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Published in: Annals of Intensive Care 1/2018

Open Access 01-12-2018 | Research

Occurrence of marked sepsis-induced immunosuppression in pediatric septic shock: a pilot study

Authors: Solenn Remy, Karine Kolev-Descamps, Morgane Gossez, Fabienne Venet, Julie Demaret, Etienne Javouhey, Guillaume Monneret

Published in: Annals of Intensive Care | Issue 1/2018

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Abstract

Background

While the process of sepsis-induced immunosuppression is now well described in adults, very little information is available on immune functions in pediatric sepsis. The current study investigated this in children with septic shock by performing immunomonitoring, including both innate (monocyte human leukocyte antigen-DR, mHLA-DR, expression) and adaptive immunity (lymphocyte subsets count), as well as cytokine concentrations (IL-6, IL-8, IL-10, IL-1Ra, TNF-α, IFN-γ). Subsequent objectives were to assess the associations between inflammatory response, potential immunosuppression and secondary acquired infection occurrence.

Methods

Single-center prospective observational study, including children aged between 1 month and 18 years admitted to pediatric intensive care unit (PICU) for septic shock. Age-matched controls were children hospitalized for elective surgery without any infectious criteria. Blood was sampled at day 1–2, 3–5, and 7–9 after sepsis onset. mHLA-DR and lymphocyte subsets count were measured by flow cytometry and cytokine concentrations by Luminex technology.

Results

A total of 26 children and 30 controls were included. Patients had lymphopenia, and mHLA-DR levels were significantly lower than controls at each time point (p < 0.0001). All cytokines peaked at day 1–2. Children with secondary acquired infection had lower day 3–5 mHLA-DR and higher pro-inflammatory cytokine concentrations (IL-6, IL-8 and TNF-α) at day 1–2 compared to children without secondary acquired infection.

Conclusions

The higher initial inflammatory cytokine production was, the more innate immunity was altered, while evaluated by low mHLA-DR expression. Children with decreased mHLA-DR expression developed more secondary acquired infections. Upon confirmation in multicenter cohorts, these results pave the way for immunostimulation for the most immunosuppressed children in order to prevent nosocomial infections in PICU.
Trial registration PedIRIS study NCT02848144. Retrospectively registered 28 July 2016
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Metadata
Title
Occurrence of marked sepsis-induced immunosuppression in pediatric septic shock: a pilot study
Authors
Solenn Remy
Karine Kolev-Descamps
Morgane Gossez
Fabienne Venet
Julie Demaret
Etienne Javouhey
Guillaume Monneret
Publication date
01-12-2018
Publisher
Springer International Publishing
Published in
Annals of Intensive Care / Issue 1/2018
Electronic ISSN: 2110-5820
DOI
https://doi.org/10.1186/s13613-018-0382-x

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