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A Novel Compound Heterozygous Mutation in TDRD9 Causes Oligozoospermia
Wenhua Wang1, Yuming Feng2, Jie Dong2
1Center of Reproductive Medicine, Affiliated Jinling Hospital, Nanjing Medical University, Nanjing, 210002, Jiangsu, China.
Reproductive Sciences (Thousand Oaks, Calif.)
|August 22, 2024
Summary
Genetic mutations in the TDRD9 gene cause male infertility. This study identified compound heterozygous mutations in TDRD9, a novel cause of oligozoospermia (low sperm count), impacting spermatogenesis.
Area of Science:
- Genetics
- Reproductive Biology
- Molecular Medicine
Background:
- Oligozoospermia is a significant cause of male infertility with limited treatment options.
- The genetic underpinnings of oligozoospermia are not fully understood, necessitating further research into causative mutations.
Purpose of the Study:
- To investigate the genetic causes of oligozoospermia.
- To identify novel genetic mutations contributing to male infertility.
Main Methods:
- Whole-exome sequencing (WES) was employed to analyze the genetic makeup of an oligozoospermia patient.
- Sanger sequencing and minigene assays were used to confirm and functionalize identified mutations.
Main Results:
- A novel compound heterozygous mutation in the TDRD9 gene (splicing and frameshift mutations) was identified in the proband.
- The identified TDRD9 mutations were absent in healthy controls and demonstrated to cause abnormal splicing and premature termination of the TDRD9 protein.
Conclusions:
- Deleterious mutations in TDRD9 are a newly identified cause of oligozoospermia and male infertility.
- This research highlights TDRD9's critical role in spermatogenesis and offers a new genetic target for diagnosing male infertility.
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