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- W2320004681 abstract "Resveratrol is an important phytoalexin notable for a wide variety of beneficial activities. Resveratrol has been reported to be active against various pathogenic bacteria. However, it is not clear at the molecular level how this important activity is manifested. Resveratrol has been reported to bind to cupric ions and reduce it. In the process, it generates copper-peroxide complex and reactive oxygen species (ROS). Due to this ability, resveratrol has been shown to cleave plasmid DNA in several studies. To this end, we envisaged DNA damage to play a role in resveratrol mediated inhibition in Escherichia coli. We employed DNA damage repair deficient mutants from keio collection to demonstrate the hypersensitive phenotype upon resveratrol treatment. Analysis of integrity and PCR efficiency of plasmid DNA from resveratrol-treated cells revealed significant DNA damage after 6 h or more compared to DNA from vehicle-treated cells. RAPD-PCR was performed to demonstrate the damage in genomic DNA from resveratrol-treated cells. In addition, in situ DNA damage was observed under fluorescence microscopy after resveratrol treatment. Further resveratrol treatment resulted in cell cycle arrest of significant fraction of population revealed by flow cytometry. However, a robust induction was not observed in phage induction assay and induction of DNA damage response genes quantified by promoter fused fluorescent tracker protein. These observations along with our previous observation that resveratrol induces membrane damage in E. coli at early time point reveal, DNA damage is a late event, occurring after a few hours of treatment." @default.
- W2320004681 created "2016-06-24" @default.
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- W2320004681 date "2016-05-04" @default.
- W2320004681 modified "2023-10-10" @default.
- W2320004681 title "DNA damage is a late event in resveratrol-mediated inhibition of<i>Escherichia coli</i>" @default.
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- W2320004681 doi "https://doi.org/10.3109/10715762.2016.1169404" @default.
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