Periocular injection of candesartan-PLGA microparticles inhibits laser-induced experimental choroidal neovascularization

被引:2
作者
Okuda, Yoshitaka [1 ]
Fukumoto, Masanori [1 ]
Horie, Taeko [1 ]
Oku, Hidehiro [1 ]
Takai, Shinji [2 ]
Nakanishi, Toyofumi [3 ]
Matsuzaki, Kaori [4 ]
Tsujimoto, Hiroyuki [4 ]
Ikeda, Tsunehiko [1 ]
机构
[1] Osaka Med Coll, Dept Ophthalmol, 2-7 Daigaku Machi, Takatsuki, Osaka 5698686, Japan
[2] Osaka Med Coll, Grad Sch Med, Dept Innovat Med, Osaka, Japan
[3] Osaka Med Coll, Dept Clin & Lab Med, Osaka, Japan
[4] Hosokawa Micron Corp, Res & Dev Div, Osaka, Japan
基金
日本学术振兴会;
关键词
age-related macular degeneration; choroidal neovascularization; renin-angiotensin system; candesartan; macrophage; monocyte chemotactic protein 1; poly(lactic-co-glycolic acid); ENDOTHELIAL GROWTH-FACTOR; MONOCYTE CHEMOATTRACTANT PROTEIN-1; IN-VITRO; MACULAR DEGENERATION; DRUG-DELIVERY; TRIAMCINOLONE ACETONIDE; MACROPHAGES; MICROSPHERES; RELEASE; VIVO;
D O I
10.2147/OPTH.S181110
中图分类号
R77 [眼科学];
学科分类号
100212 ;
摘要
Purpose: Microparticle technology enables local administration of medication. The purpose of this study was to examine the inhibitory effect of locally administered candesartan (CAN)-encapsulated microparticles on experimental choroidal neovascularization (CNV). Methods: Laser photocoagulation was used to induce CNV in Brown Norway rats. The rats were pretreated with subconjunctival injections of CAN (5.0 mg/eye) or phosphate buffer saline for 3 days before photocoagulation. The volume of CNV was evaluated 7 days after laser injury using the lectin staining technique. The infiltration of macrophages within the CNV lesion was determined using immunofluorescent staining with an anti-CD68 antibody. mRNA levels of MCP-1, IL1-beta and VEGF in the retinal pigment epithelium/choroid complex were determined using quantitative PCR (q-PCR). Results: CNV volume was significantly suppressed by the treatment with CAN compared with that in vehicle-treated eyes (P<0.05, two-tailed Student's t-test). Subconjunctival injections of CAN decreased the numbers of CD68(+) cells in the CNV lesion. The increased mRNA levels of MCP-1, IL1-beta, and VEGF induced by photocoagulation was significantly suppressed following the local administration of CAN (P<0.05, two-tailed Student's t-test). Conclusion: Local administration of CAN inhibited experimentally induced CNV possibly through anti-inflammatory effects.
引用
收藏
页码:87 / 93
页数:7
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