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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Interleukin-10 modulates the severity of hypersensitivity pneumonitis in mice.

Hypersensitivity pneumonitis (HP) is an inflammatory lung disease characterized by granuloma formation. We recently showed that interferon-gamma (IFN-gamma) is essential for inflammation and granuloma formation in HP. Interleukin-10 (IL-10) counteracts many of the biologic effects of IFN-gamma, suggesting that IL-10 modulates inflammation and granuloma formation in HP. We compared the expression of HP in C57BL/6 mice that lack IL-10 (IL-10 knockout [KO]) with that in wild-type (WT) littermates. IL-10 KO and WT mice were exposed to the thermophilic bacteria Saccharopolyspora rectivirgula or to saline alone for 3 wk. The IL-10 KO mice had higher cell counts in their bronchoalveolar lavage fluid (2.85 +/- 0. 43 x 10(6)) than did WT mice (1.4 +/- 0.3 x 10(6)/ml; P < 0.03), with a more prominent neutrophil response. They also had greater inflammation after antigen exposure than did the WT mice (P < 0. 0001). There was increased upregulation of IFN-gamma, IL-1, and tumor necrosis factor-alpha (TNF-alpha) mRNAs in the lungs of IL-10 KO mice. Adenovirus-mediated gene transfer of IL-10 to the liver of IL-10 KO mice reduced the inflammation from that seen in WT mice. These studies show that IL-10 has important anti-inflammatory properties in HP, and that lack of this cytokine leads to a more severe granulomatous inflammatory response.[1]


  1. Interleukin-10 modulates the severity of hypersensitivity pneumonitis in mice. Gudmundsson, G., Bosch, A., Davidson, B.L., Berg, D.J., Hunninghake, G.W. Am. J. Respir. Cell Mol. Biol. (1998) [Pubmed]
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