Distinct characteristics of e13a2 versus e14a2 BCR-ABL1 driven chronic myeloid leukemia under first-line therapy with imatinib
Open Access
- 16 May 2014
- journal article
- research article
- Published by Ferrata Storti Foundation (Haematologica) in Haematologica
- Vol. 99 (9), 1441-1447
- https://doi.org/10.3324/haematol.2013.096537
Abstract
The vast majority of chronic myeloid leukemia patients express a BCR-ABL1 fusion gene mRNA encoding a 210 kDa tyrosine kinase which promotes leukemic transformation. A possible differential impact of the corresponding BCR-ABL1 transcript variants e13a2 (“b2a2”) and e14a2 (“b3a2”) on disease phenotype and outcome is still a subject of debate. A total of 1105 newly diagnosed imatinib-treated patients were analyzed according to transcript type at diagnosis (e13a2, n=451; e14a2, n=496; e13a2+e14a2, n=158). No differences regarding age, sex, or Euro risk score were observed. A significant difference was found between e13a2 and e14a2 when comparing white blood cells (88 vs. 65 × 109/L, respectively; Pvs. 430 × 109/L, respectively; PP=0.002 for major molecular response; Pversus e14a2 BCR-ABL1 transcript type at diagnosis. (clinicaltrials.gov identifier:00055874)Keywords
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