Abstract
A model is developed for the effect of ionic polymers on the transport of doxorubicin, an antitumor drug, through a bilayer membrane. Accordingly, a protonated (cationic) form of doxorubicin binds to an anionic polymer, poly(acrylic acid), the resulting complex being several hundred nanometers in size. Nevertheless, large complex species associate with neutral egg lecithin liposomes by means of hydrophobic attraction between the doxorubicin and the liposome bilayer. Then, the doxorubicin enters the liposome interior which has been imparted with an acidic buffer to protonate the doxorubicin. The rate of transmembrane Dox permeation decreases when elevating the polyacid-to-doxorubicin ratio. A cationic polymer, polylysine, being coupled with liposomes containing the negative lipid cardiolipin, accelerates membrane transport of doxorubicin with the maximum rate at a complete neutralization of the membrane charge by an interacting polycation. The effect of a polycation on doxorubicin transport becomes more pronounced as small negative liposomes (60–80 nm in diameter) are changed to larger ones (approx. 600 nm in diameter). An opportunity thus opens up for the manipulation of the kinetics of drug uptake by cells and, ultimately, the control of the pharmaceutical action of drugs.
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Yaroslavov, A., Kitaeva, M., Melik-Nubarov, N., Menger, F. (2008). Polyelectrolyte-Mediated Transport of Doxorubicin Through the Bilayer Lipid Membrane. In: Giersig, M., Khomutov, G.B. (eds) Nanomaterials for Application in Medicine and Biology. NATO Science for Peace and Security Series. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6829-4_13
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