilian patients carrying the p.R139H mutation shared the same haplotype. Phenotypic spectrum in patients with GNRHR mutations varied from complete GnRH deficiency to partial and reversible IHH, with a relatively good genotype-phenotype correlation. One boy with CDGP was heterozygous for the p.Q106R variant, which was not considered to be pathogenic. Conclusion(s): GNRHR mutations are a frequent cause of congenital normosmic IHH and should be the first candidate gene for genetic screening in this condition, especially in autosomal recessive familial cases. The founder effect study suggested that the p.R139H mutation arises from a common ancestor in the Brazilian population. Finally, mutations in GNRHR do not appear to be involved in the pathogenesis of CDGP. (C) 2014 by American Society for Reproductive Medicine. (AU)

FAPESP's process: 11/15530-0 - Analysis of the gonadotropin releasing hormone receptor gene (GNRHR): mutation frequency in the Brazilian population and founder effect of the p.R139H mutation
Grantee:Daiane Beneduzzi de Deus
Support Opportunities: Scholarships in Brazil - Master