職業的鉛曝露は酸化ストレス、肺機能障害、および運動耐容能の低下を誘発する:横断研究
Ukbe Sirayder1, Cihangir Acik1
1Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Nuh Naci Yazgan University, Kayseri, Kocasinan, Türkiye.
Toxicology letters
|January 15, 2026
まとめ
職業的鉛曝露は運動能力と肺機能を著しく低下させ、酸化ストレスが関与している。累積曝露期間が、労働者におけるこれらの悪影響の主要な予測因子である。
科学分野:
- 環境衛生学
- 労働医学
- 毒性学
背景:
- 職業的鉛曝露は、公衆衛生上の重要な懸念事項である。
- 鉛毒性は複数の臓器系に影響を与える可能性がある。
- 以前の研究では生理学的機能への潜在的な影響が示唆されているが、包括的な多系統的評価は不足している。
研究 の 目的:
- 職業的鉛曝露が運動耐容能に及ぼす影響を評価すること。
- 鉛誘発性の生理学的変化における酸化ストレスの役割を調査すること。
- 鉛曝露労働者の肺機能への影響を評価すること。
主な方法:
- 鉛曝露男性労働者48名と対照群男性労働者51名を対象とした横断研究。
- 漸増シャトルウォークテスト(ISWT)を用いて運動耐容能を評価した。
- スパイロメトリー、血中鉛濃度(ICP-MS)、および酸化ストレスマーカー(MDA、FRAP)を用いて肺機能を測定した。
主要な成果:
- 鉛曝露労働者は、ISWT距離の有意な低下、呼吸困難および疲労の増加、MDAの増加およびFRAPの低下を示した。
- 曝露群では、努力性肺活量(FVC)の有意な低下が観察された。
- 鉛曝露期間は、運動耐容能の低下、呼吸困難、疲労の増加、およびFVCの低下の有意な予測因子であった。
結論:
- 職業的鉛曝露は、運動パフォーマンスと肺機能に悪影響を及ぼす。
- 酸化ストレスがこれらの障害に寄与しており、累積曝露期間が重要な要因である。
- 本研究は、運動、生化学的、および呼吸器系のパラメータを統合することにより、鉛曝露の全身性生理学的負担に関する新たな洞察を提供する。
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