Biologically active spermidine analogues, pharmaceutical compositions and methods of treatment
申请人:——
公开号:US20020045780A1
公开(公告)日:2002-04-18
Polyamines having the formula:
1
or a salt thereof with a pharmaceutically acceptable acid wherein: R
1
-R
5
may be the same or different and are alkyl, aryl, aryl alkyl, cycloalkyl or hydrogen; at least one of R
1
and R
2
and at least one of R
4
and R
5
are not hydrogen, and any of the alkyl chains may optionally be interrupted by at least one etheric oxygen atom, excluding N
1
,N
3
-diethylspermidine and N
1
,N
3
-dipropylspermidine; and
A and B are bridging groups which effectively maintain the distance between the nitrogen atoms such that the polyamine: (i) is capable of uptake by a target cell upon administration of the polyamine to a human or non-human animal; and (ii) upon uptake by the target cell, competitively binds via an electrostatic interaction between the positively charged nitrogen atoms to substantially the same biological counter-anions as the intracellular natural polyamines in the target cell.