与GRP94的ATM相互作用调节瘤受体表达和信号以及微质激活
Paige E Burrell1, Donald E Fleenor1, Olivia M Nicholson1
1Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC 27710.
概括
过敏性脑膜炎 (A-T) 研究揭示了ATM蛋白在DNA修复之外的新作用. ATM 调节 GRP94,影响细胞信号和微质激活,提供潜在的 A-T 治疗点.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
背景情况:
- 过敏性脑膜炎 (A-T) 是一种由ATM基因突变引起的遗传性疾病,导致神经退行和癌症等多种症状.
- ATM蛋白主要以其在DNA损伤反应中的作用而闻名.
- ATM中的功能障碍表明了DNA修复之外的潜在非正规功能.
研究的目的:
- 为了确定新的ATM交互器和基板.
- 为了研究ATM在DNA损伤信号之外的细胞过程中的作用.
- 探索AT和相关疾病的潜在治疗点.
主要方法:
- 蛋白质与蛋白质相互作用研究以确定ATM相互作用器.
- 生物化学测试以确定ATM对GRP94糖化和激活的影响.
- 基于细胞的测试以评估受体氨酸激酶 (RTK) 表面表达和信号.
- 评估微质激活标志物的实验 (细胞因子的产生,细胞化).
主要成果:
- GRP94是HSP90的类似物,被确定为ATM交互器和基板.
- ATM 调节GRP94 N-糖化,激活和转移到等离子体膜的过程.
- ATM损失/抑制增加了细胞表面RTK和通路过度激活,这被GRP94抑制逆转.
- ATM/GRP94通路调节微质激活,ATM损失增加炎症反应,通过抑制GRP94可逆.
结论:
- ATM在调节GRP94活动和随后的细胞表面蛋白质稳定方面发挥着关键作用.
- 在DNA损伤反应之外,ATM具有重要的功能,影响RTK信号和神经炎症.
- 向细胞表面GRP94可能为AT表型和其他神经退行性/炎症性疾病提供治疗策略.
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