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目的 探究嗜酸粒细胞性支气管炎(EB)和咳嗽变异性哮喘(CVA)患者气道炎症细胞、细胞因子和炎性介质的特征,阐明两者存在不同气道炎性特征的可能机制.方法检测杭州市第一人民医院门诊收治的15例EB患者(EB组)、15例CVA患者(CVA组)、14例支气管哮喘(简称哮喘)患者(哮喘组)和14名健康体检者(健康对照组)诱导痰中嗜酸粒细胞(EOS)百分比;流式细胞仪检测白细胞介素(IL)-5及干扰素(IFN)-γ刺激的EOS表面CD69的表达;实时荧光定量PCR方法检测各组诱导痰上清液中前列腺素E2(PGE2)、白三烯C4(LTC4)、IL-5、IFN-γ mRNA的表达水平;酶联免疫吸附法(ELISA)检测各组诱导痰上清液中PGE2、LTC4、IFN-γ和IL-5蛋白表达水平.结果 EB组、CVA组、哮喘组诱导痰中EOS百分比分别为(15.8±3.2)%、(13.0±2.7)%和(11.6±4.5)%,均明显高于健康对照组的(1.0±0.4)%(均P<0.05).在IL-5和IFN-γ刺激下,EB组诱导痰中EOS表达CD69分别为1.49±0.42和1.51±0.52、CVA组分别为1.37±0.41和1.42±0.32、哮喘组分别为1.42±0.72和1.37±0.46,3组间差异无统计学意义,但较健康对照组(分别为0.42±0.21和0.39±0.12)差异均有统计学意义(均P<0.05).EB组、CVA组、哮喘组诱导痰中IL-5的mRNA及蛋白表达水平明显高于健康对照组(均P<0.05),但3组间差异无统计学意义;各组诱导痰中IFN-γ的mRNA及蛋白表达水平较健康对照组差异均无统计学意义.EB组诱导痰中PGE2浓度为(839±69)ng/L,明显高于CVA组的(33±8)ng/L、哮喘组的(25±6)ng/L和健康对照组的(24±8)ng/L(均P<0.01),后3组差异无统计学意义;EB组PGE2限速酶前列腺素氧化环化酶2(PTGS2)的mRNA水平表达量显著增加,较CVA组、哮喘组及健康对照组差异均有统计学意义(均P<0.01);CVA、EB和哮喘组诱导痰中LTC4浓度明显高于健康对照组(均P<0.05),CVA、EB及哮喘组中LTC4限速酶白三烯C4合成酶(LTC4S)的mRNA表达水平明显高于健康对照组(均P<0.05),EB组LTC4的mRNA及蛋白表达水平与CVA组和哮喘组比较,差异也有统计学意义(均P<0.05).CVA组、哮喘组诱导痰中LTC4/PGE2比值明显高于EB组(t值分别为8.67和13.12,均P<0.05).结论 EB患者诱导痰中PGE2高表达以及CVA组LTC4/PGE2比值较EB组显著增高,这两者可能是EB缺乏气道高反应性的炎症基础.Abstract: Objective To explore the characteristics of airway inflammatory cells, cytokines and inflammatory mediators in eosinophilic bronchitis (EB) and cough variant asthma (CVA) patients and to elucidate the underlying mechanism of distinct airway inflammation between EB and CVA. Methods This study included 15 patients with EB (EB group), 15 patients with cough variant asthma (CVA, CVA group), 14 patients with bronchial asthma (asthma group) and 14 healthy controls (healthy group). Percentage of eosinophils (EOS) in sputum induced by hypertonic saline was detected by FACS. The percentage of CD+69 EOS stimulated by interleukin-5 (IL-5) and interferon γ (IFN-γ) was also detected by FACS. The expression of leukotriene C4 synthase (LTC4S) and prostaglandin-endoperoxide synthase-2 (PTGS2) mRNA in sputum was measured by real-time PCR and the concentration of leukotriene C4 (LTC4) and prostaglandin E2(PGE2) in sputum was measured by ELISA. Results The percentage of EOS in induced sputum was 15.8±3.2 (EB group), 13.0±2.7 (CVA group) and 11.6±4.5 (asthma group), respectively, which were significantly higher than 1.0±0.4 in the healthy group. The difference was significant and the t value was 16.31, 15.23 and 14.21 respectively (P<0.05). After stimulated by IL-5 and IFN-γ, the percentage of CD+69 EOS in induced sputum was 1.5±0.4 and 1.5±0.5 (EB group), 1.4±0.4 and 1.4±0.3 (CVA group) and 1.42±0.72 and 1.37±0.46 (asthma group) respectively. There was no statistical significance between these 3 groups, but when compared with 0.4±0.2 and 0.4±0.1 in healthy group, the difference was significant(P<0.05). The expression of IL-5 mRNA and protein in induced sputum of EB group, CVA group and asthma group were higher than the healthy group and the difference was all statistically different (P<0.05), but there was no statistical significance between EB group, CVA group and asthma group. The expression of IFN-γ mRNA and protein in induced sputum of each group was not different when compared with healthy group (P>0.05). The concentration of PGE2 in induced sputum of EB group was(839±69)ng/L, which was higher than (33±8) ng/L of CVA group, (25±6) ng/L of asthma group and (24±8) ng/L of healthy group (all P<0.01). There was no statistical difference between CVA group, asthma group and healthy group. The expression of PTGS2 in induced sputum of EB group increased significantly; when compared with CVA group, asthma group and healthy group, the difference was significant (all P<0.01). The concentration of LTC4 in induced sputum of EB group, CVA group and asthma group was all higher than the healthy group (all P<0.05). The expression of LTC4S mRNA of EB group, CVA group and asthma group was also higher than the healthy group (all P<0.05). The expression of LTC4S mRNA and LTC4 in the EB group was higher than that in the CVA group and the asthma group (P<0.05). The value of LTC4/PGE2 in the CVA group and the asthma group was higher than that in the EB group (t=8.7 and 13.1, P<0.05). Conclusion These data suggest that the difference in airway function observed in subjects with eosinophilic bronchitis and CVA (or asthma) may be due to the results of differences in PGE2 production and an imbalance between the production of bronchoconstrictor LTC4 and bronchoprotective PGE2 lipid mediators. 相似文献
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嗜酸粒细胞性支气管炎的气道炎症和临床特点 总被引:20,自引:1,他引:20
目的 探讨嗜酸粒细胞性支气管炎 (eosinophilicbronchitis,EB)的诊断、治疗及其气道炎症特点。方法 采用Irwin慢性咳嗽解剖学诊断程序 ,对 86例慢性咳嗽患者进行病因诊断 ;通过诱导痰 ,分析痰液中细胞分类 ,分别采用荧光酶免疫法、酶联免疫吸附法测定诱导痰上清液中嗜酸粒细胞阳离子蛋白 (ECP)、白细胞介素 8(IL 8)的浓度 ,并以 9例正常人和 9例典型哮喘患者作对照组 ;吸入布地奈德干粉剂 2 0 0~ 4 0 0 μg ,每天 2次 ,治疗 4周 ,部分患者同时口服泼尼松 10~ 15mg/d或甲泼尼龙 8~ 12mg/d ,1周。结果 本组有 13例符合EB诊断 ,占慢性咳嗽的 15 % ,多表现为慢性干咳 ,肺功能正常 ,组胺激发试验阴性。EB诱导痰嗜酸粒细胞 (Eos)为 0 186 2± 0 16 32 ,ECP浓度为(2 5 3± 2 0 7)mg/L ,均较正常人升高 (P <0 0 1) ;糖皮质激素治疗 1周后 ,13例患者的咳嗽均消失。结论 EB是引起慢性咳嗽的一个重要原因 ,气道具有以Eos为主的炎症 ,糖皮质激素治疗效果良好。 相似文献
