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1.
过敏性哮喘患者细胞因子对IgE生成机制的探讨   总被引:2,自引:0,他引:2  
对30例过敏性哮喘患者发作期和缓解期及30例健康成年人的外周血,采用ELISA双抗体夹心法,测定血清IgE,可溶性白细胞介素-2受体(sIL-2R)和白细胞介素-4(IL-4)水平,生物学方法测定血清IL-2水平和3H-TdR掺入法定量测定血清IL-6。结果:过敏性哮喘患者发作期血清IgE、sIL-2R、IL-4和IL-6水平明显升高,与缓解期和对照组有明显差异(P<0.01),而发作期血清IL-2水平明显下降,与缓解期和对照组有明显差异(P<0.01),且血清IgE分别与sIL-2R和IL-4水平有明显正相关(P均<0.01),与IL-2水平有明显负相关(P<0.01)。说明IgE合成增加是过敏性哮喘的关键,细胞因子有促进B细胞合成IgE的作用,并且直接参与过敏性哮喘气道炎症的形成。  相似文献   

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目的 观察呼吸道合胞病毒(RSV)感染对哮喘患儿螨诱导单个核细胞(PBMC)表达白细胞介素4(IL-4)和IL-5的影响及其与哮喘的关系。方法 用 联免疫吸附试验(ELISA)及逆转录(RT)-聚合酶链反应(PCR)法 30例螨过敏哮喘患儿「其中RSV感染者16例(A组),无RSV感染者14例(B组)」和10名年龄组正常对照组(C组)的外周血PBMC经螨诱导表达IL-4及IL-5的水平,并分析其与  相似文献   

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目的:探讨各型乙型肝炎患者血清sIL-2R、IFN-γ和IL-1变化及其临床意义。方法:收集急性肝炎、慢性肝炎、慢性重型肝炎和活动性肝硬变患者血清标本各16例,16健康人血清标本作为正常对照组,采用酶联免疫吸附试验(EIFSA)检测各型乙型肝炎患者血清中sIL-2R和IFN-γ水平,采用MTT法检测各型乙型肝炎患者血清中IL-1水平,并与正常对照组进行比较。结果:急性肝炎患者血清sIL-2R、IF  相似文献   

4.
Liu X  Lin H  Yuan G  Huang F 《中华内科杂志》1999,38(7):448-450
目的 了解系统性红斑狼疮(SLE)患者血清白细胞介素-6(IL-6)和可溶笥白细胞介素-6受体(sIL-6R水平及其与临床活动性指标的相关性,并初步探讨其IL-6信号传导途径。方法 采用MTT比色法和酶联免疫吸附实验(ELISA)法分别检测16例SLE(9例活动,7例非活动)、17例活动期类风湿关节炎(RA)患者及29例正常人血清IL-6和sIL-6R水平。并在体外用IL-6刺激分离单个核细胞后,  相似文献   

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MDS患者白细胞介素2受体表达研究   总被引:1,自引:0,他引:1  
本实验以28例MDS(RA18例、RAEB和RAEB-T10例)和10例ANLL为研究对象,采用APAAP和ELISA法检测患者外周血单个核细胞(PHA刺激前后)的MIL-2R和培养血清中STL-IR,结果表明:经PHA刺激培养48h后,MDS和ANLL患者Tac抗原阳性率明显低于正常人(P<0.01)RAEB和RAEB-t组Tac+率比RA低,与ANLL差异无显著性(P>0.05);血清中STL-2R在MDS各亚型中均高于正常对照组(P<0.05),其中以RAEB及RAEB-t为著。认为MDS患者免疫反应及监视能减弱;STR-2R与mIL-2R无相关;IL-2R表达异常可能与造血抑制有关。  相似文献   

