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Multisystem Inflammatory Syndrome in Children (MIS-C), a Post-viral Myocarditis and Systemic Vasculitis-A Critical

Jeremy C McMurray1, Joseph W May1,2,3, Madeleine W Cunningham4

  • 1Department of Pediatrics, Walter Reed National Military Medical Center (WRNMMC), Bethesda, MD, United States.

Frontiers in Pediatrics
|January 11, 2021
PubMed

Insights

Pediatric multisystem inflammatory syndrome (MIS-C) after COVID-19 involves heart inflammation and vasculopathy. Endothelial injury and IL-1 pathway activation are key, linking MIS-C to Kawasaki disease and rheumatic fever.

Area of Science:

  • Pediatric Cardiology
  • Infectious Diseases
  • Immunology

Background:

  • Multisystem inflammatory syndrome in children (MIS-C) is a serious post-COVID-19 condition.
  • It presents as myocarditis and vasculopathy, primarily affecting pediatric populations.
  • Understanding its immunopathogenesis is crucial for effective management.

Purpose of the Study:

  • To review the diagnosis and severity parameters of MIS-C.
  • To summarize current treatment strategies for MIS-C.
  • To analyze the clinical perspective and compare MIS-C with other pediatric post-infectious inflammatory heart conditions.

Main Methods:

  • Literature review of MIS-C diagnosis, severity, and treatment.
  • Analysis of clinical presentation in relation to immunopathogenesis.
  • Comparative study with Kawasaki disease and Acute Rheumatic Fever.

Main Results:

  • Key diagnostic criteria and severity indicators for MIS-C were identified.
  • Current treatment regimens were summarized, highlighting therapeutic approaches.
  • Endothelial injury and IL-1 pathway activation emerged as significant factors.

Conclusions:

  • MIS-C shares common pathogenic mechanisms with other pediatric inflammatory conditions.
  • Endothelial injury and IL-1 pathway activation are critical determinants in MIS-C, Kawasaki disease, and Acute Rheumatic Fever.
  • Further research into these pathways may inform novel therapeutic targets.

Keywords:
IL-1 (interleukin-1)MIS-Ccoronary artery aneurysmmyocarditisvasculitis

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