Functional evidence implicating NOTCH2 missense mutations in primary ovarian insufficiency etiology

2018 ◽  
Vol 40 (1) ◽  
pp. 25-30 ◽  
Author(s):  
Liliana C. Patiño ◽  
Isabelle Beau ◽  
Adrien Morel ◽  
Brigitte Delemer ◽  
Jacques Young ◽  
...  
Keyword(s):  
Primary Ovarian Insufficiency ◽  
Missense Mutations ◽  
Ovarian Insufficiency

scholarly journals Identification of Multiple Gene Mutations Accounts for a new Genetic Architecture of Primary Ovarian Insufficiency

2016 ◽  
Vol 101 (12) ◽  
pp. 4541-4550 ◽  
Author(s):  
Justine Bouilly ◽  
Isabelle Beau ◽  
Sara Barraud ◽  
Valérie Bernard ◽  
Kemal Azibi ◽  
...  
Keyword(s):  
Candidate Genes ◽  
Gene Mutations ◽  
Primary Ovarian Insufficiency ◽  
Potential Candidate ◽  
Missense Mutations ◽  
Ovarian Insufficiency ◽  
Monogenic Disorder ◽  
Gene Encoding ◽  
Multiple Loci

Context: Idiopathic primary ovarian insufficiency (POI) is a major cause of amenorrhea and infertility. POI affects 1% of women before age 40 years, and several genetic causes have been reported. To date, POI has been considered a monogenic disorder. Objective: The aim of this study was to identify novel gene variations and to investigate if individuals with POI harbor mutation in multiple loci. Patients and Methods: One hundred well-phenotyped POI patients were systematically screened for variants in 19 known POI loci (and potential candidate genes) using next-generation sequencing. Results: At least one rare protein-altering gene variant was identified in 19 patients, including missense mutations in new candidate genes, namely SMC1β and REC8 (involved in the cohesin complex) and LHX8, a gene encoding a transcription factor. Novel or recurrent deleterious mutations were also detected in the known POI candidate genes NOBOX, FOXL2, SOHLH1, FIGLA, GDF9, BMP15, and GALT. Seven patients harbor mutations in two loci, and this digenicity seems to influence the age of symptom onset. Conclusions: Genetic anomalies in women with POI are more frequent than previously believed. Digenic findings in several cases suggest that POI is not a purely monogenic disorder and points to a role of digenicity. The genotype-phenotype correlations in some kindreds suggest that a synergistic effect of several mutations may underlie the POI phenotype.

BMPR1A and BMPR1B Missense Mutations Cause Primary Ovarian Insufficiency

2019 ◽  
Vol 105 (4) ◽  
pp. e1449-e1457 ◽  
Author(s):  
Lucie Renault ◽  
Liliana C Patiño ◽  
Françoise Magnin ◽  
Brigitte Delemer ◽  
Jacques Young ◽  
...  
Keyword(s):  
Ovarian Function ◽  
Chromosomal Abnormalities ◽  
Primary Ovarian Insufficiency ◽  
Bone Morphogenic Protein ◽  
Bmp Signaling ◽  
Pathophysiological Mechanism ◽  
Missense Mutations ◽  
Ovarian Insufficiency ◽  
The Impact

Abstract Context Primary ovarian insufficiency (POI) is a frequently occurring disorder affecting approximately 1% of women under 40 years of age. POI, which is characterized by the premature depletion of ovarian follicles and elevated plasma levels of follicle-stimulating hormone, leads to infertility. Although various etiological factors have been described, including chromosomal abnormalities and gene mutations, most cases remain idiopathic. Objective To identify and to functionally validate new sequence variants in 2 genes that play a key role in mammalian ovarian function, BMPR1A and BMPR1B (encoding for bone morphogenic protein receptor), leading to POI. Methods The impact on bone morphogenic protein (BMP) signaling of BMPR1A and BMPR1B variants, previously identified by whole-exome sequencing on 69 women affected by isolated POI, was established by different in vitro functional experiments. Results We demonstrate that the BMPR1A-p.Arg442His and BMPR1B-p.Phe272Leu variants are correctly expressed and located but lead to an impairment of downstream BMP signaling. Conclusion In accordance with infertility observed in mice lacking Bmpr1a in the ovaries and in Bmpr1b-/- mice, our results unveil, for the first time, a link between BMPR1A and BMPR1B variants and the origin of POI. We show that BMP signaling impairment through specific BMPR1A and BMPR1B variants is a novel pathophysiological mechanism involved in human POI. We consider that BMPR1A and BMPR1B variants constitute genetic biomarkers of the origin of POI and have clinical utility.