6.
目的探讨外周血单个核细胞(PBMC)中白细胞介素(IL)6mRNA表达与血嗜酸细胞阳离子蛋白(ECP)和1秒用力呼气容积占用力肺活量比值(FEV1%)的关系。方法对12例过敏性哮喘发作期患者、8例缓解期患者及9例健康人,采用RTPCR法和图像分析半定量法检测PBMC中IL6mRNA的表达水平及ECP和FEV1%。结果发作期患者IL6mRNA的表达明显高于缓解期患者和健康人(P<001),而缓解期患者无明显升高。发作期患者IL6mRNA的表达水平与血清ECP呈中度正相关(r=0679,P<001),而与FEV1%呈中度负相关(r=-0589,P<005)。结论过敏性哮喘发作期患者PBMC中IL6mRNA表达水平显著增强。其气道炎症程度与IL6基因转录增强有关  相似文献   

7.
哮喘患者血清可溶性细胞间粘附分子-1水平测定及临床意义曹国强杨肇亨本实验用ELISA方法,测定了15例哮喘患者不同时期血清中可溶性细胞间粘附分子-1(sICAM-1)含量,以观察其在哮喘不同时期是否发生了变化,并探讨该变化在哮喘过敏性炎症中的临床意义...  相似文献   

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目的 探讨外周血单个核细胞(PBMC)中白细胞介素(IL)-6mRNA表达与血嗜酸细胞阳离子蛋白(ECP)和1秒用力呼气容积占用力肺活量比值(FEV1%)的关系。方法 对12例过敏性哮喘发作期患者、8例缓解期患者及9例健康人,采用RT-PCR法和图像分析半定量法检测PBMC中IL-6mRNA的表达水平及ECP和FEV1%。结果 发作期患者IL-6mRNA的表达明显高于缓解期患者和健康人(P〈0.0  相似文献   

9.
支气管哮喘患者IL-4、sICAM-1、IFNγ与IgE的相关性研究   总被引:2,自引:0,他引:2  
目的 探讨支气管哮喘患者血清中白介素- 4(IL- 4)、可溶性细胞粘附因子-1(sICAM- 1)、γ干扰素在支气管哮喘发病中的作用及与IgE水平的相关关系。方法 分别在支气管哮喘发作期、缓解期及口服强的松治疗后用ELISA双抗体夹心法分别测定血清中IL-4、sICAM- 1、IFNγ和IgE水平。结果 在支气管哮喘发作期血清IL-4、sICAM-1、IgE水平明显升高,IFNγ水平明显降低;在缓解期和经强的松治疗后,血清IL-4、sICAM- 1、IgE水平明显降低。结论 IL-4 可促进sICAM-1 表达及IgE分泌,并可抑制IFNγ的分泌,因此在支气管哮喘发病中起重要作用。  相似文献   

10.
目的 研究ECP与sIL-2R在哮喘病中的致病机制和关系。方法 采用酶免疫荧光法和BA-ELISA法分别测定30例健康者,61例重症支气管哮喘患者的血清ECP和sIL-2R值,并追踪测试37例患者治疗后血清ECP和sIL-2R水平。结果 急性期患者血清ECP,sIL-2R含量均明显高于对照组(P〈0.01),治疗后二者水平明显下降,较治疗前非常显著性差异(P〈0.01)。结论 ECP是促进气道炎症  相似文献   

11.
Basal hypothalamic bilateral electrolytic lesions were placed in White Leghorn cockerels causing functional castration and obesity. Other cockerels were surgically castrated. Determinations were made of the reproductive traits, weight of abdominal adipose tissues, weight and fat content of livers, fat in muscles and bones, hematocrits, plasma calcium, triglycerides, cholesterol, and phospholipid phosphorus before and after injections of chicken pituitaries (CP) into cocks bearing hypothalamic lesions (HL), and before and after injections of testosterone propionate (TP) into surgically castrated (SC) cocks. Treatment of HL cocks with CP partially restored reproductive behavior, but abdominal massage produced only seminal fluid without spermatozoa. The weight of the abdominal adipose tissue was used as a measure of adiposity since it varies directly with total body fat. Adiposity in HL cocks was 2.5 times greater than that of SC cocks. Injections of CP into HL cocks reduced adiposity by 60%. In contrast, injections of TP into SC cocks reduced body fat to normal. Injections with CP into HL cocks reduced moderately the weights of the hypertrophied fatty livers and reduced fat content toward normal, but livers remained abnormal. In surgically castrated cocks, livers remained normal. Functional or surgical castration depressed blood hematocrit values. Injections with TP restored hematocrit values in SC cocks. In contrast, injections of CP into HL cocks were virtually without effect upon the depressed hematocrit values.  相似文献   

