| Title | Protein-loaded microspheres prepared by sequential adsorption of dextran sulphate and protamine on melamine formaldehyde core. | | Author(s) | Balabushevich NG, Larionova NI | | Institution | Chemistry Department, Lomonosov Moscow State University, Moscow, Russia. | | Source | J Microencapsul 2009 Nov; 26(7):571-9. | | Abstract | Polyelectrolyte multilayer microspheres were fabricated by layer-by-layer self-assembly of a dextran sulphate and a protamine on melamine formaldehyde cores, followed by the partial decomposition of the core. Effects of pH on the encapsulation of proteins and enzymes with different physico-chemical properties (insulin, aprotinin, peroxidase, glucose oxidase (GOD), catalase (Cat)) in the prepared microspheres were then studied. This method of protein encapsulation demonstrated a high loading capacity and efficiency. The protein incorporation and release was regulated by the pH of the solution. Encapsulated enzymes retained a high specific activity depending on the amount of protein incorporated. Bienzyme system GOD/Cat immobilized in the microspheres was suitable for the glucose content assay. | | Language | eng | | Pub Type(s) | Journal Article
| | PubMed ID | 19839792 |
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