Biodegradable and complexed microspheres used for sustained delivery and activity protection of SOD

Journal of Biomedical Materials Research. Part B, Applied Biomaterials
Ye WangWen-Quan Liang

Abstract

To develop a new protein delivery system for superoxide dismutase (SOD), biodegradable materials like poly(DL-lactide-co-glycolide) (PLGA), alginate, and chitosan were used for preparing PLGA microspheres and alginate-chitosan microspheres, which were used for encapsulating protein. Alginate-chitosan microspheres showed much higher entrapment efficiency (91.08% +/- 1.28%) than that of PLGA microspheres (36.42% +/- 1.81%). In vitro release study showed that SOD presented a sustained release character in the preparation of these biodegradable materials. After 15 days, 43.72% +/- 0.43% of protein was released from alginate-chitosan microspheres, while there was 62.96% +/- 3.95% of protein release from PLGA microspheres. However, alginate-chitosan demonstrated that it was a better material to control the burst release of protein from microspheres. Furthermore, SOD activity in microspheres was evaluated, and the results showed that microspheres protected the activity of protein to some extent. Finally, PLGA-alginate-chitosan complex microspheres were constructed and the release character in vitro demonstrated that this preparation could not only prolong the release of drug but also decrease the burst release.

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Citations

Jun 28, 2011·European Journal of Pharmaceutical Sciences : Official Journal of the European Federation for Pharmaceutical Sciences·Elena MataRosa M Hernández
Sep 15, 2007·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Cai-Hong ZhengWen-Quan Liang
Nov 27, 2020·International Journal of Biological Macromolecules·Arianna Carolina RosaFranco Dosio

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