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- W2149061302 abstract "Inositol polyphosphate phosphatases regulate the magnitude of phosphoinositide-3 kinase signalling output. Although inositol polyphosphate-4-phosphatase is known to regulate phosphoinositide-3 kinase signalling, little is known regarding its role in asthma pathogenesis. Here we show that modulation of inositol polyphosphate-4-phosphatase alters the severity of asthma. Allergic airway inflammation in mice led to calpain-mediated degradation of inositol polyphosphate-4-phosphatase. In allergic airway inflammation models, preventing inositol polyphosphate-4-phosphatase degradation by inhibiting calpain activity, or overexpression of inositol polyphosphate-4-phosphatase in mouse lungs, led to attenuation of the asthma phenotype. Conversely, knockdown of inositol polyphosphate-4-phosphatase severely aggravated the allergic airway inflammation and the asthma phenotype. Interestingly, inositol polyphosphate-4-phosphatase knockdown in lungs of naive mice led to spontaneous airway hyper-responsiveness, suggesting that inositol polyphosphate-4-phosphatase could be vital in maintaining the lung homeostasis. We suggest that inositol polyphosphate-4-phosphatase has an important role in modulating inflammatory response in asthma, and thus, uncover a new understanding of the complex interplay between inositol signalling and asthma, which could provide alternative strategies in asthma management. Inositol polyphosphate 4 phosphatase regulates phosphoinositide signalling and is associated with an increased risk of asthma. Aichet al. show that, in a mouse model of airway inflammation, calpains degrade inositol polyphosphate 4 phosphatase resulting in exacerbated phosphoinositide 3-kinase signalling." @default.
- W2149061302 created "2016-06-24" @default.
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- W2149061302 date "2012-06-06" @default.
- W2149061302 modified "2023-09-27" @default.
- W2149061302 title "Loss-of-function of inositol polyphosphate-4-phosphatase reversibly increases the severity of allergic airway inflammation" @default.
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- W2149061302 doi "https://doi.org/10.1038/ncomms1880" @default.
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