© The Institution of Engineering and Technology
Small molecule-based amphiphiles self-assemble into nanostructures (micelles) in aqueous medium which are currently being explored as novel drug delivery systems. Here, naproxen-polyethylene glycol (N-PEG), a small molecule-derived amphiphile, has been synthesised, characterised and evaluated as hydrophobic drug carrier. 1H, 13C Nuclear magnetic resonance (NMR), mass spectrometry (MS) and Fourier-transform infrared spectroscopy (FTIR) confirmed the formation of N-PEG and dynamic light scattering (DLS) revealed the formation of nano-sized structures of ∼228 nm. Transmission electron microscope (TEM) analysis showed aggregation behaviour of the structures with average size of ∼230 nm. Biodegradability aspect of the micellar-structured N-PEG was demonstrated by lipase-mediated degradation studies using DLS and TEM. High encapsulation efficiency followed by release in a sustained manner of a well-known anticancer drug, doxorubicin, demonstrated the feasibility of the new drug delivery system. These results advocate the promising potential of N-PEG micelles as efficient drug delivery system for specific delivery to cancerous cells in vitro and in vivo.
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