四种乙型肝炎病毒表面抗体试剂盒检测人乙型肝炎病毒表面抗体效果比较

目的分析商品化试剂盒检测人乙型肝炎病毒（乙肝）表面抗体（抗-HBs）之间的差异。方法本院实验标本252份,分别用雅培I2000定量试剂盒、罗氏e601定量试剂盒、安图Auto Lumo A2000定量检测试剂盒和国内主流酶联免疫法定性试剂盒（上海科华）检测人乙肝表面抗体,以假定金标准对各厂家的阴、阳性结果进行比对分析,并对3个定量检测系统进行量值相关性分析。结果 4种乙肝表面抗体试剂与假定金标准相比,灵敏度和特异性都达到了93%以上,其中安图和罗氏的灵敏度和特异性最高,达到了98%以上;罗氏试剂盒的跃登指数（灵敏度＋特异性-100%）最高,为99.3%;与金标准比较,3种化学发光试剂盒检测结果无统计学差异（P〉0.05）,而酶联免疫法定性试剂盒检测结果有统计学差异（P〈0.05）。结论主流乙肝表面抗体试剂盒在检验乙肝表面抗体时均存在一定的假阳性或假阴性,量值相关性较好,不影响临床应用分析。     

RP-HPLC法测定止血定痛片中三七皂苷R1的含量

目的:建立反相高效液相色谱测定止血定痛片中三七皂苷R1含量的方法.方法:采用Kromasil C18(250mm×4.6mm, 5μm)柱,以乙腈-水(20:80)为流动相,流速为1.0ml·min-1,检测波长为203nm,柱温为室温;结果:三七皂苷R1在0.50～3.50μg范围呈良好的线性关系,r=0.9999;平均加样回收率为97.5%, RSD为1.6% (n=6);结论:所建立的方法快速简单,准确可靠,灵敏度高,可用于止血定痛片的质量控制.     

HPLC法测定云南红豆杉细胞悬浮培养中10-去乙酰基巴卡亭Ⅲ

目的 测定经寡聚半乳糖醛酸(oligogalacturonic acid,OGA)诱导的云南红豆杉Taxus yunnanensis细胞悬浮培养物中10-去乙酰基巴卡亭Ⅲ(10-deacetyl baccatin Ⅲ,10-DAB Ⅲ)的量.方法 采用不同质量浓度的OGA处理云南红豆杉悬浮培养细胞,通过RP-HPLC法测定细胞和培养液中的10-DAB Ⅲ的量,甲醇-乙腈-水(2∶3∶8)为流动相,检测波长为232 nm.结果 10-DAB Ⅲ在0.05～2.06 μg与峰面积线性关系良好,回归方程为y=89.146X 27.067(R2=0.999 6),细胞内、外样品平均回收率分别为94.96%、100.72%,RSD分别为0.44%、0.81%.OGA(40 μg/mL)可显著提高云南红豆杉细胞中10-DAB Ⅲ的量.结论 10-DAB Ⅲ的RP-HPLC方法 可靠简便、重现性好、灵敏度高,具有较高的实用价值,可用于对红豆杉细胞诱导培养研究中的分析,OGA是10-DAB Ⅲ细胞生产的有效诱导子.     

中医知识体系对诊法研究的重要影响

目的：探讨中医知识体系在现代诊法研究中的作用。方法：根据中医知识体系的结构和特点，对诊法研究的思路、方法进行回顾分析。结果：理解传统中医的诊法价值评价标准，提取四诊法中的核心知识，重视辨证论治体系的分层知识结构三点，是制定诊法研究的总体规划中需要重视的因素。结论：发掘中医知识体系中的合理要素，对保证诊法研究的质量和效率具有重要意义。     

112例淋巴结病变免疫球蛋白轻链限制性的检测

目的:比较原位杂交技术(In suit hybridization,ISH)和免疫组织化学方法(Immunohischemical,IHC)检测B细胞性淋巴瘤(B-cell lymphoma)和反应性增生病变(Reactive hyperplasia,RH)中免疫球蛋白轻链限制性的灵敏度和精确度.方法:收集112例淋巴结病变[B-celllymphoma(n=62)和RH(n=50)],用ISH和IHC法检测免疫球蛋白轻链κ、λ的限制性.结果:ISH法,62例B细胞性淋巴瘤轻链有限制性45例(72.58%),50例淋巴结反应性增生病变没有限制性表达.IHC法,62例淋巴瘤有轻链限制性29例(46.77%),50例反应性增生病例6例有限制性表达(12%).统计检验两种方法检测的结果显示表达有显著性差异(χ2=8.9338,P＜0.05)两种方法差异有显著性.结论:在诊断与鉴别诊断B细胞性淋巴瘤和反应性增生病变中,用ISH法检测轻链κ、λmRNA的基因序列,比用IHC法检测免疫球蛋白轻链蛋白κ、λ限制性更灵敏和精确.     

