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- W2912778487 abstract "In their natural habitat of rotting fruit, the nematode Caenorhabditis elegans feeds on the complex bacterial communities that thrive in this rich growth medium. Hundreds of diverse bacterial strains cultured from such rotting fruit allow C. elegans growth and reproduction when tested individually. In screens for C. elegans responses to single bacterial strains associated with nematodes in fruit, we found that Rhizobium causes a genome instability phenotype; we observed abnormally long or fragmented intestinal nuclei due to aberrant nuclear division, or defective karyokinesis. The karyokinesis defects were restricted to intestinal cells and required close proximity between bacteria and the worm. A genetic screen for C. elegans mutations that cause the same intestinal karyokinesis defect followed by genome sequencing of the isolated mutant strains identified mutations that disrupt DNA damage repair pathways, suggesting that Rhizobium may cause DNA damage in C. elegans intestinal cells. We hypothesized that such DNA damage is caused by reactive oxygen species produced by Rhizobium and found that hydrogen peroxide added to benign Escherichia coli can cause the same intestinal karyokinesis defects in WT C. elegans Supporting this model, free radical scavengers suppressed the Rhizobium-induced C. elegans DNA damage. Thus, Rhizobium may signal to eukaryotic hosts via reactive oxygen species, and the host may respond with DNA damage repair pathways." @default.
- W2912778487 created "2019-02-21" @default.
- W2912778487 creator A5066998461 @default.
- W2912778487 creator A5091570349 @default.
- W2912778487 date "2019-02-11" @default.
- W2912778487 modified "2023-09-29" @default.
- W2912778487 title "<i>Rhizobium</i> induces DNA damage in <i>Caenorhabditis elegans</i> intestinal cells" @default.
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- W2912778487 doi "https://doi.org/10.1073/pnas.1815656116" @default.
- W2912778487 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6397575" @default.
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