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COVID fog demystified
Jennifer Kao1, Paul W Frankland2
1Program in Neurosciences & Mental Health, Hospital for Sick Children, 686 Bay St, Toronto, ON M5G 0A4, Canada; Department of Physiology, University of Toronto, Toronto, ON M5G 1A8, Canada.
Cell
|June 29, 2022
Summary
Mild SARS-CoV-2 infection can cause "COVID fog," a chronic cognitive issue. Research shows glial cell changes and neural circuit problems may underlie long COVID cognitive impairments.
Area of Science:
- Neuroscience
- Immunology
- Infectious Diseases
Background:
- Acute SARS-CoV-2 infection, even when mild, is linked to persistent cognitive deficits, often termed "COVID fog."
- The precise mechanisms driving these long-term cognitive impairments remain incompletely understood.
Purpose of the Study:
- To investigate the role of glial cell dysregulation in the development of cognitive impairments following SARS-CoV-2 infection.
- To explore the connection between glial dysfunction and neural circuit abnormalities in the context of long COVID.
Main Methods:
- Utilizing mouse models of SARS-CoV-2 infection.
- Employing neuroinflammatory markers and behavioral tests to assess cognitive function.
- Analyzing glial cell activation and neural circuit integrity.
Main Results:
- Demonstrated significant glial activation and neuroinflammation in response to SARS-CoV-2 infection.
- Observed alterations in neural circuit function correlating with cognitive deficits.
- Identified a link between glial dysregulation and the manifestation of "COVID fog."
Conclusions:
- Glial cell dysregulation is a key factor contributing to cognitive impairments in long COVID.
- Targeting neuroinflammation and glial responses may offer therapeutic strategies for "COVID fog."
- This study provides mechanistic insights into the neurological sequelae of SARS-CoV-2 infection.
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