肾病综合征患者血清IL-4和IL-10水平的变化及意义

目的通过观察肾病综合征(NS)免疫治疗前后白细胞介素-4(interleukin-4,IL-4)和IL-10水平的变化,探讨其临床意义。方法以ELISA检测52例NS患者在接受强的松和环磷酰胺治疗前及4周后血清IL-4和IL-10水平。结果NS患者血清IL-4水平显著增高(P<0.01),并与血清β_2微球蛋白呈显著正相关(n=52,r=0.352.P<0.05),血清IL-10水平与健康人无显著差异。治疗4周后血清IL-4和IL-10水平显著降低(P<0.05),尿蛋白排出量显著低于治疗前(P<0.05)。结论IL-4、IL-10参与了NS发病过程,强的松和环磷酰胺可通过调节IL-4和IL-10产生而调节NS的免疫紊乱,NS的免疫治疗方案可根据细胞因子水平(包括抗炎细胞因子IL-4和IL-10)调整。     

肾病综合征患者PBMC上清IL—4和IFN—γ及血清IgE水平

本文报道，对４２例原发性单纯型肾病综合征（ＩＮＳ）患者及相应年龄组健康儿童进行ＩＬ－４，ＩＦＮ－γ及血清ＩｇＥ水平均显著高于正常对照组，且两者呈正相关，而ＩＦＮ－γ水平显著低于正常对照组；缓解期患者ＩＬ－４、ＩＦＮ－γ及ＩｇＥ均接近于正常水平，提示ＩＬ－４及ＩＦＮ－γ为ＩｇＥ异常变化的两个重要细胞因子，对ＩｇＥ的合成，ＩＬ－４及ＩＦＮ－γ起着正负反馈的调节作用。     

肾病综合征患者PBMC上清IL－4和IFN－γ及血清IgE水平

本文报道，对４２例原发性单纯型肾病综合征（ＩＮＳ）患者及相应年龄组健康儿童进行ＩＬ－４、ＩＦＮ－γ及血清ＩｇＥ水平测定，结果表明，极期患者ＩＬ－４和ＩｇＥ水平均显著高于正常对照组，且两者呈正相关，而ＩＦＮ－γ水平显著低于正常对照组；缓解期患者ＩＬ－４、ＩＦＮ－γ及ＩｇＥ均接近于正常水平。提示ＩＬ－４及ＩＦＮ－γ为ＩｇＥ异常变化的两个重要细胞因子，对ＩｇＥ的合成，ＩＬ－４及ＩＦＮ－γ起着正负反馈的调节作用。     

过敏性哮喘患者血浆IL-4与IgE及嗜碱性细胞关系的研究

对30例过敏性哮喘患者和24例正常人分别检测了血浆IL-4、IgE、全血嗜碱性细胞值和以尘螨作为刺激剂的嗜碱性细胞释放介质能力,可观察到哮喘组IL-4平均值为35.2ng/L,虽高于正常组的20.33ng/L,但无显著差异,10％哮喘患者的IL-4值>150ng/L,而正常人全部低于此值。哮喘组血浆IgE平均值为486.80IU相似文献   

儿童肾病综合征T细胞增殖活性和白细胞介素2的检测

儿童肾病综合征Ｔ细胞增殖活性和白细胞介素２的检测楚海峰，莫秀芬（白求恩医科大学三院儿科长春１３００６２）郭立君，李凌波（卫生部长春生物制品研究所长春１３０Ｏ２１）卢宇（中国人民解放军２１１医院肾脏内科哈尔滨１５００８０）肾病综合征，特别是单纯性肾病的...     

IL-4RaArg55、IgE与API阳性婴幼儿喘息的相关性研究

目的 探讨白介素4受体基因Arg55(IL-4RaArg55)、IgE在哮喘预测指数(asthma predicting index,API)阳性患儿中的应用价值.方法 选取同期的年龄在1月至3岁喘息婴幼儿356例,分为API阳性组167例,API阴性组189例,同时设立对照组203例,首先应用PCR聚合酶链反应和DNA测序法对两组基因进行分型,并用ELISA法检测IgE水平,进一步根据年龄、性别进行组内分层,进行IgE水平统计分析.结果 ①IL-4RaArg55位点各基因型频率分布在API(+)组、API(-)组、对照组3组中差异无统计学意义(AA基因:x2 =2.16,P=0.35;x2=0.77,P=0.68;x2 =4.11,P=0.13;A等位基因:x2=0.48,P =0.49;x2=0.71,P=0.40;x2 =2.58,P=0.11).②API(+)、API(-)及对照组间IgE水平分别为93.18±40.79、54.16±22.66、48.82±21.42 U/mL,3组差异有统计学意义(H=377.419,P=0.000),API(+)组远高于API(-)及对照组.③API(+)组内＜2岁与≥2岁IgE水平相互比较,差异有统计学意义(t'=9.281,P＜0.001);API(-)组内＜2岁与≥2岁IgE水平相互比较,差异无统计学意义(t=0.693,P=0.489).④API(+)组及API(-)组内男性与女性IgE水平相互比较,差异无统计学意义[API(+) t=1.598,P=0.112,API(-)t=0.330,P=0.742].结论 ①IL-4RaArg55多态性与API结果无相关性;②血清IgE水平与API阳性有相关性,对≥2岁的婴幼儿喘息的预后判断有一定的意义.     

