化瘀祛痰方通过调控HIF-1α/VEGF/VEGFR-2通路影响动脉粥样硬化家兔主动脉脂质斑块
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(辽宁中医药大学1.实验动物中心,;2.研究生学院,;3.中医脏象理论及应用教育部重点实验室 辽宁省中医转化医学研究中心,辽宁省沈阳市 110847;4.辽宁中医药大学附属医院,辽宁省沈阳市 110032)

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王健,硕士,助理实验师,研究方向为中医药防治动脉粥样硬化分子生物学机制,E-mail为13889342896@163.com。

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国家自然科学基金(81774022,81603513);百千万人才(2017-58)辽宁省高等学校优秀人才支持计划(LR2015041)


Effect of Huayu Qutan recipe on aortic lipid plaque in atherosclerotic rabbits by regulating HIF-1α/VEGF/VEGFR-2 pathway
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1.Laboratory Animal Center, ;2.Graduate School, Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning 110847;3.Key Laboratory of Ministry of Education for TCM Viscera-State Theory and Applications of Liaoning University of Traditional Chinese Medicine & Translational Medicine Research Center of Traditional Chinese Medicine in Liaoning Province, Shenyang, Liaoning 110847;4.Affiliated Hospital of Liaoning University of Traditional Chinese Medicine, Shenyang, Liaoning 110032)

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    摘要:

    目的 研究化瘀祛痰方调控HIF-1α/VEGF/VEGFR-2通路对动脉粥样硬化家兔主动脉脂质斑块的影响,探讨化瘀祛痰方对动脉粥样硬化脂质斑块的作用机制。方法 将60只新西兰家兔随机分为对照组15只,实验组45只。实验组45只家兔通过免疫性内皮损伤合并高脂饲料喂养的方法制备动脉粥样硬化模型,对照组喂饲普通饲料。8周后,将实验组家兔随机分为模型组、化瘀祛痰方组及辛伐他汀组。各组给予相应药物干预,对照组、模型组给予同体积生理盐水,每天1次,连续4周后取材。全自动生化分析仪检测各组血清甘油三酯(TG)、总胆固醇(TC)、低密度脂蛋白胆固醇(LDLC)、高密度脂蛋白胆固醇(HDLC)含量;HE和油红O染色观察家兔主动脉病理形态学改变,测量内膜、中膜厚度;免疫组化法测定CD31平均光密度值;ELISA检测血清缺氧诱导因子1α(HIF-1α)和血管内皮生长因子(VEGF)含量;Western blot法检测主动脉HIF-1α、VEGF、VEGFR-2蛋白表达。结果 模型组血清TG、TC、LDLC水平较对照显著升高(P<0.01),HDLC水平显著降低(P<0.01),而化瘀祛痰方组和辛伐他汀组血清TG、TC、LDLC含量较模型组降低(P<0.05或P<0.01),HDLC含量均升高(P<0.05或P<0.01)。病理染色可见模型组主动脉内膜细胞增生,有大量泡沫细胞和脂质沉积,经化瘀祛痰方和辛伐他汀治疗后均可见明显改善。模型组内膜、中膜厚度较对照组显著增厚(P<0.01),而化瘀祛痰方组和辛伐他汀组较模型组显著减小(P<0.01)。模型组主动脉CD31平均光密度值较对照组显著升高(P<0.01),而化瘀祛痰方组和辛伐他汀组较模型组显著降低(P<0.01)。模型组血清HIF-1α和VEGF含量较对照组显著升高(P<0.01),而化瘀祛痰方组和辛伐他汀组较模型组均降低(P<0.05或P<0.01)。模型组主动脉HIF-1α、VEGF、VEGFR-2蛋白表达较对照组显著升高(P<0.01),经化瘀祛痰方和辛伐他汀治疗后,两组主动脉HIF-1α、VEGF、VEGFR-2蛋白表达水平较模型组均有显著降低(P<0.01)。结论 化瘀祛痰方稳定动脉粥样硬化脂质斑块,其机制可能与调控HIF-1α/VEGF/VEGFR-2通路抑制血管新生有关。

