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不平衡的未折叠蛋白质反应信号有助于1-deoxysphingolipid视网膜毒性
Jessica D Rosarda1, Sarah Giles1,2, Sarah Harkins-Perry1,2
1Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA.
Nature communications
|July 11, 2023
概括
细胞毒性1-脱氧化脂 (1-dSLs) 会导致视网膜细胞损伤. 针对展开的蛋白质反应 (UPR) 途径,特别是激活ATF6,可以减轻这种毒性,为相关的眼睛疾病提供新的治疗途径.
科学领域:
- 细胞生物学 细胞生物学
- 分子眼科分子眼科
- 视网膜疾病机制 视网膜疾病机制
背景情况:
- 非典型的细胞毒性1-deoxysphingolipids (1-dSLs) 与多种视网膜疾病,如糖尿病视网膜病变和2型黄斑长膜病变有关.
- 1-dSL诱导的视网膜细胞毒性的精确分子机制尚未完全理解.
研究的目的:
- 阐明在人类视网膜器官中调节1-dSL毒性的生物途径.
- 为了确定1-dSL相关的视网膜病理的潜在治疗点.
主要方法:
- 在人类视网膜有机体中集散和单核RNA测序的整合.
- 对未折叠蛋白质响应 (UPR) 信号通路的药理学操纵 (PERK,ATF6).
主要成果:
- 1-dSLs在光受体细胞和Müller细胞中的UPR信号臂进行差异激活.
- 持续的PERK信号 (综合应激反应) 和ATF6缺陷有助于1-dSL光受体毒性.
- 药物激活ATF6有效降低1-dSL毒性,而不会影响PERK/ISR信号传递.
结论:
- 在1-dSL诱导的视网膜毒性中,UPR的特定臂在1-dSL诱导的视网膜毒性中发挥着不同的作用.
- 针对UPR的ATF6分支为1-dSL相关的视网膜疾病提供了一个有前途的治疗策略.
- 这项研究揭示了治疗与1-dSL积累相关的疾病的新型干预点.
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