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Alternative expression of TCRζ related genes in patients with chronic myeloid leukemia

Journal of Hematology and Oncology, ISSN: 1756-8722, Vol: 5, Issue: 1, Page: 74
2012
  • 19
    Citations
  • 0
    Usage
  • 17
    Captures
  • 2
    Mentions
  • 0
    Social Media
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  • Citations
    19
  • Captures
    17
  • Mentions
    2
    • News Mentions
      1
      • 1
    • References
      1
      • 1

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Article Description

A previous study has demonstrated a significant decrease in the TCRζ gene expression level in chronic myeloid leukemia (CML); thus, we further investigated the expression of TCRζ-regulating factors, the distribution of the TCRζ 3' untranslated region (3'-UTR) splice variants, and the expression level and correlation of the alternative splicing factor/splicing factor 2 (ASF/SF-2), FcεRIγ and ZAP-70 genes. TCRζ 3'-UTR splice variants were identified in peripheral blood mononuclear cells (PBMCs) from 14 healthy individuals, 40 patients with CML and 22 patients with CML in complete remission (CML-CR) by RT-PCR. The expression level of the TCRζ, FcεRIγ, ASF/SF-2 and ZAP-70 genes was analyzed by real-time quantitative PCR. While the expression of TCRζ gene in the CML group was significantly lower than that in the healthy individual and CML-CR groups, a significantly higher expression of the FceRIγ and ASF/SF-2 genes was found in the CML group. Two types of splicing forms were detected in all of the healthy individual CML-CR cases: wild type (WT) TCRζ 3'-UTR and alternatively splieced (AS) TCRζ 3'-UTR which have been alternatively splieced in the WT TCRζ 3'-UTR. However, 35% of the CML cases contained only the wild type TCRζ 3'-UTR isoform. Based on the TCRζ 3'-UTR isoform expression characteristic, we divided the patients with CML into two subgroups: the WTAS CML group, containing patients that express only the wild type TCRζ 3'-UTR, and the WTAS CML group, which contained patients that expressed two TCRζ 3'-UTR isoforms. A significantly different ASF/SF-2 and FcεRIγ gene expression pattern was found between the WTAS and WTASCML groups. We concluded that defective TCRζ expression may be characterized in the WTASand WT ASCML subgroups by the different gene expression pattern. The overexpression of ASF/SF2, which alternatively splices the TCRζ 3'-UTR, is thought to participate in feedback regulation. The characteristics of TCRζ 3'-UTR alternative splicing may be a novel immunological marker for the evaluation of the CML immune status. © 2012 Zha et al.; licensee BioMed Central Ltd.

Bibliographic Details

Zha, Xianfeng; Yan, Xiaojuan; Shen, Qi; Zhang, Yuping; Wu, Xiuli; Chen, Shaohua; Li, Bo; Yang, Lijian; Geng, Suxia; Weng, Jianyu; Du, Xin; Li, Yangqiu

Springer Science and Business Media LLC

Biochemistry, Genetics and Molecular Biology; Medicine

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