Blood-brain barrier disruption and microglial activation during hypoxia and post-hypoxic recovery in aged mice.
Abstract
Hypoxia triggers blood-brain barrier disruption and a strong microglial activation response around leaky cerebral blood vessels. These events are greatly amplified in aged mice which is translationally relevant because aged patients are far more likely to suffer hypoxic events from heart or lung disease, and because of the pathogenic role of blood-brain barrier breakdown in vascular dementia. Importantly, it is currently unclear if disrupted cerebral blood vessels spontaneously repair and if they do, whether surrounding microglia deactivates. In this study, we addressed these questions by exposing aged (20 months old) mice to chronic mild hypoxia (8% O
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Research summary
The paper investigates the effects of hypoxia on blood-brain barrier disruption and microglial activation in aged mice, which is relevant to understanding age-related changes in the brain and potential mechanisms underlying vascular dementia. However, while it addresses important questions regarding the aging process and its implications for brain health, the findings appear to be more descriptive and focused on the pathology rather than providing solutions to the root causes of aging or lifespan extension. Thus, the impact is solid but limited.
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