ABO antibody titres: a multisite comparative study of equivalency and reproducibility for automated solid-phase and haemagglutination titration,and manual dilution with gel column agglutination technology

BackgroundABO antibody titres are important in many clinical decisions; however, much variability is observed in titre results. For reliable and reproducible titre results, automated ABO titration methods have been developed. In this 10-site study, we evaluated the equivalency of the automated ABO titration assays on the Galileo NEO, a fully automated blood bank analyzer (Immucor, Inc.) to manual titration with gel Column Agglutination Technology (CAT), as well as the reproducibility of both methods.Materials and methodsTen different locations participated in this study. The equivalency study included 70 random samples at each site. The reproducibility study tested the same blinded 30-sample panel at each study site. Anti-A and anti-B IgM and IgG antibody titres were tested with both the automated and manual methods; additionally, dithiothreitol (DTT) treatment was used to inactivate IgM antibodies in the manual CAT method.ResultsThe equivalency between CAT manual method and Galileo NEO automated titres at each site ranged from 38 to 88%; equivalency for each isotype was 66.2% for IgM, 60.6% for IgG, and 88.5% for DTT-treated IgG. The reproducibility study evaluated the titre variation of each sample obtained from the 10 sites. The average titre ranges (in doubling dilutions) for the automated and manual methods, respectively, were 2.15±1.0 and 4.03±1.8 for IgM, and 1.53±0.7 and 4.10±1.9 for IgG; for the manual DTT-treated IgG, the average titre range was 3.45±1.8 doubling dilutions.DiscussionThe results demonstrated that the Galileo NEO automated and manual CAT ABO titres are not equivalent. However, the study also demonstrated that titre reproducibility is enhanced with the Galileo NEO automated ABO titration assays relative to the manual CAT ABO titration method. Therefore, to improve management of patients receiving care across multiple institutions, our study supports the use of automated ABO titration.     

安肠胶囊对慢性溃疡性结肠炎患者黏膜局部免疫细胞的影响

目的　探讨安肠胶囊对慢性溃疡性结肠炎 (ulcerativecolitis,UC)黏膜局部免疫细胞的影响。方法　应用兔抗人IgA、兔抗人IgG、兔抗人IgM多克隆抗体及鼠抗人肥大细胞类胰蛋白酶单克隆抗体 ,通过免疫组化技术 ,对 13例UC患者结直肠黏膜标本及 10例正常黏膜进行Ig细胞和肥大细胞密度检测。结果　UC患者黏膜固有层的IgA细胞数量低于正常黏膜 ,IgG细胞和肥大细胞密度均高于正常黏膜 ,经安肠胶囊治疗后 ,IgA细胞的数量较治疗前有所增加(P <0 .0 0 1) ,IgG和肥大细胞下降 (P <0 .0 5 ) ;治疗后IgA细胞、IgG细胞和肥大细胞与正常黏膜相比无显著性差异 (P >0 .0 5 ) ;治疗前后的IgM细胞数量和正常黏膜相比无显著性差异。结论　结直肠黏膜局部体液免疫细胞 (浆细胞 )亚群的活化与溃疡性结肠炎的活动密切相关 ,安肠胶囊通过对局部IgA ,IgG细胞和肥大细胞数量的调节而达到治疗目的     

Temporal effect of Guanxin No. 2 on cardiac function, blood viscosity and angiogenesis in rats after long-term occlusion of the left anterior descending coronary artery

AIM: Cardiac infarction is one of the main causes of death in both developing and developed countries over past decades. Currently available approaches for treating patients with this disease are not satisfactory. Traditional Chinese medicines have been increasingly paid attention to. The aim of this study was to characterize the dynamic protective effects of Guanxin No. 2 decoction (GX II) on cardiac dysfunction combined with the blood viscosity and myocardial hypertrophy parameters in myocardial infarction (MI) rats. METHODS: Male Sprague-Dawley rats (180-200 g) were randomly divided into three groups: sham-operated, coronary artery ligation (CAL), and CAL plus GX II (GX II, 10.0 g raw materials/kg/d, bid, p.o.). The experiment was carried out at 4 time points as the 3rd, 7th, 14th, and 28th day after ligation. RESULT: It was found that on the one hand, GX II could significantly improve the heart function, and remarkably decrease infarct size and inhibit ventricular remodeling. On the other hand, GX II showed some unique effects such as angiogenesis which was induced in the left ventricular tissue. This result was consistent with the finding of an augmented vascular endothelial growth factor (VEGF) expression in this area. CONCLUSIONS: The studies demonstrated that GX II exerted extensively beneficial cardioprotective effect on CAL rats, it might stimulate angiogenesis of ischemic region to compensate blood supply to the heart via upregulated VEGF expression.     

