Nitrobenzyl carbamate prodrugs of enediynes for nitroreductase gene-directed enzyme prodrug therapy (GDEPT).
The synthesis and evaluation of the 4-nitrobenzylcarbamate enediyne 6 and related compounds as prodrugs activated by a nitroreductase enzyme (NTR) from E. coli B is described. Expression of NTR in three different cell lines gives increases in cytotoxicity of 21- to 135-fold for 6 (IC50 values 13-24 nM in the NTR-expressing lines), indicating its potential as a prodrug for NTR-mediated Gene-Directed Enzyme Prodrug Therapy. The cytotoxicity of 6 and related enediynes is shown to be oxygen-dependent, especially in nucleotide excision repair-proficient cells, which might limit activity in hypoxic regions of tumours.
Hay
M P
MP
Auckland Cancer Society Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, New Zealand.
Wilson
W R
WR
Denny
W A
WA
D000818:Animals; D000970:Antineoplastic Agents / Q000737:chemistry / Q000494:pharmacology / Q000627:therapeutic use*; D002460:Cell Line; D006224:Cricetinae; D006801:Humans; D009601:Nitroreductases / Q000235:genetics*; D011355:Prodrugs / Q000737:chemistry / Q000494:pharmacology / Q000627:therapeutic use*; D014407:Tumor Cells, Cultured
D000970:Antineoplastic Agents; D011355:Prodrugs; D009601:Nitroreductases