Journal
NEUROSCIENTIST
Volume 28, Issue 6, Pages 552-571Publisher
SAGE PUBLICATIONS INC
DOI: 10.1177/1073858420984106
Keywords
pandemic; viral infection; SARS; inflammation; autoantibodies; neurodegeneration; angiotensin; stroke; COVID-19; ARDS; encephalitis
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Funding
- National Council for Scientific Research in Lebanon (CNRS-L)
- American University of Beirut (AUB)
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SARS-CoV-2 infects cells through the ACE2 receptor and can affect the central nervous system, leading to symptoms such as dizziness, altered consciousness, and encephalitis. The virus may enter the brain tissue through various pathways, and the COVID-19 pandemic can exacerbate stress, depression, and anxiety in infected individuals and high-risk populations.
SARS-CoV-2 infects cells through angiotensin-converting enzyme 2 (ACE2), a ubiquitous receptor that interacts with the virus' surface S glycoprotein. Recent reports show that the virus affects the central nervous system (CNS) with symptoms and complications that include dizziness, altered consciousness, encephalitis, and even stroke. These can immerge as indirect immune effects due to increased cytokine production or via direct viral entry into brain tissue. The latter is possible through neuronal access via the olfactory bulb, hematogenous access through immune cells or directly across the blood-brain barrier (BBB), and through the brain's circumventricular organs characterized by their extensive and highly permeable capillaries. Last, the COVID-19 pandemic increases stress, depression, and anxiety within infected individuals, those in isolation, and high-risk populations like children, the elderly, and health workers. This review surveys the recent updates of CNS manifestations post SARS-CoV-2 infection along with possible mechanisms that lead to them.
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