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2016 ; 6
(ä): 37045
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Hierarchical effects of pro-inflammatory cytokines on the post-influenza
susceptibility to pneumococcal coinfection
#MMPMID27872472
Duvigneau S
; Sharma-Chawla N
; Boianelli A
; Stegemann-Koniszewski S
; Nguyen VK
; Bruder D
; Hernandez-Vargas EA
Sci Rep
2016[Nov]; 6
(ä): 37045
PMID27872472
show ga
In the course of influenza A virus (IAV) infections, a secondary bacterial
infection frequently leads to serious respiratory conditions provoking high
hospitalization and death tolls. Although abundant pro-inflammatory responses
have been reported as key contributing factors for these severe dual infections,
the relative contributions of cytokines remain largely unclear. In the current
study, mathematical modelling based on murine experimental data dissects IFN-? as
a cytokine candidate responsible for impaired bacterial clearance, thereby
promoting bacterial growth and systemic dissemination during acute IAV infection.
We also found a time-dependent detrimental role of IL-6 in curtailing bacterial
outgrowth which was not as distinct as for IFN-?. Our numerical simulations
suggested a detrimental effect of IFN-? alone and in synergism with IL-6 but no
conclusive pathogenic effect of IL-6 and TNF-? alone. This work provides a
rationale to understand the potential impact of how to manipulate temporal immune
components, facilitating the formulation of hypotheses about potential
therapeutic strategies to treat coinfections.