通过CysLT1受体对抗剂激活TMEM175 lysosomal离子通道
Kangjun Li1, Vaishali Satpute Janve2, Samantha D Le1
1Department of Pharmacology, Vanderbilt University, Nashville, TN 37232.
American journal of physiology. Cell physiology
|February 11, 2026
概括
这项研究确定了TMEM175 (跨膜蛋白175) 的新激活剂,这是一种与帕金森病相关的通道. 发现Zafirlukast是一种中等强度的TMEM175激活剂,提供潜在的治疗途径.
科学领域:
- 离子通道生物学 离子通道生物学
- 神经科学是一个神经科学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 跨膜蛋白175 (TMEM175) 是一种由AKT激活的通道,调节溶酶体电压和pH.
- TMEM175中的功能丧失变体是帕金森病 (PD) 的遗传风险因素.
- 小分子TMEM175激活剂代表了PD的潜在治疗策略.
研究的目的:
- 为了选FDA批准的药物用于TMEM175增强剂.
- 通过已识别的化合物来表征TMEM175的激活.
- 研究 TMEM175 激活背后的分子机制.
主要方法:
- 使用HEK-293细胞过度表达TMEM175.5的960种FDA批准药物的高通量选.
- 光和自动补丁测试来评估TMEM175的激活.
- 地点定向突变发生和计算建模,以确定药物相互作用的地点.
主要成果:
- 确定了71个TMEM175激活剂,包括CysLT1R抗剂pranlukast和montelukast.
- 已建立的等级级强度:DCPIB ~ zafirlukast > montelukast >> pranlukast.
- 突变性研究显示了关键激活门区域,涉及T119和H449.
结论:
- 扎菲尔卢卡斯特是一种中度强大的TMEM175激活剂,添加到已知的化合物中.
- 确定了TMEM175中一个关键区域,该区域参与小分子的激活门.
- 这些发现支持TMEM175激活剂作为帕金森病的潜在治疗方法.
相关概念视频
Ion Channels
91.5K
The movement of ions like sodium, potassium, and calcium into and out of the cell is essential to maintain the electrochemical gradient in living cells. The ion channels—a class of membrane transport proteins—help maintain this ionic gradient for the smooth functioning of physiological activities such as maintaining cell size and volume, conducting nerve impulses, and gas and nutrient exchange.
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
Ion channels are specialized integral membrane proteins on the plasma membrane that allow...
91.5K
Ligand-Gated Ion Channel Receptor: Gating Mechanism
4.1K
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...
4.1K
Non-gated Ion Channels
8.3K
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....
8.3K
Drug-Receptor Interaction: Antagonist
5.1K
An antagonist is a drug that binds strongly to a receptor without activating it. An antagonist prevents other molecules, such as neurotransmitters or hormones, from binding to the receptor and triggering a cellular response. Such interaction effectively hinders the normal physiological processes mediated by the receptor, resulting in various pharmacological effects depending on the specific receptor targeted.
Antagonists can be classified as competitive or noncompetitive based on their...
Antagonists can be classified as competitive or noncompetitive based on their...
5.1K
Mechanically-gated Ion Channels
7.8K
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...
7.8K
G-Protein Gated Ion Channels
5.8K
GPCRs are primarily responsible for our sense of smell, taste, and vision. The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory...
Sensory...
5.8K


