Immunoserologic Detection and Diagnostic Relevance of Cross-Reactive Autoantibodies in Coronavirus Disease 2019 Patients.

Schiaffino, María Teresa; Di Natale, Marisa; García-Martínez, Elena; Navarro, Joaquín; Muñoz-Blanco, José Luis; Demelo-Rodríguez, Pablo; Sánchez-Mateos, Paloma · J Infect Dis · 2020

case_control · Level III

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Abstract

During the coronavirus disease 2019 (COVID-19) pandemic, we detected a new immunofluorescence (IF) pattern in serum autoantibody (autoAb) screening of laboratory-confirmed COVID-19 patients. The IF pattern was composed of liver and gastric mucosa staining on rat kidney/liver/stomach sections. We describe 12 patients positive for the cross-reactive antibody, compared with a negative group of 43 hospitalized COVID-19 patients, finding association with either neurologic or thrombotic complications. In sequential pre- and post-COVID-19 serum samples, we confirmed autoAb seroconversion. Our data indicate that autoAb screening in COVID-19 patients may be easily performed by IF and alert for autoreactive-mediated complications such as thrombotic or neurologic events.

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