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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 Front+Cell+Infect+Microbiol
2017 ; 7
(ä): 243
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Harnessing Neutrophil Survival Mechanisms during Chronic Infection by Pseudomonas
aeruginosa: Novel Therapeutic Targets to Dampen Inflammation in Cystic Fibrosis
#MMPMID28713772
Marteyn BS
; Burgel PR
; Meijer L
; Witko-Sarsat V
Front Cell Infect Microbiol
2017[]; 7
(ä): 243
PMID28713772
show ga
More than two decades after cloning the cystic fibrosis transmembrane regulator
(CFTR) gene, the defective gene in cystic fibrosis (CF), we still do not
understand how dysfunction of this ion channel causes lung disease and the
tremendous neutrophil burden which persists within the airways; nor why chronic
colonization by Pseudomonas aeruginosa develops in CF patients who are thought to
be immunocompetent. It appears that the microenvironment within the lung of CF
patients provides favorable conditions for both P. aeruginosa colonization and
neutrophil survival. In this context, the ability of bacteria to induce hypoxia,
which in turn affects neutrophil survival is an additional level of complexity
that needs to be accounted for when controlling neutrophil fate in CF. Recent
studies have underscored the importance of neutrophils in innate immunity and
their functions appear to extend far beyond their well-described role in
antibacterial defense. Perhaps a disturbance in neutrophil reprogramming during
the course of an infection severely modulates the inflammatory response in CF.
Furthermore there is an emerging concept that the CFTR itself may be an immune
modulator and stimulating CFTR function in CF patients could promote neutrophil
and macrophages antimicrobial function. Fostering the resolution of inflammation
by favoring neutrophil apoptosis could preserve their microbicidal activities but
decrease their proinflammatory potential. In this context, triggering neutrophil
apoptosis with roscovitine may be a potential therapeutic option and this is
currently being evaluated in CF patients. In the present review we discuss how
neutrophils functions are disturbed in CF and how this may relate to chronic
infection with P. aeuginosa and we propose novel research directions aimed at
modulating neutrophil survival, dampening lung inflammation and ultimately
leading to an amelioration of the lung disease.