Front Pharmacol:四妙勇安汤治疗糖尿病视网膜病变的网络药理学与体内结合研究

2022-04-17 紫菀款冬 MedSci原创

结合网络药理学和体内实验证据,探讨四妙勇安汤对糖尿病视网膜病变的保护作用,并进一步揭示其作用机制。

背景:糖尿病视网膜病变(DR)是糖尿病引起的最常见的微血管并发症,已成为致盲的最重要原因之一。根据中医理论,DR的发病机制主要是由阴虚火旺灼伤津液,致使血瘀水停

四妙勇安汤(SMYAD)出自清代《验方新编》,具有清热解毒,活血止痛之效,传统上用于治疗疮痛、痈肿和溃疡。现代广泛用于周围血管疾病的治疗,如血栓闭塞性脉管炎。之前的临床研究表明,SMYAD改善了糖尿病患者DR和其他一些糖尿病血管并发症,然而SMYAD的DR保护机制尚不清楚。

目的:结合网络药理学和体内实验证据,探讨SMYAD对DR的保护作用,并进一步揭示其作用机制。

方法:45只雄性C57BL/6小鼠腹腔注射链脲佐菌素(STZ,55 mg/kg)诱导糖尿病,对照组的15只小鼠注射生理盐水。7天后,将血糖浓度超过16.7 mmol/L的小鼠视为糖尿病小鼠,纳入研究。将糖尿病小鼠随机分为:DM、DM + SMYAD (1.5 g/kg)和DM + SMYAD (4.5 g/kg),每组15只小鼠。1个月后,小鼠灌胃SMYAD(1.5、4.5 g/kg,灌胃),持续1个月,随后处死小鼠采血并取眼。

通过Evan’s蓝渗漏试验、检测紧密连接(TJ)蛋白表达、计数视网膜脱落细胞毛细血管数量,观察血视网膜屏障(BRB)功能障碍。

网络药理学分析筛选可能通路,免疫荧光染色、qPCR、Western Blot、ELISA进行验证。

结果:经治疗,糖尿病小鼠视网膜中升高的Evan’s蓝色染料渗漏量减少,视网膜claudin1和claudin19(两种典型的紧密连接蛋白)的表达下降增强,视网膜中以黑色箭头标记的脱细胞毛细血管数量减少,表明SMYAD减轻了体内BRB功能障碍。

网络药理学结果表明,调节炎症、免疫反应和血管生成可能与SMYAD缓解DR的疗效有关,其中肿瘤坏死因子(TNF)缺氧诱导因子1 (HIF1)信号通路参与。其次,免疫荧光染色结果显示,SMYAD降低了视网膜小胶质细胞的激活,降低了白细胞对视网膜血管的增强粘连。SMYAD降低了升高的血清TNF-α含量和视网膜TNF-α表达。SMYAD可抑制视网膜NF-κB和HIF1α的激活,从而降低某些促炎分子和血管内皮生长因子(VEGF)的表达。

结论:该研究首次在体内证明了SMYAD在DR上的缓解作用。结合网络药理学和体内实验验证的结果,发现SMYAD通过抑制NF-κB和HIF1α-VEGF/VEGFR2信号通路,抑制炎症和血管生成,从而改善DR。

不足的是,目前的网络药理学数据库还不能包含所有参与DR发展的信号分子,可能还有其他一些重要的分子在此次研究中没有发现,需要在未来进一步深入探索。该研究为今后SMYAD在DR患者中的临床应用提供了实验依据。

文献来源:

Du A, Xie Y, Ouyang H, et al. Si-Miao-Yong-An Decoction for Diabetic Retinopathy: A Combined Network Pharmacological and In Vivo Approach. Front Pharmacol. 2021;12:763163. Published 2021 Nov 26. doi:10.3389/fphar.2021.763163

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    2022-10-12 yb6560
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    2022-06-28 jj000001
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    2022-04-18 ms5000000518166734

    学习学习学习学习学习学习学习学习学习学习学习学习学习学习学习学习学习学习学习学习学习学习学习学习

    0

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    2022-04-16 zutt
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