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- W2038911036 abstract "As part of a longer-term goal to create a quantitative mechanistic model of the p53-Mdm2 DNA-damage pathway, we are studying cellular responses to compounds causing DNA-damage by various modes-of action, including two natural polyphenols: quercetin (QUE) and curcumin (CUR). QUE and CUR are weak mutagens in some in vitro assays and possess both anti- or pro-oxidant effects depending on dose. This study examines the dose-response of DNA-damage pathway to these compounds in HT1080 cells (a human cell line with wild-type p53) at doses relevant to human exposure. CUR was more potent in causing reactive oxygen species, DNA damage (measured as phospho-H2AX) and p53 induction, with lowest observed effect levels (LOELs; 3-8 μM) approximately three-fold lower than QUE (20-30 μM). CUR showed a strong G2/M arrest and apoptosis at ≈ 10 μM. QUE caused S phase arrest at low doses (8 μM) and apoptosis was only induced at much higher doses (60 μM). At concentrations with similar levels of p-H2AX and p53 biomarkers, CUR caused greater micronuclei frequency. CUR induced clear increases micronuclei at 3-6 μM, while QUE had a weaker micronuclei response even at the highest doses. Thus, even with two compounds sharing common chemistries, DNA-damage response patterns differed significantly in terms of dose and cell fate." @default.
- W2038911036 created "2016-06-24" @default.
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- W2038911036 date "2013-09-01" @default.
- W2038911036 modified "2023-10-16" @default.
- W2038911036 title "Assessing dose-dependent differences in DNA-damage, p53 response and genotoxicity for quercetin and curcumin" @default.
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- W2038911036 doi "https://doi.org/10.1016/j.tiv.2013.05.015" @default.
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