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标题：Intravitreous Delivery of Dexamethasone Sodium m-Sulfobenzoate from Poly(DL-Lactic Acid) Implants
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作者：Yasushi MORITA ; Akira OHTORI ; Masako KIMURA 等
期刊名称：Biological and Pharmaceutical Bulletin
印刷版ISSN：0918-6158
电子版ISSN：1347-5215
出版年度：1998
卷号：21
期号：2
页码：188-190
DOI：10.1248/bpb.21.188
出版社：The Pharmaceutical Society of Japan
摘要：Biodegradable intravitreal rod-shaped implants containing dexamethasone sodium m-sulfobenzoate (DMSB) were prepared from blends of poly(DL-lactic acid) (PLA) with number-average molecular weight 2000 (PLA2000) and 4000 (PLA4000). The effect of the fraction of PLA2000 on the release of DMSB from the implant was investigated after implantation in the vitreous body of rabbit eyes. After the initial burst, the drug was released slowly from the blended PLA implants with a PLA2000 fraction of below 30 wt% in normal eyes within a period of 28 d. For the implants with a higher PLA2000 fraction of over 50 wt%, the drug was released following approximately first order kinetics. In the vitrectomized eyes, the release of DMASB from the PLA2000/PLA4000 (5/5) implant was 2.5 times more rapid than in normal eyes, and the clearance of drug was also appreciable accelerated as compared with that in normal eyes.
关键词：dexamethasone sodium m-sulfobenzoate;poly(DL-lactic acid);implant;vitreous;vitrectomy;rabbit