球周注射曲安奈德对兔眼周围组织的影响  

Influence of triamcinolone acetonide on peribulbus tissues via periocular injection

作　　者：李常栋 朱国伟[1] 李琳[1] 郭乔茜 陈雪艺[1] 

机构地区：[1]新疆医科大学第一附属医院眼科,乌鲁木齐830054

出　　处：《中华实验眼科杂志》2014年第3期226-230,共5页Chinese Journal Of Experimental Ophthalmology

摘　　要：背景 曲安奈德（TA）在眼科常用于治疗葡萄膜炎、糖尿病视网膜病变等眼底疾病,但其对眼周围正常组织是否有毒性作用尚需进一步研究. 目的 探讨球周注射TA对兔眼周围组织的影响.方法 将27只新西兰大白兔按随机数字表法随机分为实验组、生理盐水组和空白对照组,实验组于喂养的第5周和第9周球周注射20 mg TA悬浮液（0.5 ml）各1次,生理盐水组兔眼分别注射0.5ml等容量生理盐水,方法同实验组,空白对照组兔不给予任何干预.分别于注药前1d及第2次注射后1、2、3个月以过量麻醉法分别处死各组实验兔各3只,制备兔眼各条眼外肌、球周脂肪、泪腺及视神经组织标本,行常规苏木精-伊红染色,分别在光学显微镜和透射电子显微镜下观察上述组织的组织病理学和超微结构改变. 结果 注射前及注射后1、2、3个月各组兔眼的眼压差异均无统计学意义（F分组=0.952,P=0.881;F时间=7.297,P=0.411）.空白对照组与生理盐水组兔眼各条眼肌、泪腺、视神经及球周脂肪组织的形态学和超微结构均未发现明显异常,但实验组兔眼光学显微镜下各条眼肌均可见肌横纹结构消失,肌浆网扩张,间隙增宽；泪腺可见腺上皮细胞数量增多,细胞核增大,细胞质混浊、肿胀,嗜酸性增强,腺体数量增加；视神经纤维可见排列紊乱,空泡变性,神经胶质细胞数量减少,细胞核大小不一.透射电子显微镜下实验组兔眼各眼外肌组织结构均可见肌纤维排列紊乱,横纹、明带、暗带部分消失,肌浆网扩张,细胞核呈椭圆形位于肌膜下方；泪腺可见腺上皮细胞肿胀,体积增大,细胞核膜增厚,轻度扭曲,细胞膜水肿,细胞器数目明显增多；视神经纤维髓鞘厚薄不均,轴突与髓鞘间腔隙形成,髓鞘结构紊乱,出现板层分离现象,部分松解、变性.实验组兔眼球周脂肪组织在光学显微镜和透射电子显微镜下均未见明显结构异常.�Background Triamcinolone acetonide （TA） is often used in the treatment of uveitis and fundus disease,but whether it has toxic effect to normal tissue around eyes is unclear.Objective The aim of this study was to explore the adverse and toxic effects of TA on the periorbitally normal tissue following the periocular injection.Methods Twenty-seven New Zealand albino rabbits were randomly divided into experimental group,normal saline solution group and blank control group.TA was periocularly injected twice （20 mg for each） at 1-month interval in the rabbits of the experimental group,and 0.5 ml normal saline solution was used in the same way in the rabbits of the normal saline solution group.Not any drug was used in the blank group.The rabbits were sacrificed 1 month and 2 months,3 months after the secondary injection.For the preparation of the specimens of extraocular muscles,peribulbus adipose tissue,lacrimal gland and optic nerve.Hematoxylin and eosin staining of the specimens was performed to examine the the pathological change under the optical microscope,and the ultrastructural of peribulbus tissues was observed under the transmission electron microscope.Results No statistically significant change was found in IOP among various time points and groups （Fgroup =0.952,P =0.881 ; Ftime =7.297,P =0.411）.The hyphological structures and ultrastructure of extraocular muscles,peribulbus adipose tissue,lacrimal gland and optic nerve were normal in the rabbits of the normal saline solution group and the blank control group.However,the optical microscopy showed varying degrees of atrophy or dissolving in the extraocular muscle fibers,the increase of glandular epithelial cells and enlargement of nuclei in the lacrimal gland as well as visible disorder arrangement of nerve fibers,vacuoles degeneration and the decrease of glial cells in optial nerve tissue in the rabbits of the experimental group from 1 month though 3 months after the secondary injection.Under the transmission electron microscope,the muscle stripes

关 键 词：曲安奈德 不良反应 球周注射 眼外肌 病理 泪腺 病理 视神经 病理 眼压 药物作用 

分 类 号：R965[医药卫生—药理学]