改良极化液对充血性心力衰竭QT离散度的影响

目的 :观察改良极化液治疗慢性充血性心力衰竭 (CHF)前后QTd、QTcd变化 ,探讨它对CHF近期预后影响。方法 :将80例住院CHF患者随机分为两组 ,A组 4 0例应用改良极化液 (葡萄糖 -胰岛素 -门冬氨酸钾镁液 )治疗 ,B组 4 0例仅静滴葡萄糖。结果 :两组患者RR间期在治疗前后比较有显著差异 (P <0 .0 1) ,A组治疗后QTd、QTcd与治疗前比较有明显缩短 (QTd分别为 90 .2± 4 0 .7与 5 0 .2± 30 .4 ,QTcd分别为 86 .4± 12 .4与 4 6 .2± 12 .4 ,P <0 .0 1) ,治疗后QTd、QTcd两组间比较有显著差异 (QTd为 5 0 .2± 30 .4与 78.9± 2 0 .2 ,QTcd为 4 6 .2± 12 .4与 70 .3± 16 .8,P <0 .0 1) ,两组间洋地黄过量中毒、恶性室性心率失常发生率比较 ,有显著性差异 (P <0 .0 5 )。结论 :改良极化液可明显缩短CHF患者QTd、QTcd ,减少洋地黄过量中毒、恶性室性心率失常发生 ,对CHF近期预后可能有改善作用     

Role of tight junctions of polarized epithelial MDCK cells in the replication of herpes simplex virus type 1

Before completion of polarization, Madin-Darby canine kidney (MDCK) cells showed high infectivity and progeny production of herpes simplex virus type 1 infection. After polarization or formation of tight junctions, the infectivity and virus replication in MDCK cells was restricted significantly. The disruption of tight junctions by depletion of Ca²⁺ resulted in increasing virus infectivity and productivity. Mechanical disruption of tight junctions by scratching the cell monolayers with injection needle allowed markedly the replication of HSV-I in the cells aligned along the injured area. In polarized MDCK cells the progeny were released preferentially from the apical surface of the cells. These data suggest that because polarized MDCK cells mimic the epithelial cell layers, this cell line is helpful for determining the factors which regulate viral transmission in the human body. © Wiley-Liss, Inc.     

Flow of cells from polar to mural trophectoderm is polarized in the mouse blastocyst

During growth of the blastocyst there is a net flow of cells from the polar to the mural trophectoderm which is presumed to be radially symmetrical. However, such a pattern of cell movement is inconsistent with findings from a recent clonal analysis. To visualize the overall flow of cells directly, the polar trophectoderm of expanding blastocysts was labelled globally with fluorescent microspheres. Following further growth, the great majority of blastocysts that remained labelled throughout the polar trophectoderm exhibited a polarized rather than radial spread of label into the mural region. This was the case regardless of the labelling technique, whether the blastocysts were grown in utero or in vitro, or had the zona pellucida removed or left on. Intriguingly, where there were two foci of spread of label into the mural trophectoderm rather than one, these were diametrically opposite each other. In further experiments, fluorescent lineage labels were used to distinguish junctional trophectoderm cells with and without an extension onto the blastocoelic surface of the inner cell mass. The location of clones formed following further blastocyst growth provided no evidence that egress of cells from the polar trophectoderm is restricted circumferentially by the presence of junctional cells having an extension.     

正交偏光镜下人体胆汁液晶光学性质的研究

本文报导了在正交偏光镜下，对人体胆汁液晶的光学性质的研究，结果表明，胆汁液晶是一种非均质体，在正交偏光镜下，呈现出特殊的干涉图样和四次消光现象，光性符号是单轴正性的，干涉色级是一级灰白，双折射率Δｎ＝０．０１１－０．０１７。     

Chemical allergy in humans: Fresh perspectives

Abstract

There is considerable interest in the immunobiological processes through which the development of allergic sensitization to chemicals is initiated and orchestrated. One of the most intriguing issues is the basis for the elicitation by chemical sensitizers of different forms of allergic reaction; that is, allergic contact dermatitis or sensitization of the respiratory tract associated with occupational asthma. Studies in rodents have revealed that differential forms of allergic sensitization to chemicals are, in large part at least, a function of the selective development of discrete functional sub-populations of CD4⁺ and CD8⁺ T-lymphocytes. Evidence for a similar association of chemical allergy in humans with discrete T-lymphocyte populations is, however, limited. It is of some interest, therefore, that two recent articles from different teams of investigators have shed new light on the role of polarized T-lymphocyte responses in the development of allergic contact dermatitis and occupational asthma in humans. The implications for understanding of chemical allergy in humans are explored in this Commentary.     

