抗うつ薬の行動効果に対して,ヒポカンプスニューロゲネシスの必要性

Luca Santarelli¹, Michael Saxe, Cornelius Gross

¹Center for Neurobiology and Behavior, Columbia University, New York, NY 10032, USA.

Science (New York, N.Y.)

|August 9, 2003

まとめ

抗うつ剤の治療は,脳細胞の成長をヒポカンプスで促進し,その行動効果にとって重要なプロセスです. このニューロゲネシスを妨害すると,抗うつ剤の反応が阻害され,それが示唆される.

科学分野:

神経科学は神経科学である.
薬理学薬理学とは
細胞生物学細胞生物学

背景:

慢性抗うつ剤療法は,成人における海馬神経生成を高めることが知られている.
抗うつ薬の作用におけるこの増加したニューロゲネシスの正確な機能的意義は十分に理解されていません.

研究の目的:

抗うつ剤に対する行動反応を媒介する抗うつ剤誘発ニューロゲネシスの機能的役割を調査する.
ニューロゲネシスの阻害が抗うつ薬治療の有効性に影響するかどうかを判断する.

主な方法:

遺伝子操作 (セロトニン1A受容体のないマウス) を用いて,神経生成と行動反応を評価した.
ヒポカンプスの神経生成を選択的に妨害するために放射線学的方法 (X放射線) を採用した.
投与されたフルオキセチン (セロトニン再吸収抑制剤) と他の抗うつ薬クラス.

主要な成果:

セロトニン1A受容体を持たないマウスは,フルオキセチンの神経原性または行動的効果を示さなかった.
ヒッポキャンプスの局所的なX放射線は,複数の抗うつ剤のクラスの神経原性および行動的効果を廃止しました.
抗うつ薬によるヒポカンパニューロゲネシスの障害は,これらの薬に対する行動的反応を損なう.

結論:

ヒッポキャンパスの神経生成は,慢性抗うつ薬治療の行動効果に不可欠です.
ヒポカンプスの神経生成の刺激は,抗うつ薬の作用の基礎となる重要なメカニズムである可能性があります.

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