title: Fabrication of microparticle protein delivery systems based on calcium alginate.
abstract: Microparticle protein delivery systems based on calcium alginate were fabricated using a very convenient method, i.e. directly shredding the protein-loaded calcium alginate beads into microparticles in a commercial food processor for 3 min. Bovine serum albumin (BSA) as a model protein was encapsulated in the calcium alginate microparticles. The obtained protein-loaded microparticles were then coated with chitosan. This fabrication method offered high encapsulation efficiency and a high particle yield. Compared with beads, the microparticles exhibited a faster release rate in the initial release stage. By comparing the release profiles of uncoated beads/microparticles and chitosan-coated beads/microparticles, it was found that the releases from chitosan-coated beads/microparticles were slower. To examine whether the loaded protein denatured during the microparticle fabrication, trypsin was encapsulated in the calcium alginate microparticles and the bioactivity of trypsin released from the microparticles was measured.
authors.affiliation: Key Laboratory of Biomedical Polymers of Ministry of Education, Department of Chemistry, Wuhan University, Wuhan, PR China.
authors.forename: Cui-Yun
authors.initials: CY
authors.lastname: Yu
authors.forename: Li-Hui
authors.initials: LH
authors.lastname: Jia
authors.forename: Si-Xue
authors.initials: SX
authors.lastname: Cheng
authors.forename: Xian-Zheng
authors.initials: XZ
authors.lastname: Zhang
authors.forename: Ren-Xi
authors.initials: RX
authors.lastname: Zhuo
mesh_terms: D000464:Alginates / Q000737:chemistry*; D000818:Animals; D002417:Cattle; D048271:Chitosan / Q000737:chemistry; D003692:Delayed-Action Preparations / Q000737:chemistry*; D004339:Drug Compounding / Q000191:economics / Q000379:methods*; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D010316:Particle Size; D012710:Serum Albumin, Bovine / Q000008:administration & dosage*
chemical_list: D000464:Alginates; D003692:Delayed-Action Preparations; D006603:Hexuronic Acids; D012710:Serum Albumin, Bovine; D020723:Glucuronic Acid; D048271:Chitosan