Neurocognitive Aging Following Acute Illness: Pathobiology And A Framework For Developing Neurotherapeutic Agents
Have you ever wondered why some people experience a decline in their thinking abilities after a severe illness or injury? It turns out that acute illnesses, like a serious infection or trauma, can significantly impact how our brains age. Researchers have been exploring the underlying reasons for this phenomenon, often referred to as accelerated neurocognitive aging.
One key finding is that these acute health crises can trigger a cascade of harmful processes in the brain. This includes “neuroinflammation,” which is essentially inflammation within the brain, and damage to the tiny blood vessels that supply the brain with oxygen and nutrients. The protective barrier between the bloodstream and the brain, known as the “blood-brain barrier,” can also become compromised. Additionally, specialized immune cells in the brain, called “microglia,” can become overactive, and cells can enter a state of “senescence,” where they stop dividing and can release harmful substances.
These events collectively disrupt the brain’s normal functioning and its ability to repair itself. They contribute to a state of chronic, low-grade inflammation throughout the body, sometimes called “inflammaging,” which further accelerates the aging process in the brain. Understanding these intricate mechanisms is crucial because it opens doors for developing new treatments. By targeting these inflammatory and immune responses, reducing the number of senescent cells, and protecting the blood-brain barrier, scientists hope to develop therapies that can help maintain brain health and resilience even after a severe illness.
Source: link to paper