不稳定性心绞痛患者血清C-反应蛋白测定的临床意义

目的：探讨不稳定性心绞痛患者血清C-反应蛋白（CRP）测定的临床意义。方法：选择60例临床诊断为不稳定性心绞痛的患者为观察组，60例稳定性心绞痛患者为对照组。所有研究对象均采用免疫投射比浊法测定血清CRP水平，并比较其与不同类型冠心病斑块稳定性之间的关系。结果：不稳定性心绞痛患者组血清CRP水平明显高于稳定性心绞痛患者。结论：血清CRP水平与不同类型冠心病斑块稳定性有关。     

冠状动脉易损斑块的造影所见和自然发展过程

冠状动脉造影是诊断阻塞性冠状动脉疾病(CAD)的金标准。这一技术在评价多种CAD临床综合征中的应用提供了与易损性粥样斑块相关的丰富的造影数据。本文回顾了这些重要征象,包括造影检测易损性斑块的局限性,复杂斑块或“罪犯病变”的造影所见以及复杂造影病变的自然发展过程。     

Detection of yellow fever virus: a comparison of quantitative real-time PCR and plaque assay

Yellow fever virus quantitation is performed routinely by cultivation of virus containing samples using susceptible cells. Counting of the resulting plaques provides a marker for the number of infectious particles present in the sample. This assay usually takes up to 5 days before results are obtained and must be carried out under L2 or L3 laboratory conditions, depending on the yellow fever virus strain used. For clinical diagnosis of yellow fever virus infections the cell culture-based approach takes too long and is of limited practical relevance. Recently, due to its considerable sensitivity, PCR has become a promising method for virus detection. However, whilst PCR can detect virus-specific nucleic acids, it does not allow conclusions to be drawn regarding the infectious potential of the virus detected. Nonetheless, for diagnostic purposes, a rapid, specific and sensitive virus PCR is preferable. Therefore, two independent yellow fever virus-specific real-time PCR assays were established and compared the viral RNA loads to the results of a traditional plaque assay. The estimated ratio of yellow fever virus genomes to infectious particles was between 1000:1 and 5000:1; both approaches displayed a comparable precision of <45%. A significant correlation between genome number as determined by real-time PCR and the corresponding number of plaques in paired samples was found with a Pearson coefficient of correlation of r=0.88 (P<0.0001).     

Ex vivo coronary atherosclerotic plaque characterization with multi-detector-row CT

Multi-detector-row CT angiography (CTA) is a new technology that allows for non-invasive investigation of coronary atherosclerosis in patients. The relation between the morphology of atherosclerotic plaques assessed by CTA and histopathology is unknown. We investigated 11 human cadaver heart specimens. A mixture of methylcellulose and CT contrast media was injected into the coronary arteries to achieve in-vivo-like contrast enhancement within the coronary artery lumen. The morphologic pattern of atherosclerotic lesions found on CTA images and the tissue attenuation of non-calcified plaques were determined. After CTA imaging, atherosclerotic lesions in the coronary arteries were macroscopically identified and characterized histopathologically according to American Heart Association criteria. A total of 50 and 40 lesions were found macroscopically and by CTA, respectively. Thirty-three lesions could have been compared directly. The sensitivity of CTA compared with macroscopic detection of atheromas, fibroatheromas, fibrocalcified, and calcified lesions was 73, 70, 86, and 100%, respectively. The mean CT attenuation of predominantly lipid-rich and fibrous-rich plaques was significantly different (47±9 and 104±28 HU, respectively; p<0.01). Atherosclerotic coronary plaques detected by CTA may represent different stages of coronary atherosclerosis. The tissue attenuation of non-calcified plaques may allow for assessment of their predominant component.     

Excimer laser revascularisation: current indications, applications and techniques

. The ultraviolet pulsed excimer laser (308 nm wavelength) is currently the only laser approved by the FDA for percutaneous intervention in patients with ischemic coronary artery disease. The clinical presentation of the treated patients varies from stable and unstable angina to acute myocardial infarction. Potential advantages of excimer laser revascularisation in acute coronary syndromes and in ischaemic obstructive peripheral vascular disease include concomitant plaque debulking and thrombus removal; absence of systemic lytic state; shortened thrombus clearing time and facilitation of adjunct balloon angioplasty and stenting. Improved understanding of laser–tissue interactions and positive clinical outcomes through the use of safe lasing techniques have led to expansion of indications/applications for laser angioplasty. These include stent restenosis, complex lesions and thrombotic stenoses, bifurcation lesions, balloon failure, total occlusions, focal saphenous vein graft lesions and peripheral arterial obstructions. The excimer laser can be effectively utilised in patients with depressed left ventricular ejection fraction and does not require implantation of a temporary pacemaker as no-reflow phenomenon and severe arrhythmias are rarely encountered. Careful case selection, proper utilisation of equipment and incorporation of efficient lasing techniques play a crucial role in effective and safe cardiovascular laser applications.     

