関連する実験動画
Updated: May 12, 2026

06:32
Electrophysiological Recording From Drosophila Labellar Taste Sensilla
Published on: February 27, 2014
ネズミのナトリウム味の細胞と周辺表現
Jayaram Chandrashekar1, Christina Kuhn, Yuki Oka
1Howard Hughes Medical Institute and Department of Neurobiology, University of California at San Diego, La Jolla, California 92093-0649, USA
Nature
|January 29, 2010
まとめ
味覚細胞に表皮ナトリウムチャネル (ENaC) が欠けているマウスは,塩への魅力を失います. この研究では,ENaCが確認されています.
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
- 哺乳類の味覚感は,哺乳類の味覚感である.
背景:
- 哺乳類の塩味は,濃度によって惹かれたり嫌われたりします.
- 魅力的な塩路は,ナトリウム特異性があり,アミロライドに敏感です.
- 皮質ナトリウムチャンネル (ENaC) は,塩の味の検出に関与しています.
研究 の 目的:
- ナトリウム検出のための専用味覚受容体細胞 (TRC) でのENaCの役割を調査する.
- ENaCが塩への行動的魅力を媒介するかどうかを判断する.
主な方法:
- 特にTRCsでエナカルファが欠けているマウスの遺伝子工学.
- 遺伝子組み換えマウスの塩吸引とナトリウム味の反応の行動分析.
- 他の基本的な味の様式に関する確立されたメカニズムとの比較.
主要な成果:
- ENaCを表現する専用TRCは,ナトリウムセンシングの責任者として特定されました.
- TRCでエナカルファが欠けていたマウスは,塩の魅力を完全に失っていた.
- これらのマウスはまた,廃止されたナトリウム味の反応を示した.
結論:
- ENaCは,ナトリウムに対する行動的魅力を媒介するために不可欠です.
- これは,ナトリウム味覚のための専用の細胞基板を検証します.
- 5つの基本的な味覚の質はすべて,独立した細胞メカニズムによって証明されています.
関連する概念動画
The Tongue and Taste Buds
The surface of the tongue is covered with various small bumps called papillae, which either distribute what has been ingested (filiform papillae) or contain the sensory taste (or gustatory) receptor cells (fungiform, circumvallate, and foliate papillae). Embedded within each taste-related papilla are the taste buds—clusters of 30 to 100 gustatory receptor cells.
Gustation
Gustation is a chemical sense that, along with olfaction (smell), contributes to our perception of taste. It starts with the activation of receptors by chemical compounds (tastants) dissolved in the saliva. The saliva and filiform papillae on the tongue distribute the tastants and increase their exposure to the taste receptors.
G-Protein Gated Ion Channels
GPCRs are primarily responsible for our sense of smell, taste, and vision. The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory organs,...
Sensory organs,...
Introduction to Sensory Receptors
Sensory receptors are vital in our ability to perceive and interpret the world. Sensory receptors are specialized cells in the peripheral nervous system that respond to various stimuli and enable one to experience different sensations. Based on specific criteria, sensory receptors are classified into distinct types.
The first classification criterion is based on cell type, position, and function. Some receptor cells are neurons with free nerve endings, where their dendrites are embedded in the...
The first classification criterion is based on cell type, position, and function. Some receptor cells are neurons with free nerve endings, where their dendrites are embedded in the...
Taste Buds and Receptors
Gustation, or the sense of taste, is intrinsically linked to the anatomical structures located on the tongue. This organ's surface, along with the entirety of the oral cavity, is adorned with stratified squamous epithelium. Evident on the tongue are elevated structures known as papillae (singular = papilla), which house the mechanisms for the transduction of gustatory stimuli. Four distinct types of papillae exist, each identified by their unique morphological attributes: the circumvallate,...
The Physiology of Taste
The perception of a salty flavor is facilitated by sodium ions within the oral salivary fluid. Upon consumption of a salty substance, salt crystals disassemble, leading to the liberation of its constituents—Na+ and Cl- ions. These ions subsequently dissolve into the salivary fluid present in the oral cavity. The external environment of the gustatory cells experiences an elevation in Na+ concentration, thereby establishing a potent concentration gradient. This gradient propels the diffusion of...

