Effects of Yiqi Congming Decoction on the levels of matrix metalloproteinase-2 and phosphorylated c-Jun N-terminal kinase in the scleral tissues of rats with lens-induced myopia
10.13389/j.cnki.rao.2024.0160
- VernacularTitle:益气聪明汤在光学离焦性近视大鼠巩膜组织MMP-2、p-JNK表达中的作用
- Author:
Xinxin ZHANG
1
;
Yanhua JIANG
;
Lei ZHAO
Author Information
1. 110032 辽宁省沈阳市,辽宁中医药大学
- Keywords:
lens-induced myopia;
sclera;
matrix metalloproteinase-2;
phosphorylated c-Jun N-terminal kinase
- From:
Recent Advances in Ophthalmology
2024;44(11):846-851
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effects of Chinese medicine prescription Yiqi Congming Decoction on the expressions of matrix metalloproteinase-2(MMP-2)and phosphorylated c-Jun N-terminal kinase(p-JNK)in the scleral tis-sues of rats with lens-induced myopia(LIM).Methods A total of 60 male and female specific-pathogen-free 21d Sprague Dawley rats without eye disease were included.The right eye was selected.These rats were randomly divided into the blank(BG)group,model(MG)group,low-dose traditional Chinese medicine(LG)group,medium-dose traditional Chi-nese medicine(MD)group,high-dose traditional Chinese medicine(HG)group and western medicine(WG)group,with 10 rats in each group.The-5 D myopic defocus lens was polished to a circle with a diameter of about 1.7 cm with small holes made on both sides and sewed on the upper and lower eyelid skin of the right eye of rats in the MG,LG,MD,HG and WG groups to build a LIM model.Intragastric administration was initiated 4 weeks after molding.Rats in the WG group were given 0.1 g·L-1 atropine eye drops,rats in the BG group did not receive any intervention,rats in the LG,MD and HG groups were administered with Yiqi Congming Decoction intragastrically,and rats in the MG and BG groups were given normal saline by intragastric administration.The axial length of rats in each group was recorded before,4 weeks and 8 weeks after modeling.The rats were sacrificed after 8 weeks of modeling.Hematoxylin-eosin(HE)staining was used to observe the histomorphological changes of sclera in rats.The protein expressions of MMP-2 and p-JNK in the sclera of rats were detected by Western blot.The positive expression of MMP-2 in the scleral tissues of rats was detected through immu-nohistochemistry.The diameter of the scleral collagen fibers of rats in each group was observed by a transmission electron microscope.Results At 4 weeks and 8 weeks after modeling,compared with the BG group,the axial length of rats in the MG group significantly increased(both P＜0.001);compared with the MG group,the axial length of rats showed a sig-nificant decrease in the WG,LG,MD and HG groups(all P＜0.05).At 8 weeks after modeling,the scleral collagen fibers of rats in the BG group were arranged regularly and ran normally.Compared with the BG group,the scleral collagen fibers of rats in the MG group were distributed sparsely with obvious fiber gaps and arranged irregularly;compared with the MG group,the arrangement of scleral collagen fibers in the MD and HG groups was more regular,and the space between fibers was smaller,while the collagen fibers between scleral layers in the LG and WG groups were relatively clear and compact.Compared with the BG group,the expressions of MMP-2 and p-JNK in the sclera of rats in the MG group significantly in-creased(both P＜0.001);compared with the MG group,the expressions of MMP-2 and p-JNK in the sclera of rats in the WG,LG,MD and HG groups significantly decreased(all P＜0.05).Compared with the BG group,the positive expression of MMP-2 protein in the sclera of rats in the MG group increased(P＜0.001);compared with the MG group,the positive expression of MMP-2 protein in the sclera of rats in the WG,LG,MD and HG groups decreased(all P＜0.05).Under a transmission electron microscope,the scleral collagen fibers were arranged orderly and compactly with uniform size in rats of the BG group;compared with the BG group,scleral collagen fiber dissolution was found in the MG group;compared with the MG group,the scleral collagen fiber dissolution decreased and the density increased in the WG and LG groups.Com-pared with the MG group,the diameter of scleral collagen fibers was more uniform in the MD and HG groups with fewer in-terspaces and no fiber dissolution.Conclusion Yiqi Congming Decoction can regulate the expressions of MMP-2 and p-JNK in the sclera of LIM rats,and slow down the occurrence and development of myopia.
