• 1. Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin 300384, China;
Wang Linni, Email: wln5156@163.com
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Objective  To observe the effect of Nodal on the biological behavior of retinal vascular endothelial cells (RF/6A cells) in monkeys with high glucose. Methods RF/6A cells were divided into normal group, mannitol group, high glucose group, high glucose combined with non-specific small interfering RNA treatment group (HG+NC group), high glucose combined with small interfering Nodal treatment group (HG+siNodal group). The transfection efficiency of siNodal was observed by real-time fluorescence quantitative PCR and western blot protein immunoblotting. The effect of Nodal on the proliferation of RF/6A cells was detected by thiazole blue colorimetry. The effect of Nodal on migration ability of RF/6A cells was detected by cell scratch assay. The effect of Nodal on the formation of RF/6A cell lumen was measured by Matrigel three-dimensional in vitro. The expression of extracellular signal phosphorylated regulated kinase 1/2 (pERK1/2) in RF/6A cells was detected by western blot protein immunoblotting. One-way analysis of variance was used to compare groups. Results Compared with HG+NC group, Nodal protein (F=33.469) and mRNA relative expression levels (F=38.191) in HG+siNodal group were significantly decreased, cell proliferation was significantly decreased (F=28.548), and cell migration ability was significantly decreased (F=24.182). The number of cell lumen formation was significantly decreased (F=52.643), and the differences were statistically significant (P<0.05). Compared with HG+NC group, the relative expression of pERK1/2 protein in HG+siNodal group was significantly decreased, and the difference was statistically significant (F=44.462, P<0.01). Conclusions Silencing Nodal expression can inhibit proliferation, migration and tube formation of RF/6A cells induced by high glucose. It may act by inhibiting pERK1/2 expression.

Citation: Cao Jingjing, Kou Zhenyu, Wang Qing, Zhuang Tongtong, Dong Lijie, Wang Linni. Silencing Nodal inhibits the biological behavior of retinal vascular endothelial cells under high glucose conditions. Chinese Journal of Ocular Fundus Diseases, 2024, 40(2): 136-141. doi: 10.3760/cma.j.cn511434-20230423-00181 Copy

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