en
Scientific article
Open access
English

Robust innate responses to SARS-CoV-2 in children resolve faster than in adults without compromising adaptive immunity

Published inCell reports, vol. 37, no. 1, 109773
Publication date2021-10-05
First online date2021-09-15
Abstract

SARS-CoV-2 infection in children is less severe than it is in adults. We perform a longitudinal analysis of the early innate responses in children and adults with mild infection within household clusters. Children display fewer symptoms than adults do, despite similar initial viral load, and mount a robust anti-viral immune signature typical of the SARS-CoV-2 infection and characterized by early interferon gene responses; increases in cytokines, such as CXCL10 and GM-CSF; and changes in blood cell numbers. When compared with adults, the antiviral response resolves faster (within a week of symptoms), monocytes and dendritic cells are more transiently activated, and genes associated with B cell activation appear earlier in children. Nonetheless, these differences do not have major effects on the quality of SARS-CoV-2-specific antibody responses. Our findings reveal that better early control of inflammation as observed in children may be key for rapidly controlling infection and limiting the disease course.

eng
Keywords
  • B cells
  • COVID-19
  • SARS-CoV-2
  • Antibodies
  • Children
  • Gene profile
  • Innate responses
  • Interferon
  • Monocytes
  • Resolution
  • Adaptive Immunity
  • Adolescent
  • Adult
  • Antibodies, Viral / immunology
  • B-Lymphocytes / metabolism
  • COVID-19 / genetics
  • COVID-19 / immunology
  • COVID-19 / virology
  • Chemokine CXCL10 / metabolism
  • Child
  • Child, Preschool
  • Cytokines / metabolism
  • Granulocyte-Macrophage Colony-Stimulating Factor / metabolism
  • Humans
  • Immunity, Innate
  • Infant
  • Inflammation / virology
  • Interferons / metabolism
  • Longitudinal Studies
  • Middle Aged
  • Monocytes / metabolism
  • SARS-CoV-2 / immunology
  • Sequence Analysis, RNA
  • Transcriptome
  • Viral Load
  • Young Adult
Citation (ISO format)
VONO, Maria et al. Robust innate responses to SARS-CoV-2 in children resolve faster than in adults without compromising adaptive immunity. In: Cell reports, 2021, vol. 37, n° 1, p. 109773. doi: 10.1016/j.celrep.2021.109773
Main files (1)
Article (Published version)
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Secondary files (2)
Identifiers
ISSN of the journal2211-1247
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117downloads

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