调节性T细胞/Th17细胞失衡在血液系统疾病发病中的作用

摘要

国内外研究证实,CD4+ CD25+ Foxp3+调节性T细胞(CD4+ CD25+ Foxp3+ regulatoryTcells,简称Treg细胞)/Th17细胞失衡与多种血液病的发病密切相关.肿瘤性血液病如白血病、淋巴瘤存在Treg细胞水平上调Th17水平下调,可能与Treg诱导免疫抑制增强、Th17介导抗肿瘤免疫缺陷相关；而非肿瘤性血液病如再生障碍性贫血、过敏性紫癜、免疫性血小板减少性紫癜等存在Treg水平下调、Th17水平上调,可能与Th17介导过度免疫损伤、Treg介导免疫抑制功能不足有关.提示Treg细胞/Th17细胞比率升高可能对肿瘤性血液病的发生起促进作用,其比率降低则可能对非肿瘤性血液病的发生起促进作用.%Scholars at home and abroad have proved that the unbalance between CD4 + CD25 + Foxp3 +regulatory T cells (Treg cells) and Th17 cells relates to the pathogenesis of hematopathy.Patients with tumor blood diseases,such as leukemia and lymphoma,generally show raised levels of Treg cells and decreased levels of Th17 cells.The pathogenesis of disease may involve in Treg cells inducing enhanced immune suppression and Th17 cells mediating immune deficiency.On the contrary,cases with non-neoplastic blood diseases,such as AA,HSP,ITP and so on,trend to have lower Treg cells and higher Th17 cells.The pathogenesis of non-neoplastic blood disease may be connected with serious immune injury mediated by Th17 cells and weak suppression of immunity induced by Treg cells.Accordingly,the increasing ratio of Treg cells/Th17 cells may cause tumor blood diseases,but a decreasing one can promote non-neoplastic blood disease.