血管紧张素-(1-7)研究进展

血管紧张素-(1-7)是肾素-血管紧张素系统中具有重要生物学作用的终末活性产物,可通过与其特异性受体结合而发挥改善心功能、降低血压、抑制细胞增殖、抗血栓、调节水电解质平衡等作用。现就血管紧张素-(1-7)的生成、生物学作用及其作用的受体作一综述。     

血管紧张素-(1-7)的心血管调节作用

血管紧张素-(1-7)[Ang-(1—7)]是肾素-血管紧张素系统(RAS)的新成员,在许多方面拮抗血管紧张素Ⅱ(AngⅡ),具有扩张血管、降低血压、利钠、利尿、抗增生及抗炎症等作用。其作用由特异性受体介导,与缓缴肽、一氧化氮及.PGI2有关。新近发现的血管紧张素转换酶2(ACE2)与Ang-(1-7)构成RAS的一轴即ACE2-Ang-(1-7)轴,与另外一轴即ADE-AngⅡ轴是对立统一的关系,两轴间的平衡对维持心血管、泌尿、生殖等系统的正常功能起重要作用。     

血管紧张素-(1-7)的心血管调节作用

血管紧张素-(1-7)是肾素血管紧张素系统家族中的新成员,近来研究提示其有抗高血压、抑制血管平滑肌增殖和心肌细胞肥大、影响心脏神经电生理、抗血栓形成、调节水、电解质代谢平衡等作用,是血管紧张素Ⅱ(AngⅡ)的内源性拮抗剂。     

血管紧张素-(1-7)与脂质代谢研究进展

脂质代谢是人体主要代谢之一,包括脂肪代谢、胆固醇代谢和磷脂代谢。脂质代谢紊乱主要为甘油三酯、总胆固醇、低密度脂蛋白胆固醇升高,以及高密度脂蛋白胆固醇降低,是引发急性冠脉综合征和脑卒中等心脑血管疾病的重要原因。血管紧张素-(1-7)作为肾素-血管紧张素系统中一种新的生物活性肽,近年来被国内外学者研究发现,其在降压、抗心肌纤维化、抗心律失常和改善动脉粥样硬化等心血管疾病中发挥作用,同时研究发现,血管紧张素-(1-7)通过抑制脂肪合成,促进脂肪分解,改善脂肪变性和调节胆固醇转运等参与脂质代谢。现就血管紧张素-(1-7)与脂质代谢的研究进展做一综述。     

血管紧张素-(1-7)在心血管系统中的作用

血管紧张素-(1-7)是肾素-血管紧张素系统中具有重要生物学作用的终末活性产物,可通过直接作用于心血管中枢调节心血管活动以及与心脏和血管上特异性受体结合而发挥改善心功能、降低血压、抑制心脏和血管重构作用.现就血管紧张素-(1-7)对心血管系统中的作用综述如下.     

由血管紧张素(1-7)重新认识RAS系统

对血管紧张素 (1- 7)的研究使我们对肾素 -血管紧张素系统 (RAS)有了更全面的认识。血管紧张素 (1-7)通过特异性的受体发挥生理作用。血管紧张素Ⅰ和血管紧张素Ⅱ经过特异的肽链内切酶变为血管紧张素 (1 -7) ,再经血管紧张素转换酶作用降解为无活性的血管紧张素 (1- 5 )。血管紧张素 (1- 7)具有抗增殖、扩张血管、抗氧化应激及促进纤溶的作用。     

血管紧张素(1-7)对心血管保护作用的研究进展

血管紧张素(1-7)是血管紧张素家族中一个新成员,它通过血管紧张素转换酶Ⅱ/血管紧张素(1-7)/Mas受体轴发挥作用。血管紧张素(1-7)作为血管紧张素Ⅰ的主要活性产物,对调节血管紧张素Ⅱ水平,尤其是组织血管紧张素Ⅱ的水平起着一定的作用。它通过激肽、一氧化氮、前列腺素产生与血管紧张素Ⅱ完全不同的作用。这些提示血管紧张素(1-7)可能是肾素-血管紧张素系统调节自身活性的重要物质。近期研究发现血管紧张素(1-7)具有保护心室心肌功能,降低缺血再灌注损伤和氧化应激,调节神经压力反射,降低血压和舒张血管,抗增殖、抗纤维化和抗炎症反应,以及调节血脂、脂肪细胞代谢、保护糖尿病所致心肌损害等心血管保护作用,现就这些保护作用的新进展做一综述。     

