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DNA damage is accepted as a consequence of thymidylate deprivation induced by chemotherapeutic inhibitors of thymidylate synthase (TS), but the types of damage and signaling responses remain incompletely understood. Thymidylate deprivation increases dUTP and uracil in DNA, which is removed by base excision repair (BER). Because BER requires a synthesis step, strand break intermediates presumably accumulate...
Thymidylate synthase (TS) is an important target of several chemotherapeutic agents, including 5-FU and raltitrexed (Tomudex). During TS inhibition, TTP levels decrease with a subsequent increase in dUTP. Uracil incorporated into the genome is removed by base excision repair (BER). Thus, BER initiated by uracil DNA glycosylase (UDG) activity has been hypothesized to influence the toxicity induced...
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