神経学的および免疫学的シナプス関係
Michael L Dustin1, David R Colman
1Program in Molecular Pathogenesis, Skirball Institute of Biomolecular Medicine, Department of Pathology, New York University School of Medicine, New York, NY 10016 USA. dustin@saturn.med.nyu.edu
Science (New York, N.Y.)
|October 26, 2002
まとめ
シナプスは,神経系と免疫系における分泌物による情報伝達を可能にする細胞の接点です. 彼らの構造は,分泌と粘着領域のための活性ゾーンを含み,表面分子の調節機能があります.
科学分野:
- 細胞生物学 細胞生物学
- 神経科学は神経科学である.
- 免疫学 免疫学とは
背景:
- シナプスは,細胞間のコミュニケーションに不可欠な特殊な細胞の接合点です.
- 神経系と免疫系の両方が,シナプスを使って,指示された信号を送信します.
- シナプス構造には,分泌のための活性ゾーンと,それを囲む粘着領域が特徴です.
研究 の 目的:
- シナプスの基本的な構造と機能を記述する.
- 神経系と免疫系におけるシナプスの役割を強調する.
- 表面分子がシナプス機能に及ぼす影響について議論する.
主な方法:
- シナプス構造と機能に関する既存の文献のレビュー.
- シナプスマイクロドメイン内の分子構成要素の分析.
- 異なる細胞タイプにおけるシナプス機構の比較研究.
主要な成果:
- シナプスは,制御された分泌を通して情報伝達を促進します.
- マイクロドメインの構造には,中央の活性ゾーンと周辺の粘着ドメインが含まれています.
- 表面分子は,シナプス活動の調節に不可欠です.
結論:
- シナプスは,異なる生物系にまたがるシグナル伝達プラットフォームである.
- シナプスの構造的組織が,その機能的特異性の根底にある.
- シナプス機能の調節は,ダイナミックな分子相互作用によって達成されます.
関連する概念動画
01:12Synaptic Signaling
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
02:47The Synapse
Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
01:09Synaptic Signaling
Neurons communicate at synapses, or junctions, to excite or inhibit the activity of other neurons or target cells, such as muscles. Synapses may be chemical or electrical.
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
Most synapses are chemical, meaning an electrical impulse or action potential spurs the release of chemical messengers called neurotransmitters. The neuron sending the signal is called the presynaptic neuron, and the neuron receiving the signal is the postsynaptic neuron.
The presynaptic neuron fires an action potential that...
01:25Overview of Synapses
A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...
01:28Integration of Synaptic Events
Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
01:28Neuronal Communication
Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...