Abstract
Ultrasound-mediated delivery has garnered attention as a noninvasive modality for localized drug delivery in cancer. Doxorubicin, a chemotherapeutic drug, shows low penetration, nonspecific distribution, and uncontrolled release. We have synthesized a hydrophobic doxorubicin (hDox)-loaded palmitoyl-modified glycol chitosan amphiphile (PmGCA) polymer-based nanotheranostic drug delivery system (hDox-NDS) for ultrasound (US)-mediated release. PmGCA encapsulates 210 μg/mL hDox in 90 ± 15 nm cationic micelles. The reappearance of the Dox fluorescence peak after 2 MHz US exposure confirms the encapsulated drug release.
hDox-NDS display a considerable drug release (~30 to 50%) over 72 h, following the Weibull model. Fluorescence microscopy shows a higher uptake of hDox-NDS (~10%) in rhabdomyosarcoma (RD) cells compared to DoxHCl. Ultrasound exposure significantly (p < 0.001) enhances the anticancer effect of hDox-NDS on RD cells, as shown by its lower IC50 value of 1.7 ± 0.05 μM compared to that of DoxHCl (2.62 ± 1.2 μM). In vivo optical imaging shows significantly lower fluorescence in the heart (~84%) and liver (~59%) compared to DoxHCl, thereby reducing side effects. This nanotheranostic hDox-NDS has been considered an effective drug delivery system, offering enhanced therapeutic effects in cancer treatment.
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Acknowledgements
Chemicals and equipment used in the research work are supported through the PAK-NORWAY Institutional Cooperation Program, PK3004, COMSTECH-TWAS (12-198 RG/PHA/AS_C-UNESCO FR: 3240270874), and Pakistan Science Foundation (PSF/Res/C-NILOP/Med (330). The authors are grateful to the Pakistan Institute of Applied Sciences (PIEAS) and the National Institute of Health (NIH) for technical support.
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Saeed, S., Sarwar, U., Yasinzai, M. et al. Glycol chitosan amphiphile nanotheranostic system for ultrasound-mediated localized release and biodistribution of doxorubicin. J Nanopart Res 25, 194 (2023). https://doi.org/10.1007/s11051-023-05835-x
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DOI: https://doi.org/10.1007/s11051-023-05835-x