慢性压力导致因HPA轴失调和GR核转位障碍而导致时间依赖的骨质损失
Yupeng Yan1, Jiaxin Li1, Zhengmin Lu1
1Institute of Basic Theory for Chinese Medicine, China Academy of Chinese Medical Sciences, Beijing 100700, China.
International journal of molecular sciences
|February 13, 2026
概括
慢性压力会通过破坏下丘脑-垂体-上腺 (HPA) 轴和损害葡萄糖皮质体受体 (GR) 信号,导致骨质疏松症而导致骨质损失. 恢复GR信号可能提供治疗方法.
科学领域:
- 内分泌学 在内分泌学.
- 骨生物学 骨生物学 骨生物学
- 神经科学是一个神经科学.
背景情况:
- 慢性压力和持续的下丘脑-垂体-上腺 (HPA) 轴激活有助于代谢性骨疾病,如骨质疏松症.
- 将压力诱导的HPA轴调节失调与骨质恶化联系在一起的精确分子机制尚未完全理解.
研究的目的:
- 研究慢性压力诱导的HPA轴失调导致骨质损失的分子机制.
- 为了检查葡萄糖皮质体受体 (GR) 在慢性压力期间在大脑和骨组织中信号传递的作用.
主要方法:
- 在雄性大鼠中使用了慢性不可预测的轻度压力 (CUMS) 模型.
- 评估了骨矿物质密度 (BMD),微架构,血清皮质 (CORT),HPA轴功能,促炎细胞因子和GR表达/转位.
- 免疫光和西方斑点分析被用来检查大脑和骨组织中的GR.
主要成果:
- 暴露于CUMS诱导了渐进的,依赖时间的骨质损失,在20周后,骨髓质量和椎质量显著降低.
- 20周的CUMS组显示上腺疲劳和HPA轴反失败.
- 观察到大脑和骨中GR核转位受损,FKBP5增加,炎症性细胞因子升高,骨11β-HSD1上调.
结论:
- 慢性压力会通过HPA轴失调和GR信号受损导致骨质逐渐丧失.
- 通过FKBP5介导的GR转位损伤导致葡萄糖皮质激素耐药性和促炎状态,加速骨质细胞亡.
- 针对HPA-GR轴可能为压力诱导的骨质疏松症提供治疗策略.
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