降钙素基因相关肽对血管平滑肌细胞心肌素表达及细胞表型改变的作用

目的:研究降钙素基因相关肽(CGRP)对血管平滑肌细胞(VSMCs)心肌素表达的影响及对细胞表型改变的调节作用。方法:取大鼠胸主动脉,以组织块贴壁培养法获得VSMCs,分为对照组、血管紧张素Ⅱ(AngⅡ)组(加入AngⅡ处理)、CGRP组(加入AngⅡ和CGRP处理)和CGRP8-37组(在AngⅡ和CGRP基础上加入CGRP8-37)。Western blot法检测VSMCs中心肌素及细胞表型标志蛋白α-平滑肌肌动蛋白(α-SMA)和骨桥蛋白(OPN)表达情况。结果:在VSMCs培养中,细胞心肌素表达水平随着培养时间延长逐渐降低,细胞培养48 h和72h时心肌素表达水平较基线水平显著降低(P0.05);而加入CGRP处理后,心肌素表达水平逐渐增加,与基线水平比较,加入CGRP培养后48 h和72 h时细胞心肌素水平显著增加(P0.05)。同时,在VSMCs培养48 h时,AngⅡ组细胞心肌素水平较对照组下降(P0.05),且α-SMA表达亦相应下降(P0.05),而OPN表达水平显著增加(P0.05);CGRP组VSMCs心肌素水平较AngⅡ组增加,伴随着α-SMA表达水平增加(P0.05),相反地OPN表达水平下降(P0.05);CGRP8-37组心肌素和α-SMA表达水平较CGRP+AngⅡ组降低(P0.05),而OPN表达较CGRP组增加(P0.05)。结论:CGRP通过促进VSMCs心肌素的表达而抑制细胞表型转换,使细胞维持收缩表型,且这一作用是CGRP通过与其受体结合后实现的。     

骨髓间充质干细胞移植后颈动脉损伤球囊核转录因子κBp65和增殖细胞核抗原的表达

背景：炎症反应在经皮腔内冠状动脉支架置入后再狭窄的发生中起了重要作用。近年的研究发现,骨髓间充质干细胞具有较强的免疫调节特性。然而骨髓间充质干细胞对损伤血管炎症反应影响的报道较少。目的：观察骨髓间充质干细胞移植对兔颈动脉球囊损伤后核转录因子κBp65和增殖细胞核抗原表达的影响,分析其与内膜增殖作用的相关性。方法：制作颈动脉粥样硬化狭窄兔模型36只,随机分成2组,骨髓间充质干细胞移植组球囊损伤后接受4’,6-二脒基-2-苯基吲哚标记的骨髓间充质干细胞移植,对照组球囊损伤后接受等量的PBS液注射。造模前和细胞移植后7,14,28d分别抽取外周血,ELIAS法检测血清肿瘤坏死因子α和白细胞介素6的质量浓度;细胞移植后14d取血管组织,采用免疫组织化学分析法测定局部组织核转录因子κBp65和增殖细胞核抗原的表达,细胞移植后28d对血管组织行苏木精-伊红染色检测血管形态学变化。结果与结论：细胞移植后14d骨髓间充质干细胞移植组损伤血管局部核转录因子κBp65和增殖细胞核抗原的表达均较对照组明显减少（P〈0.05）。细胞移植后7,14,28d骨髓间充质干细胞移植组血清肿瘤坏死因子α和白细胞介素6质量浓度均较对照组显著降低（P〈0.05）。细胞移植后28d骨髓间充质干细胞移植组新生内膜面积、新生内膜/中膜面积及血管狭窄率均较对照组显著降低（P〈0.05）。提示骨髓间充质干细胞可能通过抑制损伤血管核转录因子κBp65活性,减轻炎症反应进而下调增殖细胞核抗原的表达,对抑制损伤血管新生内膜的增殖可能发挥有益作用。     

