在小鼠的主要嗅觉球泡中编码社会信号
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
概括
小鼠使用尿液中的挥发性化合物进行沟通. 主嗅球中特定的 mitra 细胞检测到单个化合物,如男性尿液中的 (甲基) 甲乙醇,这是女性吸引力的关键.
科学领域:
- 神经科学是一个神经科学.
- 嗅觉系统 嗅觉系统
- 化学生态化学生态学
背景情况:
- 哺乳动物的尿液含有复杂的挥发性化合物,对于繁殖和识别等社会行为至关重要.
- 主嗅球 (MOB) 处理这些复杂的气味混合物,但具体的神经表征尚未完全理解.
研究的目的:
- 为了研究MOB中的单个额头细胞如何代表小鼠尿液中发现的挥发性化合物.
- 识别特定的气味分子和参与嗅觉处理的相应神经通路.
主要方法:
- 在对小鼠尿液中挥发性化合物的反应中,对单个额头细胞进行了电生理学记录.
- 气相色谱被用于分离尿液挥发物和识别活性化合物.
- 行为测试评估了尿液挥发物对雌性小鼠的吸引力.
主要成果:
- 在两性中,一组额头细胞对尿液中的挥发物有强烈的反应.
- 米特拉细胞被单一的挥发性化合物激活,作为选择性特征检测器.
- 一个特定的甲状腺细胞队列仅对男性尿液作出反应,由 (甲基) 甲乙醇激活.
- (甲基) 甲乙醇是一种新型半化学物质,显著增加了男性尿液对女性的吸引力.
结论:
- mitra 细胞作为选择性特征探测器起作用,通过单个神经元反应代表复杂的自然气味.
- 已识别的半化学物质 (甲基甲乙醇) 在调解小鼠的嗅觉吸引力方面发挥着重要作用.
- 在MOB中,嗅觉处理似乎在很大程度上独立于其他气味成分的存在.
相关概念视频
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...