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- W2109755061 abstract "BackgroundBoth active and passive smoking are considered to be risk factors for asthma development. However, the precise mechanisms involved remain elusive. Recently, thymic stromal lymphopoietin (TSLP) has been shown to play a key role in the development of TH2-type allergic inflammation in patients with asthma.ObjectiveThe aim of this study was to investigate whether there was a causal relationship between cigarette smoke exposure and TSLP expression in the lung.MethodsWe examined the effects of repeated intranasal exposure of cigarette smoke extract (CSE) on TSLP mRNA and protein expression in the mouse lung by means of real-time PCR, Western blotting, and immunohistochemistry. We also examined the effects of intranasal exposure of CSE plus ovalbumin (OVA) on TH2-type immune responses and lung pathology.ResultsRepeated exposure of CSE induced TSLP mRNA and protein expression, which was inhibited by treatment with antioxidative N-acetylcysteine and by TNF-α receptor I deficiency. In addition, the intranasal exposure of CSE simultaneously with OVA induced OVA-specific TH2-type immune responses and airway inflammation, which were inhibited by the blockade of the TSLP activity.ConclusionCSE induced TSLP expression in the mouse lung in an oxidative stress–dependent and TNF-α receptor I–dependent manner, and when challenged simultaneously with an antigen, CSE promoted the development of airway inflammation in association with TH2-type immune responses. Both active and passive smoking are considered to be risk factors for asthma development. However, the precise mechanisms involved remain elusive. Recently, thymic stromal lymphopoietin (TSLP) has been shown to play a key role in the development of TH2-type allergic inflammation in patients with asthma. The aim of this study was to investigate whether there was a causal relationship between cigarette smoke exposure and TSLP expression in the lung. We examined the effects of repeated intranasal exposure of cigarette smoke extract (CSE) on TSLP mRNA and protein expression in the mouse lung by means of real-time PCR, Western blotting, and immunohistochemistry. We also examined the effects of intranasal exposure of CSE plus ovalbumin (OVA) on TH2-type immune responses and lung pathology. Repeated exposure of CSE induced TSLP mRNA and protein expression, which was inhibited by treatment with antioxidative N-acetylcysteine and by TNF-α receptor I deficiency. In addition, the intranasal exposure of CSE simultaneously with OVA induced OVA-specific TH2-type immune responses and airway inflammation, which were inhibited by the blockade of the TSLP activity. CSE induced TSLP expression in the mouse lung in an oxidative stress–dependent and TNF-α receptor I–dependent manner, and when challenged simultaneously with an antigen, CSE promoted the development of airway inflammation in association with TH2-type immune responses." @default.
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- W2109755061 date "2008-12-01" @default.
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- W2109755061 title "Cigarette smoke extract induces thymic stromal lymphopoietin expression, leading to TH2-type immune responses and airway inflammation" @default.
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- W2109755061 doi "https://doi.org/10.1016/j.jaci.2008.09.022" @default.
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