Nitrobenzocyclophosphamides as potential prodrugs for bioreductive activation: synthesis, stability, enzymatic reduction, and antiproliferative activity in cell culture
摘要:
In efforts to obtain potential anticancer prodrugs for gene-directed enzyme prodrug therapy using Eschericia coli nitroreductase, a series of four benzocyclophosphamide analogues were designed and synthesized incorporating a strategically placed nitro group in a position para to the benzylic carbon for reductive activation. All four analogues were found to be stable in phosphate buffer at pH 7.4 and 37 degreesC and were good substrates of E. coli nitroreductase with half lives between 7 and 24 min at pH 7.0 and 37 degreesC. However, only two analogues 6a and 6c, both with a benzylic oxygen in the phosphorinane ring para to the nitro group, showed a modest 33-36-fold enhanced cytotoxicity in E. coli nitroreductase-expressing cells. These results suggest that good substrate activity and the para benzylic oxygen are required for activation by E. coli nitroreductase. Compounds 6a and 6c represent a new structure type for reductive activation and a lead for further modification in the development of better analogues with improved selective toxicity to be used in gene-directed enzyme prodrug therapy. (C) 2003 Elsevier Ltd. All rights reserved.
Nitrobenzocyclophosphamides as potential prodrugs for bioreductive activation: synthesis, stability, enzymatic reduction, and antiproliferative activity in cell culture
摘要:
In efforts to obtain potential anticancer prodrugs for gene-directed enzyme prodrug therapy using Eschericia coli nitroreductase, a series of four benzocyclophosphamide analogues were designed and synthesized incorporating a strategically placed nitro group in a position para to the benzylic carbon for reductive activation. All four analogues were found to be stable in phosphate buffer at pH 7.4 and 37 degreesC and were good substrates of E. coli nitroreductase with half lives between 7 and 24 min at pH 7.0 and 37 degreesC. However, only two analogues 6a and 6c, both with a benzylic oxygen in the phosphorinane ring para to the nitro group, showed a modest 33-36-fold enhanced cytotoxicity in E. coli nitroreductase-expressing cells. These results suggest that good substrate activity and the para benzylic oxygen are required for activation by E. coli nitroreductase. Compounds 6a and 6c represent a new structure type for reductive activation and a lead for further modification in the development of better analogues with improved selective toxicity to be used in gene-directed enzyme prodrug therapy. (C) 2003 Elsevier Ltd. All rights reserved.
Nitroaryl phosphoramide compositions and methods for targeting and inhibiting undesirable cell growth or proliferation
申请人:——
公开号:US20040214798A1
公开(公告)日:2004-10-28
The present invention relates to nitroaryl-substituted phosphoramide prodrug compounds and methods of producing the same for use in targeting and inhibiting undesirable cell growth or proliferation.
本发明涉及硝基芳基取代的磷酰胺前药化合物及其制备方法,用于靶向和抑制不良细胞生长或增殖。
Nitrobenzocyclophosphamides as potential prodrugs for bioreductive activation: synthesis, stability, enzymatic reduction, and antiproliferative activity in cell culture
作者:Z Li
DOI:10.1016/s0968-0896(03)00459-0
日期:2003.9.15
In efforts to obtain potential anticancer prodrugs for gene-directed enzyme prodrug therapy using Eschericia coli nitroreductase, a series of four benzocyclophosphamide analogues were designed and synthesized incorporating a strategically placed nitro group in a position para to the benzylic carbon for reductive activation. All four analogues were found to be stable in phosphate buffer at pH 7.4 and 37 degreesC and were good substrates of E. coli nitroreductase with half lives between 7 and 24 min at pH 7.0 and 37 degreesC. However, only two analogues 6a and 6c, both with a benzylic oxygen in the phosphorinane ring para to the nitro group, showed a modest 33-36-fold enhanced cytotoxicity in E. coli nitroreductase-expressing cells. These results suggest that good substrate activity and the para benzylic oxygen are required for activation by E. coli nitroreductase. Compounds 6a and 6c represent a new structure type for reductive activation and a lead for further modification in the development of better analogues with improved selective toxicity to be used in gene-directed enzyme prodrug therapy. (C) 2003 Elsevier Ltd. All rights reserved.