Gene fusions are observed in abnormal chromosomal rearrangements such as translocations in hematopoietic malignancies, especially leukemia subtypes. Hence, it is critical to obtain correct information about these rearrangements in order to apply proper treatment techniques. To identify abnormal molecular changes in patients with leukemia, we developed a multiplex reverse transcriptase polymerase chain reaction (MRT-PCR) protocol and investigated more than 140 gene fusions resulting from variations of 29 prevalent chromosomal rearrangements along with EVI1 and TLX1 oncogenic expression in the presence of optimized primers. The potential of the MRT-PCR method was approved by evaluating the available cell lines as positive control and confirmed by sequencing. Samples from 53 patients afflicted with hematopoiesis malignancies were analyzed. Results revealed at least one chromosomal rearrangement in 69% of acute myeloid leukemia subjects, 64% of acute lymphoblastic leukemia subjects, and 81% of chronic myeloid leukemia subjects, as well as a subject with hypereosinophilic syndrome. Also, five novel fusion variants were detected. Results of this study also showed that chromosomal rearrangements, both alone and in conjunction with other rearrangements, are involved in leukemogenesis. Moreover, it was found that EVI1 is a suitable hallmark for hematopoietic malignancies.
Annals of Hematology – Springer Journals
Published: Aug 5, 2017
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