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Updated: Jul 1, 2025

A Thrombotic Stroke Model Based On Transient Cerebral Hypoxia-ischemia
Published on: August 18, 2015
Stroke in the Time of Circadian Medicine
Philipp Mergenthaler1,2,3,4, Joyce S Balami3,4, Ain A Neuhaus3,5,4
1Center for Stroke Research Berlin (P.M., A.M.B.), Charité - Universitätsmedizin Berlin, Germany.
Insights
Circadian rhythms, the body's internal clock, significantly impact stroke severity and outcomes. Understanding this link is crucial for developing effective stroke and dementia treatments.
Area of Science:
- Chronobiology
- Neurology
- Vascular Biology
Background:
- Time-of-day influences stroke incidence and severity.
- Circadian rhythms affect stroke risk factors and clinical outcomes.
- Growing evidence links circadian biology to cerebrovascular disease.
Purpose of the Study:
- To review the interplay between chronobiology and cerebrovascular disease.
- To explore circadian regulation of stroke and vascular dementia pathophysiology.
- To present clinical evidence on disrupted circadian rhythms and neurological disease.
Main Methods:
- Comprehensive literature review.
- Discussion of circadian control over cellular mechanisms (cell death, metabolism, mitochondrial function, inflammation).
- Analysis of clinical data linking circadian disruption to stroke and dementia.
Main Results:
- Circadian rhythms regulate key pathophysiological processes in stroke and dementia.
- Disrupted circadian rhythms are associated with increased susceptibility to stroke and dementia.
- Specific circadian phases may influence stroke damage and treatment efficacy.
Conclusions:
- Circadian biology is vital for understanding stroke and vascular dementia.
- Chronotype may be a key factor in precision stroke treatment.
- Further research into chronobiology can optimize therapeutic strategies for cerebrovascular diseases.
Abstract:
Time-of-day significantly influences the severity and incidence of stroke. Evidence has emerged not only for circadian governance over stroke risk factors, but also for important determinants of clinical outcome. In this review, we provide a comprehensive overview of the interplay between chronobiology and cerebrovascular disease. We discuss circadian regulation of pathophysiological mechanisms underlying stroke onset or tolerance as well as in vascular dementia. This includes cell death mechanisms, metabolism, mitochondrial function, and inflammation/immunity. Furthermore, we present clinical evidence supporting the link between disrupted circadian rhythms and increased susceptibility to stroke and dementia. We propose that circadian regulation of biochemical and physiological pathways in the brain increase susceptibility to damage after stroke in sleep and attenuate treatment effectiveness during the active phase. This review underscores the importance of considering circadian biology for understanding the pathology and treatment choice for stroke and vascular dementia and speculates that considering a patient's chronotype may be an important factor in developing precision treatment following stroke.
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