Journal of Polymer & Composites Original Research
Engineering of PEG-b-PCL/Pluronic F127 Polymeric Composite Micelles for Controlled Co-Delivery of Docetaxel and Curcumin in Prostate Cancer Therapy
Abstract
Polymeric composite nanocarriers made from amphiphilic block copolymers are popular for their customisable architecture, self-assembly behaviour, and drug release control. A PEG-b-PCL/Pluronic F127 micellar composite was developed and tested as a multifunctional nanocarrier for docetaxel and curcumin administration.
The amphiphilic block copolymers Pluronic® F127 and PEG-b-PCL were employed to generate polymeric micelles using solvent evaporation-assisted self-assembly. The optimised polymer composite showed good colloidal stability and uniform size distribution with a zeta potential of -21.4 ± 2.1 mV, polydispersity index of 0.172 ± 0.014, and particle size of 118.6 ± 4.3 nm. Both DTX and CUR achieved encapsulation efficiencies of 91.8 ± 2.4% and 88.5 ± 1.9%, respectively.The polymeric core successfully contained both drugs, resulting in an amorphous distribution within the matrix, as confirmed by FTIR, DSC, and XRD examinations. The micellar composite showed sustained and pH-responsive drug release, with DTX release of 82.9 ± 2.8% and CUR of 82.7 ± 3.1% over 72 hours at pH 5.5. A 3.8-fold increase in intracellular drug accumulation was seen in PC-3 prostate cancer cells compared to free medicines. The co-loaded micelles showed greater cytotoxicity, as indicated by an IC50 value of 1.84 ± 0.12 µg/mL. Low systemic toxicity and 74.3% tumour inhibition were seen in in vivo tests on mice with tumours. Results indicate that the PEG-b-PCL/Pluronic F127 polymeric composite is promising as a prostate cancer nanocarrier.
Keywords
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