血管紧张素-(1-7)与血管紧张素Ⅱ在心肌缺血/再灌注损伤中的作用

目的 :探讨血管紧张素 (1 7) [Ang (1 7) ]与血管紧张素Ⅱ (AngⅡ )在心肌缺血 再灌注损伤中的作用。方法 :离体大鼠心脏置于Langendorff装置上 ,采用主动脉逆灌法 ,结扎左冠状动脉前降支 15min后 ,剪断丝线再灌流 30min ,造成心肌缺血 再灌注损伤模型。在缺血期和再灌注期分别用含有Ang (1 7)或AngⅡ的缓冲液灌注 ,浓度均为 1.0nmol L ,观察它们对再灌注期室性心律失常、左室收缩压 (LVSP)及冠状动脉流量的影响。结果 :AngⅡ明显增加再灌注期室性心律失常程度记分 ,不利于再灌注期冠状动脉流量和LVSP的恢复 ;而Ang (1 7)可减少再灌注期室性心律失常程度记分 ,促进再灌注期冠状动脉流量的恢复 ,并能预防再灌注期LVSP进一步下降。一氧化氮合酶抑制剂L 硝基精氨酸甲酯可阻断Ang (1 7)对再灌注期冠状动脉流量的影响 ,但不能改变其对再灌注期心律失常及LVSP的影响。结论 :外源性Ang (1 7)在心肌缺血 再灌注损伤中的作用不同于AngⅡ ,能减少缺血再灌注损伤。它对再灌注期冠状动脉流量的影响可能与一氧化氮的合成与释放有关     

血管紧张素1-7与心血管疾病的关系

血管紧张素1-7是一种具有重要生物学作用的血管紧张素家族的终末活性产物,其通过受体介导表现为舒张血管、降低血压、利尿、利钠和抑制平滑肌增殖等作用,为临床心血管疾病的防治提供了新的思路.本文就血管紧张素1-7的生化、生理特性及其与心血管疾病的关系作一扼要综述.     

血管紧张素受体阻滞剂在冠状动脉支架置入术后再狭窄中的研究进展

随着冠状动脉支架置入术的深入开展,支架置入术后再狭窄受到更多关注。肾素-血管紧张素系统在支架内再狭窄的发生中具有重要作用。血管紧张素受体选择性的不同,直接参与支架内再狭窄的发展。通过对于血管紧张素受体的选择性阻断,可延缓支架置入术后冠状动脉再狭窄的程度,对预防冠状动脉支架置入术后再狭窄具有重要意义。     

骨保护素与冠心病合并糖尿病患者冠状动脉支架内再狭窄的关系

目的探讨血清骨保护素(OPG)与冠心病合并糖尿病患者冠状动脉介入术后支架内再狭窄(ISR)的关系。方法在行经皮冠状动脉介入治疗并于约1年后行冠状动脉造影复查的1 652例糖尿病患者中,135例为ISR患者(ISR组),从其余患者中随机选取85例无ISR的冠心病合并糖尿病患者作为对照(无ISR组)。检测血清OPG水平及生物化学指标,并收集患者的临床资料。通过多变量Logistic回归分析发生ISR的独立危险因素。结果 ISR组血清OPG水平显著高于无ISR组(P<0.001)。与无ISR组相比,ISR组患者的吸烟发生率更高,血清肌酐、总胆固醇、高敏C反应蛋白、低密度脂蛋白胆固醇水平更高,冠状动脉病变更严重,累及的血管更多,肾小球滤过率更低,使用降糖药物治疗患者更少,支架直径更小(P均<0.05)。将血清OPG水平按三分位数分组,在校正了可能的混杂因素后,多变量Logistic回归分析显示血清OPG高水平组发生ISR的风险是低水平组的5.349倍(OR=5.349,95%CI为2.049～13.967,P=0.001),中水平组发生ISR的风险是低水平组的2.711倍(OR=2...     

血浆总胆红素浓度与经皮冠状动脉介入治疗后支架内再狭窄的研究

目的探讨冠状动脉粥样硬化性心脏病（冠心病）患者血浆总胆红素（total bilirubin,TBIL）浓度与冠状动脉支架内再狭窄的关系。方法选择241例接受经皮冠状动脉介入（percotaneous coronary intervention,PCI）治疗以及术后1年内再次接受冠状动脉造影（CAG）检查的患者,根据影像结果分为再狭窄组和非再狭窄组,分别在PCI治疗前、出院前及复查冠状动脉造影前测定血浆TBIL浓度。比较分析两组相应的TBIL浓度。结果再狭窄组PCI治疗前、出院前及复查冠状动脉造影前的TBIL浓度与非再狭窄组分别进行比较,差异有统计学意义（P〈0．05）。多因素Logistic回归分析结果显示,血浆TBIL浓度是预测再狭窄的独立危险因子（P〈0．05）。结论血浆TBIL浓度与PCI治疗后再狭窄密切相关．是预测PCI治疗后再狭窄的独立预测因子。     

