Systemic inflammation and microbial translocation are characteristic features of SARS-CoV2 related Multi-system Inflammatory Syndrome in Children
Abstract Background Multisystem Inflammatory Syndrome in children (MIS-C) is a rare manifestation of SARS-CoV2 infection in children that can result in increased morbidity and mortality. The inflammatory underpinnings of MIS-C have not been examined in detail. Methods We examined the plasma levels of acute phase proteins and microbial translocation markers in MIS-C, acute COVID-19 infection (COVID-19), SARS-CoV-2 seropositive and control children. Findings MIS-C children exhibited significantly higher levels of C-reactive protein (CRP), alpha2 macroglobulin (a2M), Serum Amyloid P (SAP), lipopolysaccharide (LPS), sCD14 and LPS binding protein (LBP) and significantly lower levels of haptoglobin (Hp) in comparison to seropositive, control and/or COVID-19 children. In addition, COVID-19 children exhibited significantly higher levels of most of the above markers in comparison to seropositive and control children. PCA analysis using a set of these markers could clearly discriminate MIS-C and COVID-19 from seropositive and control children. MIS-C children requiring PICU admission and COVID-19 children with severe disease had higher levels of CRP, SAP and/or sCD14 at admission. Conclusion Our study describes the role of systemic inflammation and microbial translocation markers in children with MIS-C and COVID-19 and therefore helps in advancing our understanding of the pathogenesis of different presentations of SARS-CoV-2 infection in children.