まとめ
成熟した海馬の神経細胞は低酸素とシアン化物に対して脆弱であり,細胞死につながる. マグネシウム治療は細胞死を予防し,シナプス活性が低酸素神経損傷を媒介することを示唆しています.
科学分野:
- 神経科学は神経科学である.
- 細胞生物学 細胞生物学
- 神経生理学 神経生理学とは
背景:
- 低酸素とシアン化物の曝露は,神経細胞死を引き起こす可能性があります.
- これらの侮辱に対する神経細胞の脆弱性は,その発達段階に依存する可能性があります.
- シナプス活動は,成熟したニューロンの重要な機能である.
研究 の 目的:
- 異なる分化段階におけるヒポキャンパスの培養ニューロンに対する低酸素とシアン酸の影響を調査する.
- 低酸素状態中の神経損傷を媒介するシナプス活動の役割を決定する.
主な方法:
- 培養された海馬の神経細胞は,シアン化物や無毒大気にさらされた.
- 早期および成熟した分化段階のニューロンをテストした.
- マグネシウム治療はシナプス活動を抑制するために使用されました.
主要な成果:
- 初期段階の分化ニューロンは,シアン化物や無酸素による目に見える効果を示さなかった.
- 成熟したニューロンは,シアン化物や無酸素にさらされたときに死亡しました.
- マグネシウム治療は,低酸素状態下で成熟したニューロンの細胞死を予防しました.
結論:
- 成熟した海馬の神経細胞は,低酸素とシアン化物による損傷に敏感です.
- シナプス活動は,低酸素ニューロンにおける細胞死を媒介する上で重要な役割を果たします.
- シナプス活性をターゲットにすることで,低酸素性損傷に対する神経保護戦略を提供することができます.
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.
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...
01:29Excitatory and Inhibitory Effects of Neurotransmitters
When an action potential reaches the presynaptic axon terminal, it releases neurotransmitters from the neuron into the synaptic cleft at a chemical synapse. The released neurotransmitter can be excitatory or inhibitory. The critical criteria commonly used to determine whether a molecule is a neurotransmitter at a chemical synapse are the molecule's presence in the presynaptic neuron. Second, its release is in response to strong presynaptic depolarization. And lastly, the presence of specific...
01:30Overview of Cell Death
Cell death is an essential process where the body gets rid of old or damaged cells. Cell proliferation and death need to be balanced, as an imbalance between the two may lead to cancer or autoimmune diseases.
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
Cell death was observed in the early 19th century, but there was no experimental evidence to prove it. In 1842, Carl Vogt first discovered cell death in a metamorphic toad; however, it was not termed ‘cell death.’ Scientists discovered different cell death pathways only in the 20th century...
01:26Chemical Synapses
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
01:26Chemical Synapses
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...