Abstract
The interaction between doxorubicin (DOX), an anthracycline antibiotic frequently used in chemotherapy, and zwitterionic dipalmitoylphosphatidylcholine (DPPC) was investigated using Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), and rheological measurements. FTIR results showed that DOX shifted the wavenumber of the PO2 − band for pure DPPC to a higher wavenumber. This may have been because of the strong interactions between the NH3 + group in DOX and the phosphate (PO2 −) group in the polar head of DPPC. The main transition temperature of DPPC liposomes was slightly shifted to a lower temperature for DPPC liposome-encapsulated DOX. This suggested that DOX had a significant effect on the acyl chains in the DPPC bilayers, and that its presence decreased the transition cooperativity of lipid acyl chains. There was also the appearance of an additional transition peak at nearly 136°C for the DPPC/DOX sample. These interactions between DOX and DPPC phospholipid would cause a decrease in the DPPC liposomes plastic viscosity and increase membrane fluidity. A better understanding of the interactions between DOX and lipid bilayers could help in the design and development of improved liposomal drug delivery systems.
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Mady, M.M., Shafaa, M.W., Abbase, E.R. et al. Interaction of Doxorubicin and Dipalmitoylphosphatidylcholine Liposomes. Cell Biochem Biophys 62, 481–486 (2012). https://doi.org/10.1007/s12013-011-9334-x
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DOI: https://doi.org/10.1007/s12013-011-9334-x