Peripheral immunophenotypes in children with multisystem inflammatory syndrome associated with SARS-CoV-2 infection
NATURE MEDICINE(2020)
摘要
Recent reports highlight a new clinical syndrome in children related to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) 1 —multisystem inflammatory syndrome in children (MIS-C)—which comprises multiorgan dysfunction and systemic inflammation 2 – 13 . We performed peripheral leukocyte phenotyping in 25 children with MIS-C, in the acute ( n = 23; worst illness within 72 h of admission), resolution ( n = 14; clinical improvement) and convalescent ( n = 10; first outpatient visit) phases of the illness and used samples from seven age-matched healthy controls for comparisons. Among the MIS-C cohort, 17 (68%) children were SARS-CoV-2 seropositive, suggesting previous SARS-CoV-2 infections 14 , 15 , and these children had more severe disease. In the acute phase of MIS-C, we observed high levels of interleukin-1β (IL-1β), IL-6, IL-8, IL-10, IL-17, interferon-γ and differential T and B cell subset lymphopenia. High CD64 expression on neutrophils and monocytes, and high HLA-DR expression on γδ and CD4 + CCR7 + T cells in the acute phase, suggested that these immune cell populations were activated. Antigen-presenting cells had low HLA-DR and CD86 expression, potentially indicative of impaired antigen presentation. These features normalized over the resolution and convalescence phases. Overall, MIS-C presents as an immunopathogenic illness 1 and appears distinct from Kawasaki disease.
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关键词
Cytokines,Inflammation,Inflammatory diseases,Paediatrics,Viral infection,Biomedicine,general,Cancer Research,Metabolic Diseases,Infectious Diseases,Molecular Medicine,Neurosciences
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