Sustained release of ganciclovir and foscarnet from biodegradable scleral plugs for the treatment of cytomegalovirus retinitis

Yi Jie Peng, Chin Wei Wen, Shih Hwa Chiou, Shih Jung Liu*

*此作品的通信作者

研究成果: Article同行評審

10 引文 斯高帕斯(Scopus)

摘要

The purpose of this report was to develop solvent-free biodegradable scleral plugs for simultaneous ganciclovir and foscarnet delivery for cytomegalovirus retinitis treatment. To fabricate a biodegradable plug, polylactide-polyglycolide copolymers were pre-mixed with the drugs. The mixture was then compression molded and sintered to form a compact scleral plug. The drug release features were monitored with HPLC assay both in vitro and in vivo. Both drugs showed a biphasic release curvature with an initial burst and followed by a second sustained release phase and maintained at therapeutic level for 3-4 weeks. As compared to ganciclovir, foscarnet was released faster in initial phase, but later, showed extended retention in vitreous humor. For biocompatibility analysis, dark-adapted flash electroretinography was performed, and the a-wave and b-wave amplitudes were statistically equal before and after the scleral plug implantation. Finally, serial microstructure changes of releasing scleral plugs were evaluated with scanning electron microscope. The scleral plug surface showed progressive transformation from granular solid surface to smoothen and cavitated appearance.

原文English
頁(從 - 到)1773-1779
頁數7
期刊Biomaterials
31
發行號7
DOIs
出版狀態Published - 3月 2010

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