示波极谱法测定地面水中微量氰化物方法探讨

测定地面水中氰化物目前常用比色法。在实际工作中发现比色法灵敏度不高，故采用示波极谱法，实验结果表明，该方法操作简便，灵敏度高，检测线低，重线性好，现介绍如下。     

高效液相色谱系统适用性试验设计的变化趋势

高效液相色谱法(HPLC法)是药物分析中常用的一种定性、定量色谱分析方法。具有较强的专属性,相对较高的检测灵敏度和良好的量化功能。2005版《中国药典》使用HPLC法的品种中,色谱系统适用性试验设计有了较大的变化:指标更加细致、周到,检测更重实效,色谱系统适用性的试验用溶液的制备方法也呈现多样化,体现出一些变化趋势。1.色谱系统适用性试验的设计与实验目的更加匹配系统适用性试验的严格细腻程度取决于实验目的。首先应考虑色谱系统被用于何种实验,根据实验目的来设计系统适用性试验。如果一个HPLC方法仅用于定性鉴别,就其色谱系…     

Comparison of higher-order aberrations and contrast sensitivity between Tecnis Z9001 and CeeOn 911A intraocular lenses: a prospective randomized study

Background The advent of wavefront technology in the past five years has provided some insight into the optical outcomes of cataract surgery. The Tecnis Z9001 intraocular lens （Tecnis IOL, AMO） with a modified prolate anterior surface was claimed to reduce or even eliminate ocular spherical aberration to improve the visual quality. The purpose of this study was to determine whether Tecnis IOLs can improve the quality of vision as evaluated by measuring visual acuity, wavefront aberration, and contrast sensitivity. Methods In an intraindividual prospective study, 20 patients with bilateral cataract were randomly assigned to receive a modified prolate anterior surface IOL （Tecnis Z9001, AMO） in one eye and a biconvex spherical surface IOL （CeeOn 911A, AMO） in the other. After 3 months, the following were investigated： best corrected visual acuity, pupil diameter, photopic and mesopic contrast sensitivity, and wavefront aberration of the whole eye （ocular）, cornea, and internal plane. Results The differences in the best corrected visual acuity and pupil diameter between the two groups were not statistically significant. Negative 4th-order spherical aberration （Z4^0） was found in the Tecnis group, whereas positive Z4^0 found in the CeeOn group for the internal and ocular plane. Statistically significant differences were found at the ocular higher-aberrations between the two IOLs. Contrast sensitivity testing showed significantly better results in the Tecnis group at visual angles higher than 1.0 degree under photopic conditions and at visual angles higher than 1.6 degree under mesopic conditions both without glare and with glare in comparison with the CeeOn group. Conclusions The Tecnis Z9001 IOL with a modified prolate anterior surface produces negative spherical aberration and consequently reduces the higher-order aberrations in pseudophakic eyes. This leads to enhanced contrast sensitivity and improved functional vision compared to conventional spherical IOLs.     

Effects of Mitofusin-2 Gene on Cell Proliferation and Chemotherapy Sensitivity of MCF-7

In order to evaluate the effect of mitofusin-2 gene （mfn2） on proliferation and chemotherapy sensitivity of human breast carcinoma cell line MCF-7 in vitro, pEGFPmfn2 plasmid carrying full length of mitofusin-2 gene was transfected, by using sofast, into MCF-7 cells. Mitofusin-2 gene expression in MCF-7 cells transfected by sofast after 48 h was detected by PCR and Western blotting, and the stable expression of GFP protein in MCF-7 cells by Western blot analysis. The proliferation of MCF-7 cells was assayed by MTT and cell counting. By using PI method, the effects of mfn2 on the cell cycle distribution of MCF-7 were measured. Annexin-Ⅴ/PI double labeling method was employed to detect the changes in apoptosis induced by chemotherapeutics before and after transfection. The results showed that the MCF-7 cells transfected with mfn2 gene could stably and highly express GFP protein. MTT assay revealed that after transfection of mfn2 cDNA, the proliferation of MCF-7 cells was significantly inhibited. DNA histogram showed that cells arrested in S phase, and the percentage of S phase cells was 42.7, 17.2 and 19.6 in mfn2 cDNA transfection group, blank plasmid transfection group and blank control group, respectively （P〈0.05）. The apoptosis ratio of the cells transfected with mfn2 gene was increased from 3.56% to 15.95%, that of the cells treated with camptothecin （CAMP） followed by mfn2 gene transfection was 69.6%, and that in blank plasmid transfection group and blank control group was 31.0% and 23.4% respectively （P〈0.05）. It was suggested that transfection of mfn2 gene could significantly inhibit the proliferation of MCF-7 cells and promote their sensitivity to CAMP with a synergic effect.     

ELISA检测抗HCV影响因素分析

ELISA检测抗HCV目前已是血站、医院的常规检测项目，虽然该方法操作简单，灵敏度高，但在实际操作中，ELISA检测抗HCV结果假阴性、假阳性问题还是比较常见，该临床诊断给治疗带来很大闲难。影响ELISA检测抗HCV因素众多。现就比较常见的影响因素加以分析总结。