The aim of this study was to investigate the encapsulation of a-lipoic acid (LA) onto chitosan microbeads in order to achieve a sustained release. Microbeads of different compositions were synthetized by inverse emulsion method, and characterized by in vitro swelling and drug release studies, FT-IR, DSC and SEM analyses. The encapsulation of LA was performed by swelling of previously synthetized dry microbeads in LA solution. The encapsulation efficiency was determined in terms of LA concentration, using liquid chromatography tandem mass spectrometry (LC-MS/MS). The swelling of synthetized microbeads was well pronounced in the acidic media. FT-IR analysis confirmed the presence of LA in microbeads and its interactions with matrices, which was in agreement with the results revealed by DSC analysis. SEM analysis revealed the porous structure, micron-size and spherical shape of the synthetized beads. Encapsulation efficiency was in the range from 46.8 to 58.5% depending on the hydrogel co...mposition. The microbeads exhibited sustained release of LA under conditions mimicking gastrointestinal tract. Results of antioxidant activity of released LA showed good correlation with the concentration of the released LA. The obtained results suggested that synthetized microbeads have promising potential for oral administration with reduced dosing frequency in comparison to the immediate release formulations.
TY - JOUR
AU - Milašinović, Nikola
AU - Calija, Bojan
AU - Vidović, Bojana
AU - Crevar-Sakač, Milkica
AU - Vujić, Zorica
AU - Knežević-Jugović, Zorica
PY - 2016
UR - http://jakov.kpu.edu.rs/handle/123456789/735
AB - The aim of this study was to investigate the encapsulation of a-lipoic acid (LA) onto chitosan microbeads in order to achieve a sustained release. Microbeads of different compositions were synthetized by inverse emulsion method, and characterized by in vitro swelling and drug release studies, FT-IR, DSC and SEM analyses. The encapsulation of LA was performed by swelling of previously synthetized dry microbeads in LA solution. The encapsulation efficiency was determined in terms of LA concentration, using liquid chromatography tandem mass spectrometry (LC-MS/MS). The swelling of synthetized microbeads was well pronounced in the acidic media. FT-IR analysis confirmed the presence of LA in microbeads and its interactions with matrices, which was in agreement with the results revealed by DSC analysis. SEM analysis revealed the porous structure, micron-size and spherical shape of the synthetized beads. Encapsulation efficiency was in the range from 46.8 to 58.5% depending on the hydrogel composition. The microbeads exhibited sustained release of LA under conditions mimicking gastrointestinal tract. Results of antioxidant activity of released LA showed good correlation with the concentration of the released LA. The obtained results suggested that synthetized microbeads have promising potential for oral administration with reduced dosing frequency in comparison to the immediate release formulations.
PB - Elsevier Science Bv, Amsterdam
T2 - Journal of the Taiwan institute of chemical engineers
T1 - Sustained release of alpha-lipoic acid from chitosan microbeads synthetized by inverse emulsion method
VL - 60
SP - 106
EP - 112
DO - 10.1016/j.jtice.2015.10.037
ER -
@article{
author = "Milašinović, Nikola and Calija, Bojan and Vidović, Bojana and Crevar-Sakač, Milkica and Vujić, Zorica and Knežević-Jugović, Zorica",
year = "2016",
url = "http://jakov.kpu.edu.rs/handle/123456789/735",
abstract = "The aim of this study was to investigate the encapsulation of a-lipoic acid (LA) onto chitosan microbeads in order to achieve a sustained release. Microbeads of different compositions were synthetized by inverse emulsion method, and characterized by in vitro swelling and drug release studies, FT-IR, DSC and SEM analyses. The encapsulation of LA was performed by swelling of previously synthetized dry microbeads in LA solution. The encapsulation efficiency was determined in terms of LA concentration, using liquid chromatography tandem mass spectrometry (LC-MS/MS). The swelling of synthetized microbeads was well pronounced in the acidic media. FT-IR analysis confirmed the presence of LA in microbeads and its interactions with matrices, which was in agreement with the results revealed by DSC analysis. SEM analysis revealed the porous structure, micron-size and spherical shape of the synthetized beads. Encapsulation efficiency was in the range from 46.8 to 58.5% depending on the hydrogel composition. The microbeads exhibited sustained release of LA under conditions mimicking gastrointestinal tract. Results of antioxidant activity of released LA showed good correlation with the concentration of the released LA. The obtained results suggested that synthetized microbeads have promising potential for oral administration with reduced dosing frequency in comparison to the immediate release formulations.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of the Taiwan institute of chemical engineers",
title = "Sustained release of alpha-lipoic acid from chitosan microbeads synthetized by inverse emulsion method",
volume = "60",
pages = "106-112",
doi = "10.1016/j.jtice.2015.10.037"
}
Milašinović, N., Calija, B., Vidović, B., Crevar-Sakač, M., Vujić, Z.,& Knežević-Jugović, Z. (2016). Sustained release of alpha-lipoic acid from chitosan microbeads synthetized by inverse emulsion method.
Journal of the Taiwan institute of chemical engineers
Elsevier Science Bv, Amsterdam., 60, 106-112.
https://doi.org/10.1016/j.jtice.2015.10.037
Milašinović N, Calija B, Vidović B, Crevar-Sakač M, Vujić Z, Knežević-Jugović Z. Sustained release of alpha-lipoic acid from chitosan microbeads synthetized by inverse emulsion method. Journal of the Taiwan institute of chemical engineers. 2016;60:106-112
Milašinović Nikola, Calija Bojan, Vidović Bojana, Crevar-Sakač Milkica, Vujić Zorica, Knežević-Jugović Zorica, "Sustained release of alpha-lipoic acid from chitosan microbeads synthetized by inverse emulsion method" Journal of the Taiwan institute of chemical engineers, 60 (2016):106-112,
https://doi.org/10.1016/j.jtice.2015.10.037 .
