Abstract
The kinetics of degradation and sustained cancer drugs (paclitaxel (PT) and prodigiosin (PG)) release are presented for minirods (each with diameter of ~5 and ~6 mm thick). Drug release and degradation mechanisms were studied from solvent-casted cancer drug-based minirods under in vitro conditions in phosphate buffer solution (PBS) at a pH of 7.4. The immersed minirods were mechanically agitated at 60 revolutions per minute (rpm) under incubation at 37 °C throughout the period of the study. The kinetics of drug release was studied using ultraviolet visible spectrometry (UV-Vis). This was used to determine the amount of drug released at 535 nm for poly(lactic-co-glycolic acid) loaded with prodigiosin (PLGA-PG) samples, and at 210 nm, for paclitaxel-loaded samples (PLGA-PT). The degradation characteristics of PLGA-PG and PLGA-PT are elucidated using optical microscope as well as scanning electron microscope (SEM). Statistical analysis of drug release and degradation mechanisms of PLGA-based minirods were performed. The implications of the results are discussed for potential applications in implantable/degradable structures for multi-pulse cancer drug delivery.
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Acknowledgements
The authors are very grateful to the World Bank African Centres of Excellent Project (Pan-African Materials Institute (PAMI) with grant No. P126974), the African Capacity Building Foundation with Grant No. 292, Princeton University School of Engineering and Applied Sciences (SEAS) and the Worcester Polytechnic Institute for financial support. The authors are also grateful to the Nelson Mandela Institute (NMI) and the African University of Science and Technology (AUST) for the scholarships given to the students. Appreciation is also extended to Prof. Eric Garfunkel and Dr. Adeoye Soyemi for useful technical discussions.
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Danyuo, Y., E. Oberaifo, O., Obayemi, J.D. et al. Extended pulsated drug release from PLGA-based minirods. J Mater Sci: Mater Med 28, 61 (2017). https://doi.org/10.1007/s10856-017-5866-y
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DOI: https://doi.org/10.1007/s10856-017-5866-y