特异性异尖线幼虫感染IgE抗体阳性与高危妊娠的相关性分析

【目的】探讨异尖线幼虫感染IgE抗体阳性与高危妊娠的相关性。【方法】选择2017年1月至2019年12月在本院诊治的高危妊娠孕妇738例(观察组),另外选择同期在本院产检健康孕妇500例作为对照组。采集所有孕妇的静脉血,检测其血清特异性异尖线幼虫IgE抗体,并分析孕妇血清IgE抗体阳性的影响因素及与高危妊娘的相关性。【结果】观察组IgE抗体阳性率为24.8%(183/738),显著高于对照组的20.0%(100/500),其差异有统计学意义(P<0.05);IgE阳性组孕妇的平均年龄显著大于IgE阴性组,顺产比例、初产比例显著低于IgE阴性组,产后住院时间显著长于IgE阴性组,妊娠期间检查次数显著少于IgE阴性组。孕妇分娩的新生儿中,IgE阳性组孕妇所产的新生儿体质量、胎龄均显著小于IgE阴性组,新生儿监护病房(NICU)患儿比例显著高于IgE阴性组。高危妊娠是孕妇异尖线幼虫感染IgE抗体阳性的独立危险因素。【结论】高危妊娠是孕妇异尖线幼虫感染IgE抗体阳性的独立危险因素,影响妊娘结局。     

Effects of mental workload on long-latency auditory-evoked-potential,salivary cortisol,and immunoglobulin A

This paper researches on the effects of mental workload on long-latency auditory-evoked-potential (AEP), salivary cortisol, and immunoglobulin A (IgA). 20 Healthy subjects (11 males and 9 females) participated in the experiment voluntarily. The mental task consisted of two parts: arithmetic task and reading comprehension task. The Latencies of N1, P2, N2, P3, and mismatch negativity (MMN) all increased significantly after the mental tasks were adopted at all of the three recording sites: Cz, Fz, and Pz (p < 0.05). In this experiment, changes of salivary cortisol and s-IgA levels due to mental tasks were not significant. With the introduction of mental tasks, more processing resources are allocated to the primary task (mental task), and decreased processing resources available for the secondary task (auditory task), which is reflected on the increases in the latencies of probe-evoked AEP components.     

肥胖相关性肾病伴IgA肾病2例临床病理分析

目的：探讨肥胖相关性肾病（ORG）伴IgA肾病的组织形态学特征、诊断、鉴别诊断、治疗及预后。方法：回顾性分析2例ORG伴IgA肾病的临床病理资料,并结合文献进行复习。结果：2例均为成年人,男女各1例,中位年龄35.5岁;以尿检异常为主要症状,体型肥胖,BMI均超正常值。光镜示：肾小球显著肥大,系膜区及系膜旁区沉积物伴一定数量的肾小球硬化。免疫组化显示以IgA沉积为主的系膜区沉积。电镜显示系膜区少量沉积物伴足突融合及微绒毛变性。结论：ORG伴IgA肾病非常罕见,依赖病理形态学和免疫表型,结合患者有肥胖及BMI超标即可确诊。病理学上需与IgA沉积及肾小球硬化相关肾病加以鉴别。ORG伴IgA肾病治疗方法多种,其预后较难预测。     

IgG4相关特发性肥厚性硬脑膜炎：一例报告并文献复习

目的探讨IgG4相关特发性肥厚性硬脑膜炎的临床表现、影像学及组织病理学特点。方法回顾分析1例IgG4表达阳性的特发性肥厚性硬脑膜炎患者的临床表现、组织学特征,并复习相关文献。结果男性患者,55岁。以癫痫发作起病,主要表现为发作性左侧肢体抽搐。MRI增强扫描显示局部硬脑膜增厚,并呈线样或结节样强化。大体标本观察硬脑膜明显增厚,质地坚硬;光学显微镜下可见硬脑膜异常增厚,纤维结缔组织增生及大量炎性细胞浸润,以淋巴细胞和浆细胞为主,伴少量嗜酸性粒细胞。免疫组织化学染色大量淋巴细胞表达IgG,部分表达IgG4。糖皮质激素和免疫抑制药治疗有效。结论特发性肥厚性硬脑膜炎是一类病因不明的硬脑膜纤维性炎性病变,部分患者可能是IgG4相关硬化性疾病谱中的一员。     