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Androgens and estrogens are known regulators of fetal and postnatal lung development, but their levels in the developing lung have never been determined. We present here, for the first time, a gas chromatography-mass spectrometry (GC/MS) quantification of dihydrotestosterone, testosterone, androstenedione, and estradiol in canalicular, saccular, and alveolar stage lungs of both sexes. Testosterone, androstenedione, and estradiol were observed in all the analyzed lung samples from gestation day (GD) 16.5 to postnatal day (PN) 30, totalizing 383 individual mice. Levels of these three steroids decreased between birth and PN 5. In contrast, dihydrotestosterone was detected only in male samples on GD 19.5, PN 0, and PN 30. A significant sex difference was observed for testosterone and androstenedione but not for estradiol. Steroid levels were also determined in skinned hind legs for comparison. Three-way analysis of variance revealed that tissue (lung or leg) had a significant effect on testosterone levels for both sexes, but not on androstenedione and estradiol levels. Low but significant testosterone and androstenedione levels were observed in all the females and in prepubertal male samples. These levels must be sufficient to induce androgen receptor activation, as suggested by our recent report showing the presence of androgen receptor in the nucleus of several lung cells in corresponding developmental ages and sexes.  相似文献   

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Several endothelial growth factors induce both blood and lymphatic angiogenesis. However, a systematic comparative study of the impact of these factors on vascular morphology and function has been lacking. In this study, we report a quantitative analysis of the structure and macromolecular permeability of FGF-2-, VEGF-A-, and VEGF-C-induced blood and lymphatic vessels. Our results show that VEGF-A stimulated formation of disorganized, nascent vasculatures as a result of fusion of blood capillaries into premature plexuses with only a few lymphatic vessels. Ultrastructural analysis revealed that VEGF-A-induced blood vessels contained high numbers of endothelial fenestrations that mediated high permeability to ferritin, whereas the FGF-2-induced blood vessels lacked vascular fenestrations and showed only little leakage of ferritin. VEGF-C induced approximately equal amounts of blood and lymphatic capillaries with endothelial fenestrations present only on blood capillaries, mediating a medium level of ferritin leakage into the perivascular space. No endothelial fenestrations were found in FGF-2-, VEGF-A-, or VEGF-C-induced lymphatic vessels. These findings highlight the structural and functional differences between blood and lymphatic vessels induced by FGF-2, VEGF-A, and VEGF-C. Such information is important to consider in development of novel therapeutic strategies using these angiogenic factors.  相似文献   

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Sudden cardiac death (SCD) is a major cause of death worldwide, with an estimated U.S. annual incidence of 350,000 [1]. This review will examine the influence of race and ethnicity on SCD burden and risk factors, and review the available literature on resuscitation outcomes and primary prevention of SCD. An improved understanding of associations between race, ethnicity, and SCD may provide clues to mechanisms, lead to improved prevention of SCD, and ultimately reduce racial and ethnic disparities in the burden of SCD.  相似文献   

20.
To investigate the prevalence, self-awareness, and treatment of hypertension in Lhasa, Tibet, a total of 1370 native Tibetan aged ≥18 years were selected, using stratified proportional sampling. The study showed that the prevalence of hypertension was 51.2%, significantly higher in men (56.0%) than in women (48.0%) (P = .004). The hypertension prevalence increased with increasing age (77.8% in 60–74 y and 82.5% in ≥75 y groups) and was higher in urban, suburban, or agricultural area than in pastoral area (P < .001). The self-awareness, treatment, and control rate of hypertension were 63.5%, 24.3% and 7.7%, respectively. In multivariable regression analysis, age, urban residence, amount of daily intake of fat and oil, and body mass index <18.5 kg/m2 were independently associated with hypertension. In conclusion, hypertension was highly prevalent among native Tibetan people in Lhasa, and the rates of self-awareness, treatment, and control of hypertension were low.  相似文献   

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