新托品对豚鼠形觉剥夺性近视的抑制作用及机制  

Effect of neotropine against form deprivation myopia in guinea pigs and mechanism

作　　者：杨心怡 黄洪鹏 郭晓萱 鲍正好 张鹏[1] 骆媛 孙岚 王永安 YANG Xinyi;HUANG Hongpeng;GUO Xiaoxuan;BAO Zhenghao;ZHANG Peng;LUO Yuan;SUN Lan;WANG Yongan(Wuya collage of innovation,Shenyang Pharmaceutical University,Shenyang 110016,China;State Key Laboratory of National Security Specially Needed Medicines,Academy of Millitary Medical Sciences,Beijing 100850,China;School of Pharmaceutical Science,Liaoning University,Shenyang 110036,China)

机构地区：[1]沈阳药科大学无涯创新学院,辽宁沈阳110016 [2]军事科学院军事医学研究院国家安全特需药品全国重点实验室,北京100850 [3]辽宁大学药学院,辽宁沈阳110036

出　　处：《中国药理学与毒理学杂志》2024年第5期360-368,共9页Chinese Journal of Pharmacology and Toxicology

摘　　要：目的 探究毒蕈碱受体拮抗剂新托品对豚鼠形觉剥夺性近视(FDM)的抑制作用及机制。方法 随机将三色豚鼠分为正常对照组、FDM模型组、FDM+生理盐水组、FDM+阿托品组和FDM+新托品组,每组8只。除正常对照组外,其余各组均对豚鼠右眼连续遮盖14 d建立豚鼠FDM模型,给药组每2 d分别于玻璃体腔内注射10μL生理盐水、1%阿托品或1%新托品1次。测量干预前和干预14 d后双眼屈光度和眼轴长度,而后取豚鼠右眼眼球,采用HE染色评价巩膜组织病理结构,天狼星红染色检测巩膜胶原蛋白含量,RT-qPCR法检测豚鼠巩膜转化生长因子β_(1)(TGF-β_(1))、基质金属蛋白酶2(MMP-2)和金属蛋白酶组织抑制因子2(TIMP-2)mRNA表达水平,Western印迹法检测豚鼠巩膜Ⅰ型胶原蛋白(Col-Ⅰ)和TGF-β_(1)蛋白表达水平,免疫组化法检测豚鼠巩膜MMP-2,TIMP-2和Ki-67蛋白表达水平。结果 与正常对照组比较,FDM模型组豚鼠眼球屈光度显著降低(P<0.01),眼轴显著伸长(P<0.01),巩膜纤维束分布散乱,胶原细胞稀疏,巩膜厚度减少(P<0.01),胶原蛋白含量显著降低(P<0.01),巩膜组织TIMP-2和TGF-β_(1)mRNA和蛋白表达均显著降低(P<0.05,P<0.01),MMP-2 mRNA和蛋白表达显著升高(P<0.01),Col-Ⅰ蛋白表达水平降低(P<0.05),Ki-67蛋白表达水平升高(P<0.01)。与FDM模型组相比,FDM+生理盐水组各指标均无显著变化;FDM+新托品组和FDM+阿托品组豚鼠右眼屈光度均显著升高(P<0.05),眼轴长度显著缩短(P<0.05),胶原纤维排列较紧密,纤维束分布较有序,胶原细胞分布较均匀,巩膜厚度明显增加(P<0.01),胶原蛋白含量显著升高(P<0.05,P<0.01),巩膜组织TIMP-2和TGF-β_(1)mRNA和蛋白表达均显著升高(P<0.05,P<0.01),MMP-2 mRNA和蛋白表达显著降低(P<0.05,P<0.01),Col-Ⅰ蛋白表达水平升高(P<0.05,P<0.01),Ki-67蛋白表达水平降低(P<0.05,P<0.01)。结论 毒蕈碱受体拮抗剂新托品可通过逆转FDM模型豚鼠巩膜组织TGF-β_(1)下调和MMOBJECTIVE To investigate the modulating effect of neotropics on form deprivation myopia(FDM)in guinea pigs.METHODS Tricolour guinea pigs were randomly divided into normal control group,FDM model group,FDM+saline group,FDM+atropine group,and FDM+neotropine group,with eight animals in each group.Except for the normal control group,the right eyes of the guinea pigs were covered for 14 d to establish a guinea pig FDM model.The drug administration groups were injected with 10μL of saline,1%atropine,or 1%neotropine into the vitreous cavity once every other day.The changes in the refractive error and axial length of both eyes were recorded for 1 d before the intervention and for 14 d after the intervention.Then,the eyeballs of guinea pigs were taken from the right eyes.HE staining was used to evaluate the histopathological structure of the sclera while sirius red staining was used to detect the collagen protein content in the sclera.RT-qPCR was used to detect the mRNA expressions of transforming growth factor-β_(1)(TGF-β_(1)),matrix metalloproteinase(MMP-2)and tissue inhibitor of metalloproteinase(TIMP-2)in guinea pigs'sclera.The protein expression levels of collagen typeⅠ(Col-Ⅰ)and TGF-β_(1) in guinea pig sclera were detected by Western blotting while those of MMP-2,

关 键 词：新托品 近视 形觉剥夺性近视 

分 类 号：R778[医药卫生—眼科] R965[医药卫生—临床医学]