重症肺炎链球菌感染患儿淋巴细胞亚群与血清免疫球蛋白及其亚类表达的变化

目的 探讨重症肺炎链球菌感染患儿淋巴细胞亚群与血清免疫球蛋白及IgG亚类水平的变化.方法 收集2009年1月-2010年1月在首都儿科研究所呼吸科住院的27例重症肺炎链球菌肺炎婴幼儿为病例组,65例健康儿童为健康对照组.分别采用流式细胞仪与散射比浊法测定二组儿童细胞免疫(CD3+、CD3+CD4+、CD3+CD8+、CD4+/CD8+、CD19+、NK细胞)与体液免疫(IgG、IgA、IgM)及IgG亚类(IgG1、IgG2、IgG3、IgG4)水平.结果 1.与健康对照组比较,病例组患儿外周血CD3+CD4+数量降低(t=0.000,P<0 05),CD3+CD8+(t=0.000,P<0.05)、CD4+/CD8+(t=0.013,P<0.05)、IgA(t=0.004,P<0.05)、IgM(t=0.000,P<0.05)、IgG2(t=0.018,P<0.05)显著升高.2.病例组患儿中检出IgG亚类缺陷11例(占40.74%),以IgG2、IgG4缺陷为主.3.与健康对照组比较,11例IgG亚类缺陷患儿CD3+CD4+(t=0.006,P<0.05)、CD4+/CD8+(t=0.015,P<0.05)均显著降低,CD3+CD8+(t=0.013,P<0.05)、NK细胞计数(t=0.045,P<0.05)均显著升高.结论 重症肺炎链球菌感染患儿存在细胞免疫和体液免疫紊乱以及IgG亚类缺陷.

Changes of Lymphocyte Subsets,Serum Immunoglobulin and Its Subsets in Children with Severe Streptococcus Pneumoniae Infection

Objective To investigate the changes of lymphocyte subsets,serum immunoglobulin and its subsets of severe streptococcus pneumoniae infection in children.Methods Twenty-seven children with severe streptococcus pneumoniae pneurnonia in Department of Respiratory,Capital Institute of Pediatrics from Jan.2009 to Jan.2010 were selected as the research group,and 65 healthy children were selected as the healthy control group.Flow cytometry method and nephelometry were used to detect the levels of cytoimmunity [CD3+...