Dnajb11-脏疾病是由于减少多素-1剂量而发展,但未在小鼠中展开蛋白质反应
Sounak Ghosh Roy1, Zhigui Li, Zi Guo
1Section of Nephrology, Department of Internal Medicine, Yale School of Medicine, New Haven, Connecticut.
Journal of the American Society of Nephrology : JASN
|June 19, 2023
概括
DNAJB11脏疾病会影响多素-1 (PC1) 的成熟,导致囊性脏和功能衰竭. 这项研究模拟了这种疾病,揭示了PC1依赖的机制,与典型的自体主导的管间性病 (ADTKD) 截然不同.
科学领域:
- 脏病变的发生因子
- 脏疾病的分子机制.
- 囊性脏疾病的遗传基础
背景情况:
- 异卵性DNAJB11突变会导致成年人性脏和功能衰竭.
- 拟议的致病性涉及自体主导的多囊性病 (ADPKD) 和自体主导的管间性病 (ADTKD) 的重叠.
- DNAJB11,一种Hsp40的合物,对聚素-1 (PC1) 成熟和展开蛋白质反应 (UPR) 途径至关重要.
研究的目的:
- 为了研究DNAJB11突变的体内疾病机制.
- 确定DNAJB11在PC1成熟和UPR激活中的作用.
- 为建立DNAJB11相关病的小鼠模型.
主要方法:
- 产生生殖线和条件Dnajb11淘汰赛小鼠模型.
- 创建Dnajb11-/-细胞系以评估PC1处理.
- 在体外和体内分析PC1裂变,囊发生和UPR激活.
主要成果:
- Dnajb11的损失严重影响PC1的裂变,导致小鼠的剂量依赖性囊形成.
- Dnajb11-/-小鼠的生存能力降低,并出现囊性脏.
- 没有观察到UPR激活或囊独立纤维化的证据,使其与ADTKD区分开来.
结论:
- DNAJB11-病通过PC1依赖途径与ADPKD有机联系.
- 没有UPR表明功能衰竭的替代性,潜在的囊依赖性机制.
- 这项研究为一系列囊性脏疾病的发病过程提供了关键的见解.
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