Genome-wide copy number analysis and systematic mutation screening in 58 patients with hypogonadotropic hypogonadism

• Published in: Fertility and sterility Vol. 102; no. 4; pp. 1130 - 1136.e3
• Main Authors: Izumi, Yoko, M.D, Suzuki, Erina, M.A, Kanzaki, Susumu, M.D, Yatsuga, Shuichi, M.D, Kinjo, Saori, M.D, Igarashi, Maki, Ph.D, Maruyama, Tetsuo, M.D, Sano, Shinichiro, M.D, Horikawa, Reiko, M.D, Sato, Naoko, M.D, Nakabayashi, Kazuhiko, Ph.D, Hata, Kenichiro, M.D, Umezawa, Akihiro, M.D, Ogata, Tsutomu, M.D, Yoshimura, Yasunori, M.D, Fukami, Maki, M.D
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.10.2014
• Subjects: Adolescent; Adult; Child; Child, Preschool; Comparative Genomic Hybridization; DNA Copy Number Variations; DNA Mutational Analysis; Female; FGFR1; Gene Deletion; Gene Dosage; Genetic Predisposition to Disease; Genetic Testing - methods; Genome-Wide Association Study; genomic rearrangements; gonadotropin deficiency; Humans; Hypogonadism - diagnosis; Hypogonadism - genetics; Hypopituitarism - diagnosis; Hypopituitarism - genetics; Infant; Infant, Newborn; Internal Medicine; Male; Membrane Proteins - genetics; Middle Aged; Mutation; Obstetrics and Gynecology; Phenotype; Proto-Oncogene Proteins - genetics; Receptor, Fibroblast Growth Factor, Type 1 - genetics; Risk Factors; SOX3; SOXB1 Transcription Factors - genetics; WDR11; Young Adult; genomic rearrangements; mutation; SOX3; gonadotropin deficiency; FGFR1; WDR11
• ISSN: 0015-0282; 1556-5653
• DOI: 10.1016/j.fertnstert.2014.06.017

Objective To clarify the molecular basis of hypogonadotropic hypogonadism (HH). Design Genome-wide copy number analysis by array-based comparative genomic hybridization and systematic mutation screening of 29 known causative genes by next-generation sequencing, followed by in silico functional assessment and messenger RNA/DNA analyses of the mutants/variants. Setting Research institute. Patient(s) Fifty-eight patients with isolated HH (IHH), combined pituitary hormone deficiency (CPHD), and syndromic HH. Intervention(s) None. Main Outcome Measure(s) Frequency and character of molecular abnormalities. Result(s) Pathogenic defects were identified in 14 patients with various types of HH, although oligogenicity was not evident in this patient group. As rare abnormalities, we identified a submicroscopic deletion involving FGFR1 and an SOX3 polyalanine deletion in patients with IHH, and a WDR11 splice site mutation in a patient with CPHD. No disease-associated polymorphism was detected in the 58 patients. Conclusion(s) The present study provides further evidence that mutations and deletions in the known causative genes play a relatively minor role in the etiology of HH and that submicroscopic rearrangements encompassing FGFR1 can lead to IHH as a sole recognizable clinical feature. Furthermore, the results indicate for the first time that polyalanine deletions in SOX3 and mutations in WDR11 constitute rare genetic causes of IHH and CPHD, respectively.