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2018 ; 8
(1
): 6201
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Wogonin attenuates nasal polyp formation by inducing eosinophil apoptosis through
HIF-1? and survivin suppression
#MMPMID29670184
Khalmuratova R
; Lee M
; Mo JH
; Jung Y
; Park JW
; Shin HW
Sci Rep
2018[Apr]; 8
(1
): 6201
PMID29670184
show ga
Chronic rhinosinusitis (CRS) with nasal polyps (CRSwNP) is an inflammatory
sinonasal disorder characterized by eosinophilic inflammation and T-helper 2
skewing. Eosinophil accumulation in sinonasal mucosa comprises a major feature of
CRSwNP. The study aimed to investigate the effect of the flavone wogonin in nasal
polyposis by assessing its ability to induce eosinophil apoptosis in vitro and
attenuate eosinophilic CRSwNP in mice. Double immunofluorescence,
immunohistochemistry, flow cytometry, and immunoblotting were performed to
evaluate hypoxia-inducible factor (HIF)-1?, survivin, and apoptotic markers in
the human eosinophilic EoL-1 cell line or sinonasal tissues from patients with
CRS with or without NPs. In sinonasal specimens from patients with CRS, HIF-1?
and survivin were up-regulated in eosinophils from patients with NPs compared
with levels in patients without NPs. Under hypoxia, HIF-1? and survivin
expression was up-regulated in EoL-1 cells. Wogonin down-regulated both HIF-1?
and survivin in EoL-1 cells. In addition, overexpression of survivin protected
EoL-1 cells against apoptosis in response to wogonin. Moreover, wogonin
attenuated nasal polyp formation in a murine model. Our findings suggest that
wogonin could induce caspase-3 activation by suppressing HIF-1? and survivin
expression in EoL-1 cells. Further studies regarding novel therapeutic options
for CRSwNP targeting eosinophil apoptosis are needed.