ELISA法检测可溶性人类白细胞抗原—I及广东人参考值的测定

OBJECTIVE: To explore a method for quantitative detection of soluble human leukocyte antigen class I(HLA-I) antigens, with the assistance of which we attempt to define the reference value of the antigen in the population of Guangdong Province. METHODS: Sandwich enzyme-linked immunosorbent assay (ELISA) was employed with W6/32 monoclonal antibody serving as the solid phase antibody and beta2 microglobulin antibody as the first antibody. HRP-labeled second antibody and the substrate were added for enzyme-catalyzed coloring. On the basis of the standard curve obtained by sHLA-I standard reagent in serial dilution, the concentration of sHLA-I antigens in the samples of 60 normal subjects from the population of Guangdong province was detected. RESULTS: The sensitivity of this assay was 2.84 ng/ml with variation coefficients of 5.80% within the same batch and 9.00% between batches. The recovery rate ranged from 98.57% to 100.15%. The level of sHLA-I antigens in normal individuals was 699.54+/-360.10 ng/ml. CONCLUSION: Sandwich ELISA is sensitive, specific and stable in the detection of sHLA-I.     

老年脑梗死患者急性期血小板活化功能定量检测

目的 :探讨老年脑梗死患者外周血中血小板膜糖蛋白变化的临床意义。　方法 :应用流式细胞术检测了 6 8例急性期老年脑梗死患者外周血血小板活化分子标记物CD4 1、CD6 2p和CD6 3的含量水平 ,与 4 2例正常老年人对照 ;并对脑梗死组病灶大小、梗死部位、病情分级等与血小板活化分子表达的变化进行分析 ,应用统计学进行处理。　结果 :急性期脑梗死患者血小板粘附分子CD4 1、CD6 2 p和CD6 3的表达水平显著高于正常对照组 (P <0 .0 1) ,且与梗死灶大小及病情分级密切相关 ,与梗死部位无关。　结论 :老年脑梗死患者急性期外周血血小板活化功能明显增强 ,为早期应用抗血小板聚集药物的治疗提供了实验依据     

Differentiation of Helicobacter pylori isolates by polymerase chain reaction—restriction fragment length polymorphism

Objective: To investigate the association between the diversity of urease gene and urease activity of clinical isolates of Helicobacter pylori (H. pylori). Methods: Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) of urease gene and rapid urease activity test were used to study the urease activity of different clinical isolates of H. pylori. Results: H. pylori clinical isolates were divided into 4 types according to their PCR-RFLP results of urease gene and urease activity. Type Ⅰ , possessing strong urease activity (0. 11) and presented 1 fragment of 1. 7 kb by PCR-RFLP, had close relations with gastric ulcer; type Ⅱ , with the weakest urease activity (0. 07) and 2 fragments (1. 3 and 0. 4 kb respectively) , was associated with duodenal bulb ulcer; type Ⅲ , with the strongest urease activity (0. 12) and 2 fragments (0. 4 and 0. 17 kb) with or without 1 fragment (0. 23 or 0. 37 kb) , was responsible for gastritis; type Ⅳ , with weak urease activity (0. 09) and 2 fragments     

高表达醛糖还原酶相似基因细胞株的建立和鉴定

目的 建立高表达醛糖还原酶相似基因的细胞株。方法 通过阳离子脂质体转染法将醛糖还原酶相似基因导入HepG2细胞，建立稳定表达该基因的细胞株，采用PCR，RT-PCR等方法鉴定醛糖还原酶相似基因在HepG2中的表达情况。结果 成功建立了高表达醛糖还原酶相似的转染细胞株。     

慢性乙型肝炎45例HBV基本核心启动子变异及HBV-DNA定量检测

采用聚合酶链反应－酶联免疫吸附法检测45例慢性乙型肝炎乙肝病毒基本核心启动子（HBV－Bcp）变异及HBV－DNA定量，结果HBV－Bcp变异阴性组HBV－DNA定量值明显低于HBV－Bcp变异阳性组（P＜0．05），提示HBV－Bcp变异可促进乙肝病毒繁殖，对慢性乙型肝炎患者检测HBV－Bcp变异有一定的临床意义。     

盐酸左旋咪唑中有关物质的探讨

盐酸左旋咪唑是一种驱虫药,该产品在酸、碱、高温等条件下易产生副产物而影响质量,而中国药典、英国药典、美国药典对副产物的检测均采用薄板层析法,该方法只能定性及检测含量较大的杂质,而对微量组分则难以测定.笔者采用高效液相色谱法对盐酸左旋咪唑原料中有关物质的残留量及产生的副产物进行定量测定,取得了较为满意的效果.     

中风危险度的定量评估研究

目的：通过对上海市南汇区近70万人群2年的中风监测和预防研究，验证应用脑血管血液动力学检测指标和积分方法来定量评估中风危险度的客观性、可行性和准确性。方法：先通过询问病史及测量血压，从社区人群中筛选出具有高血压病、心脏病、糖尿病、高血压家族史、中风家族集聚现象等病史的中风易患个体；再对其进行脑血管血液动力学检测，定量评估中风危险度，筛选出中风高危个体，给予个体化的综合性治疗，并定期随访。结果：从南汇区696558人的框架人群中共筛选出中风易患个体51936例（有完整资料记载），其中有新发中风患522例（经头颅CT／MRI确诊），该中风组与相同年龄正常组的各项脑血管血液动力学参数间均存在显差异，且随着脑血管血液动力学检测积分值的降低，中风发病率逐渐上升，发病间隔也逐渐缩短；有既往中风史585例，其患侧和健侧的各项脑血管血液动力学参数间亦存在显差异。结论：运用脑血管血液动力学检测，依据积分值的高低，能够科学、客观、较准确地定量评估出中风的危险度。     

性传播疾病实验检测综述

性传播疾病(性病,STD)是指主要由性接触而传播的一组传染病,性行为是其主要传播途径,除此之外还有血液和血制品传播、医源性传播、职业性传播以及胎盘产道和母乳传播等传播方式[1]。广泛开展性病的早期筛查、早期诊断以及早期治疗极为重要。本文就性病常见的几种主要实验检测方     

本刊对论文中统计学处理的要求

统计学分析方法的选择：对于定量资料，应根据所采用的设计类型、资料具备的条件和分析目的，选用合适的统计学分析方法，不应盲目套用t检验和单因素方差分析；对于定性资料，应根据所采用的设计类型、定性变量的性质和频数所具备的条件及分析目的，选用合适的统计学分析方法，不应盲目套用Х^2检验。