Increased hyperoxia-induced mortality and acute lung injury in IL-13 null mice.

Authors: Bhandari, V  Choo-Wing, R  Homer, RJ  Elias, JA 
Citation: Bhandari V, etal., J Immunol. 2007 Apr 15;178(8):4993-5000.
Pubmed: (View Article at PubMed) PMID:17404281

IL-13 is a critical effector at sites of Th2 inflammation and remodeling. As a result, anti-IL-13-based therapies are being actively developed to treat a variety of diseases and disorders. However, the beneficial effects of endogenous IL-13 in the normal and diseased lung have not been adequately defined. We hypothesized that endogenous IL-13 is an important regulator of oxidant-induced lung injury and inflammation. To test this hypothesis, we compared the effects of 100% O(2) in mice with wild-type and null IL-13 loci. In this study, we demonstrate that hyperoxia significantly augments the expression of the components of the IL-13R, IL-13Ralpha1, and IL-4Ralpha. We also demonstrate that, in the absence of IL-13, hyperoxia-induced tissue inflammation is decreased. In contrast, in the IL-13 null mice, DNA injury, cell death, caspase expression, and activation and mortality are augmented. Interestingly, the levels of the cytoprotective cytokines vascular endothelial cell growth factor, IL-6, and IL-11 were decreased in the bronchoalveolar lavage fluid. These studies demonstrate that the expression of the IL-13R is augmented and that the endogenous IL-13-IL-13R pathway contributes to the induction of inflammation and the inhibition of injury in hyperoxic acute lung injury.

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RGD ID: 4145647
Created: 2010-11-11
Species: All species
Last Modified: 2010-11-11
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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.