Hemijska industrija 2016 Volume 70, Issue 1, Pages: 49-58
https://doi.org/10.2298/HEMIND141119010V
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Encapsulation of α-lipoic acid intochitosan and alginate/gelatin hydrogel microparticles and its in vitro antioxidant activity
Vidović Bojana B. (Faculty of Pharmacy, Belgrade)
Milašinović Nikola Z. (The Academy of Criminalistic and Police Studies, Belgrade + Faculty of Technology and Metallurgy, Innovation Center, Belgrade)
Kotur-Stevuljević Jelena M. (Faculty of Pharmacy, Belgrade)
Dilber Sanda P. (Faculty of Pharmacy, Belgrade)
Kalagasidis-Krušić Melina T. (Faculty of Technology and Metallurgy, Belgrade)
Đorđević Brižita I. (Faculty of Pharmacy, Belgrade)
Knežević-Jugović Zorica D. (Faculty of Technology and Metallurgy, Belgrade)
Alpha-lipoic acidis an organosulphur compound well-known for its therapeutic
potential and antioxidant properties. However, the effective use of α-lipoic
acid depends on biological plasma half-life and its preserving stability,
which could be improved by encapsulation. In this study, α-lipoic acid was
incorporated into chitosan microparticles obtained by reverse emulsion
crosslinking technique, as well as into microparticles of alginate/gelatin
crosslinked with zinc ions. Encapsulation of α-lipoic acid in both cases was
carried out by swelling of synthesized dried microparticles by their dipping
in a solution of the active substance under strictly controlled conditions.
Encapsulation efficiency of α-lipoic acid obtained in this study was up to
53.9 %. The structural interaction of α-lipoic acid with the carriers was
revealed by Fourier transform infrared spectroscopy. In vitro released
studies showed that controlled release of α-lipoic acid was achieved through
its encapsulation into chitosan microparticles. The results of in vitro
antioxidative activity assays of released α-lipoic acid indicated that
antioxidant activity was preserved at a satisfactory level. These obtained
results suggested that chitosan microparticles could be suitable for modeling
the controlled release of α-lipoic acid.
Keywords: alpha-lipoic acid, microparticles, chitosan, sodiumal ginate/gelatin, antioxidant activity
Projekat Ministartsva nauke
Republike Srbije, br. III 46010 i br. III46001