Quercetin Attenuates Benzo(α)pyrene-induced CYP1A Expression

<正>We studied effects of nutrient quercetin on cytochromes’Р450 1А(CYP1A)activities(measured spectrofluorimetrically using 7-ethoxy-resorufin for CYP1A1 and 7-methoxy-resorufin for CYP1A2 as substrates),on mR NA levels(measured by RT-PCR),and on DNA-binding activities(evaluated by an electrophoretic mobility shift assay)of proteins regulating CYP1A expression in untreated and benzo(α)pyrene(Ba P)-treated rats.Wistar rats     

影响医院中心注射室护理工作满意度的相关因素调查

目的对中心注射室护理工作的满意度进行调查,了解影响医院护理工作满意度的因素。方法选择2011年1～12月在中心注射室接受治疗的患者252例为研究对象,采用问卷法对患者进行调查,并分析影响注射室护理工作满意度的因素。结果接受调查的住院患者中,患者的满意度得分与患者的年龄、受教育程度、收入水平、住院科室、住院天数以及是否手术存在相关性。结论护理人员应重视和加强护理工作质量和效率,提高临床患者对护理工作的满意程度。     

Identification and proteomic profiling of exosomes in human cerebrospinal fluid

Background  

Exosomes are released from multiple cell types, contain protein and RNA species, and have been exploited as a novel reservoir for disease biomarker discovery. They can transfer information between cells and may cause pathology, for example, a role for exosomes has been proposed in the pathophysiology of Alzheimer's disease. Although studied in several biofluids, exosomes have not been extensively studied in the cerebrospinal fluid (CSF) from humans. The objective of this study was to determine: 1) whether human CSF contains exosomes and 2) the variability in exosomal protein content across individuals.     

Molecular evolutionary studies of Lassa virus nucleoprotein 2

ObjectiveTo study the virulence diversity through molecular evolution, and to provide insight on circulating antibodies.MethodsThe nucleotide sequences of 18 Lassa virus genomic RNA encoding Lassa virus nucleoprotein isolates collected from different parts of the world since the identification of the Josiah strain were obtained from the GenBank and nucleotide substitution among them studied using the computer program MEGA 4. The genetic distances among strains were predicted by pairwise nucleotide differences.ResultsThe rate of synonymous substitution was high 5.889 per nucleotide per year and nonsynonymous was higher at 49.664. The average predicted rate of synonymous and nonsynonymous using modified Nei-Gojobori (assuming transition/transversion bias=2) was 27.9 which was taken as the genetic distance between strains. The average number of synonymous sites is 150.741 while the average number of nonsynonymous sites is 392.259. The phylogenetic tree was inferred by unweighted pairwise grouping in MEGA4 and using neighbour-joining method. The time of emergence of Lassa virus was predicted to be around January 1920. However, the first human appearance of the virus was predicted to be around May (1 959±24) months. In synonymous substitution the rate of (G-T) rare was high. The nucleotide frequencies were 0.314 (A), 0.246 (T/U), 0.204 (C) and 0.235 (G). The transition/transversion ratio k₁=14.991 (purines) and k₂=69.916 (pyrimidines). The overall transition/transversion bias R=16.662 with a total of 620 position in the final data set. These figures are far higher than an earlier study using Lassa virus glycoprotein. The nucleotide diversity were also very high using the Taijima's model in MEGA 4.ConclusionsThe divergence within strains always coincides with the period of epidemic which goes to confirm that the cause of epidemic outbreak should be the emergence of new strain and also why the infection remains endemic despite circulating antibodies. A comparison with a similar study with the viral glycoprotein concludes that the glycoprotein is more suited for vaccine development.     

