不妊治療を求める集団における精子生成と精液の品質の発達ウィンドウ中の環境大気汚染
Lindsey M Russo1, J Richard Pilsner2, Timothy P Canty3
1Division of General Internal Medicine, Weill Cornell Medicine, 420 East 70th Street, New York, NY 10021, USA.
Ecotoxicology and environmental safety
|August 31, 2025
まとめ
一般的な大気汚染物質であるオゾンや微細粒子への曝露は 男性の生育能力に悪影響を及ぼします 精子発達の重要な段階で 特定の汚染物質が精子数,運動能力,形質に影響します
科学分野:
- 環境 健康
- 生殖生物学
- 毒理学について
背景:
- 以前の研究では,大気汚染が精液の質に影響を及ぼすことが示されましたが,特定の発達期および低〜中程度の汚染レベルでの影響は不明です.
- 精子形成は,約74日間で起こり,ミトーシス,ミオシス,精子形成,精子形成という 異なる段階があります.
研究 の 目的:
- 特定の大気汚染物質と精液品質のパラメータとの関係を調査する.
- 精子形成の発達期間の被曝のタイミングが精子の質に影響するかどうかを判断する.
- 男性の生殖健康に及ぼす低から中等レベルの大気汚染の影響を評価する.
主な方法:
- 2015年の不妊カップルの男性パートナーを含む葉酸と亜鉛サプリメント試験 (2013-2018) のデータの分析.
- 精液の質の評価と2,4,6ヶ月の追跡調査
- 参加者の住居での毎日の汚染物質レベル (PM2.5,SO2,NO2,O3) を推定するために,74日間の精子形成の窓と特定の発達段階の平均曝露を活用した.
主要な成果:
- メイオシスI-IIおよび精子生成中のオゾン (O3) 曝露は精子形態の減少と関連していた (%差分はそれぞれ - 6. 73および - 3. 83).
- 精子発生時の微細粒子 (PM2.5) とO3の曝露は精子数と精子濃度の低下と相関する.
- 精子発育中のPM2. 5への曝露は,精子運動の進行性低下とも関連していました.
結論:
- 低レベルから中等レベルの大気汚染,特にオゾンとPM2.5は精液の質に悪影響を及ぼします.
- 精子形成のメオシスと精子形成の段階でオゾンに曝露すると,正常な精子形態が著しく損なわれる可能性があります.
- 発見は,環境からの暴露が男性の生殖健康と生殖能力に及ぼす重大な影響を強調しています.
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