长链非编码RNA牛磺酸上调基因1与冠状动脉支架内再狭窄的相关性

目的:探讨长链非编码RNA(LncRNA)牛磺酸上调基因1(TUG1)在冠状动脉(冠脉)支架内再狭窄(ISR)患者外周血中的表达水平,研究TUG1对支架内再狭窄的诊断价值。方法:选取2019年5月-2021年6月于济宁医学院附属医院心内科住院且既往置入过冠脉支架的患者,入院复查冠脉造影评估冠脉支架是否狭窄,根据冠脉造影结果分为支架内再狭窄(ISR)组(26例)和支架内非狭窄(N-ISR)组(26例)。首先收集患者外周血,用单核细胞分离液提取单核细胞,从上述细胞中提取RNA,然后采用实时荧光定量聚合酶链式反应(qRT-PCR)法检测LncRNA TUG1表达水平;采用多因素logistic回归分析研究ISR患者的独立危险因素,采用受试者工作特征曲线(ROC曲线)来评估TUG1对ISR的诊断价值。结果:ISR组TUG1表达量高于N-ISR组[(0.1982±0.2276)∶(0.0704±0.0869),P<0.05],差异有统计学意义。多因素logistic回归分析表明,TUG1为ISR的独立危险因素(OR=1.934,95%CI1.017~3.677,P=0.044)。TUG1的ROC曲线下面积为0.703,灵敏度为65.4%,特异度为73.1%。结论:ISR组患者TUG1的表达水平增高。高表达的TUG1是ISR的独立危险因素,TUG1可能是预测经皮冠脉介入治疗术后发生ISR的新型生物标志物。     

长链非编码RNA牛磺酸上调基因1与冠状动脉支架内再狭窄的相关性

目的:探讨长链非编码RNA(LncRNA)牛磺酸上调基因1(TUG1)在冠状动脉(冠脉)支架内再狭窄(ISR)患者外周血中的表达水平,研究TUG1对支架内再狭窄的诊断价值。方法:选取2019年5月-2021年6月于济宁医学院附属医院心内科住院且既往置入过冠脉支架的患者,入院复查冠脉造影评估冠脉支架是否狭窄,根据冠脉造影结果分为支架内再狭窄(ISR)组(26例)和支架内非狭窄(N-ISR)组(26例)。首先收集患者外周血,用单核细胞分离液提取单核细胞,从上述细胞中提取RNA,然后采用实时荧光定量聚合酶链式反应(qRT-PCR)法检测LncRNA TUG1表达水平;采用多因素logistic回归分析研究ISR患者的独立危险因素,采用受试者工作特征曲线(ROC曲线)来评估TUG1对ISR的诊断价值。结果:ISR组TUG1表达量高于N-ISR组[(0.1982±0.2276)∶(0.0704±0.0869),P<0.05],差异有统计学意义。多因素logistic回归分析表明,TUG1为ISR的独立危险因素(OR=1.934,95%CI1.017~3.677,P=0.044)。TUG1的ROC曲线下面积为0.703,灵敏度为65.4%,特异度为73.1%。结论:ISR组患者TUG1的表达水平增高。高表达的TUG1是ISR的独立危险因素,TUG1可能是预测经皮冠脉介入治疗术后发生ISR的新型生物标志物。     

