関連する実験動画
Updated: Jul 16, 2026
10:57
Chicken Embryo Spinal Cord Slice Culture Protocol
Published on: March 25, 2013
運動ニューロン由来レチノイドシグナリングは,脊髄運動ニューロンのサブタイプ同一性を指定します
1Howard Hughes Medical Institute, Department of Biochemistry and Molecular Biophysics, Columbia University, New York, New York 10032, USA.
Cell
|September 4, 1998
まとめ
早期に生まれた脊髄運動ニューロンは,脊椎動物の中枢神経系における後期に生まれたニューロンの生成とアイデンティティに影響を与えるレチノイド信号を放出します. この研究は,ニューロン発達の新しいメカニズムと細胞運命の仕様を明らかにしています.
科学分野:
- 神経科学は神経科学である.
- 発達生物学 発達生物学について
- 細胞生物学 細胞生物学
背景:
- 脊椎動物におけるニューロン細胞タイプの多様化は,組織センターからの誘導信号に依存しています.
- 後期の神経発達に影響を与えるために,ポストミトーシスニューロンからの信号の役割は十分に理解されていません.
研究 の 目的:
- 早期に生まれた脊髄運動ニューロンが,後期に生まれたニューロンの発達に及ぼす影響を調査する.
- 初期のニューロンからの信号が,その後のニューロン集団の運命を指定できるかどうかを判断する.
主な方法:
- 脊髄の発達を研究するために脊椎動物モデルシステムを活用した.
- レチノイド信号伝達経路の効果を分析した.
- 異なる発達段階におけるモーターニューロンの生成とアイデンティティを調査した.
主要な成果:
- 早期に生まれた運動ニューロンのサブセットからのレチノイド媒介の信号が特定されました.
- この信号は,異なる軸レベルで生成されたモーターニューロンの数の変動を引き起こしました.
- 信号はまた,モーターニューロンの後に生まれたサブセットのアイデンティティを指定しました.
結論:
- 早期に生まれたニューロンは,遅れて生まれたニューロンの発達に影響を与える信号を提供します.
- 初期のモーターニューロンからのレチノイド信号は,モーターニューロン多様化において重要な役割を果たします.
- このメカニズムは,脊椎動物の中央神経系で観察される異なる神経細胞の運命に寄与する.
さらに関連する動画
08:24Zebrafish In Situ Spinal Cord Preparation for Electrophysiological Recordings from Spinal Sensory and Motor Neurons
Published on: April 18, 2017
07:33Conversion of Human Induced Pluripotent Stem Cells (iPSCs) into Functional Spinal and Cranial Motor Neurons Using PiggyBac Vectors
Published on: May 1, 2019
関連する概念動画
01:32The Retina
The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
00:46Motor Units
A motor unit consists of two main components: a single efferent motor neuron (i.e., a neuron that carries impulses away from the central nervous system) and all of the muscle fibers it innervates. The motor neuron may innervate multiple muscle fibers, which are single cells, but only one motor neuron innervates a single muscle fiber.
01:13Motor Units
The motor unit is a fundamental component of the neuromuscular system and plays a crucial role in coordinating muscle contractions. It consists of a somatic motor neuron, which connects and controls multiple skeletal muscle fibers, forming a single functional segment. The axon of the motor neuron branches out and establishes synaptic connections known as neuromuscular junctions with individual muscle fibers within the motor unit.
Motor units come in different sizes, with smaller units...
Motor units come in different sizes, with smaller units...
01:19Nervous Tissue: Neuron Types
Neurons, the fundamental units of the nervous system, can be classified based on both their structural and functional characteristics.
Structurally, neurons are categorized into three main types: multipolar, bipolar, and unipolar (or pseudounipolar). Multipolar neurons, which are the most common type in the brain and spinal cord, as well as all motor neurons, possess multiple dendrites and a single axon.
Bipolar neurons, on the other hand, have one primary dendrite and one axon. They are...
Structurally, neurons are categorized into three main types: multipolar, bipolar, and unipolar (or pseudounipolar). Multipolar neurons, which are the most common type in the brain and spinal cord, as well as all motor neurons, possess multiple dendrites and a single axon.
Bipolar neurons, on the other hand, have one primary dendrite and one axon. They are...
01:10Spinal Cord: Information Processing
The spinal cord is an integral hub for motor and sensory information that enables the brain to communicate with the peripheral nervous system (PNS). This communication consists of relaying sensory data and transmission of motor commands.
Sensory Information Processing
Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...
Sensory Information Processing
Sensory information processing begins at the sensory receptors located in the skin and other tissues, which detect somatic sensory stimuli such as touch, temperature, or pain. These receptors function as catalysts, initiating...
01:22Somatic Spinal Reflexes
Somatic spinal reflexes are rapid, involuntary muscular responses to external stimuli that involve the somatic musculature and the spinal cord.
One of the most well-known somatic spinal reflexes is the stretch reflex, which is activated by the sudden stretching of a muscle. This reflex involves the activation of specialized sensory receptors called muscle spindles, which are located in the muscle tissue and detect changes in the length and speed of muscle contractions. When a muscle is suddenly...
One of the most well-known somatic spinal reflexes is the stretch reflex, which is activated by the sudden stretching of a muscle. This reflex involves the activation of specialized sensory receptors called muscle spindles, which are located in the muscle tissue and detect changes in the length and speed of muscle contractions. When a muscle is suddenly...