Effectiveness of conjunctival bleb scarring by knockdown of heat shock protein 47 in rat model  

作　　者：Wei-Wei Wang Hai-Yan Li Huan-Huan Yan 

机构地区：[1]Shaanxi Eye Hospital,Xi’an People’s Hospital(Xi’an Fourth Hospital),Affiliated Guangren Hospital,School of Medicine,Xi’an Jiaotong University,Xi’an 710004,Shaanxi Province,China

出　　处：《International Journal of Ophthalmology(English edition)》2023年第10期1589-1594,共6页国际眼科杂志（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.81500719);Shaanxi Science and Technology Project(No.2022SF-434);Xi’an Science and Technology Project(No.21YXYJ0044).

摘　　要：AIM:To evaluate the effectiveness of knock-down of heat shock protein 47(HSP47)on conjunctival bleb scarring in a rat model and its possible mechanism.METHODS:Male Sprague–Dawley rats were used for glaucoma filtration surgery(GFS)and were treated with either phosphate buffered solution,shControl,mitomycin C,or sh-HSP47 using a microsyringe immediately after GFS.The morphology of filtering blebs was observed postoperatively.The levels of HSP47 were analyzed at 2,5,8,and 11d after GFS via real‑time quantitative polymerase chain reaction(PCR)and Western blot.The silencing effect of HSP47,the expression of collagen I and III,and the potential signaling pathways of HSP47 during scarification were explored 11d post GFS.The protein levels of transforming growth factor-β1(TGF-β1),phospho-Smad2(pSmad2),phospho-Smad3(p-Smad3),and phospho-p38(p-p38)were also analyzed using Western blot.RESULTS:Sh-HSP47 treatment significantly prolonged the functional filtration bleb retention.The levels of HSP47 were increased significantly at 5,8,and 11d postoperatively compared to the control group(P<0.05,P<0.01,and P<0.001).The levels of HSP47 protein at day 11 postoperatively were significantly down-regulated after HSP47 silencing using sh-HSP47 adenovirus transfection(P<0.01).Expression levels of collagen I and III within the blebs were significantly reduced in the absence of HSP47(P<0.01).Moreover,the protein levels of TGF-β1,p-Smad2/3,and p-p38 were dramatically inhibited after treatment with sh-HSP47(P<0.01).CONCLUSION:The inhibitory effects of HSP47 knockdown on scarring after GFS have the potential to be an efficacious therapeutic option for the treatment of conjunctival bleb scarring.

关 键 词：heat shock protein 47 filtration surgery conjunctival bleb SCAR transforming growth factor-β1 

分 类 号：R775[医药卫生—眼科] R-332[医药卫生—临床医学]