Poly(hydroxybutyrate-co-hydroxyvalerate) Microspheres for the Encapsulation and Controlled Release of Heparin

Alexandre Monnier Nida Sheibat-Othman 1 J.-M. Chenal 2 Amilton Martins Santos Hatem Fessi 1
1 LAGEP - Laboratoire d'automatique et de génie des procédés
2 MATEIS - Matériaux, ingénierie et science [Villeurbanne]
Abstract : The water-in-oil-in-water double emulsion followed by solvent extraction and evaporation method was used to encapsulate heparin in poly(hydroxybutyrate-co-hydroxyvalerate) (PHB-HV) microspheres to provide sustained heparin release. The impact of the polymer molecular weight and formulation parameters on the microspheres' morphology, encapsulation efficiency and release is studied and physical interpretations were provided, by relating the polymer precipitation time and hardening of the microspheres to the viscosity of the organic phase, solvent extraction time and pores and microspheres sizes. High molecular weight PHB-HV allowed a convenient encapsulation of heparin, with a modulation of the encapsulation efficiency and release rate by changing the formulation parameters. Heparin release was found to be gradual over seven days with low burst effect. After release, large microspheres having visible porosity on their surface became flattened whereas small smooth microspheres remained unchanged. On the contrary, the structure of low molecular weight microspheres was completely deformed after 7 days in phosphate buffer due to the lack of mechanical properties.
Keywords : Poly(hydroxybutyrate-co-hydroxyvalerate) Microspheres Heparin Double Emulsion-Solvent Evaporation Molecular Weight
Document type :
Journal articles
Liste complète des métadonnées
https://hal.archives-ouvertes.fr/hal-01814068
Contributor : Laboratoire Mateis <>
Submitted on : Tuesday, June 12, 2018 - 5:57:05 PM
Last modification on : Sunday, April 14, 2019 - 3:45:19 PM

Identifiers

Collections

LAGEP | UNIV-LYON1 | INSA-LYON | INSA-GROUPE | GEPHARM

Citation

Alexandre Monnier, Nida Sheibat-Othman, J.-M. Chenal, Amilton Martins Santos, Hatem Fessi. Poly(hydroxybutyrate-co-hydroxyvalerate) Microspheres for the Encapsulation and Controlled Release of Heparin. Journal of Colloid Science and Biotechnology, 2016, 5 (1, SI), pp.100-108. ⟨10.1166/jcsb.2016.1133⟩. ⟨hal-01814068⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

31

Contact

support.ccsd.cnrs.fr
hal.support@ccsd.cnrs.fr
Logo CCSD