胃粘膜氧自由基及谷胱甘肽测定的临床意义

目的：观察幽门螺杆菌（HP）阳性患者胃窦部粘膜氧自由基及谷胱甘肽（GSH）的变化。方法：对40例HP（＋）和34例HP（－）患者的胃粘膜，采用化学发光法及DTNB法分别测定OFR和GSH。结果：HP（＋）组OFR明显高于HP（－）组，有显著差异（P＜0．01），而GSH两组间无差异。结论：OFR增加是HP引起胃粘膜损害的重要因素。     

化学发光法检测甲状腺激素的价值评价

目的：讨论化学发光法检测甲状腺激素的价值。方法：2020年9月～2021年9月,选取60例健康体检者作为健康组;选取60例甲状腺功能亢进患者作为甲亢组;选取60例甲状腺功能低下患者作为甲减组。入选者均接受甲状腺激素检测。观察指标：三组甲状腺激素及抗体指标检测结果;化学发光免疫法检测精密度及准确度。结果：化学发光免疫法下,健康组、甲亢组及甲减组甲状腺激素及抗体指标检测结果精确度明显优于酶联免疫吸附技术,P<0.05。化学发光免疫法检测甲状腺激素及抗体有较高的准确度,且总精密度CV值为1.68%～6.55%,明显低于8%,证实化学发光免疫法检测精密度及准确度较高。结论：化学发光法检测甲状腺激素有较高的准确度及精密度,利于有效鉴别甲状腺功能正常、亢进及低下状态,为临床诊疗提供科学依据。     

化学发光法与胶体金法检测SARS-CoV-2抗体阳性率比较

目的　探讨化学发光法和胶体金法检测SARS-CoV-2抗体在2019冠状病毒病（coronavirus disease 2019, COVID-19）诊断中的应用价值。方法　收集51例COVID-19确诊患者和41例非COVID-19患者的血清,用化学发光法检测非COVID-19组血清中SARS-CoV-2抗体IgM、IgG及联合检测（IgM或IgG）的阳性率;用化学发光法和胶体金法检测COVID-19组血清中SARS-CoV-2抗体IgM、IgG及联合检测（IgM或IgG）的阳性率,比较2种方法的一致性。结果　COVID-19组平均发病时间为（16.9±5.4）d。其中22例IgM阳性,阳性率为43.1%;47例IgG阳性,阳性率为92.2%;49例联合检测（IgM或IgG）阳性,阳性率为96.1%。非COVID-19组中,1例IgM阳性,阳性率为2.4%;0例IgG阳性,阳性率为0;1例联合检测（IgM或IgG）阳性,阳性率为2.4%。在COVID-19组中,化学发光法与胶体金法检测SARS-CoV-2抗体联合检测（IgM或IgG）的阳性率分别为96.1%和68.6%,化学发光法优于胶体金法（P＜0.05）。结论　SARS-CoV-2抗体的检测对COVID-19诊断有重要的意义,且化学发光法检出率优于胶体金法。     

化学发光法和放射免疫法检测TPA的比较研究

目的分析和评价化学发光法(CLIA)与放射免疫法(IRMA)在组织多肽抗原(TPA)检测中的应用价值。方法采用化学发光免疫分析法(CLIA)和放射免疫分析法(IRMA)检测157例肺癌患者和65例健康体检对照组血清组织多肽抗原(TPA)水平。所测得的数据进行统计学比较,并采用受试者工作特征(ROC)曲线进行分析。结果化学发光法和放射免疫法的批内、批间精密度均较好,差异无统计学意义;2种方法检测TPA诊断肺癌的阳性率差异无统计学意义(P0.05);对TPA的检测结果总符合率为88.7%(P0.01),相关系数r为0.92。2种方法检测TPA对相关肿瘤诊断的ROC曲线下面积分别为0.675、0.728。结论 CLIA与IRMA对TPA的检测结果均有良好的一致性,均能较好地满足临床需求。     

底物因素对化学发光法检测促甲状腺激素的影响

目的 分析底物因素对化学发光法检测促甲状腺激素的影响。方法 收集25份患者血清,测试阶段的底物分别1h、30min和10rain前配置,并各自在加注后5rain、10min、30min、1h和2h检测,比较促甲状腺激素的结果。结果 以底物10min前配置,加注后10min检测为标准,所有1h和2h检测组,结果与之比较差异均有统计学意义（P〈0．05）。结论 在化学发光法检测促甲状腺激素的实验中,无论底物何时配置（≤1h）,都应在底物加注后规定时间内（≤30min）进行检测,否则将会影响结果的准确性。     