重组人粒细胞集落刺激因子对兔颈动脉粥样硬化球囊损伤后再内皮化和内膜增生的影响

Objeelive To investigate the effect of rhG-CSF on mobilizing bone marrow-MSCs, reendothelialization and intima hyperplasia in carotid artery of rabbits post balloon catheter injury, nethods Rabbits were treated with rhG-CSF (25 μkg, twice daily, i. p, n =35) or saline (n =32) for 5 days, then, carotid arteries of rabbits were injured by balloon catheter. The number of peripheral MSCs was detected with FACS. The morphology of injuried artery was examined with hematoxylin and eosin stain, PCNA was determined with immunohistochemistry. Results (1) Number of peripheral MSCs was similar at baseline and significantly increased at 24 hours and peaked at 7 days and remained increased till 14 days post rhG-CSF. (2) Significant endothelial cell deletion was evidenced in the control group, while scatter endothelial cells was observed in the rhG-CSF group at 1 week post injury. Two weeks after injury, new endothelial area was significantly higher in rhG-CSF group compared to control group. At 4 weeks post injury, endothelial connection was evidenced and regularly displayed in rhG-CSF treated group. (3) PCNA-positive cells in the tunica intima were significantly lower in rhG-CSF treated rabbits at 7, 14 and 28 days compared that in control rabbits (all P ＜ 0.01). Conclusion rhG-CSF could mobilize the bone marrow-MSCs and promote re-endothelialization and attenuate intima hyperplasia post balloon catheter injury in carotid arteries of rabbits.     

腺病毒介导hRAMP1基因转染血管平滑肌细胞的增殖和凋亡

背景：外源性受体活性修饰蛋白1基因转染可能对血管平滑肌细胞增殖调控具有重要的作用。 目的：探讨腺病毒载体介导人受体活性修饰蛋白1基因对体外培养的兔血管平滑肌细胞增殖和凋亡的影响。 方法：分离培养获得兔主动脉血管平滑肌细胞,分别以携带人受体活性修饰蛋白1基因的腺病毒和空腺病毒转染后,分成人受体活性修饰蛋白1组、空病毒组和对照组。 结果与结论：腺病毒转染细胞后随时间延长,报告基因绿色荧光蛋白表达逐渐增加,72 h表达最强,感染率达80%,96 h时仍有绿色荧光蛋白表达。人受体活性修饰蛋白1组的受体活性修饰蛋白1蛋白表达增加,血管平滑肌细胞凋亡率增加,细胞增殖明显抑制,与空病毒组和对照组比较差异有显著性意义(P < 0.05)。提示人受体活性修饰蛋白1基因感染血管平滑肌细胞后明显抑制血管平滑肌细胞增殖,促进细胞凋亡。     

急性心肌梗死后室壁瘤瘤体大小对心功能影响及与冠状动脉病变的关系

目的探讨急性心肌梗死后室壁瘤瘤体大小对左心室功能影响及与冠状动脉病变关系。方法选取 2014—2017年遵义医科大学附属医院急性心肌梗死病人 82例,其中合并室壁瘤 38例为室壁瘤组,不合并室壁瘤病人 44例为无室壁瘤组,比较两组间冠状动脉病变、左心室舒张末期内径(LVEDd)、左心室射血分数(LVEF)、 N末端脑钠素前体(NT?proBNP)。采用 Gensini积分,据总评分结果将室壁瘤组分为三个亚组,即轻度狭窄(＜ 30分)、中度狭窄(30～60分)、重度狭窄(60分及以上)比较三组瘤基底部宽、瘤深、瘤体积;将室壁瘤组 Gensini积分与瘤体大小行相关性分析。将室壁瘤组分为单支病变和多支病变,两个亚组,比较两组瘤体大小。将瘤基底部宽、瘤深、瘤体积与 LVEDd、LVEF、NT?proBNP做相关性分析。结果室壁瘤组与无室壁瘤组比较,室壁瘤组主要累及左前降支(LAD)(97.37%比 79.55%,χ2＝4.499,P＝0.034)室壁瘤组 LVEDd较无室壁瘤组大［5.30(4.70,5.90)cm比 4.90(4.60,5.50)cm,Z＝-1.967,P＜0.05］室壁瘤组 LVEF较无室壁瘤,组低［(39.00±8.69)%比(49.45±11.18)%,t＝0.459,P＜0.05］。室壁瘤大小与冠脉病变程度、变支数无关(均 P＞0.05),与 Gensini积分无相关性(均 P＞冠脉病,0.05)。瘤基底宽与 LVEDd正相关(r＝0.430,P＜0.05)瘤基底宽、瘤体积与 LVEF呈负相关(r＝-0.425、-0.362,均 P＜0.05)。结论室壁瘤冠脉病变主要累及 LAD。室壁瘤组心功能较,无室壁瘤组差;室壁瘤大小与冠脉病变程度及病变支数均无关。瘤体累及范围越大、瘤体积越大,左心室越扩张,心功能越差。     

