Long-term hypertension and vascular remodeling, in which microcirculation is the first to suffer,and which cause microvascular sparse. Treatment of hypertension on thereversal of vascular remodeling has become one of the hotspots in vascular biology. Liver yang hyperactivity hypertension accounting for a significant proportion in essential hypertension.The Tianmagouteng drink can treat liver yang hyperactivity hypertension by calming liver yang. The PI3K/Akt pathway is a classic-mediated cell survivalpathway, GSK-3β plays an important role in the regulation of cell growth, differentiation, mutation, and apoptosis activities. Studies have shown that essential hypertension is related to imblance of vascular smooth muscle proliferation, acceleration and inhibition of apoptosis. The mechanism of tianmagouteng drink improving hypertension microcirculation is not clear yet. Therefore,we assume that Tianmagouteng drink can regulate the PI3K/Akt signaling pathway, regulate the Bcl-2/Bax protein, inhibition the apoptosis of vascular smooth muscle cells, improve the status of hypertensive vascular smooth muscle cell proliferation and apoptosis imbalance, reducing the the blood vessels'changes by stress. So we reveal the test hypotheses through the research on capillaries, pathology, protein and signaling pathway of SHR rats . That we can reveal the mechanism of Chinese medicine treat of liver yang hypertension by calming liver yang and provide a basis for further research.
长期高血压导致血管重塑,微循环在其中最先受损,出现微血管稀疏。治疗高血压对逆转血管重构的研究已成为血管生物学研究的热点之一。肝阳上亢型高血压在原发性高血压中占有很大的比例。天麻钩藤饮是平肝潜阳治疗肝阳上亢型高血压的有效方剂。PI3K/Akt通路是介导细胞存活的一条经典通路,GSK-3β在细胞的生长、分化、突变和凋亡等活动中具有重要的调控作用。而研究显示原发性高血压与血管平滑肌的增殖加速与凋亡抑制失衡有关。天麻钩藤饮对于改善高血压微循环及其作用机制尚不明确。根据前期研究建立假说,从天麻钩藤饮调节PI3K/Akt信号通路及Bcl-2/Bax蛋白,抑制血管平滑肌细胞凋亡,改善高血压时血管平滑肌增殖与凋亡失衡的状态,减少血管应力改变,从而发挥降压作用,并通过对SHR大鼠的微血管、病理、蛋白及信号通路的研究来揭示验证假说。揭示平肝潜阳中药治疗肝阳上亢型高血压的机理并为进一步研究提供基础。
高血压是一种以体循环动脉压增高为主要特点的临床综合征。主要以头痛、头晕、失眠、烦躁易怒、乏力为常见症状。祖国医学没有高血压病的病名,而将之列入“眩晕”等范畴。高血压的病因病机为风火痰瘀等实邪在体内日久化火化热,扰乱肝阳,气火上逆所致的肝火上炎;或者患者体内阴虚,用阳太过,阳亢耗阴所致的肝阳上亢。流行病学调查和临床实践显示,肝阳上亢型高血压占有很大的比例。天麻钩藤饮,有平肝潜阳之功。大量的临床证据表明,天麻钩藤饮治疗肝阳上亢型高血压有显著疗效。. 结果表明:(1)对SHR灌胃2周附子汤2g/(kg·d)的剂量体重、血压、痛阈变化最为适中;心脏超声、脏器系数、血浆AngⅡ和ALD含量变化不明显;脑组织5-HT mRNA表达下降。(2)天麻钩藤饮可以使SHR大鼠血压降低,痛阈升高,肝脏PPARγ mRNA和蛋白含量增高,肾脏PI3K、Akt mRNA表达均明显上调。结论:一方面利用梯度浓度的附子汤,制备肝阳上亢证动物模型,建立动物模型评价量表,确立了肝阳上亢证动物模型的评价标准。另一方面,研究了中药汤剂天麻钩藤饮对肝阳上亢型高血压的影响,证明了天麻钩藤饮的疗效。并阐明了天麻钩藤饮可能的作用机理。天麻钩藤饮对PPARγ具有正向调节的作用,这可能是其治疗肝阳上亢证的作用途径之一;另外,对PI3K/Akt信号通路也有一定的影响,推测PI3K/Akt信号通路也是天麻钩藤饮的可能作用机制之一。第三本课题培养硕士一名,发表论文两篇。
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数据更新时间:2023-05-31
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