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The Release of Albumin from PLGA and PCL Wafers Containing Natural and Synthetic Additives for Protein Delivery  

Hyun Hoon (Department of Polymer Nano Science and Technology, Chonbuk National University)
Lee Jae Ho (Department of Polymer Nano Science and Technology, Chonbuk National University)
Seo Kwang Su (Nanobiomaterials Laboratories, Korea Research Institute of Chemical Technology)
Kim Moon Suk (Nanobiomaterials Laboratories, Korea Research Institute of Chemical Technology)
Rhee Jhon M. (Department of Polymer Nano Science and Technology, Chonbuk National University)
Lee Hai Bang (Nanobiomaterials Laboratories, Korea Research Institute of Chemical Technology)
Khang Gilson (Department of Polymer Nano Science and Technology, Chonbuk National University)
Publication Information
Polymer(Korea) / v.29, no.5, 2005 , pp. 468-474 More about this Journal
Abstract
PLGA and PCL copolymers initiated by carbitol as drug carriers were synthesized by ring-opening polymerization of L-lactide (LA), glycolide (GA), and $\varepsilon-caprolactone(\varepsilon-CL)$. Implantable wafers were simply fabricated by direct compression method after physical mixing of copolymers and bovine serum albumin-fluorescein isothiocyanate (BSA-FITC) as a model protein drug. The release amounts of BSA-FITC from wafers were determined by fluorescence intensity using the fluorescence spectrophotometer. Also, the release behavior of BSA-FITC on wafers was controlled by adding the additives such as collagen, small intestinal submucosa (SIS), poly(vinyl pyrrolidone) (PVP), and poly(thylene glycol) (PEG). The wafer prepared by PLGA and PCL exhibited slow release within $10\%$ for 30 days. But, those prepared by a variety of additives exhibited the controlled BSA release patterns with a dependence on the additive contents. furthermore, the wafers containing natural materials such as collagen and SIS showed more zero-order release profile than that with synthetic materials such as PVP and PEG. It was confirmed that the release of BSA from implantable wafers could be easily controlled by adding natural additives.
Keywords
PLGA; PCL; wafer; additives; BSA.;
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