静脈内P-クロロフェニララニンによるセロトニンの減少に伴う過食症と肥満

S T Breisch, F P Zemlan, B G Hoebel

Science (New York, N.Y.)

|April 23, 1976

まとめ

P-クロロフェニララニンを投与したネズミの脳セロトニンの減少は,過食と体重増加を大きく引き起こした. これは,セロトニンが食事の行動と体重を調節する上で重要な役割を果たしていることを示唆しています.

科学分野:

神経科学は神経科学である.
行動内分泌学行動内分泌学
薬理学薬理学とは

背景:

セロトニンは,様々な生理学的および行動的プロセスに関与する神経伝達物質です.
以前の研究では,神経伝達物質のレベルと食欲の調節との関連が示唆されていた.

研究の目的:

セロトニン減少と過食 (過食) とその後の体重増加との因果関係を調査する.
選択的なセロトニン減少が食事行動に影響するかどうかを判断する.

主な方法:

ネズミは脳内のセロトニンを枯渇させるため,p-クロロフェニララニン (PCPA) を静脈内投与した.
食事の行動,体重,神経伝達物質のレベル (セロトニン,ノレアピネフリン,ドーパミン) を時間とともにモニタリングした.
投与量-反応と持続時間-効果の関係を調べました.

主要な成果:

p-クロロフェニララニンの静脈内注射は,3日以内に,主に昼間,顕著な過食を引き起こしました.
注射後1~2週間の過食と併せて体重増加が観察されました.
観察された効果は用量に依存し,セロトニン減少の程度と持続時間と相関していました.
ノルエピネフリンとドーパミンのレベルは,治療によってほとんど影響を受けませんでした.

結論:

P-クロロフェニララニン誘発のセロトニン減少は,ネズミの餌食行動を抑制する.
この研究は,セロトニンが餌を積極的に抑制するという仮説を裏付けている.
低頭部損傷や栄養不良などの手段によるセロトニンの選択的減少は,過食や肥満につながる可能性があります.

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