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The work assesses the performance of nanocarriers from amphiphilic block copolymers with functional azobenzene or coumarin moieties for delivery of paclitaxel. Placlitaxel was encapsulated by the nanoprecipitation method. Characterisations were performed by DLS, TEM, Zeta potential and HPLC. Cell viability was investigated in HeLa and Huh-5-2-cell lines. Coumarin-containing polymeric micelles ( D h= 26   ±   2   nm, PDI   =   0.28, ζ = ‒22.9   ±   3.6   mV) with 11.2   ±   0.5%w/w drug loading showed enhanced cytotoxicity in HeLa cells (IC50   &lt;   0.02   nM) compared to free paclitaxel (IC50   =   0.17   ±   0.02   nM). Azobenzene-containing polymeric vesicles ( D h= 390   ±   20   nm, PDI   =   0.24, ζ = ‒33.2   ±   5.0   mV) with a 6.8   ±   0.4%w/w drug loading showed increased cytotoxicity under 530   nm light (IC50   =   0.0114   ±   0.00033   nM) in HeLa cells due to a stimulated delivery of paclitaxel. Effectivity of these block copolymers as paclitaxel nanovectors and light stimulated release has been demonstrated.

journal of microencapsulation

Evaluation of PEG- b -polycarbonates self-assemblies containing azobenzene or coumarin moieties as nanocarriers using paclitaxel as a model hydrophobic drug