胆囊腺瘤和腺癌中Survivin与p53的定位表达及病理诊断意义

目的：观察胆囊腺瘤和胆囊腺癌细胞中Survivin与p53蛋白定位表达和形态特征,研究其在病理诊断及鉴别诊断中的意义。方法：采用免疫组化方法（SP法）检测25例胆囊腺瘤和53例胆囊腺癌细胞中Sur-vivin与p53蛋白的表达。结果：25例胆囊腺瘤,23例Survivin蛋白细胞浆内表达,阳性率92%;其中21例核上表达,包括＂核上核样＂表达17例、＂核上泥沙样＂表达4例;细胞浆弥漫表达2例;p53蛋白在胆囊腺瘤组织中无表达。53例胆囊腺癌,Survivin蛋白细胞浆弥漫表达,阳性率75.47%;p53蛋白细胞核内表达,核内表达率77.36%。Survivin在胆囊腺瘤和胆囊腺癌中的表达阳性率虽无显著性差异,但表达部位和形态特征显著不同。结论：Survivin在胆囊腺瘤中的＂核上核样＂和＂核上泥沙样＂表达,特异性强,有望成为胆囊腺瘤的诊断性抗体;其与p53在胆囊腺癌组织中核阳性表达、胆囊腺瘤组织中无表达这个结果相结合,构成两者在分子形态学表达的差异性,可作为胆囊腺瘤和胆囊腺癌病理鉴别诊断中的一种分子学方法,结合HE切片,基本可解决胆囊腺瘤与胆囊腺癌的病理诊断与鉴别诊断问题。     

胆囊腺瘤和腺癌中Survivin与p53的定位表达及病理诊断意义

目的:观察胆囊腺瘤和胆囊腺癌细胞中Survivin与p53蛋白定位表达和形态特征,研究其在病理诊断及鉴别诊断中的意义。方法:采用免疫组化方法(SP法)检测25例胆囊腺瘤和53例胆囊腺癌细胞中Sur-vivin与p53蛋白的表达。结果:25例胆囊腺瘤,23例Survivin蛋白细胞浆内表达,阳性率92%;其中21例核上表达,包括"核上核样"表达17例、"核上泥沙样"表达4例;细胞浆弥漫表达2例;p53蛋白在胆囊腺瘤组织中无表达。53例胆囊腺癌,Survivin蛋白细胞浆弥漫表达,阳性率75.47%;p53蛋白细胞核内表达,核内表达率77.36%。Survivin在胆囊腺瘤和胆囊腺癌中的表达阳性率虽无显著性差异,但表达部位和形态特征显著不同。结论:Survivin在胆囊腺瘤中的"核上核样"和"核上泥沙样"表达,特异性强,有望成为胆囊腺瘤的诊断性抗体;其与p53在胆囊腺癌组织中核阳性表达、胆囊腺瘤组织中无表达这个结果相结合,构成两者在分子形态学表达的差异性,可作为胆囊腺瘤和胆囊腺癌病理鉴别诊断中的一种分子学方法,结合HE切片,基本可解决胆囊腺瘤与胆囊腺癌的病理诊断与鉴别诊断问题。     

时域有限差分法研究长骨中的超声导波

目的基于时域有限差分(finite-difference time-domain,FDTD)法研究长骨弹性模量对超声导波传播特性的影响,为早期骨质疲劳的超声导波检测方法提供理论依据。方法对长骨进行理论建模,并对不同弹性模量下的长骨模型进行FDTD仿真;通过对仿真数据的分析,计算出不同模式导波的相速度、群速度、中心频率及能量等特性参数。结果长骨的弹性模量与超声导波的传播特性参数密切相关,各个导波模式的相速度、群速度、中心频率和能量均随弹性模量的减小而减小,其中L(0,5)模式的变化趋势最为显著。结论超声导波的传播特性参量能够反映出长骨弹性模量的变化,进而为长骨早期疲劳诊断提供了一种可能的方法。     

2007～2009年我院口服心脑血管类中成药用药分析

目的：评价我院口服心脑血管类中成药使用情况,为临床合理用药提供参考。方法：对我院2007～2009年口服心脑血管类中成药的种类、年销售金额、用药频度（DDDs）、日均费用（DDC）等进行统计分析。结果：我院2007～2009年口服心脑血管类中成药呈上升趋势;该类药品以胶囊、片剂及滴丸为首选剂型;排序比值同步性较好。结论：我院口服心脑血管类中成药临床使用基本合理,以新剂型、疗效确切、价格低廉的中成药在临床应用中具有优势,但也存在仍需改进的地方。     

评价骨质状况及骨质疏松症的超声方法

超声方法评价骨质状况及诊断骨质疏松症是近年来医学超声领域内的研究前沿,并已取得了较大的进展。本文将近年来超声纵波评价松质骨和超声轴向传播技术评价皮质骨以及超声诊断质疏松症的研究进展进行综述,在此基础上提出了当前研究中存在的主要问题及努力的方向。