实用医学杂志 ›› 2025, Vol. 41 ›› Issue (9): 1319-1326.doi: 10.3969/j.issn.1006-5725.2025.09.007

• 基础研究 • 上一篇    

LncRNA MEG3通过调控COX-2/PGE2/VEGF信号通路对早期糖尿病大鼠视网膜的保护作用

陈梅,李宗智,秦学维,王利民,郑丽   

  1. 贵州中医药大学第一附属医院眼科 (贵州 贵阳 550001 )
  • 收稿日期:2025-02-10 出版日期:2025-05-10 发布日期:2025-05-20
  • 基金资助:
    国家自然科学基金(地区科学基金)项目(82060886);贵州省中医药管理局中医药、民族医药科学技术研究专项课题(QZYY-2019-005)

Protective effect of LncRNA MEG3 on diabetic retinopathy in rats by regulating COX⁃2/PGE2/VEGF signaling pathway

Mei CHEN,Zongzhi LI,Xuewei QIN,Limin WANG,LI ZHENG   

  1. Department of Ophthalmology,The First Affiliated Hospital of Guizhou University of Traditional Chinese Medicine,Guiyang 550001,Guizhou,China
  • Received:2025-02-10 Online:2025-05-10 Published:2025-05-20

摘要:

目的 分析长链非编码RNA母系表达基因3(LncRNA MEG3)通过调控视网膜环氧合酶-2/前列腺素E2/血管内皮生长因子(COX-2/PGE2/VEGF)信号通路对早期糖尿病大鼠视网膜的保护作用。 方法 选取SPF级50只SD大鼠,10只大鼠作为对照组,40只构建糖尿病视网膜病变模型,共有32只大鼠建模成功,分为模型组8只、阴性对照组8只、MEG3过表达组8只、MEG3过表达+COX-2抑制剂组8只。观察各组大鼠病理组织学、血管通透性、糖脂代谢、炎症因子、氧化应激指标、PGE2水平、COX-2/VEGF mRNA与蛋白相对表达量。 结果 与对照组相比,模型组HDL-C、CAT、GSH-PX、SOD降低,血管通透性、TG、TC、LDL-C、IL-6、IL-1β、TNF-α、MDA、PGE2、COX-2、VEGF mRNA、蛋白相对表达量升高(P < 0.05);与阴性对照组相比,MEG3过表达组HDL-C、CAT、GSH-PX、SOD升高,血管通透性、TG、TC、LDL-C、IL-6、IL-1β、TNF-α、MDA、PGE2、COX-2、VEGF mRNA、蛋白相对表达量降低(P < 0.05);与MEG3过表达组相比,MEG3过表达+ COX-2抑制剂组HDL-C、CAT、GSH-PX、SOD升高,血管通透性、TG、TC、LDL-C、IL-6、IL-1β、TNF-α、MDA、PGE2、COX-2、VEGF mRNA、蛋白相对表达量降低(P < 0.05)。 结论 LncRNA MEG3可通过调节COX-2/PGE2/VEGF通路,改善大鼠糖脂代谢水平,抑制炎症因子表达,降低应激反应,减轻糖尿病视网膜病变。

关键词: 糖尿病视网膜病变, 长链非编码RNA母系表达基因3, 视网膜环氧合酶-2/前列腺素E2/血管内皮生长因子信号通路, 血管通透性

Abstract:

Objective To investigate the protective effect of LncRNA MEG3 on the retina in early-stage diabetic rats through regulation of the COX-2/PGE2/VEGF signaling pathway. Methods 50 male SD rats of SPF grade were selected for the study. Among them, 10 rats were assigned to the control group, while 40 rats were used to establish diabetic retinopathy models. A total of 32 rats successfully underwent modeling and were subsequently divided into four groups (n = 8 per group): model group, negative control group, MEG3 overexpression group, and MEG3 overexpression + COX-2 inhibitor group. Histopathological changes, vascular permeability, glucose and lipid metabolism, inflammatory factors, oxidative stress indices, PGE2 levels, as well as the relative mRNA and protein expression levels of COX-2 and VEGF were evaluated in each group. Results Compared with the control group, HDL-C, CAT, GSH-PX, and SOD levels were significantly decreased, whereas the mRNA and protein expression levels of vascular permeability, TG, TC, LDL-C, IL-6, IL-1β, TNF-α, MDA, PGE2, COX-2, and VEGF were significantly increased in the model group (P < 0.05). Compared with the negative control group, HDL-C, CAT, GSH-PX, and SOD levels were significantly increased in the MEG3 overexpression group, while the mRNA and protein expression levels of vascular permeability, TG, TC, LDL-C, IL-6, IL-1β, TNF-α, MDA, PGE2, COX-2, and VEGF were significantly decreased (P < 0.05). Compared with the MEG3 overexpression group, HDL-C, CAT, GSH-PX, and SOD levels were further increased in the MEG3 overexpression + COX-2 inhibitor group, and the mRNA and protein expression levels of vascular permeability, TG, TC, LDL-C, IL-6, IL-1β, TNF-α, MDA, PGE2, COX-2, and VEGF were further decreased (P < 0.05). Conclusion LncRNA MEG3 is capable of regulating the COX-2/PGE2/VEGF pathway, enhancing glucose and lipid metabolism in rats, suppressing the expression of inflammatory factors, attenuating stress responses, and alleviating diabetic retinopathy.

Key words: diabetic retinopathy, long non-coding rna maternal expression gene 3, retinal cyclooxygenase-2/prostaglandin e2/vascular endothelial growth factor signaling pathway, vascular permeability

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