Fundamental role of BMP15 in human ovarian folliculogenesis revealed by null and missense mutations associated with primary ovarian insufficiency

2020 ◽  
Vol 41 (5) ◽  
pp. 983-997 ◽  
Author(s):  
Raffaella Rossetti ◽  
Ilaria Ferrari ◽  
Ilaria Bestetti ◽  
Silvia Moleri ◽  
Francesco Brancati ◽  
...  
Keyword(s):  
Primary Ovarian Insufficiency ◽  
Missense Mutations ◽  
Ovarian Insufficiency ◽  
Ovarian Folliculogenesis

Demographic characteristics and therapeutical management in patients with primary ovarian insufficiency

2014 ◽  
Author(s):  
Mariana Tome ◽  
Pinillos Guillermo Martinez De ◽  
Mariola Mendez ◽  
Quiros Juan Manuel Garcia De ◽  
Jose Ignacio Fernandez Pena ◽  
...  
Keyword(s):  
Primary Ovarian Insufficiency ◽  
Demographic Characteristics ◽  
Ovarian Insufficiency

scholarly journals Deep phenotyping classical galactosemia: clinical outcomes and biochemical markers

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Mendy M Welsink-Karssies ◽  
Sacha Ferdinandusse ◽  
Gert J Geurtsen ◽  
Carla E M Hollak ◽  
Hidde H Huidekoper ◽  
...  
Keyword(s):  
Clinical Outcome ◽  
Newborn Screening ◽  
Clinical Outcomes ◽  
Movement Disorders ◽  
Brain Mri ◽  
Primary Ovarian Insufficiency ◽  
Ovarian Insufficiency ◽  
Classical Galactosemia ◽  
Intellectual Outcome

Abstract Early diagnosis and dietary treatment do not prevent long-term complications, which mostly affect the central nervous system in classical galactosemia patients. The clinical outcome of patients is highly variable, and there is an urgent need for prognostic biomarkers. The aim of this study was first to increase knowledge on the natural history of classical galactosemia by studying a cohort of patients with varying geno- and phenotypes and second to study the association between clinical outcomes and two possible prognostic biomarkers. In addition, the association between abnormalities on brain MRI and clinical outcomes was investigated. Classical galactosemia patients visiting the galactosemia expertise outpatient clinic of the Amsterdam University Medical Centre were evaluated according to the International Classical Galactosemia guideline with the addition of an examination by a neurologist, serum immunoglobulin G N-glycan profiling and a brain MRI. The biomarkers of interest were galactose-1-phosphate levels and N-glycan profiles, and the clinical outcomes studied were intellectual outcome and the presence or absence of movement disorders and/or primary ovarian insufficiency. Data of 56 classical galactosemia patients are reported. The intellectual outcome ranged from 45 to 103 (mean 77 ± 14) and was <85 in 62%. Movement disorders were found in 17 (47%) of the 36 tested patients. In females aged 12 years and older, primary ovarian insufficiency was diagnosed in 12 (71%) of the 17 patients. Significant differences in N-glycan peaks were found between controls and patients. However, no significant differences in either N-glycans or galactose-1-phosphate levels were found between patients with a poor (intellectual outcome < 85) and normal intellectual outcome (intellectual outcome ≥ 85), and with or without movement disorders or primary ovarian insufficiency. The variant patients detected by newborn screening, with previously unknown geno- and phenotypes and currently no long-term complications, demonstrated significantly lower galactose-1-phospate levels than classical patients (P < 0.0005). Qualitative analysis of the MRI’s demonstrated brain abnormalities in 18 of the 21 patients, more severely in patients with a lower intellectual outcome and/or with movement disorders. This study demonstrates a large variability in clinical outcome, which varies from a below average intelligence, movement disorders and in females primary ovarian insufficiency to a normal clinical outcome. In our cohort of classical galactosemia patients, galactose-1-phosphate levels and N-glycan variations were not associated with clinical outcomes, but galactose-1-phosphate levels did differentiate between classical and variant patients detected by newborn screening. The correlation between brain abnormalities and clinical outcome should be further investigated by quantitative analysis of the MR images. The variability in clinical outcome necessitates individual and standardized evaluation of all classical galactosemia patients.

scholarly journals Menarche in primary ovarian insufficiency after a month of hormone replacement therapy: a case report

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Biwen Cheng
Keyword(s):  
Replacement Therapy ◽  
Hormone Replacement ◽  
Estrogen Therapy ◽  
Primary Ovarian Insufficiency ◽  
Hormonal Replacement Therapy ◽  
Delayed Puberty ◽  
Ovarian Insufficiency ◽  
Breakthrough Bleeding ◽  
Hormonal Replacement ◽  
Ovarian Dysgenesis

Abstract Background Gynecologic anomalies, including uterine agenesis and ovarian dysgenesis, are some of the several differential diagnoses in adolescent females with primary amenorrhea and delayed puberty. Primary ovarian insufficiency is reported in the clinical practice of reproductive endocrinology can be determined by conducting sex hormone tests to evaluate the hypothalamic-pituitary-ovarian axis. However, confirmation of Mullerian agenesis by image modalities can be extremely challenging. Once the diagnosis is established, breakthrough bleeding usually occurs 2 to 3 years after hormonal replacement therapy. Case presentation We report a case of a seventeen year old Taiwanese female, 46 XX karyotype, with ovarian dysgenesis and an initial tentative diagnosis of uterine agenesis who experienced a breakthrough bleeding after a month of hormonal replacement therapy. Conclusions The breakthrough bleeding after a month of estrogen therapy in primary ovarian insufficiency is uncommon, and the diagnosis of the absent uterus can have an extensive psychological impact on patients and their families.

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