英国伦敦国王学院Manu Shankar-Hari、Shane M. Tibby等研究人员合作揭示SARS-CoV-2感染相关多系统炎性综合征患儿的外周免疫表型。2020年8月18日，《自然—医学》在线发表了这一成果。

Title: Peripheral immunophenotypes in children with multisystem inflammatory syndrome associated with SARS-CoV-2 infection

Author: Michael J. Carter, Matthew Fish, Aislinn Jennings, Katie J. Doores, Paul Wellman, Jeffrey Seow, Sam Acors, Carl Graham, Emma Timms, Julia Kenny, Stuart Neil, Michael H. Malim, Shane M. Tibby, Manu Shankar-Hari

Issue&Volume: 2020-08-18

Abstract: 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 inflammation2,3,4,5,6,7,8,9,10,11,12,13. We performed peripheral leukocyte phenotyping in 25 children with MIS-C, in the acute (n=23; worst illness within 72h 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 infections14,15, 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 illness1 and appears distinct from Kawasaki disease.

DOI: 10.1038/s41591-020-1054-6

Source: https://www.nature.com/articles/s41591-020-1054-6