依存症への移行は,シナプス可塑性の持続的な障害と関連しています
Fernando Kasanetz1, Véronique Deroche-Gamonet, Nadège Berson
1INSERM U862, NeuroCentre Magendie, 147 Rue Léo Saignat, 33077, Bordeaux Cedex, France.
まとめ
慢性的な薬物曝露は,脳の機能を変化させます. 依存症は,重要なシナプス可塑性メカニズムであるアキュンベンス核の長期的なうつ病 (LTD) と関連しており,制御された摂取は回復を可能にします.
科学分野:
- 神経生物学 神経生物学とは
- 依存症 科学 科学 依存症 科学
- シナプス性可塑性 (Synaptic Plasticity) とは,シナプス性可塑性 (Synaptic Plasticity) とは,シナプス性可塑性 (Synaptic Plasticity) とは,シナプス性可塑性 (Synaptic Plasticity) とは,シナプス性可塑性 (Synaptic Plasticity) とは,シナプス性可塑性 (Synaptic Plasticity) とは,シナプス性 (Synaptic Plasticity) とは,シナプス性 (Synaptic Plasticity) とは,シナプス性 (Synaptic Plasticity) とは,シナプス性 (Synaptic Plasticity) とは,シナプス性 (Synaptic Plasticity) とは,シナプス性 (Synaptic Plasticity) とは
背景:
- 慢性的な薬物使用は脳に重大な変化をもたらします.
- 依存症への移行を促す特定の神経生物学的な適応は不明である.
- 長期うつ病 (LTD) は,アキュンベンス核におけるシナプス可塑性の重要な形態である.
研究 の 目的:
- 依存症への移行の基礎となる神経生物学的適応を調査する.
- 依存症の発達における長期的なうつ病 (LTD) の役割を決定する.
- ネズミのモデルで,慢性的なコカインの自己投与によってLTDがどのように影響されるかを調べる.
主な方法:
- コカインの自己投与のラットモデルを利用した.
- 核アキュンベンスの評価された長期抑うつ (LTD)
- 依存症の特徴を発症した動物におけるLTDの比較と,コントロールされた摂取を維持した動物の比較.
主要な成果:
- コカインの自己投与は迅速にLTD.を抑制する.
- 依存症の特徴を示す動物は,永久に障害のあるLTDを示した.
- 薬物摂取をコントロールした非中毒マウスは,LTDの漸進的な回復を示した.
結論:
- 持続的に障害のあるLTDは,中毒への移行を媒介する可能性があります.
- 依存症は,環境の調節に抵抗する,柔軟性のない薬物探しの行動と関連しています.
- LTD障害は,中毒の発達のための潜在的な神経生物学的なマーカーです.
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