血中の水銀濃度と神経行動機能
Megan Weil1, Joseph Bressler, Patrick Parsons
1Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, Md, USA. mweil@jhsph.edu
JAMA
|April 21, 2005
まとめ
この研究では,血中の水銀濃度が都市部に住む高齢者の神経行動能力に悪影響を及ぼすという確固たる証拠は見つかりませんでした. いくつかの認知機能にはわずかな関連性が見られたが,全体的な結果は,水銀がこの集団にとって重大な懸念事項ではないことを示唆している.
科学分野:
- 環境衛生 環境衛生 環境衛生
- 神経科学は神経科学である.
- ゲロントロジーはゲロントロジーの学科です.
背景:
- 高齢者の心血管健康のために魚の消費が推奨されています.
- 高齢者は認知障害のリスクが高くなります.
- 魚の神経毒性物質であるメチル水銀は,この集団に不釣り合いな影響を及ぼす可能性があります.
研究 の 目的:
- 血液中の水銀濃度と神経行動テストのスコアとの関係を調査するために.
- 都市部成人集団におけるメチル水銀暴露の潜在的なリスクを評価する.
主な方法:
- ボルチモア・メモリー・スタディの474人の参加者 (50~70歳) の横断分析.
- 全血サンプルにおける総水銀の測定.
- 20の神経行動テストスコアとの関連を分析するために使用される複数の線形回帰.
主要な成果:
- 血中平均水銀濃度は2.1マイクログラム/Lでした.
- 高濃度の水銀は視覚記憶の低下と相関する (レイ複合図の遅延記憶).
- より高い水銀レベルは,より優れた手作業の熟練度 (指でタップする) と相関しています.
結論:
- この研究では,血液中の水銀濃度と,都市部に住む高齢者の神経行動能力の低下を結びつける有力な証拠は見つかりませんでした.
- 結果は,水銀の曝露が認知機能と運動機能に混合的な影響を及ぼす可能性があることを示唆しています.
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