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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Immunology
2015 ; 146
(1
): 100-12
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Interleukin-10 plays a key role in the modulation of neutrophils recruitment and
lung inflammation during infection by Streptococcus pneumoniae
#MMPMID26032199
Peñaloza HF
; Nieto PA
; Muñoz-Durango N
; Salazar-Echegarai FJ
; Torres J
; Parga MJ
; Alvarez-Lobos M
; Riedel CA
; Kalergis AM
; Bueno SM
Immunology
2015[Sep]; 146
(1
): 100-12
PMID26032199
show ga
Streptococcus pneumoniae is a major aetiological agent of pneumonia worldwide, as
well as otitis media, sinusitis, meningitis and sepsis. Recent reports have
suggested that inflammation of lungs due to S. pneumoniae infection promotes
bacterial dissemination and severe disease. However, the contribution of
anti-inflammatory molecules to the pathogenesis of S. pneumoniae remains unknown.
To elucidate whether the production of the anti-inflammatory cytokine
interleukin-10 (IL-10) is beneficial or detrimental for the host during
pneumococcal pneumonia, we performed S. pneumoniae infections in mice lacking
IL-10 (IL-10(-/-) mice). The IL-10(-/-) mice showed increased mortality, higher
expression of pro-inflammatory cytokines, and an exacerbated recruitment of
neutrophils into the lungs after S. pneumoniae infection. However, IL-10(-/-)
mice showed significantly lower bacterial loads in lungs, spleen, brain and
blood, when compared with mice that produced this cytokine. Our results support
the notion that production of IL-10 during S. pneumoniae infection modulates the
expression of pro-inflammatory cytokines and the infiltration of neutrophils into
the lungs. This feature of IL-10 is important to avoid excessive inflammation of
tissues and to improve host survival, even though bacterial dissemination is less
efficient in the absence of this cytokine.