化学发光法的研究进展综述

化学发光分析法实际上是利用化学发光的原理,而建立起来的一种分析方法。化学发光分析法的特点较为明显,主要表现在化学发光不需要任何光源,同时在实践的过程中化学发光分析法与其他方法相比较其灵敏度也较高,此外线性范围宽和仪器简单也是化学发光分析法的特点之一。正式基于这些特点,化学发光分析法在环境化学、临床检验、药物分析等领域得到十分广泛的应用和研究。本文针对化学发光法的研究进展进行综述,希望本文的研究能够为相关领域提供一些指导和借鉴。     

蛋白芯片法和胶体金法检测幽门螺杆菌方法比较

目的比较蛋白芯片法和胶体金法测定幽门螺杆菌(helicobacter pylori,HP)的结果,为临床HP感染诊断提供快速有效的检测方法。方法选择2012年6月—2013年6月临床送检280例经内窥镜检查和病理镜检确诊感染HP患者、200例未感染HP健康者进行蛋白芯片法、胶体金法检测HP,对检测结果进行对比分析。计数资料采用x~2检验,P0.05为差异有统计学意义。结果胶体金法、蛋白芯片法检测感染HP患者阳性例数(阳性率)分别为198例(70.7%)、239例(85.4%),两种方法检测阳性率比较差异有统计学意义。(x~2=17.5,P0.05);胶体金法、蛋白芯片法检测未感染HP健康者阴性例数(阴性率)分别为160例(80%)、195例(97.5%),两种方法检测未感染HP健康者阴性率比较差异有统计学意义。(x~2=30.7,P0.05)。结论用蛋白芯片法技术测定患者体液中HP相关抗体具有灵敏度高、特异性强和成本低廉的特点,是一种较理想的HP的辅助诊断方法,值得推广的检测技术。     

乙型肝炎病毒（HBV）的ELISA检测及化学发光法检测的诊断价值

目的 本研究探讨化学发光法与酶联免疫吸附法在(HBV)中的诊断价值。方法 收集本院2020年6月—2023年4月收治的300例乙型病毒性肝炎病例的血标本为观察组,另随机选择同期住院的300例非乙型病毒性肝炎病例的血标本为对照组。两组均采用HBV的ELISA检测及化学发光法检测,对比两组检测结果。结果化学发光法对HBV的标准曲线相关系数R²=0.998,平均批内变异系数2.98%,批间变异系数4.20%,优于ELISA检测的平均批内变异系数6.27%及平均批间变异系数7.74%;化学发光法的最低检出浓度为2.5ng/mL,ELISA检测乙型肝炎病毒最低检出浓度为25ng/mL,化学发光法灵敏度优于ELISA检测法。ELISA检测阳性率明显低于化学发光法检测结果,阴性率高于化学发光法。结论 化学发光法有利于早期诊断乙型病毒性肝炎,较ELISA检测具有很高的灵敏度与特异度。     

POCT法与化学发光法检测肌钙蛋白I的比较研究

目的:对比分析即时检验(POCT)法与化学发光免疫分析方法对血清肌钙蛋白Ⅰ(cTnⅠ)的测定结果。方法:选取在医院就诊的152例胸痛的疑似急性心肌梗塞(AMI)患者,采集其空腹血清样本;采用POCT方法与Beckman DXI800、CL-2000i和Abbott Achitech I2000型3种化学发光免疫分析仪对152例患者血清样本进行cTnI的检测。选取Abbott AchitechⅠ2000型化学发光免疫分析仪为参比检测系统,根据其检测的cTnI结果,将所有受试者分为阴性组(cTnI≤0.028 ng/ml,83例)、低浓度组(cTnI>0.028 ng/ml、≤0.3 ng/ml,16例)、中浓度组(cTnⅠ>0.3 ng/ml、≤10.00 ng/ml,40例)和高浓度组(cTnⅠ>10.00 ng/ml,13例)。比较4组POCT方法与3种化学发光免疫分析仪检测结果的相关性,以及POCT方法与3种化学发光免疫分析仪检测cTnI的相关性和一致性。结果:POCT检测系统在阴性组和低浓度组与参比检测系统相关性较差(P>0.05),在中浓度组和高浓度组与参比检测系统相关性较好(r=0.753,r=0.861;P<0.05)。POCT检测系统与参比检测系统的cTnI结果相关性较好(r=0.862,P<0.05)。Beckman DXI800和CL-2000i型化学发光免疫分析仪与参比检测系统具有很强的相关性(r=0.985,r=0.977;P<0.05)。结论:POCT法检测中浓度和高浓度cTnI时与化学发光免疫分析仪法有良好的相关性,但检测阴性和低浓度cTnI时与化学发光免疫分析仪法相关性较差。     

饮用水中重金属毒性荧光素酶化学发光法检测

水质中重金属类物质的含量是评价水质污染的重要指标。重金属摄入过量会对人体造成健康危害^[1-3]。当前检测重金属污染的常用方法是原子吸收分光光度法,虽优点多,但样品前处理复杂、检测时间长、需要大型仪器且不能实现现场检测;针对环境及饮水质量检测样品数量大而且需要实时监测的特点, 探讨和研发更为简便、快速及适于现场检测方法势在必行。     

