職業上のマンガネス曝露におけるコレリン機能障害

T Noah Hutson¹, Susan Searles Nielsen², Natalie Senini¹

¹Department of Neurology, Barrow Neurological Institute, 240 W Thomas Rd, Phoenix, AZ 85013 USA; Program in Physical Therapy, Washington University School of Medicine, 660 S. Euclid Ave, St. Louis, MO 63110 USA.

Neurotoxicology

|September 5, 2025

まとめ

マンガネス (Mn) 曝露は脳のコレリン活性を低下させ,認知制御と言語流暢性に影響を及ぼします. このコレリン機能障害は,Mn神経毒性およびパーキンソン症候群の初期バイオマーカーとして機能する.

科学分野:

神経科学
毒理学について
放射化学

背景:

マンガン (Mn) の過剰曝露はパーキンソン病と認知障害を引き起こす.
Mnの神経毒性のメカニズムは完全に理解されていません.
Mn誘発の認知障害におけるコレリン系の役割については,さらなる調査が必要である.

研究の目的:

Mnの曝露と脳のコレリン作用の関係を調べる
コリン作用がMnに曝露した労働者の認知障害をどのように媒介するかを評価する.
初期の Mn 神経毒性の潜在的なバイオマーカーを特定する.

主な方法:

膀性アセチルコリントランスポーター (VAChT) ラジオトレーサー (VAT) によるポジトロン放出トモグラフィー (PET) による脳コレリン機能の評価.
労働歴とMRIパリダル指数によるMn被曝の推定
言語流暢性 (VF) を含む一連のテストを用いた認知制御評価

主要な成果:

Mnの曝露は尾部と皮質の領域におけるコリナージックVAT結合の減少と相関する.
コリン機能は,Mn曝露と認知制御のパフォーマンスとの関連を有意に媒介した.
コリナージック欠乏症は,言語流暢性の低下と関連していた.

結論:

脳の重要な領域におけるホルモン活性低下と関連している.
コリン機能障害は,Mn曝露と認知障害を結びつける重要なメカニズムです.
尾関節と皮質のコレリン活性が,早期の Mn 神経毒性およびパーキンソン症候群を示す可能性があります.

キーワード:

マンガンペットバイオマーカーコリン効果神経毒性学

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