甲亢患者IgG特异性激活补体类循环免疫复合物的研究

目的探讨甲状腺机能亢进(Graves disease,GD)患者IgG特异性激活补体类循环免疫复合物(IgG/C3-TCIC)的存在状况及其病理生理意义.方法采用捕捉法ELISA以羊IgG抗人C3为包被抗体,HRP-羊抗人IgG为检测抗体,检测了219例GD患者和105例健康人血清中IgG/C3-TCIC;按不同年龄、性别、血清Ig、C3、T3、T4、FT3、FT4、TG和TM水平正常与否,比较其阳性率;并分析其与血清总、游离、复合Ig与C、的相关性.结果GD患者血清中IgG/C3-TCIC含量和阳性率显著高于正常对照组(P＜0.01,0.001);其阳性率与年龄、性别及血清甲状腺激素水平无关,仪在血清IgA水平升高组显著高于IgA正常组(P＜0.05);患者IgG/C、-TCIC仅与复合IgM呈正相关(r=0.173 2,P＜0.05),而正常对照IgG/C3-TCIC与总游离IgM及复合C、呈正相关(r=0.496 8,0.473 1,0.2113;P＜0.001,0.001,0.05).结论GD患者存在特异性免疫功能紊乱.Ig类型转换于该类TCIC的形成具有重要的调节作用.并提出深入研究其机理,将可能为探索Graves病发病机理和治疗找到一条新路.     

IgG4-Related Lung Disease Exhibiting the Invasion into the Diaphragm: A Case Report

Immunoglobulin G4-related disease (IgG4-RD) is a fibroinflammatory condition which involves various organs. This is a very rare case of IgG4-related lung disease (IgG4-RLD) with the invasion into diaphragm. The patient was a 71-year-old man with a long-term exposure to asbestos who had a mass shadow in the left lower lung lobe, which was suspected to invade the left diaphragm on computed tomography (CT). Positron emission tomography (PET)/CT also presented an avid intake of fluorodeoxyglucose in the mass, which suspected lung cancer. Although bronchoscopic biopsy could not lead to the definite diagnosis, we performed left lower lobectomy combined with the resection of left diaphragm. The specimen showed the features of IgG4-RLD on pathology: the vein stenosis and fibrosis around the vein, the infiltration of IgG4-positive cells, and IgG cells to IgG4 cells ratio of 40%. Furthermore, there were inflammatory cells infiltrating to the diaphragm.     

CpG-ODN2006、LPS及白介素对SLE、RA患者EBV永生化B淋巴细胞抗体产生的初步研究

目的:不依赖抗原情况下,分别用TLRs的激动剂及细胞因子单独和联合应用,对不同人群永生化B细胞体外刺激及诱导抗体产生,观察在疾病状态下B细胞活化状态,为寻找自身免疫病更敏感的新指标奠定基础。方法:用EpsteinBarr病毒(EBV)攻击SLE、RA患者B细胞,使之成为永生化的B淋巴母细胞系,体外用CpG-ODN2006、LPS及细胞因子与细胞共培养,免疫散射比浊法测定刺激后不同时段的总IgG水平,进行重复测量设计的方差分析。结果:刺激后细胞上清抗体分泌量增高10倍左右;SLE和RA患者抗体分泌量高于正常人;刺激后18d抗体分泌效应差异最为明显;CpG-ODN2006&IL-4&IL-6三者联合的刺激最好;经诱导后的抗体,均未检测到疾病特异性的血清学指标。结论:在疾病状态下,体外给予刺激后,B细胞活化状态更高,但未诱导出疾病特异的自身抗体。     

