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.
調査の概要
状態
研究の種類
入学 (推定)
連絡先と場所
研究連絡先
- 名前:Chen
- 電話番号:86-15918822529
- メール:15918822529@163.com
研究場所
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Guangdong
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Guangzhou、Guangdong、中国、510150
- 募集
- The Third Affiliated Hospital of Guangzhou Medical University
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コンタクト:
- Chen Liao
- 電話番号:86+15918822529
- メール:15918822529@163.com
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参加基準
適格基準
就学可能な年齢
- 子
- 大人
- 高齢者
健康ボランティアの受け入れ
サンプリング方法
調査対象母集団
説明
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.
研究計画
研究はどのように設計されていますか?
デザインの詳細
コホートと介入
グループ/コホート |
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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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この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
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Detection and Familial Segregation of the MT-ND1 m.3700G>A Variant
時間枠: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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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
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Clinical Classification of Idiopathic Non-obstructive Azoospermia or Cryptozoospermia
時間枠: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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協力者と研究者
研究記録日
主要日程の研究
研究開始 (実際)
一次修了 (推定)
研究の完了 (推定)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。