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.     

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。     

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.     

复方丹参滴丸对冠心病PCI后血液流变学的影响

目的 观察复方丹参滴丸对冠心病患者PCI后血液流变学的影响,探讨复方丹参滴丸治疗冠心病的临床实用价值.方法 选择确诊冠心病行PCI治疗的患者160例,随机分为治疗组和对照组.对照组于PCI后给予常规用药,包括阿司匹林和氯吡格雷:治疗组在此基础上加用复方丹参滴丸口服,于术前和术后3个月,检测并分析其血液流变学指标.结果 与治疗前相比,两组患者在全血粘度高切、中切和低切方面明显降低(P<0.05),且复方丹参滴丸治疗组在治疗后全血粘度低切指标下降更明显,与对照组相比,P<0.05,有统计学差异;此外,治疗组在全血还原粘度、红细胞聚集和卡松曲服应力方面与治疗前相比,亦明显降低,具有统计学差异;而对照组治疗后虽有下降趋势,但无统计学差异.与对照组相比,复方丹参滴丸治疗组治疗后在全血还原粘度和卡松曲服应力方面水平低于对照组,具有统计学差异.结论 冠心病PCI后患者在常规用药基础上加用复方丹参滴丸,可明显改善其血流动力学指标,缓解心绞痛症状,具有临床应用价值.     

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。     

体外培养间充质干细胞移植对颈动脉损伤后局部NO含量和eNOS mRNA表达的影响

目的经静脉移植MSCs治疗球囊损伤的粥样硬化颈动脉,探讨MSCs对动脉损伤后修复的影响及可能的作用机制。方法制作颈动脉粥样硬化狭窄动物模型48只,分为MSCs移植组（n=30）和对照组（n=18）。MSCs移植组于球囊损伤前经外周血采集MSCs并体外培养扩增,于球囊损伤后即刻、1周和2周经静脉移植MSCs,而对照组给予等量生理盐水。于球囊损伤后4周收集血管标本,经免疫化学染色后观察血管病理形态学特点、计算新生内膜和中膜面积、检测增殖细胞核抗原（PCNA）以及ELISA法测定局部NO含量和RT-PCR检测eNOSmRNA表达。结果血管病理形态学检测显示,MSCs移植组颈动脉内皮细胞少量缺失,但无内皮的片状剥脱,管壁部分区域轻度增厚,管腔轻度狭窄,增厚处中膜可见少量泡沫细胞沉积,部分区域伴少量纤维组织增生,呈动脉粥样硬化早中期（脂纹-纤维斑块期）改变。与对照组比较,MSCs移植组新生内膜面积（NEA）和中膜面积（MA）均明显减少（P〈0.05）;而两组间新生内膜/中膜面积比（I/M）无统计学意义。同时,血管壁PCNA测定显示：MSCs移植组PCNA阳性细胞率显著低于对照组,表明与移植组相比,对照组新生内膜增生程度更为明显。MSCs移植组损伤的颈动脉局部NO含量和eNOSmR-NA表达均明显高于对照组,差异具有统计学意义。同时,eNOSmRNA表达程度与4周时动脉内膜增生情况相关分析显示呈负相关。结论 MSCs静脉移植可明显降低球囊损伤动脉的新生内膜增生,这可能与损伤动脉局部eNOSmRNA表达和NO含量增加有关。     

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。     

急性下壁心肌梗死患者右心室功能变化的探讨

目的 应用组织多普勒(TDI)结合M型超声技术评价急性下壁心肌梗死(心梗)患者右心室功能变化. 方法 急性下壁心梗患者50例,男34例、女16例;正常对照组50例,男30例,女20例.急性心梗第4～7天行超声心动图检查,采用M型超声记录三尖瓣环右心室游离壁处运动曲线,测量收缩期、舒张早期和舒张晚期运动幅度(SD、DED和DAD)及DED/DAD比值;并应用TDI技术,记录该处速度曲线,测量右室收缩期、舒张早期和晚期最大运动速度Sm、Em和Am及Em/Am比值. 结果 急性下壁心梗患者三尖瓣环右室游离壁处SD、DED运动幅度、DED/DAD比值均较对照组显著降低[分别为(18.7±5.5)mm和(24.9±2.8)mm、(10.9±3.4)mm和(16.6±3.4)mm、1.5±0.6和2.3±0.9,t值分别为18.711、19.055、6.068,均P＜0.01]Sm、Em和Em/Am明显下降[分别为(12.9±2.8)cm/s和(15.9±2.7)cm/s、(12.3±3.4)cm/s和(16.7±4.7)cm/s、0.9±0.4和1.1±0.3,t值分别为11.851、14.781、2.127,P＜0.01或P＜0.05]. 结论 急性下壁心梗损害右室舒缩功能,表现为既有运动幅度下降又有最大运动速度下降,舒张功能降低以舒张早期性能下降为主.     

胰岛素抵抗在急性心肌梗死患者经皮冠状动脉介入治疗术后再狭窄中的作用

目的探讨胰岛素抵抗与非糖尿病患者急性心肌梗死经皮冠状动脉介入治疗(percutaneous coronary inter-vention,PCI)后再狭窄(restenosis,RS)的关系。方法非糖尿病急性心梗患者62例,据是否存在胰岛素抵抗(insulinresistance,IR)分为IR组(n=38)和非IR组(NIR组,n=24),均行PCI,每例患者植入1~2枚药物洗脱支架。采集清晨空腹静脉血,检测空腹血糖(FBG)、空腹胰岛素(FBI)、总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-c)、高密度脂蛋白胆固醇(HDL-c)、甘油三酯(TG)。用自我平衡模型分析法计算胰岛素敏感指数(insulin sensitivity index,ISI)。计算患者体质量指数(BMI)。术后6~8个月再次冠脉造影。测定冠脉病变长度和术前、支架植入后及复查造影时血管最小内径,计算RS发生率、血管管腔直径丢失值和血管内径丢失指数。结果2组患者在年龄、性别构成比、高血压患病率、BMI、血TC、TG、HDL-c、LDL-c、冠脉病变长度、支架术前最小管腔直径、支架术后即刻最小管腔直径和术后即刻管腔残留狭窄程度差异皆无统计...