110例儿童奥密克戎变异株感染恢复期血清IgG抗体变化

目的探讨儿童严重急性呼吸综合征冠状病毒2（severe acute respiratory syndrome coronavirus 2，SARS-CoV-2）奥密克戎（Omicron）变异株感染后恢复期血清抗SARS-CoV-2受体结构域特异性IgG抗体（简称SARS-CoV-2 IgG抗体）水平，了解SARS-CoV-2疫苗（简称新冠疫苗）接种对奥密克戎感染的保护作用。方法回顾性收集2022年1月8日至2月7日天津市确诊奥密克戎变异株感染的新型冠状病毒肺炎（coronavirus disease 2019，COVID-19）患儿110例，根据患儿确诊前新冠疫苗接种情况分为4组，加强针接种组（3剂）2例，完全接种组（2剂）90例，不完全接种组（1剂）5例，未接种组13例。比较4组患儿的临床资料和SARS-CoV-2 IgG抗体水平。结果完全接种组确诊年龄大于未接种组（P<0.05），完全接种组的传播途径与未接种组比较差异有统计学意义（P<0.05）。4组患儿性别、临床分型、SARS-CoV-2核酸检测再阳性率比较差异无统计学意义（P>0.05）。97例患儿均接种灭活病毒疫苗，以国药集团中国生物北京生物制品研究所疫苗接种人数最多（85/97，88%）。确诊后1个月加强针接种组、完全接种组SARS-CoV-2 IgG抗体水平高于未接种组（P<0.05）；确诊后2个月，完全接种组SARS-CoV-2 IgG抗体水平高于未接种组（P<0.05）。完全接种组患儿确诊后2个月的SARS-CoV-2 IgG抗体水平低于确诊后1个月水平（P<0.05）。结论接种灭活新冠疫苗在奥密克戎流行期对儿童有保护作用，完全接种新冠疫苗的患儿发生奥密克戎感染后保护性抗体SARS-CoV-2 IgG抗体水平在确诊后2个月时有轻度下降。     

新型冠状病毒IgG和IgM抗体检测的诊断价值探索

目的:通过对血清中新型冠状病毒1gM和IgG抗体的定性检测,探索新型冠状病毒1gM/gG抗体检测试剂盒(胶体金法)的临床诊断价值.方法:本研究以2020年1月3日至2020年3月19日于十堰市西苑医院收治的新型冠状病毒肺炎感染确诊患者141例和141名健康体检者为研究对象,采用胶体金免疫层析技术对患者血清中的新型冠状病...     

IgG4-Related Disease: A Constellation of Abdominal Manifestations

IgG4-related disease is an autoimmune condition that results in inflammation and fibrosis throughout multiple organ systems. This disease is rare; however, it can mimic many more prevalent conditions clinically and thus should be included in their differential diagnoses. Although autoimmune pancreatitis is the most common abdominal manifestation, the disease can afflict the hepatobiliary, vascular and renal systems as well. We present a case of a 78-year-old male with symptoms of chronic fatigue and weight loss. Imaging was performed with the expectation of revealing a malignancy, although the features of IgG4-related disease involving multiple organs were detected instead. Serology confirmed the diagnosis. It is imperative to diagnose IgG4-related disease early as it has a different treatment and favorable prognosis compared to many malignancies.     

小鼠IgG抗体的制备——IgG—SPA菌体免疫法

本文介绍制备小鼠IgG抗体的一种简便方法,即IgG-SPA菌体免疫法。首先制备10％(w/v)Cowan I 株菌体稳定液,按一定比例与正常小鼠血清制备IgG-SPA菌体免疫原。然后以9—12亿/ml菌体免疫原静脉注射于年青健康家兔,数次免疫后,即得兔抗小鼠IgG抗体(RAM-IgG),其血清效价达1:32～1:64(双扩法);其抗体纯度高,与正常小鼠血清只出现一条沉淀线。经鉴定,其血清不含有鼠IgM抗体。本文又把该法与IgG常规乳化佐剂免疫法作了比较。