[No authors listed]
Innate immunity plays an important role in combating microbial infection in animals. During bacterial infection in Drosophila melanogaster gut, Dual oxidase (Duox) generates reactive oxygen species to fight against the infected microbes. Concurrently, antioxidant systems eliminate residual and protect the hosts. Here we found that Drosophila melanogaster Peroxiredoxin V (dPrxV) is an immune-related antioxidant enzyme which maintains intestinal redox homeostasis. dPrxV was highly expressed in gut and induced by the oral infection of Erwinia carotovora carotovora. dPrxV expression was increased by the gut-specific Duox overexpression but decreased by Duox inhibition. Moreover, dPrxV expression was mediated by the JNK/FOXO signaling and dPrxV mutant reduced survival after gut infection. These results suggest that JNK/FOXO mediated dPrxV expression plays a critical role in Drosophila melanogaster gut during bacterial infection in protecting the host gut epithelial cells from oxidative damage.
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