RT Journal Article SR Electronic T1 Favourable antibody responses to human coronaviruses in children and adolescents with autoimmune rheumatic diseases JF bioRxiv FD Cold Spring Harbor Laboratory SP 2021.02.15.431291 DO 10.1101/2021.02.15.431291 A1 Claire T. Deakin A1 Georgina H. Cornish A1 Kevin W. Ng A1 Nikhil Faulkner A1 William Bolland A1 Veera Panova A1 Joshua Hope A1 Annachiara Rosa A1 Ruth Harvey A1 Saira Hussain A1 Christopher Earl A1 Bethany R. Jebson A1 Meredyth G.Ll. Wilkinson A1 Lucy R. Marshall A1 Kathryn O’Brien A1 Elizabeth C. Rosser A1 Anna Radziszewska A1 Hannah Peckham A1 Judith Heaney A1 Hannah Rickman A1 Stavroula Paraskevopoulou A1 Catherine F. Houlihan A1 Moira J. Spyer A1 Steve J. Gamblin A1 John McCauley A1 Eleni Nastouli A1 Peter Cherepanov A1 Coziana Ciurtin A1 Lucy R. Wedderburn A1 George Kassiotis YR 2021 UL http://biorxiv.org/content/early/2021/02/16/2021.02.15.431291.abstract AB Differences in humoral immunity to coronaviruses, including severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), between children and adults remain unexplained and the impact of underlying immune dysfunction or suppression unknown. Here, we examined the antibody immune competence of children and adolescents with prevalent inflammatory rheumatic diseases, juvenile idiopathic arthritis (JIA), juvenile dermatomyositis (JDM) and juvenile systemic lupus erythematosus (JSLE), against the seasonal human coronavirus (HCoV)-OC43 that frequently infects this age group. Despite immune dysfunction and immunosuppressive treatment, JIA, JDM and JSLE patients mounted comparable or stronger responses than healthier peers, dominated by IgG antibodies to HCoV-OC43 spike, and harboured IgG antibodies that cross-reacted with SARS-CoV-2 spike. In contrast, responses to HCoV-OC43 and SARS-CoV-2 nucleoproteins exhibited delayed age-dependent class-switching and were not elevated in JIA, JDM and JSLE patients, arguing against increased exposure. Consequently, autoimmune rheumatic diseases and their treatment were associated with a favourable ratio of spike to nucleoprotein antibodies.Competing Interest StatementThe authors have declared no competing interest.