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The coexpression of the apoptosis-related genes bcl-2 and wt1 in predicting survival in adult acute myeloid leukemia

Leukemia volume 16, pages 846–854 (2002)Cite this article

Abstract

The Wilms tumor gene wt1 and the protooncogene bcl-2 are upregulated in acute myeloid leukemia (AML) and are known to regulate or to inhibit the onset of apoptosis. Since wt1 has been shown to regulate the expression of bcl-2, we investigated the association of the expression of these genes and their prognostic relevance in AML. Leukemic blasts from the bone marrow of 152 patients with newly diagnosed AML were analyzed for bcl-2 and wt1 mRNA expression using RT-PCR and quantitative PCR. Therapy outcome was correlated with the level of bcl-2 and wt1 transcripts. Bcl-2-specific mRNA was detectable in 127/152 (84%) patients and wt1 mRNA in 113/152 (74%) patients with AML. In monocytic subtypes the frequency of bcl-2 and wt1 transcripts was significantly lower. The expression of bcl-2 mRNA was correlated significantly with that of wt1 mRNA (P < 0.0001). In AML patients <60 years, high expression of bcl-2 and wt1 was associated with a reduced rate of continuing complete remission (CCR, P = 0.002 and P = 0.005, respectively) and increased death rate (P = 0.0002 and P = 0.04, respectively) in contrast to patients >60 years, where the expression of bcl-2 or wt1 had no prognostic impact. Based on the coexpression of bcl-2 and wt1, we established a prognostic model defining three risk groups with significant differences in CCR rate (P = 0.01), overall survival (P < 0.04) and disease-free survival (P < 0.03). Thus, bcl-2 and wt1 mRNA expression are associated with response and long-term outcome in AMLs. The coexpression of these genes allows determination of prognostic groups with high predictive value for overall and disease-free survival.

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Acknowledgements

The authors would like to acknowledge the excellent technical support of Mrs Susanne Christ and Mr Bernd Schneider. Supported by the Adolf Messer Stiftung, Bad Homburg, Germany.

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Authors and Affiliations

  1. Medical Clinic III, Hematology/Oncology, Ulm/Donau, Germany

    T Karakas & U Maurer

  2. Medical Clinic III, Hematology/Oncology, Frankfurt/Main, Germany

    CC Miething, E Weidmann, D Hoelzer & L Bergmann

  3. Department of Biomathematics, Institute for Medical Biometrics, University of Frankfurt, Frankfurt/Main, Germany

    H Ackermann

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Karakas, T., Miething, C., Maurer, U. et al. The coexpression of the apoptosis-related genes bcl-2 and wt1 in predicting survival in adult acute myeloid leukemia. Leukemia 16, 846–854 (2002). https://doi.org/10.1038/sj.leu.2402434

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