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NCI Drug Dictionary

  

tetrahydrouridine 
A synthetic pyrimidine nucleoside analogue with biomodulating activity. Tetrahydrouridine increases the efficacy of the radiosensitizer cytochlor (5-chloro-2'-deoxycytidine) by inhibiting the enzyme deoxycytidine monophosphate (dCMP) deaminase and preventing the premature deamination of the cytochlor metabolite 5-chloro-2'-deoxycytidine monophosphate (CldCMP) to 5-chloro-2'-deoxyuridine monophosphate (CldUMP); in turn, this increases tumor concentrations of CldUMP which is then further anabolized and incorporated selectively into tumor DNA as CldU (5-chloro-2'-deoxyuridine). Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
Abbreviation:THU
Chemical structure:2(1H)-pyrimidinone, tetrahydro-4-hydroxy-1-beta-D-ribofuranosyl-