地奥心血康软胶囊对AMI患者行PCI术后血清细胞凋亡因子及其心功能的影响

目的探讨地奥心血康软胶囊对急性心肌梗死（AMI）患者血清细胞凋亡因子及其心功能的影响。方法将50例AMI患者随机分为两组,均采用AMI常规治疗;在此基础上,治疗组加服地奥心血康软胶囊,疗程均为8周。观察两组治疗前后血清Fas及其配体sFasL变化,以及心功能指标舒张末期左室前后径、收缩末期左室前后径、左室射血分数变化,并观察药物不良反应。结果与治疗前比较,两组治疗后血清sFas、sFasL均降低、心功能指标均改善（P均〈0.05）,但以治疗组血清sFas、sFasL降低明显（P均〈0.05）。结论常规疗法＋地奥心血康软胶囊治疗可减少AMI患者的细胞凋亡,改善其心功能,且临床用药安全。     

重组人粒细胞集落刺激因子对兔颈动脉粥样硬化球囊损伤后再内皮化和内膜增生的影响

Objeelive To investigate the effect of rhG-CSF on mobilizing bone marrow-MSCs, reendothelialization and intima hyperplasia in carotid artery of rabbits post balloon catheter injury, nethods Rabbits were treated with rhG-CSF (25 μkg, twice daily, i. p, n =35) or saline (n =32) for 5 days, then, carotid arteries of rabbits were injured by balloon catheter. The number of peripheral MSCs was detected with FACS. The morphology of injuried artery was examined with hematoxylin and eosin stain, PCNA was determined with immunohistochemistry. Results (1) Number of peripheral MSCs was similar at baseline and significantly increased at 24 hours and peaked at 7 days and remained increased till 14 days post rhG-CSF. (2) Significant endothelial cell deletion was evidenced in the control group, while scatter endothelial cells was observed in the rhG-CSF group at 1 week post injury. Two weeks after injury, new endothelial area was significantly higher in rhG-CSF group compared to control group. At 4 weeks post injury, endothelial connection was evidenced and regularly displayed in rhG-CSF treated group. (3) PCNA-positive cells in the tunica intima were significantly lower in rhG-CSF treated rabbits at 7, 14 and 28 days compared that in control rabbits (all P ＜ 0.01). Conclusion rhG-CSF could mobilize the bone marrow-MSCs and promote re-endothelialization and attenuate intima hyperplasia post balloon catheter injury in carotid arteries of rabbits.     

急性心肌梗死与束支传导阻滞新认识

束支传导阻滞是急性心肌梗死的心电图常见合并情况。由于束支传导阻滞显著干扰急性心肌梗死患者的心电图表现,易导致临床识别困难和误诊;且束支传导阻滞对心肌梗死患者预后具有重要的预测价值。本综述详细阐明了急性心肌梗死时合并束支传导阻滞的诊断及预后意义。     

单纯心肌桥72例临床分析

<正> 我们应用彩色多普勒超声心动图评价患者左心室舒张功能,并行24 h动态心电图筛查ST-T段缺血性改变,对单纯心肌桥与左心室舒张功能不全的相关性进行分析。