实验性自身免疫性葡萄膜炎大鼠闪光视网膜电图的改变
2017-09-20刘正峰郭大东李姣
刘正峰+郭大东+李姣
[摘要] 目的 观察实验性自身免疫性葡萄膜炎(EAU)大鼠闪光视觉诱发电位(F-VEP)和闪光视网膜电图(F-ERG)的改变。 方法 选取雌性Lewis大鼠(6~8周)12只,采用随机数字表法分为对照组和实验组,各6只。实验组大鼠后肢足底、两侧腹壁和躯干上皮下各注射含有光感受器间维生素A类结合蛋白(IRBP,1177-1191)和结核菌素(TB)的完全弗氏佐剂(CFA)乳化液,对照组大鼠不做处理。EAU大鼠模型制备8 d后,用眼底光学相干断层成像术(OCT)、眼底荧光素造影(FFA)及F-VEP和F-ERG等手段观察眼底病变情况。 结果 与对照组大鼠相比,实验组大鼠免疫后第8天眼底彩照、OCT及FFA等检查结果均无明显变化。两组F-VEP结果差异无统计学意义(P > 0.05);而与对照组大鼠相比,实验组大鼠F-ERG有显著改变,差异有统计学意义(P < 0.05)。 结论 免疫后第8天,EAU大鼠视网膜电图已经发生改变,表明EAU大鼠视网膜细胞已经受到损害。
[关键词] 实验性自身免疫性葡萄膜炎;眼底光学相干断层成像术;眼底荧光素造影;闪光视觉诱发电位;闪光视网膜电图
[中图分类号] R773 [文献标识码] A [文章编号] 1673-7210(2017)08(c)-0004-05
[Abstract] Objective To observe the changes of flash visual evoked potential (F-VEP) and flash electroretinogram (F-ERG) in experimental autoimmune uveitis (EAU) rats. Methods 12 female Lewis rats (6-8 weeks old) were randomly divided into the control group and the experimental group with a random number table method. Each group included 6 rats. EAU models were induced by injection of interphotor-eceptor retinoid binding protein (IRBP, 1177-1191) supplemented with complete Freund adjuvant (CFA) and tuberculin (TB) at footpads, napes and back of the body; while another 6 rats without any treatment were used as normal controls. After EAU induction for 8 days, both EAU and control rats were examined by Fundus, fundus fluorescein angiography (FFA), optical coherence tomography (OCT), F-VEP and F-ERG techniques, respectively. Results Compared with those in control group, the results of rats in EAU group determined by fundus photograph, OCT and FFA had no apparent alterations after induction for 8 days, and no significant difference in F-VEP measurement was found between the two groups (P > 0.05), however, there was a significant difference for the result of F-ERG between EAU and control groups (P < 0.05). Conclusion The F-ERG in EAU rats has been apparent changed after EAU induction for 8 days, indicating that the retinal cells have been damaged.
[Key words] Experimental autoimmune uveitis; Optical coherence tomography; Fundus fluorescein angiography; Flash visual evoked potential; Flash electroretinogram
葡萄膜炎是一类主要由T淋巴细胞介导的、可引起视力严重损害的眼科疾病[1],其导致的盲多为不可治盲[2],因而给社会和家庭造成了严重的负担[3]。臨床研究发现,自身免疫应答可以导致绝大多数的葡萄膜炎[4]。由于人体病理取材研究的困难性,因此,研究人员在体外建立了葡萄膜炎的内源性动物模型——实验性自身免疫性葡萄膜炎(experimental autoimmune uveitis,EAU)[5]。EAU是以特异性的抗原来免疫敏感品系动物诱导产生的一种组织特异性自身免疫性疾病,诱导的病变主要位于葡萄膜和视网膜,是实验最常用的人类后葡萄膜炎模型,与Vogt-小柳原田(Vogt-Koyanagi-Harada syndrome,VKH)综合征、人类交感性眼炎和眼结节病等有相似的临床和病理特征[6]。19……
