alexa Abstract | Development and characterization of polymeric microspheres for controlled release protein loaded drug delivery system

Indian Journal of Pharmaceutical Sciences
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Research Paper Open Access

Abstract

The aim of the present work was to investigate the preparation of microspheres as potential drug carriers for proteins, intended for controlled release formulation. The hydrophilic bovine serum albumin was chosen as a model protein to be encapsulated within poly(D,L-lactide-co-glycolide) (50:50) microspheres using a w/o/w double emulsion solvent evaporation method. Different parameters influencing the particle size, entrapment efficiency and in vitro release profiles were investigated. The microspheres prepared with different molecular weight and hydrophilicity of poly(D,L-lactide-co-glycolide) polymers were non porous, smooth surfaced and spherical in structure under scanning electron microscope with a mean particle size ranging from 3.98 to 8.74 µm. The protein loading efficiency varied from 40 to 71% of the theoretical amount incorporated. The in vitro release profile of bovine serum albumin from microspheres presented two phases, initial burst release phase due to the protein adsorbed on the microsphere surface, followed by slower and continuous release phase corresponding to the protein entrapped in polymer matrix. The release rate was fairly constant after an initial burst release. Consequently, these microspheres can be proposed as new controlled release protein delivery system.

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Author(s): S Ravi KK Peh Yusrida Darwis B Krishna Murthy T Raghu Raj Singh C Mallikarjun

Keywords

Bovine serum albumin, poly(D,L-lactide-co-glycolide), w/o/w double emulsion, microspheres, in vitro release

 
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