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2016 ; 6
(ä): 26928
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The novel compound Sul-121 inhibits airway inflammation and hyperresponsiveness
in experimental models of chronic obstructive pulmonary disease
#MMPMID27229886
Han B
; Poppinga WJ
; Zuo H
; Zuidhof AB
; Bos IS
; Smit M
; Vogelaar P
; Krenning G
; Henning RH
; Maarsingh H
; Halayko AJ
; van Vliet B
; Stienstra S
; Graaf AC
; Meurs H
; Schmidt M
Sci Rep
2016[May]; 6
(ä): 26928
PMID27229886
show ga
COPD is characterized by persistent airflow limitation, neutrophilia and
oxidative stress from endogenous and exogenous insults. Current COPD therapy
involving anticholinergics, ?2-adrenoceptor agonists and/or corticosteroids, do
not specifically target oxidative stress, nor do they reduce chronic pulmonary
inflammation and disease progression in all patients. Here, we explore the
effects of Sul-121, a novel compound with anti-oxidative capacity, on
hyperresponsiveness (AHR) and inflammation in experimental models of COPD. Using
a guinea pig model of lipopolysaccharide (LPS)-induced neutrophilia, we
demonstrated that Sul-121 inhalation dose-dependently prevented LPS-induced
airway neutrophilia (up to ~60%) and AHR (up to ~90%). Non-cartilaginous airways
neutrophilia was inversely correlated with blood H2S, and LPS-induced attenuation
of blood H2S (~60%) was prevented by Sul-121. Concomitantly, Sul-121 prevented
LPS-induced production of the oxidative stress marker, malondialdehyde by ~80%.
In immortalized human airway smooth muscle (ASM) cells, Sul-121 dose-dependently
prevented cigarette smoke extract-induced IL-8 release parallel with inhibition
of nuclear translocation of the NF-?B subunit, p65 (each ~90%). Sul-121 also
diminished cellular reactive oxygen species production in ASM cells, and
inhibited nuclear translocation of the anti-oxidative response regulator, Nrf2.
Our data show that Sul-121 effectively inhibits airway inflammation and AHR in
experimental COPD models, prospectively through inhibition of oxidative stress.