How COVID-19 may damage the brain and interact with Alzheimer's risk

COVID-19-related blood-brain barrier and microstructural brain injury; Sex differences and synergy with Alzheimer's disease risk

['FUNDING_R01'] · UNIVERSITY OF CALIFORNIA, SAN DIEGO · NIH-11232333

This project looks at whether COVID-19 can harm the brain's protective barrier and worsen Alzheimer's-related changes in older adults, and whether effects differ between men and women.

Quick facts

Phase['FUNDING_R01']
Study typeNih_funding
SexAll
SponsorUNIVERSITY OF CALIFORNIA, SAN DIEGO (nih funded)
Locations1 site (LA JOLLA, UNITED STATES)
Trial IDNIH-11232333 on ClinicalTrials.gov

What this research studies

This work follows older adults with and without prior COVID-19 to look for lasting changes in the brain's blood-brain barrier and microstructure. Researchers will combine brain imaging, biological markers, and genetic risk information (like APOE4) to see how past infection and Alzheimer's-related factors overlap. The team will compare results between men and women to learn whether sex influences risk or recovery. Findings are meant to clarify why some people have lasting cognitive problems after COVID-19 and how that might connect to dementia risk.

Who could benefit from this research

Good fit: Ideal candidates are adults—particularly older adults—who had COVID-19 and are willing to undergo brain imaging and provide blood samples, including people with or at risk for Alzheimer's disease.

Not a fit: People without prior COVID-19 infection or without Alzheimer's risk factors may be less likely to benefit directly from the study's findings.

Why it matters

Potential benefit: If successful, this research could point to biological signs that explain post-COVID cognitive decline and identify targets to prevent or slow dementia in vulnerable people.

How similar studies have performed: Early studies have reported cognitive problems and blood-brain barrier changes after COVID-19, but linking those changes to Alzheimer's risk and sex differences is a newer area with limited conclusive results.

Where this research is happening

LA JOLLA, UNITED STATES

Researchers

About this research

  1. This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
  2. Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
  3. For full project details, budget, and progress reports, visit the official NIH RePORTER page below.

View on NIH RePORTER →

Last reviewed 2026-05-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.