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- W4319016174 abstract "We previously reported that phenethyl isothiocyanate (PEITC), a dietary-related compound, can rescue mutant p53. A structure-activity relationships study showed that the synthetic analog 2,2-diphenylethyl isothiocyanate (DPEITC) is a more potent inducer of apoptosis than natural or synthetic ITCs. Here, we showed that DPEITC inhibited the growth of triple-negative breast cancer cells (MDA-MB-231, MDA-MB-468, and Hs578T) expressing hotspot p53 mutants, structural (p53R280K, p53R273H) or contact (p53V157F), at IC50 values significantly lower than PEITC. DPEITC inhibited the growth of HER2+ (p53R175H SK-BR-3, p53R175H AU565) and Luminal A (p53L194F T47D) breast cancer (BC) cells harboring a p53 structural mutant. DPEITC induced apoptosis, irrespective of BC subtypes, by rescuing p53 mutants. Accordingly, the rescued p53 mutants induced apoptosis by activating canonical WT p53 targets and delaying the cell cycle. DPEITC acted synergistically with doxorubicin and camptothecin to inhibit proliferation and induce apoptosis. Under these conditions, DPEITC delayed BC cells in the G1 phase, activated p53 canonical targets, and enhanced pS1981-ATM. DPEITC reduced the expression of MDR1 and ETS1. These findings are the first report of synergism between a synthetic ITC and a chemotherapy drug via mutant p53 rescue. Furthermore, our data demonstrate that ITCs suppress the expression of cellular proteins that play a role in chemoresistance." @default.
- W4319016174 created "2023-02-03" @default.
- W4319016174 creator A5013594580 @default.
- W4319016174 date "2023-02-01" @default.
- W4319016174 modified "2023-09-26" @default.
- W4319016174 title "2,2-Diphenethyl Isothiocyanate Enhances Topoisomerase Inhibitor-Induced Cell Death and Suppresses Multi-Drug Resistance 1 in Breast Cancer Cells" @default.
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- W4319016174 doi "https://doi.org/10.3390/cancers15030928" @default.
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