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2018 ; 73
(7
): 1415-1424
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Tumor necrosis factor family member LIGHT acts with IL-1? and TGF-? to promote
airway remodeling during rhinovirus infection
#MMPMID29315623
Mehta AK
; Doherty T
; Broide D
; Croft M
Allergy
2018[Jul]; 73
(7
): 1415-1424
PMID29315623
show ga
BACKGROUND: Rhinovirus (RV) can exacerbate allergen-driven asthma. However, it
has been suggested that serial infections with RV may also lead to asthma-like
features in childhood without prior allergen exposure. AIM: We sought to test the
effects of RV infection in the absence of allergen challenge on lung tissue
remodeling and to understand whether RV induced factors in common with allergen
that promote remodeling. METHODS: We infected C57BL/6 mice multiple times with RV
in the absence or presence of allergen to assess airway remodeling. We used
knockout mice and blocking reagents to determine the participation of LIGHT
(TNFSF14), as well as IL-1? and TGF-?, each previously shown to contribute to
lung remodeling driven by allergen. RESULTS: Recurrent RV infection without
allergen challenge induced an increase in peribronchial smooth muscle mass and
subepithelial fibrosis. Rhinovirus (RV) induced LIGHT expression in mouse lungs
after infection, and alveolar epithelial cells and neutrophils were found to be
potential sources of LIGHT. Accordingly, LIGHT-deficient mice, or mice where
LIGHT was neutralized, displayed reduced smooth muscle mass and lung fibrosis.
Recurrent RV infection also exacerbated the airway remodeling response to house
dust mite allergen, and this was significantly reduced in LIGHT-deficient mice.
Furthermore, neutralizing IL-1? or TGF-? also limited subepithelial fibrosis
and/or smooth muscle thickness induced by RV. CONCLUSION: Rhinovirus can promote
airway remodeling in the absence of allergen through upregulating common factors
that also contribute to allergen-associated airway remodeling.