TY - T1的血液嗜酸性粒细胞哮喘严重程度不同的白三烯C4生产JF -欧洲呼吸杂志》乔欧元和J SP - 1465 LP - 1472 - 10.1183 / 09031936.95.08091465六世- 8 - 9盟Laviolette M盟——Ferland C盟——Comtois摩根富林明AU -香槟,K AU -博斯米非盟- Boulet LP Y1 - 1995/09/01 UR - //www.qdcxjkg.com/content/8/9/1465.abstract N2 -在哮喘,激活和招募嗜酸性粒细胞到支气管黏膜,放大许多细胞功能。血液嗜酸性粒细胞计数和低密度嗜酸性粒细胞数量随着哮喘严重程度的增加而增加。嗜酸性粒细胞对各种激动剂产生大量促炎介质,特别是肽白三烯(LT) C4,一种有效的支气管收缩剂。在这项研究中,我们评估了正常个体和不同严重程度哮喘患者的血液嗜酸性粒细胞LTC4释放及其细胞因子的调节:轻度(β 2-激动剂需用);中度(定期吸入类固醇);严重的(定期吸入和口服类固醇)。使用改进的Percoll梯度技术分离嗜酸性粒细胞,该技术在全球细胞群中恢复了低密度和正常密度嗜酸性粒细胞。嗜酸性粒细胞仅在刺激(钙离子载体A23187, 2微米)存在时释放出可检测量的LTC4。离子胞诱导的LTC4释放在中度哮喘患者(平均+/- SEM 5.7 +/- 1.3 pg x 10(3)/ 250000嗜酸粒细胞)中高于正常人(1.6 +/- 0.4 pg x 10(3)/ 250000嗜酸粒细胞)、轻度哮喘患者(1.8 +/- 0.3 pg x 10(3)/ 250000嗜酸粒细胞)和重度哮喘患者(2.0 +/- 0.3 pg x 10(3)/ 250000嗜酸粒细胞)。 Granulocyte/macrophage colony-stimulating factor (GM-CSF) and interleukin-5 (IL-5) amplified the ionophore-induced LTC4 release in the four groups from 1.9 to 2.6 and 1.9 to 2.8 fold, respectively. Interleukin-3 (IL-3) did not increase LTC4 production except by the eosinophils of the severe asthmatics whose ionophore-induced LTC4 production was enhanced by 1.9 fold. These data demonstrate that the asthmatic bronchial inflammatory process may modify blood eosinophil LTC4 release and its modulation by cytokines according to asthma severity and treatment. ER -