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Published on: May 27, 2022
Genetic variants underlying spermatogenic arrests in men with non-obstructive azoospermia
1Department of Histology and Embryology, Akdeniz University School of Medicine, Antalya, Turkey.
Abstract:
Spermatogenic arrest is a severe form of non-obstructive azoospermia (NOA), which occurs in 10-15% of infertile men. Interruption in spermatogenic progression at premeiotic, meiotic, or postmeiotic stage can lead to arrest in men with NOA. Recent studies have intensively focused on defining genetic variants underlying these spermatogenic arrests by making genome/exome sequencing. A number of variants were discovered in the genes involving in mitosis, meiosis, germline differentiation and other basic cellular events. Herein, defined variants in NOA cases with spermatogenic arrests and created knockout mouse models for the related genes are comprehensively reviewed. Also, importance of gene panel-based screening for NOA cases was discussed. Screening common variants in these infertile men with spermatogenic arrests may contribute to elucidating the molecular background and designing novel treatment strategies.
Insights
Spermatogenic arrest, a cause of infertility in men, is linked to genetic variants affecting cell division and germline development. Understanding these variants can help develop new treatments for non-obstructive azoospermia.
Area of Science:
- Reproductive Biology
- Genetics
- Male Infertility
Background:
- Spermatogenic arrest causes non-obstructive azoospermia (NOA) in 10-15% of infertile men.
- This arrest results from disruptions in premeiotic, meiotic, or postmeiotic germ cell progression.
Purpose of the Study:
- To review genetic variants associated with spermatogenic arrest in NOA.
- To discuss the utility of gene panel screening for identifying genetic causes of NOA.
Main Methods:
- Comprehensive review of genetic variants identified through genome/exome sequencing in NOA patients.
- Analysis of knockout mouse models for genes implicated in spermatogenic failure.
- Discussion on the application of gene panel-based screening.
Main Results:
- Numerous genetic variants have been identified in genes crucial for mitosis, meiosis, and germline differentiation.
- Knockout mouse models have been developed to study the functional impact of these variants.
- Gene panel screening shows promise for diagnosing NOA cases.
Conclusions:
- Genetic variants play a significant role in spermatogenic arrest and NOA.
- Further research into these variants and gene panel screening can advance diagnostic and therapeutic strategies for male infertility.
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