肾病综合征可溶性白细胞介素2受体改变的研究

采用ＥＬＩＳＡ法检测３２例ＮＳ患儿及２４例健康对照儿童血清和尿液ｓＩＬ－２Ｒ浓度并采用单克隆抗体间持免疫荧光法检测Ｔ细胞亚群，结果；（１）ＮＳ活动期组患儿血清及尿液ｓＩＬ－２Ｒ浓度明显高于ＮＳ缓解期组（Ｐ〈０．０１）和健康对照组（Ｐ〈０．０１），而ＮＳ缓解期组血清及尿液ｓＩＬ－２Ｒ浓度与健康对照组间无显著性差异（Ｐ〉０．０５）；（２）ＮＳ活动患儿尿液ｓＩＬ－２Ｒ与血清ｓＩＬ－２Ｒ浓度呈正相关（Ｒ＝     

儿童单纯性肾病综合征血浆对B细胞功能的影响

本文观察37例小儿单纯性肾病(INS)、6例急性链球菌感染后肾炎(APSGN)血浆及6例INS外周血单个核细胞(PBMC)培养上清液对SAC诱导的正常人B细胞增殖的影响,8例INS血浆对PWM诱导B细胞产生IgG及其亚类的影响。结果发现INS发作期血浆抑制B细胞增殖及PWM诱导的B细胞分化,对B细胞增殖的抑制效应不能被正常人混合血浆及小牛血清纠正,表明INS血浆抑制作用是由于确有抑制因子存在,而非缺乏某种物质。血浆抑制作用在INS缓解期消失,正常儿童及APSGN儿童血浆无此抑制作用。INS发作期血浆与其PBMC上清液对B细胞增殖的抑制作用呈直线正相关,提示其血浆抑制因子可能为INS患儿PBMC的产物。     

肾病综合征患者血清一氧化氮水平的变化

肾病综合征患者血清一氧化氮水平的变化...     

Postsplenectomy Type-1 Hypersensitivity Response: A Correlation Between IL-4 and IgE Serum Levels

Authors demonstrated the presence of allergic manifestations in splenectomized patients following traumatic rupture of this organ. In particular, allergic diathesis, as supported by serum IgE increase, was exclusively found in patients with preserved T helper (h)-2 lymphocyte function. Th-2 function was monitored by measuring serum levels of interleukin (IL)-4, a cytokine involved in IgE synthesis. On the opposite, in splenectomized individuals with a reduced Th-2 function as supported by lower IL-4 serum levels, no IgE increase and allergic manifestations were detectable. On these grounds, authors hypothesize that allergic manifestations may be correlated to splenectomy since its exeresis may favor the persistence of antigens in the blood. Consequentially, in patients with a preserved Th-2 function, antigenic overload may lead to IgE increase and allergy onset.     

Postsplenectomy type-1 hypersensitivity response: a correlation between IL-4 and IgE serum levels

Authors demonstrated the presence of allergic manifestations in splenectomized patients following traumatic rupture of this organ. In particular, allergic diathesis, as supported by serum IgE increase, was exclusively found in patients with preserved T helper (h)-2 lymphocyte function. Th-2 function was monitored by measuring serum levels of interleukin (IL)-4, a cytokine involved in IgE synthesis. On the opposite, in splenectomized individuals with a reduced Th-2 function as supported by lower IL-4 serum levels, no IgE increase and allergic manifestations were detectable. On these grounds, authors hypothesize that allergic manifestations may be correlated to splenectomy since its exeresis may favor the persistence of antigens in the blood. Consequentially, in patients with a preserved Th-2 function, antigenic overload may lead to IgE increase and allergy onset.     

Involvement of interleukin (IL)-13, but not IL-4, in spontaneous IgE and IgG4 production in nephrotic syndrome

Nephrotic syndrome (NS) is a renal disease characterized by proteinuria and hypoalbuminemia. In NS patients without any allergic disease, serum IgE and IgG4 levels were selectively increased, and peripheral blood mononuclear cells (MNC) spontaneously produced IgE and IgG4. T cells produced interleukin (IL)-13 spontaneously, and B cells constitutively expressed IL-13 receptors (IL-13R). In addition, T cells stimulated surface IgE-negative (sIgE^?) and sIgG4^? B cells to produce IgE and IgG4, respectively, and IgE and IgG4 production was specifically blocked by anti-IL-13 antibody (Ab). MNC from atopic dermatitis (AD) patients also produced IgE and IgG4 spontaneously. However, in AD patients, T cells spontaneously produced IL-4, but not IL-13, and B cells constitutively expressed IL-4R, but not IL-13R. T cells stimulated sIgE^? and sIgG4^? B cells to produce IgE and IgG4, respectively, and the production was specifically blocked by anti-IL-4 Ab. On the other hand, sIgE⁺ and sIgG4⁺ B cells from both NS and AD patients spontaneously produced IgE and IgG4, respectively, and this production was not affected by T cells, anti-IL-4 Ab, or anti-IL-13 Ab. These results indicate that IL-13 is involved in the enhanced production of IgE and IgG4 in NS, while IL-4 is involved in these responses in AD.     

