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首页> 外文期刊>Journal of Korean medical science >Chlorogenic acid decreases retinal vascular hyperpermeability in diabetic rat model
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Chlorogenic acid decreases retinal vascular hyperpermeability in diabetic rat model

机译:绿原酸降低糖尿病大鼠模型中视网膜血管的通透性

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摘要

To evaluate the effect of chlorogenic acid (CGA), a polyphenol abundant in coffee, on retinal vascular leakage in the rat model of diabetic retinopathy, Sprague-Dawley rats were divided into four groups: controls, streptozotocin-induced diabetic rats, and diabetic rats treated with 10 and 20 mg/kg chlorogenic acid intraperitoneally daily for 14 days, respectively. Blood-retinal barrier (BRB) breakdown was evaluated using FITC-dextran. Vascular endothelial growth factor (VEGF) distribution and expression level was evaluated with immunohistochemistry and Western blot analysis. Expression of tight junction proteins, occludin and claudin-5, and zonula occludens protein, ZO-1 was also evaluated with immunohistochemistry and Western blot analysis. BRB breakdown and increased vascular leakage was found in diabetic rats, with increased VEGF expression and downregulation of occludin, claudin-5, and ZO-1. CGA treatment effectively preserved the expression of occludin, and decreased VEGF levels, leading to less BRB breakdown and less vascular leakage. CGA may have a preventive role in BRB breakdown in diabetic retinopathy by preserving tight junction protein levels and low VEGF levels.
机译:为了评估富含咖啡的多酚绿原酸(CGA)对糖尿病性视网膜病变大鼠模型视网膜血管渗漏的影响,将Sprague-Dawley大鼠分为四组:对照组,链脲佐菌素诱导的糖尿病大鼠和糖尿病大鼠分别每天腹膜内用10和20 mg / kg绿原酸处理14天。使用FITC-葡聚糖评估血视网膜屏障(BRB)的分解。血管内皮生长因子(VEGF)的分布和表达水平进行了评估,免疫组织化学和蛋白质印迹分析。还通过免疫组织化学和蛋白质印迹分析评估了紧密连接蛋白,闭合蛋白和claudin-5,小带闭合蛋白ZO-1的表达。在糖尿病大鼠中发现了BRB分解和血管渗漏增加,VEGF表达增加,occludin,claudin-5和ZO-1下调。 CGA治疗有效地保留了occludin的表达,并降低了VEGF的水平,从而减少了BRB的分解和血管的渗漏。 CGA可能通过保持紧密连接蛋白水平和低VEGF水平在糖尿病性视网膜病的BRB分解中发挥预防作用。

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