AG490抑制STAT3信号通路活性对豚鼠形觉剥夺性近视巩膜重塑的调控  

Arresting effect of AG490 inhibiting activation of STAT3 signaling pathway on sclera remodeling in guinea pigs with form-deprived myopia

作　　者：朱子诚[1] 吴章友[1] 温跃春[1] 柯根杰[1] 

机构地区：[1]安徽医科大学附属省立医院眼科,合肥230001

出　　处：《中华实验眼科杂志》2015年第6期493-499,共7页Chinese Journal Of Experimental Ophthalmology

基　　金：安徽省卫生厅医学科研课题项目（13zc046）

摘　　要：背景近年来研究发现，JAK／信号转导及转录激活蛋白3（STAT3）信号转导通路在近视形成和发展中发挥重要作用，AG490是JAK的一种特异抑制剂，因此可抑制JAK2／STAT信号转导，但AG490是否能抑制或延缓近视的进展尚不清楚。目的探讨玻璃体腔注射酪氨酸激酶选择性抑制剂AG490后STAT3信号通路的活性及其对豚鼠形觉剥夺性近视（FDM）过程中巩膜重塑的影响。方法采用随机数字表法将40只豚鼠随机分为正常对照组、模型对照组、PBS对照组和AG490治疗组，其中模型对照组、PBS对照组和AG490治疗组均用半透明眼罩遮盖右眼4周以制备FDM模型，自遮盖当天向PBS对照组和AG490治疗组豚鼠实验眼玻璃体腔分别注射PBS或AG490各5μl，每2天注射1次，至遮盖结束。分别于实验前及实验后4周检测各组豚鼠双眼的屈光度和眼轴长度，实验4周时摘取实验眼眼球制备巩膜组织切片，采用常规组织病理学检查观察实验眼巩膜的形态学改变，采用免疫组织化学及逆转录PCR（RT-PCR）技术检测各组实验眼巩膜组织中STAT3、p-STAT3、基质金属蛋白酶2（MMP-2）蛋白及其mRNA的表达。结果与正常对照组比较，模型对照组、PBS对照组和AG490治疗组豚鼠实验眼的近视屈光度增加，眼轴明显增长，AG490治疗组眼轴长度分别短于模型对照组和PBS对照组，4个组间差异均有统计学意义（屈光度：F=89．063，P=0．000；眼轴长度：F=96．145，P=0．000）。正常对照组豚鼠巩膜组织中STAT3、MMP-2、p-STAT3表达极微弱，AG490治疗组巩膜组织中STAT3、p-STAT3、MMP．2相对表达量（A值）分别为0．064±0．016、0．019±0．002和0．155±0．052，分别低于模型对照组的0．129±0．008、0．071±0．021、0．425±0．004和PBS对照组的0．130±0．004、0．069±0．002、0．421±0．042，差异均有统计学意义（STAT3：t=4．641，9．364，均P〈0．01；p-STAT3：t=4．63Background JAK/ signal transducer and activator of transcription 3 （STAT3） signal pathway plays a critical role during the sclera remodeling of experimental myopia. As a tyrosine kinase inhibitor, AG490 caninhibit the activation of this pathway. But whether AG490 plays a role in delaying the development of myopia is not completely clear. Objective This study was to investigate the inhibition of AG490 to activation of STAT3 signaling pathway and the sequential arresting effect on the selera remodeling in form-deprived myopia （FDM） models. Methods Forty guinea pigs were randomly divided into the normal control group,model control group,PBS control group and AG490 treatment group. FDM models were established by the occlusion of the right eyes of guinea pigs for consecutive 4 weeks using translucent goggles in the model control group, PBS control group and AG490 treated group,and 25 μl PBS or AG490 were respectively injected into vitreous since the first day of modeling in two-day interval till the fourth week in the PBS control group and AG490 treated group. Refractive state and axial length were examined with retinoscopy and A-scan uhrasonography before and 4 weeks after experiment. The experimental eyes were extracted in the fourth week,and the expressions of scleral STAT3 ,p-STAT3 ,metal matrix proteinase-2 （MMP-2） proteins and STAT3 mRNA, MMP-2 mRNA were detected by immunocytochemstry and semi-quantitative reverse transcription PCR （RT-PCR） respectively. The use and care of experimental animals followed ARVO. Results Compared to the normal control group, the negative refraction power and axial length were significantly increased in the model control group, PBS control group and AG490 treated group, and the axial length in the AG490 treated group was smaller than those in the model control group and PBS control group, showing significant differences among the 4 groups （ refraction ： F = 89. 063, P = 0. 000 ; axial length ： F = 96. 145, P = 0. 000 ）. The expressions of STAT3, MMP-2 and p-S

关 键 词：近视/预防和控制 巩膜 眼/生长和发育 形觉剥夺 Janus激酶2/拮抗剂和抑制剂 STAT3转录因子/拮抗剂和抑制剂 信号转导/药物作用 动物模型 豚鼠 

分 类 号：R778.11[医药卫生—眼科]