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<正>哮喘是一种由嗜酸性粒细胞(eosinophils,Eos)、肥大细胞、T淋巴细胞等多种细胞和细胞组分参与的气道慢性炎症疾病,其发病机制极为复杂,迄今尚未阐明。以往对哮喘中炎症细胞的研究多着重于Eos、肥大细胞等,学者多以Thl/Th2失衡来解释。随着对哮喘发生机制研究的不断深入以及临床上激素抵抗型哮喘的出现,近年提出了非嗜酸性粒细胞型哮喘(non-eosinophils asthma,NEA)的概念,在发生机制和临床特征上与传统的嗜酸性粒细胞哮喘(eosinophils asthma,EA)有着较大的区别,对治疗疗效也有一定的影响。 相似文献
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过敏性支气管哮喘(以下简称哮喘)是气道的一种慢性炎症性疾病,炎性细胞尤其是嗜酸性粒细胞(Eos)是哮喘气道炎症反应的主要效应细胞。激活的Eos通过释放主碱性蛋白、阳离子蛋白、白三烯(LTs)等有害物质在哮喘的组织损伤及临床症状的发生中发挥关键作用。Eos是由造血干细胞分化而来。传统的观点认为,个体发育成熟后造血干细胞的分化与成熟仅局限于骨髓。但近年的研究发现,造血干细胞在特定细胞因子和趋化因子协同作用下也可由骨髓释放出来,定位到各种组织与器官,然后在局部生长因子的调控下,再分化与成熟为特定的成熟细胞,即所谓“原位造血”。现就过敏性哮喘气道炎症与骨髓造血及原位造血Eos产生的关系作一介绍。 相似文献
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嗜酸性细胞凋亡与哮喘气道炎症 总被引:4,自引:0,他引:4
范宏斌 《国外医学:呼吸系统分册》1998,18(2):76-78
凋亡指细胞的程序性死亡。哮喘气道炎症有关的嗜酸性细胞(EC)的凋亡受细胞因子依赖型与非细胞因子依赖双重调节。巨噬细胞对凋亡细胞巨噬有助于哮喘气道炎症的消退,多咎药物可通过促进EC凋亡来治疗哮喘。本就此作一概述。 相似文献
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凋亡指细胞的程序性死亡。哮喘气道炎症有关的嗜酸性细胞(EC)的凋亡受细胞因子依赖型与非细胞因子依赖型双重调节。巨噬细胞对凋亡细胞的吞噬有助于哮喘气道炎症的消退,多种药物可通过促进EC凋亡来治疗哮喘。本文就此作一概述。 相似文献
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嗜酸粒细胞凋亡与哮喘气道炎症 总被引:15,自引:2,他引:15
嗜酸粒细胞凋亡与哮喘气道炎症戴爱国张平支气管哮喘(哮喘)是一种以嗜酸粒细胞(EOS)、肥大细胞反应为主的气道变应性炎症和气道高反应性(AHR)为特征的疾病。目前认为,气道炎症是哮喘AHR的基础,而无论过敏性还是非过敏性哮喘气道炎症都以EOS浸润和激活... 相似文献
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目的探讨儿童支气管哮喘、咳嗽变异性哮喘和急性支气管炎气道反应性特点及其临床价值,为临床诊断提供基础依据。方法回顾性分析2012年12月~2013年12月我院收治的以组胺为气道激发剂,采用气道反应性测定仪测定的40例支气管哮喘(A组)、40例咳嗽变异性哮喘(B组)及40例急性支气管炎(C组)儿童气道反应性变化及肺功能水平。结果 A组、B组和C组患儿肺功能指标FVC%、FEV1%、FEV1/FVC%、PEF%及MMEF%,两两比较差异无统计学意义(均P0.05);A组和B组患儿气道激发试验均为阳性,C组患儿气道激发试验阳性率为15.00%;3组患儿基础呼吸阻力(Rrscont)和基础呼吸传导率(Grscont)两两比较差异无统计学意义(均P0.05);3组患儿反应阈值(Dmin)和反应阈浓度(Cmin)两两比较差异有统计学意义(均P0.05)。结论气道反应性测定对不同呼吸系统疾病具有鉴别和指导治疗的作用,值得临床进一步推广使用。 相似文献
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嗜酸粒细胞性支气管炎患者气道炎症细胞及介质特征的探讨 总被引:18,自引:1,他引:18
目的观察嗜酸粒细胞性支气管炎(EB)诱导痰和支气管肺泡灌洗液(BALF)中细胞分类和炎症介质浓度,探讨EB的气道炎症特征。方法对43例EB(EB组)患者行诱导痰检查,将20例咳嗽变异型哮喘(CVA)患者(CVA组)、16例典型支气管哮喘(哮喘组)患者和21名健康人(健康对照组)行对照诱导痰检查,并对部分EB(11例)和CVA患者(10例)行支气管肺泡灌洗(BAL)。观察检测诱导痰、BALF中的细胞分类、嗜酸粒细胞阳离子蛋白(ECP)、白三烯C4(LTC4)和组胺的浓度。结果EB组患者诱导痰中嗜酸粒细胞(EOS)百分比为0.1130±0.1470,CVA组为0.1900±0.1800,哮喘组为0.3860±0.2670,与健康对照组(0.0020±0.0050)比较差异有统计学意义(P均<0.01);哮喘组与CVA组、CVA组与EB组比较差异均有统计学意义(P均<0.05);EB组BALF中EOS为0.011±0.016,CVA组为0.053±0.040,两组比较差异有统计学意义(P<0.05);EB组诱导痰中的ECP浓度为(0.62±0.66)mg/L、CVA组为(1.27±1.74)mg/L,对照组为(0.07±0.10)mg/L,3组间比较差异有统计学意义(P<0.01);CVA组诱导痰中的LTC4浓度为(0.65±0.62)μg/L,EB组为(0.39±0.61)μg/L,对照组为(0.15±0.11)μg/L,3组间比较差异有统计学意义(P分别<0.05、0.01);CVA组BALF中组胺浓度为(3.4±1.4)μg/L,EB组为(1.6±1.5)μg/L,两组比较差异有统计学意义(P<0.05)。结论EB组EOS炎症主要局限于中心气道,部分气道炎性介质水平低于CVA组。上述气道炎性特征可能是EB患者无非特异性气道高反应性的重要机制。 相似文献
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咳嗽变异性哮喘患者诱导痰中神经生长因子和白细胞介素-4水平及气道炎症特征初探 总被引:1,自引:0,他引:1