自身免疫性肝病患者血清IgG4水平分析

探讨不同自身免疫性肝病患者血清免疫球蛋白G4（immunoglobulin G4,IgG4）水平差异,并分析不同血清IgG4水平的自身免疫性肝病患者临床特点的差异。方法收集自身免疫性肝病患者65例,其中自身免疫性肝炎（AIH）11例、原发性胆汁性肝硬化（primary biliary cirrhosis,PBC）47例及AIH与PBC重叠综合征7例。采用免疫散射比浊法检测三组患者血清IgG4水平,并分析三组之间血清IgG4水平的差异。根据血清IgG4水平的不同进行分组,分析不同血清IgG4水平的自身免疫性肝病患者临床特点的差异。对组间正态分布的计量资料的比较应用独立样本t检验,对非正态分布者采用Mann-Whitney U检验。计数资料的比较采用Fisher’s确切概率法。结果 AIH患者血清 IgG4水平为642.2 mg/L （97.7 mg/L~1687.0 mg/L）,高于 PBC 患者[153.9 mg/L（78.9 mg/L~400.3 mg/L）,P=0.076]及重叠综合征患者[229.9 mg/L（154.9 mg/L~417.9 mg/L）,P=0.388],无统计学差异。其中3例AIH患者血清IgG4水平异常升高（≥1350 mg/L）,与血清IgG4水平较低的8例AIH患者比,IgG4水平和IgG4/IgG比值较高,差异具有统计学意义（P〈0.05）;3例血清IgG4水平≥1350 mg/L的AIH患者均合并2型糖尿病,其中1例合并类风湿性关节炎,而其他8例AIH患者未合并其他自身免疫性或代谢性疾病;血清IgG4水平较高（IgG4水平≥200 mg/L）的14例PBC患者与IgG4水平较低的33例PBC患者比,血清总胆红素水平较高[（45.09±74.85）μmol/L 对（26.38±23.03）μmol/L,P=0.05]。结论与PBC及PBC与AIH 重叠综合征患者比,AIH患者血清IgG4水平较高。血清IgG4水平较高的AIH患者可能较易合并其他自身免疫性或代谢性疾病。     

Long-term safety of subcutaneous immunotherapy with TO-204 in Japanese patients with house dust mite-induced allergic rhinitis and allergic bronchial asthma: Multicenter,open label clinical trial

Background

To evaluate the long-term safety of subcutaneous immunotherapy with TO-204, a standardized house dust mite (HDM) allergen extracts, we conducted a multicenter, open label clinical trial.

Suppression of immunoglobulin production in human peripheral blood mononuclear cells by monocytes via secretion of heavy-chain ferritin

In vitro antigen stimulation of peripheral blood mononuclear cells (PBMCs) does not induce immunoglobulin (Ig) production. However, pretreatment of PBMCs with l-leucyl-l-leucine methyl ester (LLME) prior to in vitro stimulation removes the suppression of Ig production. In the present study, we attempted to identify the target cells of LLME and determine the mechanisms by which Ig production in PBMCs is suppressed. We found that CD14⁺ monocytes are involved in the suppression of Ig production in PBMCs. Furthermore, we confirmed that heavy-chain ferritin derived from CD14⁺ monocytes suppresses Ig production in PBMCs, possibly through iron sequestration.     

Association of Japanese cedar pollinosis and sensitization with HLA-DPB1 in the Japanese adolescent

Background

Allergic rhinitis (AR) is a heterogeneous disorder that significantly affects daily activity, work productivity, sleep, learning, and quality of life in all generations. Japanese cedar (JC) pollen is the most common allergen responsible for the development of AR in Japan. AR caused by JC pollen is considered to be a multifactorial inheritance disease that is caused by both environmental and genetic factors. The aim of this study was to investigate whether Human Leukocyte Antigen-DPB1 (HLA-DPB1) is associated with JC sensitization/pollinosis.

