コカインによって引き起こされる前頭前皮質の低活性性を救うことは,コカインを必死に探すことを防ぐ
Billy T Chen1, Hau-Jie Yau, Christina Hatch
1Intramural Research Program, National Institute on Drug Abuse, Baltimore, Maryland 21224, USA. billy.chen@nih.gov
Nature
|April 5, 2013
まとめ
慢性的なコカイン使用は前頭前皮質の機能を低下させ,強迫的な薬物探求につながります. この脳の領域を刺激することで,依存症に対する新しい治療法を提供できるかもしれません.
科学分野:
- 神経科学は神経科学である.
- 依存症の研究 依存症の研究
- 行動薬理学 行動薬理学
背景:
- 薬物中毒は,ネガティブな結果にもかかわらず,強制的な薬物探求によって特徴付けられます.
- 前頭前皮質の機能不全と抑制制御の喪失は,中毒に関連しています.
- 慢性的な薬物使用が皮質の活動に与える影響と,強迫的行動におけるその役割は不明である.
研究 の 目的:
- 慢性的なコカインの自己投与が前頭前皮質のニューロン活動を変化させるかどうかを調査する.
- 皮質刺激性の低下がネズミのモデルでコカイン探しの強迫性を促進するかどうかを判断する.
- 依存症治療のための前頭前野の活動を調節する治療の可能性を探る.
主な方法:
- 足のショックに対する嫌悪感を含む,コカインを求める強迫性のラットモデルを使用しました.
- プレリンビック皮質の深層ピラミダルニューロンのex vivo内在刺激性を評価した.
- プリリンビック皮質の活動を刺激または抑制するために,in vivo optogeneticsで使用されます.
主要な成果:
- コカインを長時間自己投与すると,プレリンビック皮質の神経刺激性が低下し,特に強迫的な探求者において減少した.
- プリリンビック皮質のオプトジェネティック刺激により,コカインを強迫的に探すのを防ぐことができました.
- プリリンビック皮質のオプトジェネティック阻害は,強迫的なコカイン探求を悪化させた.
結論:
- 強制的なコカイン探求は,プレリンビック皮質の神経刺激性の低下と関連しています.
- プリリンビック皮質の標的化された in vivo optogenetic 刺激は,強制的な薬物探しの行動を減少させることができます.
- 前頭前野皮質刺激は,薬物乱用を治療する有望な治療戦略です.
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