Role of hsa_circ_0007482 in pterygium development: insights into proliferation, apoptosis, and clinical correlations  

作　　者：Li-Yun Zhang Xin Liu Shuo Zheng Wen-Qun Xi Xue-Ping Wu Dan-Yao Nie Hui-Ling Hu Jian-Tao Wang Xin-Hua Liu Jing Zhang 

机构地区：[1]Shenzhen Eye Hospital,Jinan University,Shenzhen Eye Institute,Shenzhen 518000,Guangdong Province,China

出　　处：《International Journal of Ophthalmology(English edition)》2024年第8期1387-1395,共9页国际眼科杂志（英文版）

基　　金：Supported by Guangdong Basic and Applied Basic Research Foundation (No.2021A1515111012).

摘　　要：AIM:To investigate the impact of hsa_circ_0007482 on the proliferation and apoptosis of human pterygium fibroblasts(HPFs)and its correlation with the severity grades of pterygium.METHODS:Pterygium and normal conjunctival tissues were collected from the superior area of the same patient’s eye(n=33).The correlation between pterygium severity and hsa_circ_0007482 expression using quantitative reversetranscription polymerase chain reaction(RT-qPCR)were analyzed.Three distinct siRNA sequences targeting hsa_circ_0007482,along with a negative control sequence,were transfected into HPFs.Cell proliferation was assessed using the cell counting kit-8.Expression levels of Ki67,proliferating cell nuclear antigen(PCNA),Cyclin D1,Bax,B-cell lymphoma-2(Bcl-2),and Caspase-3 were measured via RT-qPCR.Immunofluorescence staining was employed to detect Ki67 and vimentin expressions.Apoptosis was evaluated using flow cytometry.RESULTS:Hsa_circ_0007482 expression was significantly higher in pterygium tissues compared to normal conjunctival tissues(P<0.001).Positive correlations were observed between hsa_circ_0007482 expression and pterygium severity,thickness,and vascular density.Knockdown of hsa_circ_0007482 inhibited cell proliferation,reducing the mRNA expression of Ki67,PCNA,and Cyclin D1 in HPFs.Hsa_circ_0007482 knockdown induced apoptosis,increasing mRNA expression levels of Bax and Caspase-3,while decreasing Bcl-2 expression in HPFs.Additionally,hsa_circ_0007482 knockdown attenuated vimentin expression in HPFs.CONCLUSION:The downregulation of hsa_circ_0007482 effectively hampers cell proliferation and triggers apoptosis in HPFs.There are discernible positive correlations detected between the expression of hsa_circ_0007482 and the severity of pterygium.

关 键 词：hsa_circ_0007482 circular RNA PTERYGIUM cell proliferation APOPTOSIS 

分 类 号：R77[医药卫生—眼科]