急性心理压力对无血细胞线粒体DNA (cf-mtDNA) 的影响:一个交叉实验研究
medRxiv : the preprint server for health sciences
|April 29, 2025
概括
心理压力会增加焦虑和皮质醇,但不是无细胞线粒体DNA (cf-mtDNA) 或IL-6,这表明这些生物标志物反映了实验室程序,而不是压力本身.
科学领域:
- 心理神经免疫学 心理神经免疫学
- 压力生理学 压力生理学
- 生物标志物研究 生物标志物研究
背景情况:
- 急性心理压力可以提升循环的无细胞线粒体DNA (cf-mtDNA) 和促炎性细胞因子.
- 之前的研究缺乏休息控制来区分压力影响和实验室程序.
研究的目的:
- 研究社会评估性压力因素对cf-mtDNA,细胞因子和神经内分泌反应的独立影响.
- 为了区分压力诱导的生物标志物变化与非特定的实验室效应.
主要方法:
- 一个交叉实验试验,72名志愿者接受5分钟的社会评估压力或休息控制条件.
- 血液样本在10个时间点收集,以测量皮质醇,甲醇胺,IL-6,IL-10,TNF-ɑ,以及血/血清cf-mtDNA.
- 具有至少一个月的访问间隔的平衡设计.
主要成果:
- 压力因素显著增加了焦虑,心率,血压,皮质醇和上腺素.
- 在压力和对照条件下,介质素-6 (IL-6) 和血cf-mtDNA的增加,表明非特异性反应.
- 血cf-mtDNA表现出双相反应,无论条件如何,都观察到显著增加.
结论:
- 社会评估压力有选择性地影响情绪,心血管和神经内分泌系统.
- IL-6和血cf-mtDNA的增加似乎是对实验室协议的非特异性反应,而不是压力本身.
- 促炎性细胞因子和cf-mtDNA是独立调节的,在这种情况下可能不是可靠的压力特异性生物标志物.
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