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New Methods to Study Gustatory Coding
Published on: June 29, 2017
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味の質のニューラル表現は,周辺にある
Robert P J Barretto1, Sarah Gillis-Smith1, Jayaram Chandrashekar2
1Howard Hughes Medical Institute and Departments of Biochemistry and Molecular Biophysics and of Neuroscience, Columbia College of Physicians and Surgeons, Columbia University, New York 10032, USA.
Nature
|November 11, 2014
まとめ
哺乳類の特化した味覚受容体細胞 (TRC) は,味覚情報を脳に伝達する. この研究は,特定の神経経路と,舌から中枢神経系の神経細胞への正確な味覚情報の転送を明らかにしています.
科学分野:
- 神経科学は神経科学である.
- 感覚生物学 感覚生物学について
- グスターション・リサーチ
背景:
- 哺乳類の味覚は,甘さ,酸さ,苦さ,塩分,ウマミの5つの基本的な味を含んでいます.
- 舌の味覚受容体細胞 (TRC) は,特定の味覚を検知する.
- 味覚情報を伝達する神経経路の理解は,味覚系の研究において極めて重要です.
研究 の 目的:
- 味覚受容体細胞 (TRCs) が,より高い神経センターに味覚情報を伝達する方法を調査する.
- 味覚系の初期ニューラルステーションのニューロンのチューニング特性を調べる.
- 味の特異性をマッピングするために,外周神経系から中枢神経系への味覚情報の転送.
主な方法:
- ニューロンに遺伝的にコードされたカルシウム指標を発現するトランスジェニックマウスを生成した.
- グラデーション屈折指数マイクロエンドスコーピーと2フォトン顕微鏡を用いた.
- 脳の底部のギャングリオンニューロンからの味覚反応をイメージした.
主要な成果:
- ギャングリオンニューロンの味覚の好みに細かい選択性を示した.
- 舌のTRCと主要な神経アファレントとの強い一致が確認されました.
- 味覚細胞と中枢神経系との間で特異的な味覚情報伝達が行われる.
結論:
- 味覚情報は,周辺の味覚受容体細胞から中央神経細胞に高特異性で伝達されます.
- 味覚系は,味覚のための精密で専用の神経構造を示しています.
- この研究は,哺乳類の味覚のニューラルコーディングに関する洞察を提供します.
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