Abstract
Purpose
Premature ovarian insufficiency (POI) affects approximately 1% of women before the age of 40. Genetic contribution is a significant component of POI. The NOBOX gene was considered one of the major genetic causes of POI. However, the pathogenicity and the penetrance of NOBOX variants remain unclear.
Methods
We studied the whole coding region of the NOBOX gene by next generation sequencing in a cohort of 810 patients with POI, and we compared the frequency of each identified NOBOX variant to the general population taking into account the ethnicity of each individual.
Results
Screening of the whole coding region of the NOBOX gene allowed us to identify 35 different variants, including 5 loss-of-function variants. In total, 171 patients with POI (25%) carried out at least one NOBOX variant. Regarding missense variants, we observed a significant overrepresentation of the most frequent ones in our 810 POI patients as compared to the general, except for p.(Arg117Trp). However, taking into account the ethnic origin of the individuals, we observed no significant OR difference for p.(Arg44Leu) and p.(Arg117Trp) in African subgroup and for p.(Asp452Asn) in European subgroup.
Conclusion
This population study suggests that the p.(Arg44Leu) variant could be considered benign variant and that the p.(Asp452Asn) and p.(Arg117Trp) variants could be considered moderate risk pathogenic variants with probably partial and very low penetrance and/or expressivity. In contrast, p.(Gly91Trp) and p.(Gly152Arg) variants could be considered pathogenic variants with a moderate functional impact.
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Data availability
The data that support the findings of the study are available from the corresponding author and the first author upon reasonable request.
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LEK and TB co-conceptualized and designed the study. SP, PJ, DMG, EP, SJC, PT, SCM, and GPB reviewed medical records and collected patient data. CF performed molecular analysis and provided data analysis, tables, and figures. PJ, TB, CV, JMD, and LEK have written content toward the first draft of the manuscript. All authors reviewed and revised the manuscript and approved the final version as submitted and agree to be accountable for all aspects of the work. All authors are responsible for the accuracy and integrity of the work.
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Jordan, P., Verebi, C., Perol, S. et al. NOBOX gene variants in premature ovarian insufficiency: ethnicity-dependent insights. J Assist Reprod Genet 41, 135–146 (2024). https://doi.org/10.1007/s10815-023-02981-y
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DOI: https://doi.org/10.1007/s10815-023-02981-y