SARS-CoV-2 Infects Peripheral and Central Neurons of Mice Before Viremia, Facilitated by Neuropilin-1
Joyce, J. D.; Moore, G. A.; Goswami, P.; Leslie, E. H.; Thompson, C. K.; Bertke, A. S.
Show abstract
Neurological symptoms associated with COVID-19, acute and long-term, suggest SARS-CoV-2 affects both central and peripheral nervous systems. Although studies have shown olfactory and hematogenous entry into the brain and neuroinflammation, little attention has been paid to the susceptibility of the peripheral nervous system to infection or to alternative routes of CNS invasion. We show that neurons in the central and peripheral nervous system are susceptible to productive infection with SARS-CoV-2. Infection of K18-hACE2 mice, wild-type mice, golden Syrian hamsters, and primary neuronal cultures demonstrate viral RNA, protein, and infectious virus in peripheral nervous system neurons and satellite glial cells, spinal cord, and specific brain regions. Moreover, neuropilin-1 facilitates SARS-CoV-2 neuronal infection. Our data show that SARS-CoV-2 rapidly invades and establishes a productive infection in the peripheral and central nervous system via direct invasion of neurons prior to viremia, which may underlie some cognitive and sensory symptoms associated with COVID-19.
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