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- W2892057032 abstract "Imbalance in the level of the pyrimidine degradation products dihydrouracil and dihydrothymine is associated with cellular transformation and cancer progression. Dihydropyrimidines are degraded by dihydropyrimidinase (DHP), a zinc metalloenzyme that is upregulated in solid tumors but not in the corresponding normal tissues. How dihydropyrimidine metabolites affect cellular phenotypes remains elusive. Here we show that the suppression of DHP in cancer cell lines is cytotoxic. An increase in the level of dihydropyrimidines induced DNA replication and transcriptional stress. Cells lacking DHP accumulated DNA-protein crosslinks (DPCs), including covalently trapped DNA polymerase eta. Furthermore, we show that the plant flavonoid dihydromyricetin inhibits human DHP activity. Cellular exposure to dihydromyricetin triggered DPCs-dependent DNA replication stress in cancer cells. This study defines dihydropyrimidines as potentially cytotoxic metabolites that may offer an opportunity for therapeutic-targeting of DHP activity in solid tumors." @default.
- W2892057032 created "2018-09-27" @default.
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- W2892057032 date "2018-09-18" @default.
- W2892057032 modified "2023-10-09" @default.
- W2892057032 title "Dihydropyrimidinase protects from DNA replication stress caused by cytotoxic metabolites." @default.
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- W2892057032 doi "https://doi.org/10.1101/420893" @default.
- W2892057032 hasPublicationYear "2018" @default.
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