Full Breakdown
Long COVID Linked to Alzheimer's-like Brain Changes
2/10/2026, 11:19:59 PM
Overview of the Study
Recent research conducted by NYU Langone Health has revealed significant structural changes in the choroid plexus (CP) of patients suffering from Long COVID, which may correlate with early indicators of Alzheimer's disease. The study, published in the journal *Alzheimer's & Dementia* on February 10, indicates that patients with Long COVID exhibit a 10% increase in CP size compared to those who have fully recovered from COVID-19. This enlargement is associated with elevated blood markers linked to Alzheimer's progression, such as phosphorylated tau (pTau217) and glial fibrillary acidic protein (GFAP).
Key Findings
The research involved 179 participants, including 86 individuals with neurological symptoms of Long COVID, 67 who had fully recovered, and 26 who had never contracted the virus. Advanced MRI scans revealed that the CP in Long COVID patients not only expanded but also experienced reduced blood flow. This condition may stem from inflammation-driven vascular remodeling, where the blood vessel linings thicken due to prolonged immune activation. Such changes could impair cerebrospinal fluid (CSF) production and waste clearance, potentially compromising the blood-CSF barrier.
Implications for Cognitive Health
Dr. Yulin Ge, the senior study author, emphasized that the observed swelling in the CP could serve as an early warning sign for future cognitive decline resembling Alzheimer's disease. The study also noted that participants with larger CPs performed approximately 2% worse on cognitive assessments compared to their counterparts. The findings suggest that the long-term immune responses following a COVID-19 infection may lead to chronic inflammation and neurodegeneration.
Criticism & Opposition
While the study presents compelling evidence linking Long COVID to changes in brain structure, the mechanisms behind these alterations remain unclear. Critics may argue that further research is necessary to establish causation rather than mere correlation. Dr. Thomas Wisniewski, another senior author, acknowledged the need for larger, longitudinal studies to determine whether the CP changes are a cause or a consequence of neurological symptoms.
Next Steps in Research
The research team plans to follow the participants over time to assess whether the identified brain changes can predict long-term cognitive issues. This ongoing investigation aims to clarify the relationship between CP alterations and neurological symptoms, which could inform future treatment strategies for individuals affected by Long COVID.
Verbatim Quotes
- “Our work suggests that long-term immune reactions caused in some cases after an initial COVID infection may come with swelling that damages a critical brain barrier in the choroid plexus,” — Dr. Yulin Ge, Professor, NYU Grossman School of Medicine
- “A larger, long-term study will be needed to clarify whether these CP alterations are a cause or a consequence of the neurological symptoms, which promises to better focus treatment design efforts.” — Dr. Thomas Wisniewski, Professor, NYU Grossman School of Medicine
This study highlights the potential cognitive implications of Long COVID, underscoring the need for continued research into its long-term effects on brain health.
