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Sensing microbial infections in the Drosophila melanogaster genetic model organism

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Abstract

Insects occupy a central position in the biosphere. They are able to resist infections even though they lack an adaptive immune system. Drosophila melanogaster has been used as a potent genetic model to understand innate immunity both in invertebrates and vertebrates. Its immune system includes both humoral and cellular arms. Here, we review how the distinct immune responses are triggered upon sensing infections, with an emphasis on the mechanisms that lead to systemic humoral immune responses. As in plants, the components of the cell wall of microorganisms are detected by dedicated receptors. There is also an induction of the systemic immune response upon sensing the proteolytic activities of microbial virulence factors. The antiviral response mostly relies on sensing double-stranded RNAs generated during the viral infection cycle. This event subsequently triggers either the viral short interfering RNA pathway or a cGAS-like/STING/NF-κB signaling pathway.

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  1. Université de Strasbourg, UPR 9022 du CNRS, Strasbourg, France

    Samuel Liegeois & Dominique Ferrandon

  2. Sino-French Hoffman Institute, Guangzhou Medical University, Guangzhou, China

    Samuel Liegeois & Dominique Ferrandon

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Liegeois, S., Ferrandon, D. Sensing microbial infections in the Drosophila melanogaster genetic model organism. Immunogenetics 74, 35–62 (2022). https://doi.org/10.1007/s00251-021-01239-0

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