학술논문
Homozygosity for a novel INHA mutation in two male siblings with hypospadias, primary hypogonadism, and high-normal testicular volume.
Document Type
Academic Journal
Author
Arslan Ates E; Marmara University Pendik Training and Research Hospital, Genetic Diseases Diagnostic Center, Istanbul, Turkey.; Eltan M; Department of Pediatric Endocrinology and Diabetes, Marmara University, School of Medicine, Istanbul, Turkey.; Sahin B; Department of Urology, Marmara University, School of Medicine, Istanbul, Turkey.; Gurpinar Tosun B; Department of Pediatric Endocrinology and Diabetes, Marmara University, School of Medicine, Istanbul, Turkey.; Seven Menevse T; Department of Pediatric Endocrinology and Diabetes, Marmara University, School of Medicine, Istanbul, Turkey.; Geckinli BB; Marmara University Pendik Training and Research Hospital, Genetic Diseases Diagnostic Center, Istanbul, Turkey.; Greenfield A; Mammalian Genetics Unit, MRC Harwell Institute, Oxfordshire, UK.; Turan S; Department of Pediatric Endocrinology and Diabetes, Marmara University, School of Medicine, Istanbul, Turkey.; Bereket A; Department of Pediatric Endocrinology and Diabetes, Marmara University, School of Medicine, Istanbul, Turkey.; Guran T; Department of Pediatric Endocrinology and Diabetes, Marmara University, School of Medicine, Istanbul, Turkey.
Source
Publisher: Oxford University Press Country of Publication: England NLM ID: 9423848 Publication Model: Electronic Cited Medium: Internet ISSN: 1479-683X (Electronic) Linking ISSN: 08044643 NLM ISO Abbreviation: Eur J Endocrinol Subsets: MEDLINE
Subject
Language
English
Abstract
Background: The human INHA gene encodes the inhibin subunit alpha protein, which is common to both inhibin A and B. The functional importance of inhibins in male sex development, sexual function, and reproduction remain largely unknown.
Objective: We report for the first time two male siblings with homozygous INHAmutations.
Methods: The medical files were examined for clinical, biochemical, and imaging data. Genetic analysis was performed using next-generation and Sanger sequencing methods.
Results: Two brothers complained of gynecomastia, testicular pain, and had a history of hypospadias. Biochemistry revealed low serum testosterone, high gonadotropin and anti-Mullerian hormone, and very low/undetectable inhibin concentrations, where available. Both patients had azoospermia in the spermiogram. We have identified a homozygous 2 bp deletion (c.208_209delAG, R70Gfs*3) variant, which leads to a truncated INHA protein in both patients, and confirmed heterozygosity in the parents. The external genital development, pubertal onset and progression, reproductive functions, serum gonadotropins, and sex hormones of mother and father, who were heterozygous carriers of the identified mutation, were normal.
Conclusion: Homozygosity for INHA mutations causes decreased prenatal and postnatal testosterone production and infertility in males, while the heterozygous female and male carriers of INHA mutations do not have any abnormality in sex development and reproduction.
Objective: We report for the first time two male siblings with homozygous INHAmutations.
Methods: The medical files were examined for clinical, biochemical, and imaging data. Genetic analysis was performed using next-generation and Sanger sequencing methods.
Results: Two brothers complained of gynecomastia, testicular pain, and had a history of hypospadias. Biochemistry revealed low serum testosterone, high gonadotropin and anti-Mullerian hormone, and very low/undetectable inhibin concentrations, where available. Both patients had azoospermia in the spermiogram. We have identified a homozygous 2 bp deletion (c.208_209delAG, R70Gfs*3) variant, which leads to a truncated INHA protein in both patients, and confirmed heterozygosity in the parents. The external genital development, pubertal onset and progression, reproductive functions, serum gonadotropins, and sex hormones of mother and father, who were heterozygous carriers of the identified mutation, were normal.
Conclusion: Homozygosity for INHA mutations causes decreased prenatal and postnatal testosterone production and infertility in males, while the heterozygous female and male carriers of INHA mutations do not have any abnormality in sex development and reproduction.