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酸是PIEZO2通道和机械灵敏度的内源性负调节剂
Matthew Gabrielle1, Yevgen Yudin1, Yujue Wang2,3
1Department of Pharmacology, Physiology & Neuroscience, Rutgers University New Jersey Medical School, Newark, NJ, USA.
研究人员确定了脂质调节剂,酸和 lysophosphatidic 酸 (LPA),可以选择性地抑制机械敏感的 PIEZO2 通道. 脂酶D (PLD) 途径控制PIEZO2的活动,影响触摸和疼痛.
科学领域:
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
- 生物化学 生物化学
背景情况:
- 机械敏感的PIEZO2离子通道对于触摸,自身感知和炎症性疼痛至关重要.
- 目前没有针对PIEZO2而不是PIEZO1的选择性小分子抑制剂.
- 已经证明TMEM120A蛋白可以抑制PIEZO2而不影响PIEZO1.
研究的目的:
- 为了确定选择性抑制PIEZO2通道的脂质调节剂.
- 调查脂酶D (PLD) 途径在PIEZO2调节中的作用.
主要方法:
- 研究了TMEM120A表达对细胞脂质水平的影响.
- 将酸 (PA),酸 (LPA) 和碳循环酸 (ccPA) 应用于细胞中.
- 使用光遗传学来激活脂酶D (PLD).
- 在小鼠身上进行行为实验,以评估机械灵敏度.
主要成果:
- TMEM120A表达增加了细胞PA和LPA水平.
- 细胞内PA和LPA抑制了PIEZO2,但没有抑制PIEZO1活动.
- 细胞外的ccPA也抑制了PIEZO2.2.
- 在小鼠中,PLD激活抑制了PIEZO2,而PLD抑制增加了PIEZO2活性和机械灵敏度.
结论:
- 酸和 lysophosphatidic 酸可以选择性地抑制 PIEZO2 通道.
- 确定PLD途径是PIEZO2活动的关键调节者.
- 这些发现为涉及PIEZO2介导疼痛和感觉的疾病提供了潜在的治疗点.
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