    Abstract:

    Aim To observe the effect of Huayu Qutan recipe on regulating the expression of HIF-1α/VEGF/VEGFR-2 pathway on the aortic lipid plaque in As rabbits and to explore the mechanism of the Huayu Qutan recipe on the atherosclerotic plaque. Methods Sixty New Zealand rabbits were randomly divided into the control group (n=15) and the experimental group (n=45). Rabbits in the experimental group were prepared as atherosclerotic rabbit model by immune-induced endothelial injury and by feeding with high-fat diet. The control group was given normal feed. After 8 weeks, the rabbits in the experimental group were randomly divided into the model group, the Huayu Qutan recipe group and the Simvastatin group. Each group was given the corresponding drug intervention; the control group and the model group were given the same volume of saline, one time a day for 4 weeks before taking materials. The levels of triglyceride (TG), total cholesterol (TC), low-density lipoprotein cholesterol (LDLC) and high-density lipoprotein cholesterol (HDLC) in serum were detected by the automatic biochemical analyzer. HE staining and the oil red O staining were used to observe the pathological changes of the aorta in rabbits. The thickness of the intima and tunica media was measured in aortic wall. Immunohistochemical method was adopted to determine CD31 mean optical density value. The contents of hypoxia inducible factor-1α (HIF-1α) and vascular endothelial growth factor(VEGF) in serum were detected by ELISA. Western blot was used to detect the expression of HIF-1α, VEGF and VEGFR-2 in the aorta. Results Compared with the control group, the levels of TG, TC and LDLC in the model group were significantly increased (P<0.01) and HDLC levels were significantly decreased (P<0.01). Compared with the model group, the levels of TG, TC and LDLC in the Huayu Qutan recipe group and the Simvastatin group were significantly decreased (P<0.05 or P<0.01), and HDLC content was significantly increased (P<0.05 or P<0.01). Compared with the control group, the thickness of intima and tunica media were significantly increased in the model group (P<0.01) . Compared with the model group, the thickness of intima and tunica media were significantly decreased in the Huayu Qutan recipe group and the Simvastatin group (P<0.01). Compared with the control group, the CD31 mean optical density value were significantly increased in the model group (P<0.01). Compared with the model group, the CD31 mean optical density value were significantly decreased in the Huayu Qutan recipe group and the Simvastatin group (P<0.01). Pathological staining showed the aortic intimal hyperplasia, a large number of foam cells and lipid deposition in the model group. After the treatment of the Huayu Qutan recipe and the simvastatin, they were significantly improved. Compared with the control group, the contents of HIF-1α and VEGF were significantly increased in the model group (P<0.01). Compared with the model group, the levels of HIF-1α and VEGF were significantly decreased in the Huayu Qutan recipe group and the Simvastatin group (P<0.05 or P<0.01). The expressions of HIF-1α, VEGF and VEGFR-2 in the aorta of the model group were significantly higher than those in the normal group (P<0.01). After treated by the Huatan Qutan recipe and the Simvastatin, the expression of HIF-1α, VEGF and VEGFR-2 in the two groups were significantly lower than those in model group (P<0.01). Conclusion The Huayu Qutan recipe stabilizes the As lipid plaque and the mechanism may be related to the regulation of HIF-1α / VEGF / VEGFR-2 pathway to inhibit angiogenesis.

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王健,贾连群,宋囡,谢思梦,陈宁,陈丝,吕晓明,张会永.化瘀祛痰方通过调控HIF-1α/VEGF/VEGFR-2通路影响动脉粥样硬化家兔主动脉脂质斑块[J].中国动脉硬化杂志,2018,26(5):445~450.

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  • 收稿日期:2017-11-02
  • 最后修改日期:2018-03-10
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  • 在线发布日期: 2018-05-31