Favourable antibody responses to human coronaviruses in children and adolescents with autoimmune rheumatic diseases
Deakin, C.; Cornish, G.; Ng, K.; Faulkner, N.; Bolland, W.; Panova, V.; Hope, J.; Rosa, A.; Harvey, R.; Hussain, S.; Earl, C.; Jebson, B.; Wilkinson, M.; Marshall, L.; O'Brien, K.; Rosser, L.; Radziszewska, A.; Peckham, H.; Heaney, J.; Rickman, H.; Paraskevopoulou, S.; Houlihan, C.; Spyer, M.; Gamblin, S.; Mccauley, J.; Nastouli, E.; Cherepanov, P.; Ciurtin, C.; Wedderburn, L.; Kassiotis, G.
Show abstract
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.
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