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

IL-18 with IL-2 protects against Strongyloides venezuelensis infection by activating mucosal mast cell-dependent type 2 innate immunity.

C57BL/6 (B6) and B6 background STAT6(-/-) mice pretreated with IL-18 plus IL-2 showed prominent intestinal mastocytosis and rapidly expelled implanted adult worms of the gastrointestinal nematode Strongyloides venezuelensis. In contrast, identically pretreated mast cell-deficient W/W(v) mice failed to do so. Thus, activated mucosal mast cells (MMC) are crucial for parasite expulsion. B6 mice infected with S. venezuelensis third-stage larvae (L3) completed parasite expulsion by day 12 after infection, whereas IL-18(-/-) or IL-18Ralpha(-/-) B6 mice exhibited marked impairment in parasite expulsion, suggesting a substantial contribution of IL-18-dependent MMC activation to parasite expulsion. Compared with IL-18(-/-) or IL-18Ralpha(-/-) mice, S. venezuelensis L3-infected STAT6(-/-) mice have poorly activated MMC and sustained infection; although their IL-18 production is normal. Neutralization of IL-18 and IL-2 further reduces expulsion in infected STAT6(-/-) mice. These results suggest that collaboration between IL-18-dependent and Th2 cell-dependent mastocytosis is important for prompt parasite expulsion.[1]

References

  1. IL-18 with IL-2 protects against Strongyloides venezuelensis infection by activating mucosal mast cell-dependent type 2 innate immunity. Sasaki, Y., Yoshimoto, T., Maruyama, H., Tegoshi, T., Ohta, N., Arizono, N., Nakanishi, K. J. Exp. Med. (2005) [Pubmed]
 
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