Circulating immune complexes in tuberculosis

To examine whether any correlation exists between the levels of circulating immune complexes (CICs) and the activity of tuberculosis, CICs were measured in the sera of 75 patients with active tuberculosis and in 25 control subjects using polyethylene glycol method. The effect of drug treatment on the levels of CICs was also estimated in 25 patients. It was found that levels of CICs were elevated in most of the untreated patients (96%) of tuberculosis and the CICs levels fell to control values in 64% of patients at the end of treatment.     

HCV感染者体内Ig/C3-CIC的检测及意义

目的探讨HCV感染者体内Ig特异性激活补体类循环免疫复合物(Ig/C3-CIC)的病理生理意义。方法采用捕捉法ELISA,检测80例HCV感染者血清中的IgG、IgM和IgA特异性激活补体类循环免疫复合物(即IgG/C3-CIC、IgM/C3-CIC和IgA/C3-CIC),并分析三类Ig/C3-CIC与患者的性别、年龄、病程及谷丙转氨酶(ALT)的关系。结果HCV感染者体内IgG/C3-CIC、IgM/C3-CIC和IgA/C3-CIC的阳性率分别为65.0%、61.3%和45.0%。其中,IgM/C3-CIC和IgG/C3-CIC在ALT升高组显著高于ALT正常组,IgA/C3-CIC与ALT的升高与否无关;IgG/C3-CIC和IgA/C3-CIC的阳性率随病程的迁延而显著升高,IgM/C3-CIC与病程无明显关联;三类Ig/C3-CIC与性别和年龄均无关。结论HCV感染者体内Ig/C3-CIC可能是直接参与肝脏损害及慢性化的因素,不同Ig类型的Ig/C3-CIC具有不同的病理意义。     

人循环T细胞免疫指数模型评估结直肠癌患者手术预后的价值

目的探讨人循环T细胞免疫指数（CTII）模型评估结直肠癌患者手术预后的价值。方法根据行手术切除且经病理证实为结直肠癌的138例患者的循环血T细胞信息绘制ROC曲线,评价CTII模型对结直肠癌术后的预测能力,并确定最佳截点值进行分组。根据Kaplan-Meier曲线分析无病生存时间（RFS）和总生存时间（OS）。采用Cox比例风险回归模型分析影响预后的因素。结果对138例结直肠癌患者随访5年,失访10例。根据ROC曲线,确定以RFS为研究基础,获得CTII最佳截点值为0.08。按该值分为低CTII组（＜0.08）62例和高CTII组（≥0.08）76例。不同CTII组患者的TNM分期、分化程度以及循环CD4+调节性T细胞、CD8+调节性T细胞、CD28+细胞毒性T细胞比较,差异均有统计学意义（均P＜0.05）。高CTII组患者RFS、OS均明显低于低CTII组（均P＜0.01）。Cox比例风险回归模型分析结果显示,TNM分期（HR=2.274,95%CI：1.455~3.555;HR=0.197,95%CI：0.155~2.463）、分化程度（HR=2.982,95%CI：1.082~5.429;HR=1.867,95%CI：0.930~3.774）、CTII（HR=1.738,95%CI：1.012~2.894;HR=1.987,95%CI：1.188~3.182）是影响结直肠癌患者术后RFS和OS的独立危险因素（均P＜0.05）。结论CTII模型对结直肠癌患者手术预后的评估具有指导价值,是一项易检测、重复性好、价格低廉的肿瘤相关性炎症指标;其中高CTII提示预后不良。     

免疫复合物对单核巨噬细胞的调节作用

目的  研究免疫复合物对单核巨噬细胞的增殖、细胞因子的分泌及吞噬功能的调节作用。方法  免疫复合物组：细胞坏死上清+系统性红斑狼疮（SLE）患者血清;对照组有5组：坏死上清+正常人血清组、坏死上清组、SLE血清组、正常人血清组和培养基组,以上分别作用于U937细胞和U937细胞诱导产生的巨噬细胞。24h后,用CCK 8法检测U937细胞的增殖,RT-PCR法检测U937细胞分泌肿瘤坏死因子α（TNF-α）和B细胞活化因子（BAFF）的变化,中性红比色法检测诱导产生的巨噬细胞的吞噬功能。结果  与对照组相比,免疫复合物能明显促进U937细胞的增殖 （Ｐ＜0.05）,TNF-α 和BAFF 的mRNA表达水平明显增加（Ｐ＜0.05）,并明显抑制巨噬细胞的吞噬功能（Ｐ＜0.05）。结论  在免疫复合物作用下,单核巨噬细胞系统（MPS）处于异常活化状态,使免疫复合物的形成增多而清除减少,从而参与了SLE的发生发展。     

Borrelia burgdorferi-specific immune complexes in acute Lyme disease

CONTEXT: Diagnosis of infection with Borrelia burgdorferi, the cause of Lyme disease (LD), has been impeded by the lack of effective assays to detect active infection. OBJECTIVE: To determine whether B. burgdorferi-specific immune complexes are detectable during active infection in LD. DESIGN, SETTING, AND PATIENTS: Cross-sectional analysis of serum samples from 168 patients fulfilling Centers for Disease Control and Prevention surveillance criteria for LD and 145 healthy and other disease controls conducted over 8 years. Tests were performed blinded. MAIN OUTCOME MEASURE: Detection of B. burgdorferi immune complexes by enzyme-linked immunosorbent assay and Western blot. RESULTS: The B. burgdorferi immune complexes were found in 25 of 26 patients with early seronegative erythema migrans (EM) LD; 105 of 107 patients with seropositive EM LD; 6 of 10 samples that were seronegative [corrected] with culture-positive EM; 0 of 12 patients who were treated and recovered from LD; and 13 of 13 patients with neurologic LD without EM. Among 147 controls, B. burgdorferi immune complex was found in 0 of 50 healthy individuals; 0 of 40 patients with persistent fatigue; 0 of 7 individuals with frequent tick exposure; and 2 of 50 patients with other diseases. CONCLUSION: These data suggest that B. burgdorferi immune complex formation is a common process in active LD. Analysis of the B. burgdorferi immune complexes by a simple technique has the potential to support or exclude a diagnosis of early as well as active LD infection.     

