Miao He1, Wei Wang2, Honghua Yu1, Decai Wang2, Dan Cao1, Yunkao Zeng1,3, Qiaowei Wu1,4, Pingting Zhong1,3, Zhixing Cheng1, Yunyan Hu1, Liang Zhang5. 1. Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China. 2. Zhongshan Ophthalmic Center, State Key Laboratory of Ophthalmology, Sun Yat-Sen University, Guangzhou, China. 3. Shantou University Medical College, Shantou, China. 4. Southern Medical University, Guangzhou, China. 5. Department of Ophthalmology, Guangdong Academy of Medical Sciences, Guangdong Provincial People's Hospital, No. 106, Zhongshan Er Road, Guangzhou, Guangdong, China. zhangliang5413@163.com.
Abstract
AIMS: To compare circular (circRNA) expression levels in the vitreous humour between PDR (proliferative diabetic retinopathy) and the control groups. METHODS: The present study collected vitreous humour samples of both the PDR group and the control group (composed of rhegmatogenous retinal detachment, idiopathic macular hole and idiopathic macular epiretinal membrane). All the samples were subjected to circRNA and mRNA sequencing as well as bioinformatic analysis. RESULTS: The vitreous humour of the PDR and control groups was collected during PPV surgery. Compared to the control group, 122 upregulated and 9 downregulated circRNAs, and 818 upregulated mRNAs and 864 downregulated mRNAs were identified. We further selected 12 circRNAs to validate the RNA expression level by qPCR; results showed that with the exception of 2 downregulated circRNAs the remaining were significantly upregulated in the PDR group, which was consistent with RNA sequencing results. Bioinformatic analysis was conducted to predict possible miRNAs absorbed by circRNAs. Each circRNA could interact with at least five miRNAs. We randomly chose three miRNAs to test the expression level in the vitreous humour by qPCR and found these miRNAs were significantly downregulated in the PDR group. CONCLUSIONS: The changed profiling of circRNAs in the vitreous humour was reliable and may become a promising biomarker of DR and the circRNA-miRNA-mRNA network. It may also play an important role in the progression of DR.
AIMS: To compare circular (circRNA) expression levels in the vitreous humour between PDR (proliferative diabetic retinopathy) and the control groups. METHODS: The present study collected vitreous humour samples of both the PDR group and the control group (composed of rhegmatogenous retinal detachment, idiopathic macular hole and idiopathic macular epiretinal membrane). All the samples were subjected to circRNA and mRNA sequencing as well as bioinformatic analysis. RESULTS: The vitreous humour of the PDR and control groups was collected during PPV surgery. Compared to the control group, 122 upregulated and 9 downregulated circRNAs, and 818 upregulated mRNAs and 864 downregulated mRNAs were identified. We further selected 12 circRNAs to validate the RNA expression level by qPCR; results showed that with the exception of 2 downregulated circRNAs the remaining were significantly upregulated in the PDR group, which was consistent with RNA sequencing results. Bioinformatic analysis was conducted to predict possible miRNAs absorbed by circRNAs. Each circRNA could interact with at least five miRNAs. We randomly chose three miRNAs to test the expression level in the vitreous humour by qPCR and found these miRNAs were significantly downregulated in the PDR group. CONCLUSIONS: The changed profiling of circRNAs in the vitreous humour was reliable and may become a promising biomarker of DR and the circRNA-miRNA-mRNA network. It may also play an important role in the progression of DR.
Authors: Marta Greco; Eusebio Chiefari; Francesca Accattato; Domenica M Corigliano; Biagio Arcidiacono; Maria Mirabelli; Rossella Liguori; Francesco S Brunetti; Salvatore A Pullano; Vincenzo Scorcia; Antonino S Fiorillo; Daniela P Foti; Antonio Brunetti Journal: Front Endocrinol (Lausanne) Date: 2020-08-04 Impact factor: 5.555