OBJECTIVE: To determine the frequency of rare nucleotide variants in GNRHR and GPR54 in a large cohort of probands (n = 166) with normosmic idiopathic hypogonadotropic hypogonadism (nIHH), characterized by mode of inheritance, testicular volume, and presence or absence of endogenous LH pulsations. METHODS: Whenever possible, probands answered detailed questionnaires, underwent full physical exams, and underwent q 10-min frequent blood sampling for LH. Exons segments for GNRHR and GPR54 were screened for mutations. Nucleotide changes were identified as rare variants if they occurred at less than 1% frequency in an ethnically matched control population. RESULTS: Sixty-two percent of male probands were classified as sporadic, meaning that no other family members had delayed puberty or nIHH. In contrast, 61% of female probands were from familial pedigrees, with either autosomal dominant or autosomal recessive inheritance. Patients displayed a broad spectrum of disease severity based on testicular size and endogenous LH pulsations. Twenty-four rare variants were identified in GNRHR (within 15 probands) and seven rare variants in GPR54 (within five probands). CONCLUSIONS: Rare variants in GNRHR are more common than GPR54 in a nIHH population.
OBJECTIVE: To determine the frequency of rare nucleotide variants in GNRHR and GPR54 in a large cohort of probands (n = 166) with normosmic idiopathic hypogonadotropic hypogonadism (nIHH), characterized by mode of inheritance, testicular volume, and presence or absence of endogenous LH pulsations. METHODS: Whenever possible, probands answered detailed questionnaires, underwent full physical exams, and underwent q 10-min frequent blood sampling for LH. Exons segments for GNRHR and GPR54 were screened for mutations. Nucleotide changes were identified as rare variants if they occurred at less than 1% frequency in an ethnically matched control population. RESULTS: Sixty-two percent of male probands were classified as sporadic, meaning that no other family members had delayed puberty or nIHH. In contrast, 61% of female probands were from familial pedigrees, with either autosomal dominant or autosomal recessive inheritance. Patients displayed a broad spectrum of disease severity based on testicular size and endogenous LH pulsations. Twenty-four rare variants were identified in GNRHR (within 15 probands) and seven rare variants in GPR54 (within five probands). CONCLUSIONS: Rare variants in GNRHR are more common than GPR54 in a nIHH population.
Authors: Magdalena Avbelj Stefanija; Marc Jeanpierre; Gerasimos P Sykiotis; Jacques Young; Richard Quinton; Ana Paula Abreu; Lacey Plummer; Margaret G Au; Ravikumar Balasubramanian; Andrew A Dwyer; Jose C Florez; Timothy Cheetham; Simon H Pearce; Radhika Purushothaman; Albert Schinzel; Michel Pugeat; Elka E Jacobson-Dickman; Svetlana Ten; Ana Claudia Latronico; James F Gusella; Catherine Dode; William F Crowley; Nelly Pitteloud Journal: Hum Mol Genet Date: 2012-07-05 Impact factor: 6.150
Authors: Hyung-Goo Kim; Jennifer Pedersen-White; Balasubramanian Bhagavath; Lawrence C Layman Journal: Front Horm Res Date: 2010-04-08 Impact factor: 2.606
Authors: Milena Gurgel Teles; Suzy D C Bianco; Vinicius Nahime Brito; Ericka B Trarbach; Wendy Kuohung; Shuyun Xu; Stephanie B Seminara; Berenice B Mendonca; Ursula B Kaiser; Ana Claudia Latronico Journal: N Engl J Med Date: 2008-02-14 Impact factor: 91.245