缺少Dhx36会加速BMSC衰老,并促进与年龄相关的骨质损失
Ji Sun Jang1, Suhan Jung1, Min-Kyoung Song1
1Department of Cell and Developmental Biology, Dental Research Institute, School of Dentistry, Seoul National University, Seoul 03080, Korea.
BMB reports
|November 23, 2025
概括
缺少Dhx36蛋白质会通过增加细胞应激和损害骨髓中介质干细胞 (BMSCs) 的自性加速骨老化. 较低的Dhx36水平有助于与年龄相关的骨质损失,这表明Dhx36是治疗目标.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 老年学是一门学科.
背景情况:
- 介酶干细胞 (BMSC) 衰老有助于与年龄相关的骨疾病,如骨质疏松症.
- 压力颗粒 (SG) 积聚在老化的细胞中,并含有G-四重复 (G4) 结构.
- Dhx36是一种G4解螺旋酶,可能会防止细胞应激和衰老.
研究的目的:
- 调查Dhx36在BMSC衰老和骨质稳定中的作用.
- 确定Dhx36缺乏对SG动态,自和骨质生成分化的影响.
- 评估BMSC特定的Dhx36淘汰对骨结构的体内影响.
主要方法:
- 在体外和体内静止Dhx36的表达.
- 分析BMSC中的SG形成和解决方案.
- 测量自活动和与自相关的基因的表达.
- 评估BMSC衰老和骨质生分化.
- 产生BMSC特定的Dhx36淘汰赛小鼠.
- 使用微CT分析骨微架构.
- 检查公共单细胞RNA测序数据.
主要成果:
- 缺少 Dhx36 增加了 SG 积累,并阻碍了它们在 BMSC 中的解决.
- 丢失 Dhx36 减少了与自相关的基因表达和自活动.
- 缺乏Dhx36的BMSCs表现出增强的衰老和削弱的骨质分化.
- 在老老鼠骨和BMSC中,Dhx36的表达减少.
- 特定于BMSC的Dhx36淘汰赛小鼠表现出骨体积和椎骨数量减少.
- 压力诱导的Dhx36抑制与下调的骨化和分化基因相关.
结论:
- Dhx36是BMSC衰老的关键调节者,将SG动态和自与骨质稳定联系起来.
- 缺少Dhx36会导致骨过早衰老和损失.
- Dhx36代表了预防与年龄相关的骨质损失的潜在治疗标.
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