Journal of Cancer Research and Clinical Oncology

, Volume 138, Issue 6, pp 1011–1017

Quantification of ZAP-70 mRNA by real-time PCR is a prognostic factor in chronic lymphocytic leukemia

  • Yin-Hua Wang
  • Zhi-Jian Zou
  • Ling Liu
  • Li-Na Zhang
  • Cheng Fang
  • Dan-Xia Zhu
  • Lei Fan
  • Jian-Yong Li
  • Wei Xu
Original Paper

DOI: 10.1007/s00432-012-1177-3

Cite this article as:
Wang, YH., Zou, ZJ., Liu, L. et al. J Cancer Res Clin Oncol (2012) 138: 1011. doi:10.1007/s00432-012-1177-3

Abstract

Background

Chronic lymphocytic leukemia (CLL) is heterogeneous with respect to prognosis and clinical outcome. Mutational status of immunoglobulin heavy chain variable region (IGHV) appears to be a particularly strong prognostic marker, but it is difficult to perform in a routine clinical laboratory. ζ-chain-associated protein kinase 70 kDa (ZAP-70) protein detected by flow cytometry is a strong surrogate marker of IGHV mutational status; however, it suffers from the lack of standardization.

Methods

We investigated whether ZAP-70 mRNA expression level can be a prognostic factor in CLL. Real-time quantitative polymerase chain reaction was used to analyze ZAP-70 mRNA expression from 102 CLL patients.

Results

The expression of ZAP-70 mRNA was significantly associated with Binet stage (P < 0.001), lactate dehydrogenase (P = 0.003), ZAP-70 protein (P = 0.018), IGHV mutational status (P = 0.038), and cytogenetic abnormality of del(17p13) or del(11q22.3) (P = 0.037) in CLL patients. According to receiver operating characteristic curve analysis for ZAP-70 mRNA and ZAP-70 protein, positive ZAP-70 mRNA (P = 0.006) was an adverse factor in determining the treatment free survival (TFS). In a multivariate Cox analysis of TFS, ZAP-70 mRNA is not ideal as an independent prognostic factor. However, ZAP-70 mRNA was statistically significant in predicting treatment response.

Conclusion

This study demonstrated the value of determination of ZAP-70 mRNA in providing useful prognostic information in CLL patients. However, ZAP-70 mRNA is not an independent prognostic factor.

Keywords

Chronic lymphocytic leukemia ZAP-70 Real-time quantitative PCR Prognosis 

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  • Yin-Hua Wang
    • 1
  • Zhi-Jian Zou
    • 1
  • Ling Liu
    • 1
  • Li-Na Zhang
    • 1
  • Cheng Fang
    • 1
  • Dan-Xia Zhu
    • 1
  • Lei Fan
    • 1
  • Jian-Yong Li
    • 1
  • Wei Xu
    • 1
  1. 1.Department of HematologyThe First Affiliated Hospital of Nanjing Medical University, Jiangsu Province HospitalNanjingChina

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