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Front Cardiovasc Med:鳖甲软脉汤通过诱导视网膜血管内皮细胞凋亡抑制糖尿病小鼠视网膜新生血管形成

2022-08-14 紫菀款冬 MedSci原创

通过体外和体内实验研究中药复方鳖甲软脉汤对增生性糖尿病视网膜病变的影响。

目的:增生性糖尿病视网膜病变(PDR)是糖尿病的主要并发症之一,主要由视网膜血管内皮细胞的异常增殖和新血管的形成引起。中药在预防和治疗PDR方面具有巨大潜力。中药复方鳖甲软脉汤(BJ)对PDR有较好的临床疗效;然而,所涉及的作用机制仍不清楚。该研究旨在通过体外和体内实验探索BJ对PDR的影响。

方法:通过喂养高脂高糖饮食腹腔注射链脲佐菌素(STZ,50 mg/kg)建立糖尿病小鼠PDR模型。糖尿病小鼠被分为5组,包括对照组(糖尿病组)、羟苯磺酸钙组(CAD,0.25g/kg·day–1)、低剂量组(LDG,1.6g/kg·day–1)、中剂量组(MDG,3.2g/kg·day–1)和高剂量组(HDG,6.4g/kg·day–1)。给药8周后,用乙醚麻醉处死小鼠,取出眼球,进行HE和PAS染色及免疫组织化学分析。

同时采用高糖暴露的人视网膜毛细血管内皮细胞(HRCEC)体外模拟PDR。CCK8法检测细胞存活率,FITC/PI双染色检测细胞凋亡率,JC-1染色检测线粒体膜电位,试剂盒检测HRCEC中的ATP浓度,DAPI进行细胞核染色,DCFH-DA检测ROS浓度,Western Blot检测相关蛋白浓度,TMT标记进行定量蛋白质组学分析。

结果:体内实验表明,BJ抑制糖尿病小鼠视网膜中无细胞毛细血管的形成,降低VEGF的表达,并增加ZO-1的水平。体外实验表明,高糖显著促进细胞活力和增殖。然而,BJ在S期通过周期阻滞抑制细胞增殖,从而导致细胞凋亡;它还增加了ROS的产生,降低了线粒体膜电位,减少了ATP的产生,还降低了p-PI3K、p-AKT和Bcl-xL的表达,但增加了Bax和p-NF-κB的表达。

结论:BJ通过诱导细胞周期阻滞和降低线粒体膜电位,抑制DR小鼠视网膜无细胞毛细血管的形成和视网膜结构的不稳定性,抑制高糖暴露的HRCEC的增殖,并诱导细胞凋亡,表明BJ具有治疗DR的潜力

 

文献来源:

Liu QP, Chen YY, Yu YY, et al. Bie-Jia-Ruan-Mai-Tang, a Chinese Medicine Formula, Inhibits Retinal Neovascularization in Diabetic Mice Through Inducing the Apoptosis of Retinal Vascular Endothelial Cells. Front Cardiovasc Med. 2022;9:959298. Published 2022 Jul 12. doi:10.3389/fcvm.2022.959298

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    2022-09-21 quxin068
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    2022-08-15 zutt
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