儿童过敏性紫癜急性期免疫功能探讨

目的:总结儿童过敏性紫癜(Henoch-Schonlein purpura,HSP)的细胞及体液免疫特征,分析其与紫癜性肾炎(Henoch-Sch(o)nlein purpura nephritis,HSPN)的关系,探讨细胞免疫及体液免疫功能在HSP发病机制中的作用及临床检测价值.方法:HSP急性期患儿190例,按有无肾脏损害分为紫癜性肾炎组(HSPN)和非肾炎组(NHSPN),流式细胞仪免疫荧光法检测T淋巴细胞亚群、自然杀伤细胞(Natural killer cells,NK cells)、B淋巴细胞变化,ELISA法检测血清IL4、IL-10、TNF-α的含量,速率散射比浊法检测外周血免疫球蛋白IgG、IgM、IgA、IgE、C3、C4水平.结果:190例HSP患儿中,合并肾脏损害33例,不合并肾脏损害157例.与对照组相比,急性期HSP组CD19细胞绝对值、IL-4、IL-10、TNF-α、IgG、IgA、IgE、补体C3显著升高(P均＜0.05),CD3、CD4、CD8、NK细胞绝对值显著降低(P均＜0.05);HSP患儿中,HSPN组的IL-10、IgA水平高于NHSPN组(P＜0.05),两组之间其余指标的差异无统计学意义(P均＞0.05).IgA水平升高组HSPN发生率(21.64％)高于IgA水平正常组(7.14％,x2=5.785,P＜0.05).IL-10水平与IgA呈正相关(r=0.425 9,P＜0.05),IL-4水平与IgE呈正相关(r=0.541 7,P＜0.05).结论:HSP急性期存在细胞及体液免疫功能的紊乱,均参与了HSP的发病机制,表现为细胞免疫功能低下,引起炎性介质分泌增多,导致多克隆B细胞活化及免疫球蛋白的分泌增加,介导了系统性微小血管炎,其中IgA介导的体液免疫紊乱在HSP的发病机制中起了主要作用;HSPN的IgA水平升高更为显著,可能是预测HSP发生肾脏损害的一个危险因素.     

Inhibition of Fas-mediated Apoptosis by Antigen: Implications for Lymphomagenesis

Apoptotic deletion of expanded B cell populations is essential in avoidance of autoimmune disease and immune regulation of some B cell malignancies. The role of CD4+ T cells in B cell apoptosis is evident from the high incidence of B cell tumors and autoimmunity in patients with T cell diseases such as the acquired immune deficiency syndrome (AIDS). We have previously demonstrated that in Epstein-Barr Virus (EBV) negative Burkitt's lymphoma (BL), a tumor derived from proliferating centroblasts of the germinal center, the malignant lymphocytes can be induced to express Fas (CD95) by ligation of CD40 at the B cell surface. Upon CD40 engagement, BL cells are sensitized to T-cell derived death signals provided by Fas ligand (FasL, CD95L). HBL-3 is a cell line derived from an AIDS-related BL in which the tumor IgM binds the human erythrocyte "i" antigen. To determine whether Fas-mediated apoptosis of BL cells is reduced in the context of antigen to which the tumor IgM binds, we stimulated HBL-3 cells with CD40 ligand (CD40L, CD154) in the presence and absence of human erythrocytes expressing the "i" antigen, and measured Fas-mediated apoptosis upon exposure to an agonistic anti-Fas antibody. We observed that HBL-3 cells were sensitized to Fas-mediated death by exposure to CD40L. When i+ RBCs were present, Fas-mediated apoptosis in HBL-3 cells was reduced by greater than 30%. In contrast, there was no reduction in Fas-mediated apoptosis in the presence of i &#109 (I+) RBCs. These findings demonstrate that Fas-mediated deletion of BL cells is inhibited upon surface IgM engagement by antigen for which the malignant clone has affinity.