Unlabelled: Purpose/aim of the study: To date, different genes have been identified as responsible for the presence of normosmic congenital hypogonadotropic hypogonadism (nCHH). Herein, we report the molecular findings regarding the analysis of PROK2, in two brothers with nCHH.
Subjects And Methods: Two siblings with nCHH, in whom mutations in GNRHR, PROKR2 and FGFR1 had been investigated previously, as well as their family were studied. DNA was amplified by PCR and sequenced for the PROK2 gene. Controls were analyzed by restriction fragment-length polymorphism. The structure of PROK2 and its mutant protein were compared using a protein molecular model.
Results: Both affected siblings exhibited a heterozygous p.R117W mutation in PROK2, while their mother was a heterozygous carrier and their father, an unaffected brother and their sister were homozygous wild type. Besides, both patients presented a homozygous p.E90K mutation in GNRHR that had been previously reported.
Conclusions: We found a novel mutation in PROK2 in two siblings in whom a mutation in the GNRHR gene had been previously reported.
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http://dx.doi.org/10.3109/07435800.2014.982327 | DOI Listing |
Asian J Androl
October 2024
Section of Andrology, Department of Urology, Istanbul School of Medicine, Istanbul 34093, Türkiye.
Hypogonadotropic hypogonadism (HH) represents a relatively rare cause of nonobstructive azoospermia (NOA), but its knowledge is crucial for the clinical andrologists, as it represents a condition that can be corrected with medical therapy in 3 quarters of cases. There are forms of congenital HH, whether or not associated with an absent sense of smell (anosmic HH or Kallmann syndrome, and normosmic HH, respectively), and forms of acquired HH. In congenital HH, complete absence of pubertal development is characteristic.
View Article and Find Full Text PDFAm J Rhinol Allergy
January 2025
Smell and Taste Clinic, Department of Otorhinolaryngology, Technical University of Dresden, Dresden, Germany.
Background: Cribriform foramina provide the openings for olfactory nerve fibers to cross from the nasal cavity to the olfactory bulb. Disruption of the olfactory nerve fibers is known to affect olfactory function, but little is known about the potential effects on the number of cribriform foramina in congenital anosmia.
Objective: This pilot study aimed to investigate whether there was a reduction in foramina in patients with acquired and congenital anosmia (including both Kallmann syndrome and isolated congenital anosmia) compared to controls with normal olfactory function.
Hum Reprod Open
September 2024
CICS-UBI, Health Sciences Research Centre, University of Beira Interior, Covilhã, Portugal.
J Pediatr Endocrinol Metab
November 2024
Department of Endocrinology and Metabolism, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
Objectives: Congenital hypogonadotropic hypogonadism (CHH) is a rare condition caused by a defect in the production, secretion or action of gonadotropin-releasing hormone. The absence of puberty and varying degrees of gonadotropic deficiency are common symptoms of this disorder. Heterogeneity exists in the clinical presentation of the different clinical subtypes and multiple genes have been implicated in CHH.
View Article and Find Full Text PDFBMJ Case Rep
January 2024
Department of Urology, Kyoto University Graduate School of Medicine, Kyoto-shi, Japan.
Congenital hypogonadotropic hypogonadism (CHH) is a genetically and clinically diverse disorder encompassing Kallmann syndrome (KS) and normosmic CHH (nCHH). Although mutations in numerous genes account for nearly 50% of CHH cases, a significant portion remains genetically uncharacterized. While most mutations follow the traditional Mendelian inheritance patterns, evidence suggests oligogenic interactions between CHH genes, acting as modifier genes to explain variable expressivity and incomplete penetrance associated with certain mutations.
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