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2018 ; 10
(6
): 1415-1423
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Induction of neutrophil apoptosis by a Bcl-2 inhibitor reduces particulate
matter-induced lung inflammation
#MMPMID29944468
Geng X
; Wang X
; Luo M
; Xing M
; Wu Y
; Li W
; Chen Z
; Shen H
; Ying S
Aging (Albany NY)
2018[Jun]; 10
(6
): 1415-1423
PMID29944468
show ga
BackgroundEnvironmental particulate matter exposure can cause various respiratory
problems including aggravated asthma, decreased lung function and increased
respiratory symptoms. However, the molecular mechanisms underlying PM-induced
lung inflammation are incompletely understood. Effective therapeutic strategies
are required.ResultsA mouse model of particulate matter-induced lung inflammation
was used to identify the pathology and the molecular mechanisms for particulate
matter-induced lung inflammation. The mouse model revealed that particulate
matter induced neutrophil-dominated lung inflammation. Neutrophils derived from
particulate matter-instilled mice showed decreased apoptosis and elevated Bcl-2
expression. Further studies in vav-Bcl-2 transgenic mice made it clear that Bcl-2
overexpression caused a marked increase in neutrophils in bronchoalveolar lavage
fluid. Furthermore, we found that the Bcl-2 inhibitor ABT-199 reduced particulate
matter-induced lung inflammation, and induced apoptosis of neutrophils in
particulate matter-induced lung inflammation mice model.ConclusionsParticulate
matter-induced lung inflammation is mediated in part by inhibition of apoptosis
of inflammatory cells. Bcl-2 is responsible for the reduced apoptosis of
inflammatory cells in particulate matter-induced lung inflammation. The Bcl-2
selective inhibitor ABT-199 reduces particulate matter-induced lung inflammation
by inducing the apoptosis of neutrophils and might be a promising drug for the
treatment of particulate matter-induced lung inflammation.