Mechanisms underlying COVID-19 induced Neurocognitive Dysfunction

NIH Pandemic-Era Grants

Pandemic Era Grants

2024

Document text

Principal Investigator: PAUL E SCHULZ
Organization: UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON
Fiscal Year: 2024
Award: $639,692
Funding agency: National Institute on Aging

PROJECT SUMMARY/ABSTRACT
Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) infection, which causes Coronavirus Disease
2019 (COVID-19), has become a global health crisis. To date, more than 6.5 million deaths from COVID-19 have
been reported worldwide. Amongst survivors, neurocognitive dysfunction and neuropsychiatric disorders, such
as anxiety and depression, are increasingly recognized and can persist for months, or even years. This enduring
neurocognitive and neuropsychiatric distress obligates us to address critical questions about their duration, risk
factors, and underlying mechanisms. The goal of this project is to test the hypothesis that SARS-CoV-2 promotes
cognitive decline in subjects who were previously normal via stimulating inflammatory pathways, with the
greatest risk being in older adults, females, and those from underrepresented groups. We propose to utilize
patients in our biorepository, who were hospitalized with SARS-CoV-2 infection, to achieve three Specific Aims:
(1) to determine the type and duration of neurocognitive dysfunction present; (2) to ascertain risk factors for
ongoing cognitive decline, including sex, age, race/ethnicity and comorbidities; and, (3) to verify that persistent
neuroinflammation underlies cognitive decline. To achieve these Aims, our team has established a well-curated,
highly diverse biorepository of more than 650 patients hospitalized with COVID-19. About 15% have succumbed
to COVID-related illnesses; however, 37% have continued to return for testing at 3-6 and 12-months post
hospitalization. Preliminary data demonstrates that 30% of subjects returning at one year show progressive
cognitive decline, which is associated with elevated markers of inflammation and neuronal stress. Here we
propose to follow these patients and perform detailed cognitive testing and assess biomarkers from their blood-
serum, spinal fluid, and imaging to explicate the type and time course of cognitive changes present, the risk
factors associated with cognitive dysfunction, and whether inflammation-induced neuronal distress underlies
progressive neurocognitive impairment. This proposal is innovative because we are evaluating the long-term
neurocognitive consequences of severe COVID-19 from a cohort that we have followed since the onset of the
pandemic, which has provided preliminary data supporting our Aims. Moreover, we have brought together
investigators with expertise in cognitive assessment and treatment, and basic and translational research, all in
the setting of a strong institutional infrastructure. Our work is significant because understanding the role of
persistent neuroinflammation in COVID-19-induced cognitive dysfunction will greatly enhance our ability to
rationally test immunosuppressants for this very debilitating disorder.

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