マウスの主要な嗅覚球に社会的信号をコードする
Da Yu Lin1, Shao-Zhong Zhang, Eric Block
1HHMI and Department of Neurobiology, Box 3209, Duke University Medical Center, Durham, North Carolina 27710, USA. dayulin@neuro.duke.edu
Nature
|February 23, 2005
まとめ
ネズミは,尿の揮発性化合物をコミュニケーションのために使用します. 主な嗅覚球内の特定のミトラ細胞は,男性の尿中の (メチルチオ) メタネチオールのような単一の化合物を検出し,これは女性の魅力の鍵です.
科学分野:
- 神経科学は神経科学である.
- 嗅覚系は嗅覚システムです.
- 化学エコロジー 化学エコロジー
背景:
- 哺乳類の尿には,繁殖や認識などの社会的行動に不可欠な複雑な揮発性化合物が含まれています.
- 主な嗅覚球 (MOB) は,これらの複雑な匂い混合物を処理しますが,特定の神経表現は完全に理解されていません.
研究 の 目的:
- MOBの個々のミトラ細胞が,マウスの尿に含まれる揮発性化合物をどのように表すかを調査する.
- 特定の臭い分子を特定し,嗅覚処理に関与する関連する神経経路を特定する.
主な方法:
- 電子生理学的記録は,マウス尿の揮発性化合物に対する反応として,個々のミトラ細胞に実施されました.
- ガスクロマトグラフィーは,尿の揮発性物質を分割し,活性化化合物を特定するために使用されました.
- 行動分析は,尿の揮発性物質がメスマウスへの魅力性を評価した.
主要な成果:
- 両性において,ミトラ細胞のサブセットが,尿の揮発性物質に強烈に反応した.
- ミトラ細胞は単一の揮発性化合物によって活性化され,選択的な特徴検出器として作用した.
- ミトラ細胞の特定のコホートは, (メチルチオ) メタネチオールによって活性化された男性尿にのみ反応した.
- (メチルチオ) メタネチオールという新しいセミオケミカルが,男性の尿が女性にとって魅力的であることを大幅に高めました.
結論:
- ミトラ細胞は,選択的な特徴検知器として機能し,個々のニューロン反応を通して複雑な自然な臭いを表します.
- 特定された半化学物質 (メチルチオメタネチオール) は,マウスの嗅覚吸引を媒介する重要な役割を果たしています.
- MOBにおける嗅覚処理は,他の匂いの成分の存在から大きく独立しているようです.
関連する概念動画
01:30Bacterial Signaling
Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...
01:03Communication
Communication between two animals occurs when one animal transmits an information signal that causes a change in the animal that receives the information. Organisms communicate with one another in a host of different ways. Signals can be auditory, chemical, visual, tactile, or a combination of these. Communication is a critical behavioral adaptation that promotes survival, growth, and reproduction.
02:33Hedgehog Signaling Pathway
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
01:32Types of Signaling Molecules
In multicellular organisms, many molecules transmit signals between cells to pass information. These signals vary in complexity and include small peptides, nucleotides, steroids, fatty acid derivatives, and dissolved gases such as nitric oxide. Some signaling molecules diffuse through the plasma membrane to act locally between neighboring cells or travel long distances. Others remain attached to the cell surface, transmitting information to other cells only when they make contact. In some...
02:33Hedgehog Signaling Pathway
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
01:32Types of Signaling Molecules
In multicellular organisms, many molecules transmit signals between cells to pass information. These signals vary in complexity and include small peptides, nucleotides, steroids, fatty acid derivatives, and dissolved gases such as nitric oxide. Some signaling molecules diffuse through the plasma membrane to act locally between neighboring cells or travel long distances. Others remain attached to the cell surface, transmitting information to other cells only when they make contact. In some...