残余胆固醇与LDL-C达标的冠心病患者PCI术后支架内再狭窄的相关性

目的：探讨低密度脂蛋白胆固醇（LDL-C）达标的冠心病PCI术后患者远期支架内再狭窄（ISR）的危险因素及其与残余胆固醇（RC）的相关性。方法：采用病例对照研究方法，选择2015年01月至2022年10月于宜兴市人民医院心内科住院的冠心病患者共239例，所有患者均为支架植入术后复查冠状动脉造影；入院次日空腹检测血常规、血生化等指标。根据住院期间冠脉造影结果分为ISR组和non-ISR组。采用IBM SPSS Statistics 16.0软件进行分析，根据不同数据类型分别使用t检验，Mann-whitney 检验或Kruskal-Wallis秩和检验；相关分析采用Spearman相关分析法；绘制ROC曲线确定RC的最佳截断值；采用多因素二分类Logistic回归分析ISR的相关危险因素。结果：两组间一般资料比较显示，non-ISR与ISR组在性别、高血压、支架植入时间、TG、HDL-C、LDL-C、Lp-a均无明显差异，无统计学意义（p＞0.01），而年龄、糖尿病、吸烟、TC、RC、多支病变、支架个数、支架总长度在两组间有统计学意义（p＜0.05）。计算RC四分位间距，根据四分位间距分为四组（Q1-Q4），四组间ISR的发病率分别为20%、14.8%、22%、40.7%，有统计学意义（p＜0.05）；进一步采用Spearman相关分析发现，RC与ISR存在相关，相关系数为0.179，p＜0.05；受试者工作曲线（ROC）分析表明，RC的ROC为0.636（95%CI 0.572~0.697，p＜0.05）。通过计算约登指数，得出RC的最佳阶段点为0.47mmol/L，对应的灵敏度和特异度分别为51.72%，75.14%；二分类logistic回归分析：年龄、吸烟、多支病变、支架总长度以及RC＞0.47mmol/L是ISR的危险因素（p＜0.05），其中RC＞0.47mmol/L的患者发生ISR的风险是≤0.47mmol/L的患者的3.416倍（p=0.003）。结论：在LDL-C达标的PCI术后的冠心病患者中，RC与ISR存在相关性，且RC是PCI术后发生ISR的独立危险因素。     

The effectiveness of Salvianolate injection for in-stent restenosis after percutaneous coronary intervention: A protocol for systematic review and meta-analysis

Background:In-stent restenosis (ISR) caused by vascular remodeling after percutaneous coronary intervention limits the long-term efficacy of this method. Salvianolate injection is now widely used in the clinical treatment of ISR. However, there is no systematic review or meta-analysis to evaluate the effects of Salvianolate injection on ISR.Methods:We will search articles in 8 electronic databases, including the Cochrane Central Register of Controlled Trials, PubMed, Embase, the Web of Science, China National Knowledge Infrastructure, the Chinese Biomedical Literature Database, Wanfang Database, and the Chinese Scientific Journal Database for randomized controlled trials of ISR treated by Salvianolate injection from their inception to February 27, 2022. The primary outcome measure will be the restenosis rate. The data meeting the inclusion criteria were analyzed by RevMan V.5.4 software. Two authors evaluated the study using the Cochrane collaborative risk bias tool. We will use a scoring method to assess the overall evidence supporting the main results.Results:This study will analyze the clinical effectiveness of Salvianolate injection in the treatment of ISR.Conclusion:The findings of this systematic review will provide evidence to evaluate the effectiveness of Salvianolate injection for the treatment of ISR.INPLASY registration number:INPLASY202220117.     

预测高血压合并冠心病PCI术后支架内再狭窄nomogram模型的建立与验证

[目的]分析高血压合并冠心病经皮冠状动脉介入治疗(PCI)术后支架内再狭窄(ISR)的危险因素,并构建nomogram预警模型。[方法]选取阜阳市第二人民医院2020年6月—2022年3月收治的182例高血压合并冠心病PCI术后患者作为研究对象,根据术后是否发生ISR将其分为ISR组(n=42)和非ISR组(n=140)。分析所选患者的临床资料,采用单因素分析、LASSO和Logistic回归分析筛选高血压合并冠心病PCI术后发生ISR的危险因素,根据危险因素构建nomogram预警模型并进行拟合优度检验。[结果]本研究共纳入182例高血压合并冠心病PCI术后患者,发生ISR有42例,发生率为23.08%;单因素分析、LASSO回归分析显示,两组糖尿病、长期吸烟、支架直径、支架长度、高尿酸、高敏C反应蛋白(hs-CRP)、血清淀粉样蛋白A(SAA)及脂蛋白(a)水平差异有统计学意义(P<0.05)。Logistic回归分析显示,糖尿病(OR=4.464,95%CI:1.733～11.498,P=0.002)、长期吸烟(OR=4.648,95%CI:1.812～11.921,P=0...     

