COVID-19 Neuropathology: evidence for SARS-CoV-2 invasion of Human Brainstem Nuclei [article]

Aron Emmi, Stefania Rizzo, Luisa Barzon, Michele Sandre, Elisa Carturan, Alessandro Sinigaglia, Silvia Riccetti, Mila della Barbera, Rafael Boscolo-Berto, Patrizia Cocco, Veronica Macchi, Angelo Antonini (+4 others)
2022 bioRxiv   pre-print
AbstractNeurological manifestations are common in COVID-19, the disease caused by SARS-CoV-2. Despite reports of SARS-CoV-2 detection in the brain and cerebrospinal fluid of COVID-19 patients, it's still unclear whether the virus can infect the central nervous system, and which neuropathological alterations can be ascribed to viral tropism, rather than immune-mediated mechanisms.Here, we assess neuropathological alterations in 24 COVID-19 patients and 18 matched controls who died due to
more » ... a / respiratory failure. Aside from a wide spectrum of neuropathological alterations, SARS-CoV-2-immunoreactive neurons were detected in specific brainstem nuclei of 5 COVID-19 subjects. Viral RNA was also detected by real-time RT-PCR. Quantification of reactive microglia revealed an anatomically segregated pattern of inflammation within affected brainstem regions, and was higher when compared to controls. While the results of this study support the neuroinvasive potential of SARS-CoV-2, the role of SARS-CoV-2 neurotropism in COVID-19 and its long-term sequelae require further investigation.
doi:10.1101/2022.06.29.498117 fatcat:e2xgtosyr5bm5ovzjnsuqdmn3a