Abstract
Chronic myeloid leukemia (CML) is a clonal hematopoietic stem cell disorder characterized by the presence of Philadelphia (Ph) chromosome. Wilms’ tumor gene 1 (WT1) plays an important role in leukemogenesis and can be useful as a molecular marker to detect minimal residual disease (MRD). The goal of this study was to evaluate WT1 expression and compare it with BCR-ABL1 expression in peripheral blood (PB) of CML patients, in order to explore the utility of WT1 as an alternative marker for MRD detection. Eighteen newly diagnosed CML patients (BCR-ABL1-p210-positive), 16 chronic CML patients with a history of imatinib therapy, and 18 normal individuals (BCR-ABL1-p210-negative) as controls were enrolled in this study. WT1 and BCR-ABL1 expression was evaluated by quantitative real-time polymerase chain reaction (Q-RT-PCR). Analysis of RT-PCR data was performed using REST Software (2009, QIAGEN, Valencia, USA). Data were analyzed by SPSS software (v.16.0) using Spearman’s rho and Kruskal-Wallis methods. WT1 expression in all PB samples of newly diagnosed CML patients was significantly higher than that of the normal individuals (P = 0.003). WT1 expression was not different in patients on imatinib therapy compared to normal individuals (P = 0.6), but it was significantly lower than that of the newly diagnosed CML patients (P = 0.001). There was no significant correlation between expression of WT1 and BCR-ABL1 and hematological findings in newly diagnosed CML patients. We confirm the oncogenic role of WT1 by WT1 upregulation in CML. Due to lack of significant correlation between BCR-ABL1 and WT1 expression, using WT1 as an additional marker for CML monitoring could not be applicable.
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Acknowledgments
This work was financially supported by grant TH92/13 from the Vice Chancellor for Research Affairs of the Ahvaz Jundishapur University of Medical Sciences. This paper is issued from the thesis of Saeideh Hajizamani.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the local ethics committee of the Ahvaz Jundishapur University of Medical Sciences (ajums.REC.1392, 341) and with the 1964 Helsinki declaration. Written informed consent was obtained from all patients and normal individuals.
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Hajizamani, S., Mohammadi-asl, J., Malehi, A.S. et al. Is Wilms’ tumor gene 1 a useful biomarker for detecting minimal residual disease in chronic myeloid leukemia (BCR-ABL1-p210-positive) patients?. Comp Clin Pathol 25, 713–720 (2016). https://doi.org/10.1007/s00580-016-2252-y
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DOI: https://doi.org/10.1007/s00580-016-2252-y