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- Title
Enhancement of the TCRζ Expression, Polyclonal Expansion, and Activation of T Cells from Patients with Acute Myeloid Leukemia After IL-2, IL-7, and IL-12 Induction.
- Authors
Shi, Li; Chen, Shaohua; Zha, Xianfeng; Xu, Yan; Xu, Ling; Yang, Lijian; Lu, Yuhong; Zhu, Kanger; Li, Yangqiu
- Abstract
Defective T cell receptor (TCR) signaling resulting in lower T cell function plays a crucial role in the pathogenesis of T cell immunodeficiency in leukemia. Previous studies have indicated that lower TCRζ levels are a common characteristic of patients with leukemia, and upregulating TCRζ could partially recover T cell function. In this study, we characterized the effect of the stimulating factor induction on the TCRζ, Zap-70, and FcɛRIγ levels, IFN-γ secretion, and the distribution and clonal expansion of TCR Vβ subfamilies in CD3+ T cells sorted from peripheral blood from acute myeloid leukemia (AML) patients. The induction included single stimulating factor or a combination with different cytokines (IL-2, IL-7, IL-2+IL-7, IL-7+IL-12, CD3, CD3+CD28 antibody, CD3+CD28 antibody+IL-2, and CD3+CD28 antibody+IL-7) at 72 h. The results showed that increased TCRζ and Zap-70 levels with deceased FcɛRIγ in T cells after induction, and different responses to cytokine in T cell from different cases may indicate the heterogeneity of T cells and different immune statuses in different AML cases. Increased IFN-γ levels in T cells from AML patients were detected after induction in the IL-12+IL-7, CD3+CD28+IL-2, and CD3+CD28+IL-7 groups. Moreover, the number of TCR Vβ subfamily T cells expressed was increased; however, all of the TCR Vβ subfamily T cells in the AML patients could not be completely recovered after induction. In conclusion, the cytotoxicity and activation function of T cells could be enhanced after induction by different stimuli accompanied by an increase in TCRζ and Zap-70 and recovery of the TCR Vβ repertoire in AML patients.
- Subjects
HUMAN T cell receptors; IMMUNODEFICIENCY; LEUKEMIA treatment; ENDOTHELIAL growth factors; MYELOID leukemia; INTERLEUKIN-2; INTERLEUKIN-7; INTERLEUKIN-12; PATIENTS
- Publication
DNA & Cell Biology, 2015, Vol 34, Issue 7, p481
- ISSN
1044-5498
- Publication type
Article
- DOI
10.1089/dna.2015.2810