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Controlled release of human immunoglobulin G. 2. Morphological characterization
C H Wang1, K Sengothi, H M Wong
1Department of Chemical Engineering and Department of Surgery, National University of Singapore, 10 Kent Ridge Crescent, Singapore - 119260. chewch@nus.edu.sg
Journal of Pharmaceutical Sciences
|February 9, 1999
Summary
This study characterizes immunoglobulin G (IgG)-loaded polymer matrixes for drug delivery. Advanced microscopy techniques revealed morphological changes, significantly reducing the burst effect and improving release kinetics.
Area of Science:
- Biomaterials Science
- Drug Delivery Systems
- Immunology
Background:
- Human immunoglobulin G (IgG) is crucial in treating immunological disorders and targeted drug delivery.
- Nonbiodegradable polymer matrixes offer potential for controlled release applications.
Purpose of the Study:
- To characterize immunoglobulin G (IgG)-dispersed monolithic matrixes with varying geometries.
- To investigate morphological changes during drug release using advanced microscopy.
- To assess the effectiveness of these matrixes in mitigating the burst effect and controlling release kinetics.
Main Methods:
- Preparation of IgG-dispersed monolithic matrixes using EVAc polymer.
- Morphological analysis using scanning electron microscopy (SEM), polarizing microscopy, atomic force microscopy (AFM), and X-ray photoelectron microscopy (XPM).
- Comparative analysis of microscopy results to understand matrix behavior.
Main Results:
- Detailed characterization of IgG-dispersed monolithic matrixes.
- Significant reduction in the burst effect of drug release.
- Demonstration of advanced microscopy techniques for elucidating matrix morphology and release mechanisms.
Conclusions:
- The developed EVAc matrixes show promise for controlled IgG delivery.
- Advanced microscopy is valuable for understanding drug release kinetics from polymer matrixes.
- The study provides insights into optimizing matrix design for improved therapeutic outcomes.