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

Ovarian tumors in rbp9 mutants of Drosophila induce and immune response.

The Drosophila protein, Rbp9, is homologous to human Hu, which is reported to be involved in small cell lung cancer. Rbp9 functions in cystocyte differentiation, and mutations in Rbp9 cause ovarian tumors. Here we show that the antimicrobial peptide, Attacin, is upregulated in Rbp9 mutants, especially in ovaries where tumors form. Upregulation seems to result from activation of the NF-kappaB pathway since we detected nuclear localization of Relish in Rbp9 mutant ovaries but not in wild type ovaries. Inactivation of NF-kappaB in the Rbp9 mutant allows prolonged survival of malformed egg chambers. We conclude that Drosophila initiates an anti-tumor defense response via activation of NF-kappaB.[1]


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