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渇きを誘発し,脳内の異なる神経集団によって暗号化された信号を抑制する
Yuki Oka1, Mingyu Ye1, Charles S Zuker1
11] Department of Biochemistry and Molecular Biophysics, Columbia College of Physicians and Surgeons, Howard Hughes Medical Institute, Columbia University, New York, New York 10032, USA [2] Department of Neuroscience, Columbia College of Physicians and Surgeons, Howard Hughes Medical Institute, Columbia University, New York, New York 10032, USA.
Nature
|January 28, 2015
まとめ
科学者たちは,脳の2つの異なるニューロングループを発見しました.
科学分野:
- 神経科学は神経科学である.
- 生理学 生理学とは
- 行動生物学 行動生物学
背景:
- 渇きは基本的な生存本能である.
- 以前の研究によると,喉の渇き時に下垂体ニューロンが活性化することが示されていた.
- 喉下臓器が渇きを調節する役割は十分に理解されていない.
研究 の 目的:
- 喉の渇きを制御するサブフォリニカル臓器内の特定のニューラル集団を特定し,特徴づけること.
- これらのニューロンが飲酒行動を誘発または抑制するメカニズムを解明する.
主な方法:
- オプトジェネティクスを利用して,サブフォリニカル臓器の神経活動を操作しました.
- 特定の分子マーカーによって特定されたニューロン集団:刺激性ニューロンに対するETV-1,抑制性ニューロンに対するVGAT.
- 標的神経活性化に対する反応として観察された飲酒行動.
主要な成果:
- ETV-1発現ニューロンの活性化により,飽和した動物でも激しい飲酒が誘発された.
- VGATを発現するニューロンの活性化により,渇いた動物でも飲酒行動を抑制しました.
- 特定の神経細胞活動と渇き調節の間の直接的な因果関係を示した.
結論:
- サブフォリニカル臓器の2つの異なるニューロン集団を特定し,渇きに対する"オン"と"オフ"のスイッチとして機能します.
- これらの発見は,哺乳類の脳内の渇き制御のための専用の神経回路を明らかにしています.
- 渇きに関連した障害を理解し,潜在的に治療するための基礎を提供します.
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