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Cleveland Clinic-Led Study Shows Covid-19 Leads to Brain Changes & Alzheimer’s-Like Dementia

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PurpleSkyz

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Cleveland Clinic-Led Study Shows Covid-19 Leads to Brain Changes & Alzheimer’s-Like Dementia 3d0aae6a96a95197

Cleveland Clinic-Led Study Shows Covid-19 Leads to Brain Changes & Alzheimer’s-Like Dementia
June 14, 2021


A new Cleveland Clinic-led study has identified mechanisms by which COVID-19 can lead to Alzheimer’s disease-like dementia. The findings, published in Alzheimer’s Research & Therapy, indicate an overlap between COVID-19 and brain changes common in Alzheimer’s, and may help inform risk management and therapeutic strategies for COVID-19-associated cognitive impairment.
Reports of neurological complications in COVID-19 patients and “long-hauler” patients whose symptoms persist after the infection clears are becoming more common, suggesting that SARS-CoV-2 (the virus that causes COVID-19) may have lasting effects on brain function. However, it is not yet well understood how the virus leads to neurological issues.
Feixiong Cheng, Ph.D., assistant staff in Cleveland Clinic’s Genomic Medicine Institute and lead author on the study says:
“While some studies suggest that SARS-CoV-2 infects brain cells directly, others found no evidence of the virus in the brain. Identifying how COVID-19 and neurological problems are linked will be critical for developing effective preventive and therapeutic strategies to address the surge in neurocognitive impairments that we expect to see in the near future.”
In the study, the researchers harnessed artificial intelligence using existing datasets of patients with Alzheimer’s and COVID-19. They measured the proximity between SARS-CoV-2 host genes/proteins and those associated with several neurological diseases where closer proximity suggests related or shared disease pathways. The researchers also analyzed the genetic factors that enabled SARS-COV-2 to infect brain tissues and cells.
While researchers found little evidence that the virus targets the brain directly, they discovered close network relationships between the virus and genes/proteins associated with several neurological diseases, most notably Alzheimer’s, pointing to pathways by which COVID-19 could lead to Alzheimer’s disease-like dementia. To explore this further, they investigated potential associations between COVID-19 and neuroinflammation and brain microvascular injury, which are both hallmarks of Alzheimer’s. Dr. Cheng explained:
“We discovered that SARS-CoV-2 infection significantly altered Alzheimer’s markers implicated in brain inflammation and that certain viral entry factors are highly expressed in cells in the blood-brain barrier. These findings indicate that the virus may impact several genes or pathways involved in neuroinflammation and brain microvascular injury, which could lead to Alzehimer’s disease-like cognitive impairment.
“Ultimately, we hope to have paved the way for research that leads to testable and measurable biomarkers that can identify patients at the highest risk for neurological complications with COVID-19.”
The researchers also found that individuals with the allele APOE E4/E4, the greatest genetic risk factor for Alzheimer’s, had decreased expression of antiviral defense genes, which could make these patients more susceptible to COVID-19.
Dr. Cheng and his team are now working to identify actionable biomarkers and new therapeutic targets for COVID-19-associated neurological issues in COVID long-haulers using cutting-edge network medicine and artificial intelligence technologies.
Yadi Zhou, Ph.D.; Jielin Xu, Ph.D., and Yuan Hou, Ph.D., are co-first authors on the study. The study was supported by the National Institute on Aging, the National Heart, Lung, and Blood Institute, the National Institute of Neurological Disorders and Stroke, and Cleveland Clinic’s VeloSano Pilot Program.
Cleveland Clinic

Headline Image: Feixiong Cheng, Ph.D. via Cleveland Clinic

https://bendedreality.com/cleveland-clinic-led-study-shows-covid-19-leads-to-brain-changes-alzheimers-like-dementia/


Thanks to: https://bendedreality.com



  

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