Abstract
In this study, the controlled synthesis of microcarriers and CpE loading were aimed to achieve by microfluidic system. The effect of temperature on chitosan in the stabilization of silver nanoparticles, microcarrier size and the encapsulation efficiency was measured. Encapsulation was achieved by the controlled rapid mixing in polymethyl-methacrylate (PMMA) microfluidic chip. The CpE was found to contain primary and secondary phenols in the phytochemical screening. The capping property of chitosan was achieved by heating reaction mixture in polytetrafluoroethylene (PTFE) tube to get the stabilized silver nanoparticles which were found to be embedded in chitosan microspheres of size 23.7 µm on average. Fourier-transform infrared (FTIR) and ultraviolet–visible (UV–Vis) spectroscopy results indicated the successful encapsulation of CpE in microcarriers. The average percentage encapsulation efficiency (% EE) of CsAg was found to be 77.125 ± 6.9%. The CpE-loaded microcarriers had shown significant anti-oxidant activity (p < 0.01). CpE-loaded microcarriers were evaluated to have robust cytotoxicity against 4T1 breast cancer cells at very low dose (IC50 = 42.53 µg/mL), which inhibited 95% of cancer cells viability. These results confer that microfluidic system plays an important role in the formation of CpE-loaded CsAg microcarriers that could effectively (p < 0.0001) kill the breast cancer cells.
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Acknowledgements
This research is supported by Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad, Pakistan. Authors are grateful to Mr. Asghar Ali and Mr. Islam Khattak for providing technical support in various stages of research. We extend our heartful thanks to Engr. Usman Aftab for his significant assistance in proofreading of this research. We are also thankful to Malik Ihsanullah Khan from Division of Molecular Medicine (USTC) for helping in preparation of plant extract and its phytochemical analysis. The authors would like to pay a special thanks to University of Science and Technology of China for providing chitosan (CAS: 9012-76-4, Sigma).
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Aftab, A., Bashir, S., Rafique, S. et al. Microfluidic platform for encapsulation of plant extract in chitosan microcarriers embedding silver nanoparticles for breast cancer cells. Appl Nanosci 10, 2281–2293 (2020). https://doi.org/10.1007/s13204-020-01433-8
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DOI: https://doi.org/10.1007/s13204-020-01433-8