Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5271112 | Tetrahedron Letters | 2014 | 4 Pages |
â¢Polytheonamide B is an ion channel forming peptide that displays potent cytotoxicity.â¢Dansylated polytheonamide mimic was designed as its simplified analogue.â¢The three analogues of the mimic were synthesized and biologically evaluated.â¢A 10-fold enhancement in the cytotoxicity was attained by increasing the log P value.â¢The data provide new understanding for the functional control of the ion channel.
We demonstrate that the cytotoxicity of dansylated polytheonamide mimic (2) is controlled by chemical modification of its N-terminal structure. Dansylated polytheonamide mimic (2) is an ion channel peptide which displays potent cytotoxicity against P388 mouse leukemia cells (IC50Â =Â 12Â nM). To modulate its cytotoxicity, three analogues of 2, possessing distinct N-terminal structures with different hydrophobicities, were synthesized and their cytotoxicities were evaluated. This focused structure-activity relationship study unveiled that the cytotoxicity of 2 is enhanced 10-fold by simply changing its N-terminal 5,5-dimethyl-2-oxohexanamide to the more hydrophobic palmitamide. The data obtained here provide new understanding for the functional control of the artificial ion channel peptide 2.
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