Maternal Inheritance of a Pathogenic MT-ND1 Mutation Causes Mitochondrial Dysfunction and Spermatogenic Failure in Men
Recruiting now
Conditions studied: Azoospermia, Nonobstructive, Cryptozoospermia
In brief
Idiopathic non-obstructive azoospermia and cryptozoospermia are severe forms of male infertility in which sperm production is absent or extremely low and the cause is often unknown. This retrospective observational study examined whether mitochondrial DNA variants, particularly the MT-ND1 m.3700G\>A variant, are associated with impaired sperm production in Chinese men. Existing clinical records and available biospecimens from affected men, eligible family members, and fertile controls were analyzed to assess familial inheritance patterns, the frequency of the variant, and its association with infertility phenotypes. No study-related treatment or intervention was provided to human participants.
Key facts
- Study ID
- NCT07691827
- Run by
- The Third Affiliated Hospital of Guangzhou Medical University
- People needed
- 1200
- Starts
- 2021-04-01
- Expected to finish
- 2027-06-01
- Last updated by the study team
- 2026-07-09
Who can join
Age: any. Sex: any. Healthy volunteers: not accepted.
You may qualify if…
- Men with idiopathic non-obstructive azoospermia or cryptozoospermia.
- Male patients undergoing a clinically indicated testicular biopsy, testicular sperm aspiration (TESA), microdissection testicular sperm extraction (micro-TESE), or a related clinical procedure, when residual clinical specimens are available.
- Comparison participants with normal spermatogenesis, including men with obstructive azoospermia and men undergoing sperm retrieval or testicular tissue evaluation for clinical reasons.
- Selected relatives and spouses of enrolled patients, when needed for genetic segregation analysis and determination of variant origin.
You may not qualify if…
- For the idiopathic non-obstructive azoospermia or cryptozoospermia cohort, azoospermia with an established alternative cause, including chromosomal abnormalities, Y-chromosome microdeletions, testicular tumors, severe trauma, prior radiotherapy or chemotherapy, or confirmed infection.
- Incomplete clinical data or inability to obtain informed consent.
- Biospecimens that do not meet quality requirements for the planned analyses.
Where it is running
- The Third Affiliated Hospital of Guangzhou Medical University — Guangzhou, Guangdong, China (enrolling)
Full record on ClinicalTrials.gov
Trial information comes from ClinicalTrials.gov and is refreshed daily. TrialsForMe does not provide medical care and does not run the studies it lists.