电压通道在缺血/再输血中的作用和行为
Yusuf Anil Ay1, Emir Enis Yurdgulu1, Yasin Bayir1
1Department of Biochemistry, Faculty of Pharmacy, Ataturk University, 25240 Erzurum, Türkiye.
Cellular signalling
|September 4, 2025
概括
电压通道 (VGCC) 是缺血/反 (I/R) 损伤的关键参与者. 阻断特定的VGCC显示有望防止由I/R损伤引起的器官损伤.
科学领域:
- 心血管生物学 心血管生物学
- 神经科学是一个神经科学.
- 脏生理学 脏生理学
- 生殖医学 生殖医学
背景情况:
- 缺血/反 (I/R) 损伤涉及复杂的机制,包括不平衡,氧化应激和炎症.
- 电压通道 (VGCC) 调节的流入,对I/R损伤的发病产生产生关键影响.
- 在反过程中,功能障碍的运输和活性氧物种 (ROS) 会加剧细胞内过载.
研究的目的:
- 综合审查VGCCs的结构亚型和生理功能.
- 在多个器官系统的I / R条件下调查VGCC行为.
- 评估对VGCCs的药理封锁策略,以防止I/R损伤.
主要方法:
- 详细探索VGCC结构亚型和生理作用.
- 在I / R期间,广泛调查心血管,神经,和生殖系统中的VGCC.
- 对VGCC抑制剂 (例如,尼莫迪平,米贝弗拉迪尔,SNX-111) 的实验研究进行了批判性评估.
主要成果:
- VGCC,特别是L,T,N和R型,在I/R损伤中表现出不同的作用.
- 对VGCC的药理封锁在实验I/R模型中显示出保护作用.
- 目前正在探索特定于组织和异形的向策略,以提高有效性.
结论:
- VGCC是减轻I/R损伤的有希望的分子标.
- 未来的疗法需要针对异构体的特定向,优化给药时间和器官导向的输送.
- 目前的VGCC抑制剂的转化限制需要解决临床应用.
相关概念视频
The Role of Ion Channels in Neuronal Computation
3.3K
A postsynaptic neuron usually receives numerous impulses from several other presynaptic neurons. The axon hillock of the postsynaptic neuron integrates all these signals and determines the likelihood of firing an action potential.
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
Sometimes a single EPSP is strong enough to induce an action potential in the postsynaptic neuron. However, multiple presynaptic inputs must often create EPSPs around the same time for the postsynaptic neuron to be sufficiently depolarized to fire an action potential....
3.3K
Voltage-gated Ion Channels
8.6K
Voltage-gated ion channels are transmembrane proteins that open and close in response to changes in the membrane potential. They are present on the membranes of all electrically excitable cells such as neurons, heart, and muscle cells.
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
Generally, all voltage-gated ion channels have a 'voltage-sensing domain' that spans the lipid bilayer. The charged residues in the sensor move in response to the membrane potential changes that open the channel allowing ions movement. There are several...
8.6K
Ligand-Gated Ion Channel Receptor: Gating Mechanism
2.6K
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
2.6K
Antihypertensive Drugs: Action of Calcium Channel Blockers
761
Calcium ions are essential to contract smooth muscle cells in blood vessels. They enter these cells through voltage-dependent calcium channels, specifically L-type calcium channels in the cell membrane. These L-type calcium channels are integral to the excitation-contraction coupling process in smooth muscle. When a stimulus is received by smooth muscle cells, their membrane depolarizes. This alteration in membrane potential instigates the opening of L-type calcium channels. As a result,...
761
Mechanically-gated Ion Channels
6.7K
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
6.7K
Feedback Regulation of Calcium Concentration
3.5K
Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
3.5K


