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

Eosinophilia and intracranial worm recovery in interleukin-5 transgenic and interleukin-5 receptor alpha chain-knockout mice infected with Angiostrongylus cantonensis.

We infected interleukin-5 (IL-5)-transgenic (IL-5-Tg) and IL-5 receptor alpha knockout (IL-5R alpha -/-) mice with Angiostrongylus cantonensis to determine the possible roles of IL-5 and eosinophils in A. cantonensis infection in mice. IL-5-Tg mice demonstrated significantly higher eosinophilia in bone marrow, blood and cerebrospinal fluid (CSF), lower intracranial worm recovery and smaller female worms than naive C3H/HeN mice. Both IL-5-Tg and C3H/HeN mice evoked antigen-specific serum and CSF IgA antibody responses as early as days 5 and 7 postinfection, respectively. Prominent eosinophil infiltration was noted around intracranial worms in the subarachnoid spaces of the mouse brains; eosinophils adhering to the worm surface were degranulated. In contrast, IL-5R alpha -/- mice yielded a higher worm recovery than wild-type or heterozygous mice at day 20 postinfection and failed to provoke CSF eosinophilia. These findings indicate that A. cantonensis infection in the mouse causes IL-5 production and subsequent CSF eosinophilia, the latter probably being involved in the killing of intracranial worms.[1]


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