绿色荧光标记重组人偏肺病毒空斑形成滴度测定方法的建立

目的 建立用于绿色荧光标记的重组人偏肺病毒(GFP-rhMPV)空斑形成滴度测定方法.方法 基因组中插入绿色荧光蛋白基因的hMPV全序列cDNA质粒和主要蛋白质表达质粒转入细胞293T后获得感染性重组hMPV.GFP-rhMPV在Vero-E6细胞中连续传代提升病毒滴度并保存.将等倍稀释的重组病毒液接种常规制备的Vero-E6细胞单层,用含或不含胰酶的低熔点琼脂精凝胶覆盖细胞,孵育一定时间后,采用荧光显微镜下计数荧光空斑数和抗原抗体蓝斑形成法计算病毒滴度.结果 感染后3 d,荧光显微镜下GFP-rhMPV可在低熔点琼脂糖凝胶覆盖层下形成分界较为清晰的绿色荧光集落,接种后3 d荧光空斑相对独立,便于计数.蓝斑形成法在感染后第5天蓝斑较大,易观察.此前拯救获得的GFP-rhMPV在宿主细胞Vero-E6中的复制滴度可达1×106 PFU以上.结论 成功建立了GFP-rhMPV的空斑形成实验滴度定量检测方法,为hMPV的致病机制、防治手段研究奠定了基础.     

灵芝多糖对小鼠免疫功能的影响(英文)

灵芝Canoderma lucidum[(Leyss.ex Fr.)Karst.]是滋补强壮、扶正固本的珍贵药物,灵芝多糖是灵芝的重要有效成分之一。国内外学者的研究证实,灵芝多糖有显著的抗肿瘤作用,能显著提高小鼠腹腔巨噬细胞的吞噬功能,增强诱发的迟发过敏反应。 为了进一步观察灵芝多糖对机体免疫功能的影响,并深入探讨其作用机制,本文从以下几方面观察     

脑梗死患者颈动脉粥样硬化斑块的调查及其相关因素分析

目的　探讨脑梗死患者颈动脉粥样硬化斑块的发生及其与相关因素的关系。方法　应用HDI 5 0 0 0彩色多谱勒超声仪 ,分别对脑梗死组 (2 0 7例 )和对照组 (4 5例 )的颈动脉进行检测 ,观察颈动脉粥样硬化斑块的发生及其与血糖、血脂、血浆纤维蛋白原的关系。结果　脑梗死组颈动脉粥样硬化斑块发生率为 73.9% ,对照组为 33.3% ,二者比较差异有统计学意义 (P <0 .0 1) ;脑梗死组颈动脉粥样硬化斑块好发于分叉处 ;梗死侧颈动脉粥样硬化斑块发生率高于非梗死侧 ,二者比较差异有统计学意义 (P <0 .0 1) ;年龄、高血压、糖尿病、高胆固醇、高纤维蛋白原和低密度脂蛋白升高是脑梗死患者颈动脉粥样硬化斑块形成的危险因素。结论　颈动脉粥样硬化斑块与脑梗死之间存在着密切关系。进行颈动脉超声检查 ,对预防和治疗脑梗死具有重要意义。     

走罐疗法治疗血瘀证斑块状银屑病皮损表皮增生的临床观察

目的:观察走罐疗法对血瘀证斑块状银屑病皮损表皮厚度的影响。方法:收集2019年1月至2020年3月就诊于新疆医科大学附属中医医院皮肤科门诊及住院的80例血瘀证斑块状银屑病患者,随机分为治疗组与对照组,每组40例。治疗组采用走罐疗法,对照组采用NB-UVB治疗,共治疗4周。观察两组患者治疗前后银屑病PASI评分变化,并利用反射式共聚焦显微镜(RCM)分别检测两组患者皮损表皮厚度的变化。结果:两组治疗后PASI评分、皮损表皮厚度均显著优于治疗前(P<0.01),且治疗组PASI差值、皮损表皮厚度差值显著优于对照组(P<0.01,P<0.05)。治疗组总有效率为85.0%(34/40),显著优于对照组总有效率50.0%(20/40)(P<0.01)。结论:走罐疗法对血瘀证斑块状银屑病表皮增生的改善优于NB-UVB的治疗。