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Evaluation of the Cognitive Performance of Hypertensive Patients with Silent Cerebrovascular Lesions
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Multifactorial White Matter Damage in the Acute Phase and Pre-Existing Conditions May Drive Cognitive Dysfunction
Ellen Gelpi1,2, Sigrid Klotz1,2, Miriam Beyerle3,4
1Division of Neuropathology and Neurochemistry, Department of Neurology, Medical University of Vienna, 1090 Vienna, Austria.
Viruses
|April 28, 2023
Summary
Postmortem analysis of 32 COVID-19 patients revealed diffuse white matter damage and microglial activation, suggesting indirect brain injury from SARS-CoV-2 infection. Findings indicate multifactorial causes rather than direct viral impact.
Area of Science:
- Neuropathology
- Neuroinflammation
- Infectious Disease
Background:
- Understanding the neurological consequences of COVID-19 is critical.
- Neuropathological studies are essential for elucidating these mechanisms.
Purpose of the Study:
- To perform a detailed postmortem neuropathological analysis of patients deceased from COVID-19.
- To identify patterns of brain damage and inflammation associated with SARS-CoV-2 infection.
Main Methods:
- Analysis of brain tissue from 32 patients who died from COVID-19 between 2020-2021.
- Detailed neuropathological examination including assessment of white matter damage, microglial activation, inflammatory changes, vascular pathologies, and neurodegenerative diseases.
Main Results:
- All cases exhibited diffuse white matter damage and microglial activation.
- Frequent findings included acute vascular pathologies (infarcts, thrombosis, hypoxic-ischemic damage) and pre-existing small vessel diseases.
- Prevalent silent neurodegenerative pathologies were observed, including Alzheimer's disease, tauopathies, Lewy bodies, argyrophilic grain disease, and TDP43 pathology.
Conclusions:
- Results support multifactorial and indirect brain damage in COVID-19, not solely virus-specific.
- Findings align with experimental data on SARS-CoV-2-related white matter damage, microglial activation, and cytokine release.
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