线粒体DNA完整性下降和晚年抑郁症炎症标志物升高:一项纵向研究
Ana Paula Mendes-Silva1,2,3, Perla El-Ahmad4, Ana Paula Costa5
1Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.
Biological psychiatry global open science
|October 10, 2025
概括
晚年抑郁症与不稳定的无细胞线粒体DNA (ccf-mtDNA) 有关. 这种不稳定与症状严重程度相关,并预测未来的炎症,这表明线粒体功能障碍在LLD中发挥了作用.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
- 免疫学 免疫学 免疫学
背景情况:
- 晚年抑郁症 (LLD) 是一个重要的心理健康问题,其生物学基础不清楚.
- 线粒体功能障碍越来越多地受到影响,可能导致反应性氧物种增加和循环的无细胞线粒体DNA (ccf-mtDNA).
- ccf-mtDNA完整性的特定影响,例如删除,对LLD病原性仍然不太了解.
研究的目的:
- 调查ccf-mtDNA不稳定性 (水平和删除) 与LLD之间的关联.
- 探索ccf-mtDNA变异,抑郁症状严重程度和老年人的医学并发症之间的关系.
- 检查ccf-mtDNA不稳定性对炎症标记物的纵向影响.
主要方法:
- 量化ccf-mtDNA水平和线粒体基因MT-ND2和MT-ND4中的删除率,来自90名个体的血样本 (50名LLD,40名健康对照[HCs]).
- 使用多重免疫测试评估了血中白蛋白 (IL-1β,IL-5,IL-6).
- 对一小部分参与者 (13名LLD,13名HC) 进行了为期30个月的随访.
主要成果:
- LLD与ccf-mtDNA不稳定性增加显著相关,包括更高的删除率和基线水平.
- 增加的ccf-mtDNA不稳定性与更严重的抑郁症状和更高的医疗并发症负担相关.
- 较高的基线ccf-mtDNA删除率预测在30个月随访时IL-5和IL-6水平升高.
结论:
- 线粒体不稳定,由ccf-mtDNA变化表明,可能会导致情绪失调和医疗负担在LLD.
- 这些发现突出了线粒体功能障碍,炎症和LLD之间的潜在联系.
- 需要进一步的研究来证实这些结果,并澄清连接线粒体不稳定性和LLD炎症的潜在机制.
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