心肌病和衰老完全对展开的蛋白质反应集体通路有所贡献
Camilla Bacchin1, Marco Luciani2, Luca Troncone3
1Department of Medicine, Division of Cardiology Medical University of South Carolina, Charleston, SC, United States of America; Program in Cardio Nephrothoracic Sciences, Department of Medical and Surgical Sciences (DIMEC), University of Bologna, Bologna, Italy.
Journal of molecular and cellular cardiology
|March 12, 2026
概括
蛋白质质量控制 (PQC) 机制,包括未折叠蛋白质响应 (UPR),在异常扩展性心肌病 (iDCM) 中发生变化. 衰老和遗传因素,如 presenilin 突变加剧这些蛋白质折叠缺陷,影响心脏功能.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 心血管研究研究心血管研究
背景情况:
- 蛋白质的合成和组装对于细胞功能至关重要;缺陷可能导致疾病.
- 蛋白质质量控制 (PQC) 网络,包括未折叠的蛋白质反应 (UPR),乌比基蛋白质酶系统 (UPS) 和与ER相关的蛋白质降解 (ERAD),维持蛋白质稳态.
- 错误折叠的蛋白质的积累与异常扩张性心肌病 (iDCM) 有关.
研究的目的:
- 调查iDCM中的UPR和UPS系统的转录和翻译状态.
- 确定衰老和遗传因素对心脏蛋白质质量控制的影响.
主要方法:
- 从iDCM患者和匹配的对照对心肌组织的分析.
- 使用聚合酶连锁反应 (PCR) 进行转录分析.
- 在UPR和UPS组件的翻译分析中采用了Western Blotting (WB).
主要成果:
- 在iDCM患者中证明了三个主要的UPR轴的转录和翻译增加.
- 观察到改变的翻译后修饰 (PTM),切割和拼接UPR组件.
- 确定衰老是影响PQC机制的独立因素,无论是健康的还是患病的个体.
- 发现与阿尔茨海默病相关的 presenilin 基因突变加剧了 UPR 组成部分 PTMs,恶化了蛋白质异常稳定性.
结论:
- UPR异常是心力衰竭的一个重要,未被充分探索的方面.
- 缺陷的蛋白质静止,以错误折叠的蛋白质积累为特征,有助于iDCM中的细胞功能障碍和疲劳.
- 在UPR和UPS路径的组合变化突出显示了蛋白质双相稳定在心力衰竭的发病过程中的关键作用.
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