电针结合偏振光对腰椎间盘突出症患者腰腿疼痛及血清MMP-3的影响

目的：观察电针配合偏振光对腰椎间盘突出症患者腰腿疼痛的镇痛效果,以及对血清基质金属蛋白酶-3（MMP-3）含量的影响。方法：将93例腰椎间盘突出症患者,分为电针配合偏振光组（观察组）31例、电针组（对照1组）30例和偏振光组（对照2组）32例。观察组取肾俞、大肠俞、环跳、委中、承山、昆仑穴,行电针治疗,并配合偏振光照射;对照1组行电针治疗,取穴同观察组;对照2组行偏振光照射治疗。观察3组治疗前后疼痛视觉模拟评分（VAS）及血清基质金属蛋白酶（MMP-3）含量变化情况。结果：治疗15d后,3组VAS及血清MMP-3含量均较治疗前明显降低（P<0.05),且观察组更低于对照1组及对照2组（P<0.05）,对照1组与对照2组间比较差异无统计学意义。结论：电针配合偏振光为治疗腰椎间盘突出症较理想的方法,其机制可能与治疗后病变部位血清MMP-3的降低有关。     

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目的探讨偏振数码照相结合计算机辅助图像分析法评价邻面去釉后釉质脱矿程度的准确性。方法于2010年3月选取青岛大学医学院附属医院口腔外科门诊因正畸需要拔除的上颌第一前磨牙40颗,沿牙冠颊舌向磨切得到80个标本,随机分为A（空白对照,未进行任何去釉处理）、B（邻面去釉）、C（邻面去釉后使用氟化泡沫）、D（邻面去釉后使用护牙素）4组。体外pH循环60d后,用偏振数码照相结合计算机辅助图像分析法定量测量各组标本邻面去釉及再矿化后的灰度值,以此来评价其釉质脱矿程度。同时用显微硬度仪定量测量各组标本的硬度值作为对照。结果（1）灰度值：A组灰度值最低,B组灰度值最高,C组和D组经过再矿化处理后灰度值较B组降低,差异有统计学意义（P〈0．05）。c组和A、D组之间灰度值差异无统计学意义（P〉0．05）。（2）硬度值：A组硬度值最高,B组硬度值最低,c组和D组经过再矿化处理后硬度值升高,但均较A组低。B组硬度值和其他3组之间比较,差异均有统计学意义（P〈0．05）,而A组与c组、c组与D组之间硬度值比较,差异均无统计学意义（P〉0．05）。结论偏振数码照相结合计算机辅助图像分析法得出的结果与显微硬度仪的定量检测结果相符合,表明了其是一种有效的定量评价釉质脱矿及再矿化效果的方法,值得临床推广。     

5-羟色胺再摄取抑制剂联合极化液治疗老年抑郁症患者的疗效及安全性

目的：评价5-羟色胺再摄取抑制剂（SSRIs）联合极化液对老年抑郁症的疗效及安全性。方法：69例符合国际疾病分类第10版抑郁发作诊断标准、年龄≥65岁的老年患者随机分为单用药组（单用SSRIs治疗）35例和合用药组（SSRIs＋极化液治疗）34例。疗程均为4周。采用汉密尔顿抑郁量表（HAMD-17）,汉密尔顿焦虑量表（HAMA）和临床大体印象量表（CGI）评估疗效,治疗中出现的症状量表（TESS）评估不良事件。结果：治疗4周,以合用药组HAMA总分、HAMD总分显著下降低于单用药组（F=17．28,F=10．24;P均〈0．05）。合用药组CGI严重程度评分平均（1．5±O．4）分、TESS总分平均（9．4±1．2）分均显著低于单用药组（2．3±0．1）分和（10．5±3．5）分,差异有统计学意义（P均〈0．05）。结论：SSRIs联合极化液治疗老年抑郁症较单用SSRIs的疗效好,安全性高。