Chemical Basis for the Biological Activity of Imexon and Related Cyanoaziridines
摘要:
Chemical aspects of mode of action of imexon and related cyanoaziridines were studied. These compounds do not alkylate DNA nor react with the is an element of-amino groups of L-lysine, despite the presence of an aziridine ring. They do react readily with biologically important sulfhydryl compounds to give products derived from either aziridine ring opening, interaction with the cyano group of cyanoaziridines, or opening of the iminopyrrolidone ring of imexon. The products from reactions of imexon and related cyanoaziridines with thiols are not as potent as their parent compounds against tumor cells. These results are consistent with biological studies that show that the mechanism of cytotoxicity involves thiol depletion followed by oxidative stress leading to apoptosis.
A set of 20 2-cyanoaziridine-1-carboxamides was synthesized from 2-cyanoaziridine and appropriate isocyanates. These compounds were active against a variety of solid and hematological tumor cells in culture, including strains resistant to doxorubicin and mitoxantrone. Their potencies in these assays correlated with the lipophilicity of substituents. The N-phenyl derivative was more potent and equally effective to imexon, a cyclized 2-cyanoaziridine-1-carboxamide of clinical interest, against cloned fresh human tumors.
Disclosed are novel compositions comprising a lipid and imexon or a derivative thereof. Also disclosed are liposomal compositions comprising imexon or a derivative thereof. Methods for administrating pharmaceutically acceptable compositions comprising a lipid and imexon or a derivative thereof for the treatment of diseases, such as cancer, are also disclosed herein.
作者:Bhashyam S. Iyengar、Robert T. Dorr、David S. Alberts、Evan M. Hersh、Sydney E. Salmon、William A. Remers
DOI:10.1021/jm980600x
日期:1999.2.1
A set of 20 2-cyanoaziridine-1-carboxamides was synthesized from 2-cyanoaziridine and appropriate isocyanates. These compounds were active against a variety of solid and hematological tumor cells in culture, including strains resistant to doxorubicin and mitoxantrone. Their potencies in these assays correlated with the lipophilicity of substituents. The N-phenyl derivative was more potent and equally effective to imexon, a cyclized 2-cyanoaziridine-1-carboxamide of clinical interest, against cloned fresh human tumors.
Chemical Basis for the Biological Activity of Imexon and Related Cyanoaziridines
作者:Bhashyam S. Iyengar、Robert T. Dorr、William A. Remers
DOI:10.1021/jm030225v
日期:2004.1.1
Chemical aspects of mode of action of imexon and related cyanoaziridines were studied. These compounds do not alkylate DNA nor react with the is an element of-amino groups of L-lysine, despite the presence of an aziridine ring. They do react readily with biologically important sulfhydryl compounds to give products derived from either aziridine ring opening, interaction with the cyano group of cyanoaziridines, or opening of the iminopyrrolidone ring of imexon. The products from reactions of imexon and related cyanoaziridines with thiols are not as potent as their parent compounds against tumor cells. These results are consistent with biological studies that show that the mechanism of cytotoxicity involves thiol depletion followed by oxidative stress leading to apoptosis.