化学发光免疫分析法在检测儿童EB病毒感染中的应用

目的 探讨化学发光免疫分析法检测EB病毒抗体在儿童临床EB病毒(EBV)感染诊断中的价值.方法 对228例符合EB病毒感染诊断标准的患儿采用化学发光免疫分析法检测血浆样本中VCA-IgM、EA-IgG、EBNA-IgG、VCA-IgG含量.结果 血浆VCA-IgM、EA-IgG、EBNA-IgG、VCA-IgG的检出率分别为84.65％、20.61％、25.88％、76.75％,差异具有统计学意义(P＜0.05);各种抗体以不同组合方式出现VCA-IgM阳性分类中,以VCA-IgM+VCA-IgG组合模式最为多见,VCA-IgM阴性分类中,则以VCA-IgG+EBNA-IgG组合模式最为多见;不同年龄段儿童VCA-IgM的检出率差异有统计学意义(P＜0.05),初次感染的年龄段主要集中在0～3岁.结论 化学发光免疫分析法检测EB病毒抗体对儿童EB病毒感染的明确具有早期、全面、快速等优点,适合临床检测.     

鸡肉组织中二甲硝咪唑残留物测定

目的 研究染毒后鸡肉组织中二甲硝眯唑（DMz）的残留情况，可能存在的原型药物及其自由代谢产物、结合残留物。方法 利用生物酶解技术、化学技术对样品进行处理，得到游离态及结合态残留物组分，进一步采用高效液相色谱-电喷雾离子化-质谱（HPLC-ESI-MS）法检测其组成结构。结果 在染毒动物鸡体12h内肌肉组织样品中发现有原型药物DMZ（m／z 141），较多的游离羟基化代谢物2-羟基二甲硝咪唑（DMZO）（m／z 157）及少量的去甲基化游离代谢物2-甲基-5硝基咪唑（m／z 127）的存在，未发现明显的葡萄糖苷酸化及磺化代谢物存在。结论 DMZOH为DMZ的主要代谢物，未发现明显的结合态残留物存在。     

Characteristics of reactive oxygen metabolites in serum of early teenagers in Japan

Objectives

The relationship between the incidence of cardiovascular disease and the state of oxidative stress in blood has been studied to some extent. Several lines of evidence underscore the importance of primary prevention of cardiovascular disease beginning in childhood. However, little is known about the current state of oxidative stress in childhood. This study was carried out to determine the current state of the level of reactive oxygen metabolites (ROM) in serum of early teenagers.

Methods

This study enrolled 595 healthy junior high school students from the town of Nanbu located in northern Japan. Oxidative stress was evaluated by measuring the serum level of ROM, and antioxidant capacity was evaluated by measuring the serum level of biological antioxidant potential (BAP).

Results

Although the ROM level in female students [308.6 ± 63.1 Carratelli units (U.CARR)] was slightly higher than that in males (299.9 ± 55.2 U.CARR), the difference was not statistically significant. The BAP level in males was significantly higher than that in females. The levels of ROM and BAP detected in males in the first grade were higher than those in the other grades. In females, only first-graders’ BAP was higher than that in other grades.

Conclusions

The current study found that the ROM level in males was negatively correlated with grade. These results suggest the presence of factor(s) that increase oxidative stress in Japanese puberty.     

High levels of reactive oxygen metabolites in colon cancer tissue: Analysis by chemiluminescence probe

Reactive oxygen metabolites (ROM) have been postulated to contribute to the development of various carcinomas, including colon cancer. Indeed, the effects of ROM scavengers are being tested for chemoprevention of adenocarcinoma of the colon. However, there has been no evidence to indicate that high levels of ROM are indeed present in cancerous tissue. In this study, we used a chemiluminescence probe to estimate ROM levels in cancerous and neighboring noncancerous colonic tissues from seven patients with colon cancer. Cancerous tissues contained significantly (p < 0.05) more luminol‐enhanced chemiluminescence (4,808 ± 2,282 counts/min/mg protein) than neighboring noncancerous tissues (2,175 ± 1,111). The addition of an ROM scavenger, catalase (2, 4, and 8 μg/ml), to the tissue suspension inhibited chemiluminescence produced by both noncancerous (—74%, —85%, and —71%) and cancerous (—11%, —61%, and — 53 %) tissues. This study shows that colonic cancerous tissue contains high levels of ROM, which may play an important role in the pathogenesis of colon cancer.     

High levels of reactive oxygen metabolites in colon cancer tissue: analysis by chemiluminescence probe.

