In a groundbreaking study conducted by researchers at the University of Illinois Chicago, the intricate mechanisms underlying COVID-19-related cognitive impairments, commonly known as “brain fog,” have been unraveled.
Spearheaded by Sarah Lutz, Assistant Professor of Anatomy and Cell Biology in the College of Medicine, the study represents a significant step forward in understanding the neurological consequences of SARS-CoV-2 infection and exploring potential therapeutic avenues. The findings of this pioneering research are published in the journal Brain.
The focal point of the investigation was the blood-brain barrier, a crucial protective mechanism that safeguards the brain from harmful substances circulating in the bloodstream. The team discovered that mice infected with SARS-CoV-2 exhibited compromised blood-brain barrier integrity, resulting in neurological symptoms such as memory loss and difficulty learning.
Delving deeper into the molecular underpinnings of these neurological manifestations, the researchers identified a notable decrease in the Wnt/beta-catenin signaling pathway in the brains of infected mice. This pathway, known for its role in maintaining blood-brain barrier health and shielding the brain from damage, emerged as a key player in COVID-19-related cognitive impairments.
In a pivotal experiment, the researchers employed gene therapy to stimulate the Wnt/beta-catenin pathway in infected mice. The results were nothing short of remarkable: the treated mice exhibited reduced blood-brain barrier leakage, diminished immune cell infiltration into the brain, and marked improvements in learning and memory.
Dr. Lutz underscored the significance of focusing on older mice with mild infections, mirroring the demographic and severity profile of most COVID-19 cases in vaccinated humans. Despite the preliminary nature of the findings, the study represents a crucial milestone in unraveling the complexities of post-infection cognitive impairments and offers promising prospects for therapeutic interventions.
Dr. Jalees Rehman, the Benjamin Goldberg Professor and head of the UIC Department of Biochemistry and Molecular Genetics, stressed the importance of studying the impact of respiratory infections on the brain. He emphasized the potential for targeted therapies based on molecular signals activated during infection and subsequent inflammation.
The collaborative efforts of the research team, comprising Troy Trevino, Avital Fogel, Guliz Otkiran, Seshadri Niladhuri, Mark Sanborn, Jacob Class, Ali Almousawi, and Justin Richner, highlight the interdisciplinary approach taken to unravel the complexities of COVID-19-related neurological complications.
