小分子介导的向蛋白质降解与疼痛有关的电压通道
bioRxiv : the preprint server for biology
|February 3, 2025
概括
包括PROTACs在内的小分子降解剂可以有效地准像NaV1.8和NaV1.7这样的电压通道 (VGSCs) 进行降解. 这为开发非成性疼痛治疗方法开辟了新的途径.
科学领域:
- 药理学 药理学是指药理学的学科.
- 神经科学是一个神经科学.
- 药用化学 医学化学
背景情况:
- 电压通道 (VGSCs),特别是NaV1.8和NaV1.7,是治疗慢性疼痛的新型非上止痛药的关键标.
- 最近像VX-548这样的NaV1.8抑制剂的成功突显了亚型选择性VGSC调节的治疗潜力.
- 开发超越传统抑制的新治疗策略对于扩大疼痛管理选择至关重要.
研究的目的:
- 通过向蛋白质溶解的嵌合体 (PROTACs) 和分子来消除NaV1.8和NaV1.7.7来研究向蛋白质降解的潜力.
- 评估小分子降解剂在向VGSC中的有效性和机制.
主要方法:
- 开发具有降级标记的NaV1.8和NaV1.7频道.
- 应用小分子降解剂使用E3无素化酶cereblon (CRBN) 和Von Hippel Lindau (VHL) 的应用.
- 液体染色学-质谱学 (LC/MS) 分析以确认无处不在和确定修饰点.
主要成果:
- 标记Degron的NaV被小分子降解剂迅速和强烈地降解.
- PROTACs诱导了NaV1.8和CRBN之间的接近,导致第2个细胞内循环上的无处不在.
- 证明CRBN可以识别VGSCs作为降解的新基质.
结论:
- 电压通道易受通过PROTAC和分子粘剂的向蛋白质降解的影响.
- 这项研究为开发针对NaV的慢性疼痛降解止痛药奠定了基础.
- 这些发现表明了调节VGSC活动的新机制,并为疼痛治疗提供了有希望的策略.
相关概念视频
Voltage-gated Ion Channels
7.9K
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...
7.9K
Mechanically-gated Ion Channels
6.2K
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...
6.2K
Ligand-Gated Ion Channel Receptor: Gating Mechanism
2.1K
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...
2.1K
Non-gated Ion Channels
6.7K
Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
6.7K
Local Anesthetics: Mechanism of Action
2.2K
Local anesthetics (LAs) block sensory and motor impulses by inhibiting the sodium channels on the nerve cell membranes. This induces temporary loss of sensation, relieving pain in a specific body area.
Local anesthetics are amphiphilic molecules consisting of a hydrophobic aromatic part linked to a hydrophilic group by an ester or amide linkage. They are weak bases and are usually available as salts, which increases their solubility and stability. Once administered, LAs exist in the body either...
Local anesthetics are amphiphilic molecules consisting of a hydrophobic aromatic part linked to a hydrophilic group by an ester or amide linkage. They are weak bases and are usually available as salts, which increases their solubility and stability. Once administered, LAs exist in the body either...
2.2K
Ligand-gated Ion Channels
12.1K
Ligand-gated ion channels are transmembrane proteins with a channel for ions to pass through and a binding site for a ligand. The channel opens only when a ligand attaches to the binding site.
Three Subfamilies of Ligand-gated Ion Channels
Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that...
Three Subfamilies of Ligand-gated Ion Channels
Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that...
12.1K


