Abstract
Naturally occurring 3-alkylpyridinium polymers from the marine sponge Reniera sarai are membrane-active compounds exerting a selective cytotoxicity towards non small cell lung cancer cells, and stable transfection of nucleated mammalian cells. In view of their possible use as chemotherapeutics and/or transfection tools, three poly-APS based synthetic compounds were tested on their activity using natural and artificial lipid membranes. The tested compounds were found to be very stable over a wide range of temperature, ionic strength, and pH, and to prefer the solid-ordered membrane state. Their membrane-damaging activity increases with the length of their alkyl chains and the degree of polymerization.
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