IRE1α通过调节依赖progranulin的XBP1拼接和原平衡来预防骨关节炎
Li Liang1, Fengmei Zhang1,2, Naibo Feng1
1Laboratory of Developmental Biology, Department of Cell Biology and Genetics, School of Basic Medical Sciences, Chongqing Medical University, 400016, Chongqing, China.
Experimental & molecular medicine
|November 1, 2023
概括
需要内醇的酶1α/X盒结合蛋白-1拼接 (IRE1α/XBP1s) 途径对于在骨关节炎 (OA) 中保持软骨稳定性至关重要. 它的缺乏加速了OA的进展,突出了IRE1α/ERN1作为关节疾病的潜在治疗点.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 病理学 病理学 病理学
背景情况:
- 骨关节炎 (OA) 是一种退行性关节疾病,影响生活质量.
- 细胞内膜网膜 (ER) 的压力与OA的发病有关.
- IRE1α/XBP1s通路在OA冠状细胞中的作用尚未完全理解.
研究的目的:
- 研究IRE1α/ERN1在骨关节炎的发展和进展中的作用.
- 阐明IRE1α/ERN1影响软骨恒温的潜在分子机制.
主要方法:
- 在患有特定冠状细胞ERN1缺陷的小鼠中使用了手术诱导性关节炎模型 (ACLT).
- 对AdERN1进行局部输送,以评估其治疗潜力.
- 研究了前列腺素 (PGRN),IRE1α和XBP1拼接之间的相互作用.
- 分析了原II表达和原恒温.
主要成果:
- 冠状细胞特异性的ERN1缺乏导致了自发的关节炎样性软骨破坏,并加速了关节炎的进展.
- 在OA模型中,AdERN1的局部输送可以防止软骨降解.
- 进子素 (PGRN) 结合IRE1α,促进XBP1与XBP1s的拼接.
- XBP1s通过TNF-α/ERK1/2信号保护软骨,并调节II型原体的表达.
- 缺少ERN1会减少PGRN和XBP1s,降低原II和破坏平衡.
结论:
- IRE1α/ERN1通路依赖于PGRN和XBP1s拼接,在OA中具有冠状动脉保护作用.
- 由于损害了原平衡,ERN1缺乏会使OA恶化.
- IRE1α/ERN1代表了骨关节炎和其他退行性关节疾病的有前途的治疗标.
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