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Cited by 18Hypothalamic control of reproductive hormonesGrowth Hormone and Insulin-like Growth FactorsPituitary Gland Disorders and Treatments

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Mutations in gonadotropin-releasing hormone signaling pathway in two nIHH patients with successful pregnancy outcomes

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Zernov, Nikolay, Skoblov, Mikhail, Baranova, Ancha, Boyarsky, Konstantin·2016·Reproductive Biology and Endocrinology

Abstract

BACKGROUND: Anomalous levels of gonadotropin-releasing hormone (GnRH) secretion result in a variety of reproductive phenotypes associated with infertility or subfertility. The normosmic isolated hypogonadotropic hypogonadism (nIHH) is due to a failure of either GnRH pulsatile secretion in hypothalamus or its reception in pituitary. The spectrum of nIHH-associated alterations continues to expand, especially when additional ethnic populations are investigated. The aim of this study was to uncover genetic causes for nIHH in patients of Russian origin. METHODS: For two nIHH patients referred to infertility clinic, both exons and promoter sequences of 6 GnRH signaling genes were sequenced. RESULTS: Patient 1 was a compound heterozygote for mutations in GnRH and its receptor encoding genes, while in Patient 2 GnRHR mutations were found in homozygous state. In both patients, the coding frame of GnRHR gene harbored missense-mutation Arg139His previously described as founder mutation in Polish and Brazilan patients. IVF/ET treatments were successful, with phenotypically healthy offsprings delivered. CONCLUSION: Polish founder mutation Arg139His in GnRHR was found in two nIHH patients originating from Western region of Russia. Common variant of GnRH-encoding gene, Trp16Ser, could possibly contribute to reproductive phenotypes in patients with heterozygous mutations of other GnRH signaling pathway genes.

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Fig. 1 Sanger sequencing chromatograms of mutated loci in patients and their family members. a Sequencing chromatogram of the exon 1 of GNRH1 gene in Patient 1 and Patient 2 genomes. b Sequencing chromatogram of the exon 1 of GNRHR gene in Patient 1 and Patient 2 genomes. c Sequencing chromatogram of the exon 3 of GNRHR gene in Patient 1 genomes. d Sequencing chromatogram of the exon 1 of GNRHR gene in the genomes of mothers of Patient 1 and Patient 2. e Sequencing chromatogram of the exon 1 of GNRHR gene in the genome of Patient 1 offspring
Fig. 1 Sanger sequencing chromatograms of mutated loci in patients and their family members. a Sequencing chromatogram of the exon 1 of GNRH1 gene in Patient 1 and Patient 2 genomes. b Sequencing chromatogram of the exon 1 of GNRHR gene in Patient 1 and Patient 2 genomes. c Sequencing chromatogram of the exon 3 of GNRHR gene in Patient 1 genomes. d Sequencing chromatogram of the exon 1 of GNRHR gene in the genomes of mothers of Patient 1 and Patient 2. e Sequencing chromatogram of the exon 1 of GNRHR gene in the genome of Patient 1 offspringCC BY · PubMed Central

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Metadata

Authors
Zernov, N., Skoblov, M., Baranova, A., & Boyarsky, K.
Affiliations
  • Research Centre for Medical Genetics (RU)
  • Moscow Institute of Physics and Technology (RU)
  • Saint Petersburg State Pediatric Medical University (RU)
Corresponding author
Baranova, Ancha
Venue
Reproductive Biology and Endocrinology
Published
2016-08-20
Volume
14
Issue
1
Pages
48-48
ISSN
1477-7827 (ISSN-L)
OpenAlex
W2515975096
Cited by
18
References
12
Citations by year
2025: 1 · 2024: 2 · 2023: 2 · 2022: 2 · 2021: 1 · 2020: 3 · 2019: 2 · 2018: 3 · 2017: 1
FWCI
2.66
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Reproductive Biology and Endocrinology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Growth Hormone and Insulin-like Growth Factors
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Pituitary Gland Disorders and Treatments
Keywords
gonadotropin-releasing hormone, GnRH receptor, GnRH signaling, compound heterozygosity, infertility, pregnancy outcomes, Russian patients, genetic diagnosis
MeSH terms
Adult, Female, Humans, Hypogonadism, Infant, Newborn, Infertility, Female, Gonadotropin-Releasing Hormone, Male, Pregnancy, Pregnancy Outcome, Signal Transduction, Mutation, Missense, Sperm Injections, Intracytoplasmic

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