哮喘患者血浆白细胞介素-18水平测定及其临床意义的研究

目的探讨白细胞介素(IL)-18在支气管哮喘发病机制中的作用。方法收集30例哮喘患者和15名健康对照者的血浆,采用酶联免疫吸附试验(ELISA)检测血浆中IL-18、IL-12和IL-13的水平。结果哮喘组血浆IL-18、IL-13水平明显高于对照组,IL-12水平则显著低于对照组,差异有显著性(P<0.01)。哮喘组IL-18和IL-13呈显著正相关(P<0.05)。结论IL-18可能参与了哮喘的发病过程,它通过调节Th1/Th2的活性及细胞因子的产生,在哮喘的发病过程中发挥作用。     

血常规分析仪不能替代显微镜检查

近年来，随着科技进步及计算机的广泛使用，临床实验室大量引进了一些自动化仪器，使得实验室对临床标本的处理更加简单、快速、准确，有效减轻了检验人员的工作量，提高了工作效率。但是对某些疾病如果单纯完全依赖实验室仪器，而忽略了镜检结果可造成疾病的误诊或漏诊，影响了对患者疾病诊断的准确性和治疗效果。现将在临床中发现的漏诊病例进行分析，希望能引起检验人员的重视，针对可疑结果进行镜检。     

急性白血病患儿T淋巴细胞亚群及血清白三烯B4含量变化的临床意义

目的 探讨急性白血病(AL)患儿外周血T淋巴细胞亚群和血清白三烯B4含量的变化及临床意义.方法 用免疫荧光流式细胞技术检测40例AL患儿(观察组)及40名正常儿童(对照组)外周血T淋巴细胞亚群CD3+T细胞、CD4+T细胞和CD8+T细胞水平及自然杀伤(NK)细胞活性;同时采用酶联免疫吸附试验(ELSA)方法检测上述AL患儿与正常儿童血清白三烯B4含量的变化情况.结果 AL患儿CD3+T细胞[(49.51±6.53)%]、CD4+T细胞[(22.15±4.87)%]及CD8+T细胞[(23.41±3.96)%]均低于对照组[分别为(67.63±5.23)%、(34.43±5.07)%(28.17±4.61)%],差异有统计学意义(t=13.698、t=11.047、t=4.953,P＜0.01);AL患儿自然杀伤细胞活性[(5.41±4.25)%]明显低于对照组[(13.10±4.91)%],差异有统计学意义(t=7.498,P＜0.01);而AL患儿血清白三烯B4含量[(25.23±6.24)ng/L]明显高于对照组[(8.28±2.53)ng/L],差异有统计学意义(t=15.921,P＜0.01).结论 AL患儿T淋巴细胞亚群及白三烯B4发生明显改变,对揭示AL发病机制提供重要的理论依据.

Abstract：

Objective To study the changes of T lymphocyte subtype levels and serum levels of leukotriene B4 ( LTB4 )in children with acute leukemia (AL). Methods The activity of T lymphocyte subsets:CD3+ T cells,CD4+ T cells,CD8 + T cell levels and NK cell were detected in 40 cases of AL and 40 control by Flow Cytometry(FCM). The serum level of LTB4 was measured by ELISA in all subjects. Results Compared with normal control , the percentages of CD3 + T cells ( [ 49.51 ± 6.53 ] ％ vs [ 67.63 ± 5.23 ] ％ ), CD4 + T cells ([22.15±4.87]％ vs [34.43 ±5.07]％),CD8+ T cell ([23.41 ±3.96]％ vs [28. 17 ±4.61]％),NK cell ( [5.41 ± 4.25 ] ％ vs [ 13.10 ± 4.91 ] ％ ) were significantly lower in children AL patients, ( Ps ＜0.01 ). However,the serum levels of LTB4 increased significantly in AL patients compared with normal control ( [ 25.23 ± 6.24 ] ng/L vs [ 8.28 ± 2.53 ] ng/L, P ＜ 0.01 ). Conclusion T lymphocyte subtype and serum level of LTB4 showed significant changes in children AL patients compared with normal control, which revealed an important theoretical basis to AL pathogenesis.