目的 通过观察咳嗽变异性哮喘(CVA)患者诱导中神经生长因子(NGF)和IL-4水平,初步探讨咳嗽变异性哮喘的气道炎症特征.方法 选咳嗽变异性哮喘患者36例及健康体检者23例,对受试者进行痰诱导,查诱导痰中细胞分类计数,酶联免疫吸附法检测诱导痰中NGF和IL-4水平.结果 (1)咳嗽变异性哮喘患者诱导痰中嗜酸性粒细胞百分数为8%,显著高于健康体检者(1%),差异有统计学意义(P<0.001).其中13例患者应用糖皮质激素联合长效β2受体激动剂(布地奈德/福莫特罗,每吸160μg/4.5μg,2吸/d)治疗1个月后,咳嗽症状明显好转,诱导痰中嗜酸性粒细胞百分数为2%,显著低于治疗前(5%),差异有统计学意义(P<0.05);但仍高于健康体检者.(2)咳嗽变异性哮喘患者诱导痰中NGF和IL-4浓度高于健康体检者,差异有统计学意义(P<0.05).其中13例患者经上述治疗后诱导痰中NGF和IL-4浓度下降,差异有统计学意义(P<0.05);但仍高于健康体检者.(3)相关性分析:诱导痰中嗜酸性粒细胞计数与诱导痰上清中NGF、IL-4浓度呈正相关(r分别为0.397、0.332,P<0.01).诱导痰上清中NGF与IL-4浓度呈正相关(r=0.728,P<0.01).结论 神经-免疫机制与咳嗽变异性哮喘嗜酸性粒细胞性炎症密切相关,NGF和IL-4参与并介导了这一炎症.糖皮质激素联合长效β2受体激动剂吸入治疗,能显著降低诱导痰中NGF、IL-4和嗜酸性粒细胞水平,减轻嗜酸性粒细胞性炎症.Abstract: Objective To observe sputum cytology counts, the levels of nerve growth factor (NGF) and IL-4 in cough variant asthma (CVA) patients and the change of their levels after using glucocorticoids combined with β2-adrenergic agonists one month, and to investigate CVA's characteristics of airway inflammation. Methods Totally 36 patients with untreated CVA were selected, as well as 23 healthy controls. Coughed up sputum cells were obtained and HE strained for differential cell counting in each enrolled patient. In induced sputum's supernatant, the levels of NGF and IL-4 were determined by ELISA.Results Before treatment, CVA patients had a median eosinophils (EOS) percentage of 8%, which was significantly higher than that after treatment (2%, P<0.05) and in healthy control group (1%, P<0. 001). The levels of NGF and IL-4 in induced sputum of CVA group were (9. 50 ± 1.69) ng/L and (257.37 ± 53.57) ng/L. After treatment, they were (8.78±1.02) ng/L and (228.60 ±52.93)ng/L in CVA group, (6.98±0.69) ng/L and (166.44±24.75) ng/L in healthy control group. The levels of NGF and IL-4 before and after treatment in the CVA group , as compared with the healthy control group, had statistically significant differences (all P<0.001). In CVA group before and after treatment, the level of NGF and IL-4 paired difference was significant (P<0.001). The percentage of induced sputum EOS correlated with sputum supernatant concentrations of NGF and IL-4 (P < 0.01). In induced sputum supernatant, the concentrations of NGF and IL-4 were significant correlated (P<0.01). Conclusions Glucocorticoid joint long-term β2 agonist inhaled treatment significantly reduced NGF, IL-4 and EOS levels and reduced eosinophilic inflammation, which are closely related with the nerve-immune mechanism, NGF as well as IL-4 participated the inflammation. Induced sputum examination is non-invasive, economical,simple, easily accepted by patients, and repeatable, widely used in clinical. 相似文献