関連する実験動画
Updated: May 5, 2026

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Taste Preference Assay for Adult Drosophila
Published on: September 8, 2016
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哺乳類の味覚受容体の新しいファミリー
E Adler1, M A Hoon, K L Mueller
1National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland 20892, USA.
Cell
|April 13, 2000
まとめ
科学者たちは,味覚に関与する哺乳類のGタンパク質結合受容体 (T2Rs) を発見した. 味覚細胞で発現するこれらの受容体は,複数の苦い味を認識するメカニズムを示唆しています.
科学分野:
- 神経科学は神経科学である.
- 遺伝学 遺伝学とは
- 分子生物学は分子生物学である.
背景:
- 味覚は哺乳類にとって極めて重要で,舌と天口からの感覚の入力を含みます.
- Gタンパク質結合受容体 (GPCR) は,感覚信号伝達において重要な役割を果たします.
研究 の 目的:
- 哺乳類の味覚に関与する新しい受容体を特定し,特徴づけること.
- 苦い味のシグナル伝達におけるこれらの受容体の役割を調査する.
主な方法:
- 人間とネズミのゲノムにおけるGタンパク質結合受容体 (T2Rs) の新しいファミリーの特定.
- T2R遺伝子の組織と,苦い知覚の場所との遺伝的関連性の分析.
- 味覚受容体細胞におけるT2R発現の検討と,味覚受容体細胞との共局所化.
- ガストドゥチンに対するT2R結合と苦い味に対する反応を評価するためのインビトロ機能性アッセイ.
主要な成果:
- 味覚受容体細胞のサブセットで発現する40〜80の新型T2Rの発見.
- T2Rsはゲノムに集約され,苦い知覚の遺伝子に関連しています.
- 個々の味覚受容体細胞は複数のT2Rを発現し,幅広い味覚認識を示している.
- T2Rはガストドゥシンを含む細胞にのみ存在し,ガストドゥシン結合受容体として機能する.
結論:
- 哺乳類における味覚受容体候補として,新しいT2Rsファミリーが特定されました.
- これらのT2Rは,苦い味の知覚を媒介することに関与している可能性が高い.
- 表現パターンは,複数の苦い化合物を認識する役割を示唆しています.
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