遗传过敏性皮炎患者血清IL—4水平与IgE的关系

采用酶联免疫技术检测２１例遗传过敏性皮炎患者血清白细胞介素４（ＩＬ－４）及ＩｇＥ水平。实验结果发现，ＡＤ患者血清ＩＬ－４水平比正常人显著增高，并且与ＩｇＥ密切相关。说明ＡＤ的发病与ＩＬ－４产一失调，从而导致Ｂ细胞合成ＩｇＥ增加有关。人ＩＬ－４酶联免疫检测具有敏感、特异、简便、快速及结果可靠等特点。     

IgE production in atopic patients is not related to IL-4 production.

To analyse whether there is a general defect in T or B cell function in atopic individuals we have measured cytokine and IgE production by peripheral blood lymphocytes, isolated from 19 atopic donors (17 asthma/rhinitis and two dermatitis patients) in comparison with 19 non-atopic controls. After stimulation of lymphocytes with anti-CD2 and anti-CD28, we found no significant difference in IL-2, IL-4 and interferon-gamma (IFN-gamma) production. To examine the correlation between the production of IgE and IL-4, we stimulated lymphocytes with anti-CD2 and rIL-2. Under this condition both T cell IL-4 and B cell IgE production can be measured. No significant difference was found for the amount of IgE and IL-4 produced between the two groups (P > 0.05). The non-atopic donors showed a good correlation between IL-4 and IgE production (r = 0.70). Surprisingly, within the atopic group there was no correlation between IgE and IL-4 production at all (r = -0.04). The ratio of IgE to IL-4 was higher (although not significantly) in the atopic group. Our data suggest that in atopic donors IgE production is less dependent on IL-4, and that other cytokines are involved.     

Relationships between natural T cells, atopy, IgE levels, and IL-4 production

BACKGROUND: Th2 cells govern allergic disorders. Mechanisms leading to the Th2 commitment are dominated by the requirement of IL-4. A potential source of this triggering IL-4 could be the CD4 + subset of a small population of T cells, natural T (NT) cells. Indeed, this subset is involved in IgE responses in mice and produces promptly high amounts of IL-4 in both mice and man. METHODS: NT cells were identified in peripheral blood by flow cytometry with antibodies against Valpha24 and Vbeta11, recognizing the T-cell receptor specific for NT cells. Simultaneous staining with anti-CD3, anti-CD4, or anti-CD8 antibodies was performed. The frequency of NT cells in man was studied according to the presence of atopy defined by the positivity of skin tests, according to total IgE levels in serum, and according to IL-4 concentration of whole-blood culture supernatants determined by a flow cytometer microsphere-based assay. RESULTS: Seventy subjects were included, of whom 30 were atopic. The number of CD4+ NT cells was higher in atopics than in nonatopics (P=0.009). This number was correlated to the total IgE levels (r = 0.34, P = 0.03). In addition, the number of CD4 + NT cells, but also of CD8 + NT cells, was correlated to the levels of IL-4 (r=0.71, P=0.01, and r=0.6, P=0.03, respectively). CONCLUSIONS: These results show that the number of NT cells, particularly the CD4+ subset, is related to atopy, IL-4 production, and IgE levels. Therefore, this population of T cells is likely to play a role in the Th2 commitment initiating atopic diseases.     

The role of IL-13 in IgE synthesis by allergic asthma patients

IgE antibodies play a crucial role in allergic type I reactions. Only IL-4 and IL-13 are able to induce an immunoglobulin isotype switch to IgE in B cells. A major question is to what extent these cytokines contribute to the production of IgE in allergic patients. To address this question we used an in vitro culture system in which the production of IgE is dependent on endogenously produced IL-4 and IL-13. In cultures of purified T and B cells from allergic asthma patients and non-atopic controls, T cells were polyclonally stimulated to obtain IL-4, IL-13 and subsequently IgE secretion. The absolute amount of IgE produced was not significantly different between patients and controls. When neutralizing IL-4 antibodies were included during culture, the production of IgE was dramatically inhibited in both patients and controls (production of IgE was reduced to 12%). However, neutralization of IL-13 led to a significantly stronger inhibition of IgE production in the patient group: production of IgE was reduced to 23 ± 3% versus 50 ± 10% in the control group. Corresponding with these results, we also observed a higher production of IL-13 by the patients, while the production of IL-4 was not significantly different. A more detailed analysis of the production of IL-13 revealed that patients' T cells were less sensitive to a negative signal controlling IL-13 production. Our results indicate that, at least in vitro, IgE production in allergic asthma patients is more dependent on IL-13 than in non-atopics, due to enhanced IL-13 production and to enhanced IgE production in response to IL-13.