FLT3 internal tandem duplication and D835 mutations in patients with acute lymphoblastic leukemia and its clinical significance

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Abstract

The fms-like tyrosine kinase 3 (FLT3) gene is a member of the class III receptor tyrosine kinase family. Mutations of FLT3 were first described in 1997and account for the most frequent molecular mutations in acute myeloid leukemia. Currently, there is no published data on FLT3 mutations in Saudi acute lymphoblastic leukemia (ALL) patients. In this retrospective study, we have examined a cohort of 77 ALL patients to determine the prevalence of FLT3 mutations and the possible prognostic relevance of these mutations in ALL patients. Correlations to other biologic factors such as karyotype, molecular mutations, and leukocyte count were also considered. FLT3 internal tandem duplication (ITD) mutations and point mutation in tyrosine kinase domain (D835) were analyzed in ALL patients, at diagnosis, by polymerase chain reaction (PCR). Two cases (2.6%, 2/77) were positive for FLT3 mutations; one was found to have FLT3/ITD and the other FLT3/D835. Our findings suggest that FLT3 mutations are not common in Saudi ALL and do not affect clinical outcome.

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Elyamany, G., Awad, M., Alsuhaibani, O., Fadalla, K., Sharif, O. A., Shahrani, M. A., … Al-Abulaaly, A. (2014). FLT3 internal tandem duplication and D835 mutations in patients with acute lymphoblastic leukemia and its clinical significance. Mediterranean Journal of Hematology and Infectious Diseases, 6(1). https://doi.org/10.4084/MJHID.2014.038

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