氧化通过P2Y6纯感受体刺激调节UDP引起的细胞突变物
Talita Correa1, Gioconda E D D Moura1, Helena B Nader1
1Department of Biochemistry, Molecular Biology Division, Federal University of São Paulo (UNIFESP/EPM), Rua Três de Maio, 100, São Paulo, SP, CEP 09210-580, Brazil.
Scientific reports
|November 20, 2025
概括
细胞中糖氨基甘油 (GAG) 缺乏会导致过多的氧化 (NO) 和氧化应激. 这会扰乱信号传递,阻断细胞内膜网的功能,并导致细胞死亡,突出GAG.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 生理学 生理学 生理学
背景情况:
- 葡萄糖氨基甘氨酸 (GAG) 和蛋白质甘氨酸是影响生物过程的细胞外矩阵的重要组成部分.
- GAG调节内皮氧化合成酶 (eNOS) 和氧化 (NO) 生产,这对血管功能至关重要.
- 缺乏GAG的细胞表现出改变的NO水平,影响细胞信号传递.
研究的目的:
- 为了研究GAG缺乏细胞中NO过度产生的对细胞质Ca2+过渡体的影响.
- 检查UDP对P2Y6受体的激活如何影响GAG缺席的Ca2+信号传递.
- 了解GAG在纯能信号传递和细胞应激反应中的作用.
主要方法:
- 野生类型 (CHO-K1) 和GAG缺乏 (CHO-745) 细胞的比较.
- 在用UDP激活P2Y6受体时测量细胞质Ca2+过渡体.
- 氧化和化应激标志物的评估.
- 对内质网膜 (ER) Ca2+储存和储存 Ca2+输入的分析.
- 对Na+/Ca2+交换器 (NCX) 活性和RGD效应的评估.
主要成果:
- 缺乏GAG的细胞表现出基本氧化和化应激.
- P2Y6R激活涉及脂酶C和ER Ca2+储存器,这些过程取决于表面的GAG.
- 在GAG缺乏细胞中NO的过度产生会破坏Ca2+稳态,ER功能,并促进亡.
- RGD在野生类型但不是GAG缺乏细胞中增加了NO,这表明GAG调解了这种效应.
结论:
- GAG 缺乏导致显著的细胞功能障碍,包括氧化应激,破坏的 Ca2+ 信号传递和 ER 应激.
- 表面GAG对于适当的纯能受体介导的Ca2+信号传递至关重要.
- 由于GAG缺乏导致的过量NO有助于细胞死亡,强调GAG在血管生理中的保护作用.
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