单眼慢性阿托品化对视觉发育关键期内大鼠视觉发育的影响

目的:探讨单眼阿托品化对视觉发育关键期内大鼠视觉发育的影响。方法:将20只出生14d的健康SD大鼠随机分为实验组和对照组,每组10只,均选取左眼为干预眼,右眼作为对照眼。实验组1%硫酸阿托品眼用凝胶点左眼,每日3次,右眼生理盐水点眼,每日3次。对照组大鼠给予生理盐水点双眼,每日3次。在点眼前及点眼后的7,14,21,28d分别行闪光视觉诱发电位检查及带状检影法测量屈光度。在点药后28d,从实验组和对照组中各随机选取3只大鼠,检测c-fos mRNA的表达;后在实验组与对照组中再各随机选取3只大鼠,放入暗室2d后给予2h正常饲养环境光线刺激,再次检测c-fos mRNA的表达。结果:实验组点药后...

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Published in国际眼科杂志 Vol. 15; no. 4; pp. 592 - 595
Main Author 武雅贞 邢咏新 严宏
Format Journal Article
LanguageChinese
Published 第四军医大学唐都医院眼科, 中国陕西省西安市,710038 2015
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Summary:目的:探讨单眼阿托品化对视觉发育关键期内大鼠视觉发育的影响。方法:将20只出生14d的健康SD大鼠随机分为实验组和对照组,每组10只,均选取左眼为干预眼,右眼作为对照眼。实验组1%硫酸阿托品眼用凝胶点左眼,每日3次,右眼生理盐水点眼,每日3次。对照组大鼠给予生理盐水点双眼,每日3次。在点眼前及点眼后的7,14,21,28d分别行闪光视觉诱发电位检查及带状检影法测量屈光度。在点药后28d,从实验组和对照组中各随机选取3只大鼠,检测c-fos mRNA的表达;后在实验组与对照组中再各随机选取3只大鼠,放入暗室2d后给予2h正常饲养环境光线刺激,再次检测c-fos mRNA的表达。结果:实验组点药后14d产生屈光参差,两眼相差3.9D(P〈0.05),实验组大鼠左眼F-VEP的P1波在点药后21d峰时值延长为88.9±1.889ms,与右眼相比差异有统计学意义(P〈0.05)。点药后28d,实验组大鼠左侧视皮层中c-fos mRNA表达较右侧视皮层高,但无显著差异;但在放入暗室2d后再给予2h光线刺激,实验组大鼠左侧视皮层中c-fos mRNA表达为右侧视皮层的5倍,有显著统计学差异(P〈0.05)。结论:在视觉发育关键期内大鼠的单眼慢性阿托品化可形成屈光参差,使视传导发生延迟,阻碍了视皮层的正常发育。大鼠的单眼慢性阿托品化可作为制作屈光参差的研究模型。
Bibliography:61-1419/R
Ya-Zhen Wu, Yong-Xin Xing, Hong Yan
atropinization;critical periods of visual development;flash visual evoked potentials;anisometropia;c-fos
AIM: To investigate the changes of visual development produced by monocular atropinization in rats.METHODS: Twenty normal SD rats were randomly divided into two groups: control group( n = 10) and atropinization( experimental) group( n = 10). All the left eyes were selected as the experimental eyes,and the right eyes served as the normal eyes. The left eyes in atropinization group was produced by 1% atropine,3 times a day and the right eyes in control group was treated with normal saline,3 times a day. The flash visual evoked potentials( F- VEP) and retinoscopy refraction of the rats’ both eyes were detected at five time points: 0,7,14,21,and 28 d after atropinization,respectively. After 28 d,six rats were randomly selected from both groups and each group had three rats. The expression of the c- fos mRNA was observed in both visual cortexes.Another six rats were ch
ISSN:1672-5123
DOI:10.3980/j.issn.1672-5123.2015.4.06