JOURNAL OF CHILEAN CHEMICAL SOCIETY

Vol 61 No 4 (2016): Journal of the Chilean Chemical Society
Original Research Papers

EFFECT OF GAMMA-IRRADIATION ON BIODEGRADABLE MICROSPHERES LOADED WITH RASAGILINE MESYLATE

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  • Marcos Fernández,
  • Emilia Barcia,
  • Sofía Negro
Marcos Fernández
Department of Pharmaceutics, Faculty of Pharmacy, Complutense University of Madrid Department of Pharmacy, Faculty of Pharmacy, University of Concepción
Emilia Barcia
Department of Pharmaceutics, Faculty of Pharmacy, Complutense University of Madrid
Sofía Negro
Department of Pharmaceutics, Faculty of Pharmacy, Complutense University of Madrid
Published May 29, 2017
Keywords
  • Gamma-irradiation,
  • Microspheres,
  • PLGA,
  • Rasagiline mesylate,
  • Parkinson’s disease
How to Cite
Fernández, M., Barcia, E., & Negro, S. (2017). EFFECT OF GAMMA-IRRADIATION ON BIODEGRADABLE MICROSPHERES LOADED WITH RASAGILINE MESYLATE. Journal of the Chilean Chemical Society, 61(4). Retrieved from https://jcchems.com/index.php/JCCHEMS/article/view/105

Copyright (c) 2017 Marcos Fernández, Emilia Barcia, Sofía Negro

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Abstract

In the present study, the influence of gamma-irradiation was evaluated on the physicochemical characteristics and in vitro release of rasagiline mesylate (RM), a selective MAO-B inhibitor used in Parkinson’s disease, from poly(D,L-lactide-co-glycolide) (PLGA) microspheres. Microspheres were prepared using PLGA 50:50 by the solvent evaporation technique (O/W emulsion). Microspheres were sterilized by gamma-irradiation and their influence was assessed by scanning electron microscopy (SEM), laser light diffraction, differential scanning calorimetry (DSC), X-ray diffraction (XRD), gel permeation chromatography (GPC), encapsulation efficiency (EE) and in vitro drug release. Gamma-irradiation of RM-loaded microspheres did not affect EE, DSC and XRD patterns. After gamma-irradiation, changes on the surface were observed by SEM, but no significant difference in mean particle size was observed. GPC measurements showed a decrease in molecular weight of the polymer after five days of in vitro release. The similarity factor value between irradiated and non-irradiates microspheres was <50, indicating the non-similarity of the release profiles. The sterilization technique had an effect on the integrity of polymeric system, significantly affecting in vitro release of RM from PLGA microspheres. Therefore, from our results we conclude that gamma-irradiation is not a suitable sterilization procedure for this formulation.

 

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