NIU Han-jie,CHENG Xiao-xing,WANG Xin-jing,CAO Zhi-hong,DONG Mei,TONG Ai-hua.Reduced frequency of CD4+ central memory T cells in patients with tuberculosis[J].J Amry Med Univ (J Third Mil Med Univ),2009,31(16):1549-1551.
NIU Han-jie,CHENG Xiao-xing,WANG Xin-jing,CAO Zhi-hong,DONG Mei,TONG Ai-hua.Reduced frequency of CD4+ central memory T cells in patients with tuberculosis[J].J Amry Med Univ (J Third Mil Med Univ),2009,31(16):1549-1551.DOI:
目的 比较活动期肺结核患者和纯蛋白衍生物(purified protein derivative,PPD)试验阳性健康人记忆T细胞的产生和分布特性。 方法 取乙二胺四乙酸(ethylene diamine tetraacetic acid,EDTA)抗凝静脉血,Ficoll进行密度梯度离心获取PBMCs。采用卡介苗刺激后,通过CD4、CD154、CCR7、CD45RA 4种抗体共染色,用流式细胞仪检测结核抗原特异性CD4
+
记忆T细胞。 结果 以CD4
+
CD154
+
双阳性区设门,研究结核抗原特异性CD4+记忆T细胞,结果显示,肺结核患者CD4+CD154
+
CD45RA
-
CCR7
+
中央型T淋巴细胞亚群分布频率显著降低(P0.05),CD4
+
CD154
+
CD45RA
+
CCR7
+
初始T细胞亚群的比例明显增高(P0.05)。 结论 肺结核患者CD4
+
中央型记忆T淋巴细胞亚群的产生存在异常,可能与免疫功能低下和结核病发病密切相关。
Abstract
Objective To compare the production and population frequency of mycobacterial antigen-specific CD4
+
memory T cells in patients with pulmonary tuberculosis (TB) and normal individuals with positive purified protein derivative (PPD
+
). Methods PBMCs were isolated from TB patients and PPD
+
normal human peripheral blood and stimulated with Bacillus Calmette Guerin (BCG). Memory T cells were investigated with surface staining of CD4
CD154
CCR7
and CD45RA and flow cytometry. Re
sults Compared with PPD
+
normal individuals
patients with pulmonary tuberculosis had significantly reduced frequency of CD4
+
CD154
+
CD45RA
-
CCR7
+
central memory T cells subsets (P0.05) and elevated frequency of CD4
+
CD154
+
CD45RA
+
CCR7
+
naive T cells subsets (P0.05). Conclusion Reduced frequency of central memory T cells subsets in pulmonary tuberculosis might play an important role in the development of tuberculosis.