Reactive oxygen metabolites (ROM) have been postulated to contribute to the development of various carcinomas, including colon cancer. Indeed, the effects of ROM scavengers are being tested for chemoprevention of adenocarcinoma of the colon. However, there has been no evidence to indicate that high levels of ROM are indeed present in cancerous tissue. In this study, we used a chemiluminescence probe to estimate ROM levels in cancerous and neighboring noncancerous colonic tissues from seven patients with colon cancer. Cancerous tissues contained significantly (p less than 0.05) more luminol-enhanced chemiluminescence (4,808 +/- 2,282 counts/min/mg protein) than neighboring noncancerous tissues (2,175 +/- 1,111). The addition of an ROM scavenger, catalase (2, 4, and 8 micrograms/ml), to the tissue suspension inhibited chemiluminescence produced by both noncancerous (-74%, -85%, and -71%) and cancerous (-11%, -61%, and -53%) tissues. This study shows that colonic cancerous tissue contains high levels of ROM, which may play an important role in the pathogenesis of colon cancer.     

稀土元素铈对细胞内活性氧的影响

运用显微荧光术研究了Ce3+ 对肝细胞和V79细胞中活性氧 (ROS)的影响。结果表明 ,低浓度的Ce3 + 能显著降低细胞内ROS浓度 ,而高浓度的Ce3+ 能显著提高细胞内ROS的浓度。结果提示 ,低浓度的Ce3 + 可能减少脂质过氧化损伤或DNA氧化损伤 ,高浓度的Ce3 + 可能增加脂质过氧化损伤或DNA氧化损伤。     

Detection of antibodies in strongyloidiasis by enzyme-linked immunosorbent assay (ELISA)

Detection of IgG antibodies to Strongyloides stercoralis in sera of 29 patients with strongyloidiasis was attempted by the enzyme-linked immunosorbent assay (ELISA) using an extract of filariform larvae of S. stercoralis. The antibodies were found with a high degree of sensitivity in almost all patients. The ELISA values, however, did not correlate with the intensity of the infection or with differences in clinical and laboratory parameters. When the ELISA values of persons with Strongyloides were compared with those showing no S. stercoralis by faecal examinations, a significant difference was obtained between these two groups. The cross reactions with other helminth infections were significantly weaker than the reaction with Strongyloides infection. It was concluded that the antibodies are strongly elicited in human strongyloidiasis and that the assay provides a sensitive and specific method for diagnosis of strongyloidiasis.     

Fluorescence imaging of reactive oxygen metabolites generated in single macrophage cells (NR8383) upon phagocytosis of natural zeolite (erionite) fibers.

In this paper we address the phenomenon of reactive oxygen metabolite generation subsequent to phagocytosis of mineral fibers by macrophages. Natural erionite fibers were chosen because of their established toxicity. Macrophages (cell line NR8383) were loaded with the dye 5-(and 6)-carboxy-2',7'-dichlorodihydrofluorescein diacetate and exposed to erionite particles by centrifuging cells and fibers together to effect adherence. Reactive oxygen metabolite generation was examined by monitoring the fluorescence of oxidized dye formed via the reaction with oxygen species produced during phagocytosis. Individual cells were repeatedly scanned for up to 2 hr to monitor the evolution of this fluorescence. It was found that erionite-exposed cells had a mean total fluorescence of three times that of controls during the first 35 min, declining to two times that of controls at 35-60 min and about the same level as that of controls at 60-80 min. Ultrastructural studies of similarly treated aliquots of cells showed marked variation in size and numbers of the phagocytized particles. This study demonstrates that intracellular oxidation can be monitored on a single cell basis over a period of time. Quantitative studies are in progress to establish the relationship between the phagocytized particulate load and the extent of fluorescence.     

硒诱导HepG2细胞凋亡与活性氧的关系

目的探讨亚硒酸钠(Na2SeO3)诱导细胞凋亡的可能作用机制。方法用0、2.5、5、10和20μmol/L的Na2SeO3以及加有N-乙酰基-L-半胱氨酸(NAC)的Na2SeO3(10μmol/L)处理HepG2。用四甲基偶氮唑盐(MTT)比色法测定细胞活性;流式细胞仪测细胞内活性氧(ROS)的水平以及细胞凋亡情况。结果5、10和20μmol/LNa2SeO3作用于HepG21h即引起ROS增加,12h后HepG2细胞活性降低,24h后细胞早期凋亡以及晚期凋亡/坏死率均增加,与对照组相比差异有显著性(P<0.05);抗氧化剂NAC有效抑制了ROS的增加,并增加了细胞活性,降低了细胞凋亡率,与未加NAC的Na2SeO3组(10μmol/L)相比差异有显著性(P<0.05)。结论一定浓度的亚硒酸钠使HepG2细胞活性下降,促进了细胞凋亡,ROS的增加在其中发挥了作用。