- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT07691827
Maternal Inheritance of a Pathogenic MT-ND1 Mutation Causes Mitochondrial Dysfunction and Spermatogenic Failure in Men (MTND1-INA/C)
Study Protocol Used in Maternal Inheritance of a Pathogenic MT-ND1 Mutation Causes Mitochondrial Dysfunction and Spermatogenic Failure in Men
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.
Aperçu de l'étude
Statut
Les conditions
Type d'étude
Inscription (Estimé)
Contacts et emplacements
Coordonnées de l'étude
- Nom: Chen
- Numéro de téléphone: 86-15918822529
- E-mail: 15918822529@163.com
Lieux d'étude
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Guangdong
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Guangzhou, Guangdong, Chine, 510150
- Recrutement
- The Third Affiliated Hospital of Guangzhou Medical University
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Contact:
- Chen Liao
- Numéro de téléphone: 86+15918822529
- E-mail: 15918822529@163.com
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
- Enfant
- Adulte
- Adulte plus âgé
Accepte les volontaires sains
Méthode d'échantillonnage
Population étudiée
La description
Inclusion Criteria:
- 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.
Exclusion Criteria:
- 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.
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
Cohortes et interventions
Groupe / Cohorte |
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INA/C Patients
Men with idiopathic non-obstructive azoospermia or cryptozoospermia who were included in the retrospective clinical and genetic analyses.
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Fertile Controls
Fertile men who were included as comparison participants for mitochondrial DNA variant analyses.
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Family Members
Affected participants and available relatives who were included for pedigree, segregation, and maternal inheritance analyses of mitochondrial DNA variants.
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
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Detection and Familial Segregation of the MT-ND1 m.3700G>A Variant
Délai: Baseline (single genetic testing assessment at enrollment)
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Detection of the MT-ND1 m.3700G>A mitochondrial DNA variant by sequencing in available biological samples, with assessment of its distribution and maternal segregation among affected male family members, unaffected relatives, unrelated patients with idiopathic non-obstructive azoospermia or cryptozoospermia, and fertile controls.
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Baseline (single genetic testing assessment at enrollment)
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Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Clinical Classification of Idiopathic Non-obstructive Azoospermia or Cryptozoospermia
Délai: Baseline (single clinical classification based on pre-enrollment clinical records)
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Affected participants were classified as having idiopathic non-obstructive azoospermia or cryptozoospermia according to the clinical diagnosis recorded after routine semen analyses and standard clinical evaluation.
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Baseline (single clinical classification based on pre-enrollment clinical records)
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Collaborateurs et enquêteurs
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Achèvement primaire (Estimé)
Achèvement de l'étude (Estimé)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Termes MeSH pertinents supplémentaires
Autres numéros d'identification d'étude
- 82471639
Plan pour les données individuelles des participants (IPD)
Prévoyez-vous de partager les données individuelles des participants (DPI) ?
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