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Environmental Circadian Disruption Increases Stroke Severity and Dysregulates Immune Response.
Journal of Biological Rhythms ( IF 2.9 ) Pub Date : 2020-06-08 , DOI: 10.1177/0748730420929450
Anne M Ramsey 1 , Adam Stowie 1 , Oscar Castanon-Cervantes 1 , Alec J Davidson 1
Affiliation  

Understanding the health consequences of chronic disruption of circadian rhythms can contribute to improving prevention strategies for shift workers. Chronic circadian disruption in shift work has been linked to a higher risk of stroke. Dysregulated immune responses are also linked to circadian disruption and may be a factor in stroke outcomes in shift workers. In this study, we test the hypotheses that specific schedules of circadian disruption exacerbate inflammatory responses in the brain, causing an increase in infarct size after experimentally induced ischemic stroke. Mice were exposed to 1 of 5 different lighting schedules followed by a 30-min middle cerebral artery occlusion, then reperfusion and 3-day recovery. A history of weekly phase advances resulted in an increased infarct volume versus the control lighting schedule. These effects were shift-direction specific, nonpermanent, and required multiple shifts to occur. In a separate cohort, stereotaxic injections of lipopolysaccharide were given bilaterally after exposure to 1 of 3 different lighting schedules. Ratios of pro- to anti-inflammatory cytokine expression show dysregulated responses after a history of phase advances. We conclude that chronic circadian disruption leads to worsened stroke outcome in a direction- and schedule-specific manner likely because of priming of the inflammatory response in the brain. These pieces of evidence suggest that the health impacts of shift work may be improved by targeting shift work scheduling, inflammatory mediators, or both.



中文翻译:

环境昼夜节律紊乱增加中风严重程度并失调免疫反应。

了解慢性昼夜节律紊乱对健康的影响有助于改进轮班工人的预防策略。轮班工作中的慢性昼夜节律紊乱与更高的中风风险有关。失调的免疫反应也与昼夜节律紊乱有关,并且可能是轮班工人中风结果的一个因素。在这项研究中,我们检验了以下假设,即特定的昼夜节律紊乱会加剧大脑中的炎症反应,导致实验性缺血性卒中后梗死面积增加。将小鼠暴露于 5 种不同光照方案中的 1 种,然后进行 30 分钟大脑中动脉闭塞,然后再灌注和 3 天恢复。与控制照明时间表相比,每周阶段进展的历史导致梗塞体积增加。这些影响是特定于换档方向的、非永久性的,并且需要发生多次换档。在一个单独的队列中,在暴露于 3 种不同照明方案中的 1 种后,双侧给予立体定向注射脂多糖。在阶段进展的历史之后,促炎细胞因子与抗炎细胞因子表达的比率显示反应失调。我们得出结论,慢性昼夜节律紊乱导致中风结果以特定方向和时间表的方式恶化,这可能是由于大脑中炎症反应的启动。这些证据表明,轮班工作对健康的影响可以通过针对轮班工作安排、炎症介质或两者兼而有之来改善。在暴露于 3 种不同照明方案中的 1 种后,双侧给予脂多糖立体定向注射。在阶段进展的历史之后,促炎细胞因子与抗炎细胞因子表达的比率显示反应失调。我们得出结论,慢性昼夜节律紊乱导致中风结果以特定方向和时间表的方式恶化,这可能是由于大脑中炎症反应的启动。这些证据表明,轮班工作对健康的影响可以通过针对轮班工作安排、炎症介质或两者兼而有之来改善。在暴露于 3 种不同照明方案中的 1 种后,双侧给予脂多糖立体定向注射。在阶段进展的历史之后,促炎细胞因子与抗炎细胞因子表达的比率显示反应失调。我们得出结论,慢性昼夜节律紊乱导致中风结果以特定方向和时间表的方式恶化,这可能是由于大脑中炎症反应的启动。这些证据表明,轮班工作对健康的影响可以通过针对轮班工作安排、炎症介质或两者兼而有之来改善。我们得出结论,慢性昼夜节律紊乱导致中风结果以特定方向和时间表的方式恶化,这可能是由于大脑中炎症反应的启动。这些证据表明,轮班工作对健康的影响可以通过针对轮班工作安排、炎症介质或两者兼而有之来改善。我们得出结论,慢性昼夜节律紊乱导致中风结果以特定方向和时间表的方式恶化,这可能是由于大脑中炎症反应的启动。这些证据表明,轮班工作对健康的影响可以通过针对轮班工作安排、炎症介质或两者兼而有之来改善。

更新日期:2020-06-08
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