Predictive value of inflammatory factors on coronary restenosis after percutaneous coronary intervention in patients with coronary heart disease: A protocol for systematic review and meta-analysis

BackgroundEvidence reveals that inflammatory factors can predict coronary restenosis in patients suffering from coronary heart disease (CHD) after percutaneous coronary intervention (PCI). Perhaps, inflammatory factors are promising biomarkers for the diagnosis of coronary restenosis after PCI. However, the accuracy of inflammatory factors has not been systematically evaluated. Therefore, it is necessary to perform a meta-analysis to certify the diagnostic values of inflammatory factors on coronary restenosis after PCI.MethodsChina National Knowledge Infrastructure (CNKI), Wanfang, VIP, China Biology Medicine disc (CBM), PubMed, EMBASE, Cochrane Library and Web of Science were searched for relevant studies to explore the potential diagnostic values of inflammatory factors on coronary restenosis after PCI from inception to January 2021. All data were extracted by 2 experienced researchers independently. The risk of bias about the meta-analysis was confirmed by the Quality Assessment of Diagnostic Accuracy Studies-2 (QUADAS-2). The data extracted were synthesized and heterogeneity was investigated as well. All of the above statistical analyses were carried out with Stata 16.0.ResultsThe results of this meta-analysis will be submitted to a peer-reviewed journal for publication.ConclusionThis study clarified confusions about the specificity and sensitivity of inflammatory factors on coronary restenosis after PCI, thus further guiding their promotion and application.Ethics and disseminationEthical approval will not be necessary since this systematic review and meta-analysis will not contain any private information of participants or violate their human rights.Trial Registration Number:DOI 10.17605/OSF.IO/N28JX.     

Predictive value of LncRNA on coronary restenosis after percutaneous coronary intervention in patients with coronary heart disease: A protocol for systematic review and meta-analysis

Background.Evidence shows that long-stranded non-coding RNA (LncRNA) can predict coronary artery restenosis in patients suffering from coronary heart disease after percutaneous coronary intervention, suggesting that LncRNA may become a promising biomarker for the diagnosis of coronary artery restenosis after percutaneous coronary intervention. However, its accuracy has not been systematically evaluated. Therefore, it is necessary to perform meta-analysis to certify the diagnostic value of LncRNA on coronary artery restenosis after percutaneous coronary intervention.Methods.PubMed, EMBASE, Cochrane Library, and Web of Science were searched for relevant studies to explore the potential diagnostic values of LncRNA on coronary artery restenosis after percutaneous coronary intervention from inception to December 2020. Data were extracted by two experienced researchers independently. The risk of bias about the meta-analysis was confirmed by the Quality Assessment of Diagnostic Accuracy Studies-2 (QUADAS-2). Data was synthesized and heterogeneity was investigated as well. All of the above statistical analysis was carried out with Stata 14.0.Results.This study proved the pooled diagnostic performance of LncRNA on coronary artery restenosis after percutaneous coronary intervention.Conclusion.This study clarified confusions about the specificity and sensitivity of LncRNA on coronary artery restenosis after percutaneous coronary intervention, thus further guiding their promotion and application.Ethics and dissemination.Ethical approval is not required for this study. The systematic review will be published in a peer-reviewed journal, presented at conferences, and shared on social media platforms. This review would be disseminated in a peer-reviewed journal or conference presentations.OSF registration number:DOI 10.17605/OSF.IO/4QT2P.     

Predictive value of miRNA-21 on coronary restenosis after percutaneous coronary intervention in patients with coronary heart disease: A protocol for systematic review and meta-analysis

Background:Evidence reveals that microRNA (miRNA) can predict coronary restenosis in patients suffering from coronary heart disease (CHD) after percutaneous coronary intervention (PCI). Perhaps, miRNA-21 is a promising biomarker for the diagnosis of coronary restenosis after PCI. However, the accuracy of miRNA-21 has not been systematically evaluated. Therefore, it is necessary to perform meta-analysis to certify the diagnostic values of miRNA-21 on coronary restenosis after PCI.Methods:China National Knowledge Infrastructure, Wanfang, VIP, and China Biology Medicine disc, PubMed, EMBASE, Cochrane Library, and Web of Science were searched for relevant studies to explore the potential diagnostic values of miRNA-21 on coronary restenosis after PCI from inception to January 2021. All data were extracted by 2 experienced researchers independently. The risk of bias about the meta-analysis was confirmed by the Quality Assessment of Diagnostic Accuracy Studies-2. The data extracted were synthesized and heterogeneity was investigated as well. All of the above statistical analyses were carried out with Stata 16.0.Results:This study proved the pooled diagnostic performance of miRNA-21 on coronary restenosis after PCI.Conclusion:This study clarified confusions about the specificity and sensitivity of miRNA-21 on coronary restenosis after PCI, thus further guiding their promotion and application.Ethics and dissemination:Ethical approval is not required for this study. The systematic review will be published in a peer-reviewed journal, presented at conferences, and shared on social media platforms. This review would be disseminated in a peer-reviewed journal or conference presentations.OSF Registration Number:DOI 10.17605/OSF.IO/356QK.