重症肌无力患者循环免疫复合物的初步研究

The levels of circulating immune complex from 43 patients with myasthenia gravis (MG) and 50 normal controls were detected by using ELISA based on bovine conglutinin. The levels of circulating immune complex in MG patients were higher than those in normal controls (P less than 0.01). Although the levels of circulating immune complex in generalized type MG were higher than those in ocular type MG, the difference showed no statistically significant. It was found that the levels of circulating immune complex, both generalized type MG and ocular type MG, were higher than those in normal controls respectively (P less than 0.01).     

Beh?et's syndrome: unusual multisystem involvement and immune complexes.

A case of-Behçet''s syndrome is described in which, in addition to the usual features of the condition, there was evidence of renal, gastric and cardiac involvement. Neurological involvement presented as hemisphere, transient ischaemic episodes. Immune complexes were detected and the patient responded promptly to prednisolone.     

2型糖尿病患者血清低密度脂蛋白免疫复合物的检测及临床意义

采用ELISA法测定102例2型糖尿病（T2DM）患者（其中54例合并大血管病变）、45例大血管病变患者及30例正常对照者的血清低密度脂蛋白免疫复合物（LDL-ICs）浓度。T2DM及大血管病变患者血LDL—ICs浓度均高于正常对照者,糖尿病合并大血管病变者高于单纯糖尿病、单纯大血管病变患者;血清LDL-ICs浓度与体重指数、血糖化血红蛋白、血压、总胆固醇、甘油三酯水平呈正相关,与高密度脂蛋白胆固醇水平呈负相关,与低密度脂蛋白胆固醇水平无相关性。LDL-ICs、血压、糖化血红蛋白是糖尿病大血管病变的危险因素。     

日本血吸虫循环免疫复合物中抗原的鉴定

用低浓度ＰＥＧ（ＭＷ６０００）提取的日本血吸虫感染兔血清中循环免疫复合物（ＣＩＣ）直接免疫家兔，制备ＣＩＣ兔血清。采用酶联免疫印迹技术（ＥＩＴＢ）分析鉴定日本血吸虫ＣＩＣ中抗原成份。结果表明，ＣＩＣ中成虫及其排泄分泌物源性抗原成份有１７种，虫卵源性抗原成份有５种。且ＩＦＡＴ方法分析ＣＩＣ中抗原成份定位于成虫表膜及肠腔上皮。     

原发性肝癌患者红细胞免疫分子CR1活性和循环免疫复合物的变化

原发性肝癌患者机体免疫状态处于失衡状态,表现为细胞免疫功能低下而体液免疫功能紊乱与亢进,IgG等免疫球蛋白和循环免疫复合物异常升高.患者特异性免疫反应处于异常状态是与天然免疫功能异常密切相关的[1].现认为天然免疫是特异性免疫反应的指导,特异性免疫功能失衡是与天然免疫功能低下密切相关的,天然免疫的物质基础是胚系基因编码的各种蛋白质,其广泛存在于血浆和血细胞上,如血浆中的补体系统和血细胞上的CR1等[2].红细胞数量巨大,在天然免疫反应中占有重要地位.我们同时测定红细胞CR1分子与循环免疫复合物含量的变化,发现原发性肝癌患者红细胞CR1分子量减少,而循环免疫复合物含量明显上升,现报告如下.     

人oxLDL自身免疫复合物的体外致动脉粥样硬化作用

目的：观察oxLDL自身免疫复合物对U937巨噬样细胞泡沫化和活化的影响,以探讨oxLDL免疫学反应致动脉粥样硬化的机制。方法：采用密度离心法从健康人血浆中提取低密度脂蛋白（LDL）,用铜离子氧化成oxLDL;用亲和层析法从136例住院患者血清中提取oxLDL自身抗体。在体外制成2种形式不同的免疫复合物：聚乙二醇沉淀的不溶性免疫复合物（PEG-IC）和RBC吸附的可溶性免疫复合物（RBC-IC）,把这2种免疫复合物加至U937巨噬样细胞的培养基中,以oxLDL作阳性对照,并用热聚合人γ球蛋白（HAGG）封闭Fcγ受体作阻断对照,检测干预后的各组U937巨噬样细胞内胆固醇和胆固醇酯及培养基中基质金属蛋白酶-1（MMP-1）的水平。结果：RBC-IC干预组与RBC吸附oxLDL（RBC-oxLDL）干预组比较,U937巨噬样细胞培养基中MMP-1蛋白表达［（0.769±0.030) ng/ml vs (0.513±0.034) ng/ml,P＜0.01］和细胞内胆固醇酯蓄积［（20.271±1.668) μg/mg vs (17.226±1.298) μg/mg,P＜0.05］明显升高;而在PEG-IC组这种作用则更为明显,且呈剂量依赖性。用10mg/ml的HAGG封闭Fcγ受体后,MMP-1的水平下降约71%,其对巨噬样细胞泡沫化和活化的作用都受到明显的抑制。结论：oxLDL自身免疫复合物能够促进巨噬细胞泡沫化和活化, 其参与动脉粥样硬化的过程可能是通过Fcγ受体途径来实现的。