The synthesis of novel polyamine–nitroimidazole conjugates designed to probe the structural specificities of the polyamine uptake system in A549 lung carcinoma cells
The synthesis of novel polyamine–nitroimidazole conjugates designed to probe the structural specificities of the polyamine uptake system in A549 lung carcinoma cells
The synthesis of novel polyamine–nitroimidazole conjugates designed to probe the structural specificities of the polyamine uptake system in A549 lung carcinoma cells
作者:Adam Q. Siddiqui、Louise Merson-Davies、Paul M. Cullis
DOI:10.1039/a903293b
日期:——
Synthetic routes were developed to synthesise an N
4-mono-derivatised spermidineânitroimidazole conjugate and two novel structural isomers (N
1- and N
8-spermidineânitroimidazole conjugates). A synthetic method was developed to synthesise an N
1,N
7-bis-derivatised norspermidineânitroimidazole conjugate and further applied to the synthesis of an N
1,N
8-bis-derivatised spermidineânitroimidazole conjugate. The compounds were examined for their ability to serve as substrates for the polyamine uptake system in A549 lung carcinoma cells, by measuring their inhibition of [14C]spermidine uptake. Marked differences were observed between the nitroimidazoleâpolyamine conjugates. For maximum recognition as a substrate by the polyamine transport system, the aminobutyl unit of spermidine should remain underivatised. The preferred site(s) for spermidine amino derivatisation was in the order: N
1Â >Â N
8 â N
1, N
8Â >Â N
4.