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FLT3 mutations in childhood acute lymphoblastic leukemia.
Umeå University, Faculty of Medicine, Department of Medical Biosciences, Clinical chemistry.
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2004 (English)In: Blood, ISSN 0006-4971, E-ISSN 1528-0020, Vol. 103, no 9, 3544-3546 p.Article in journal (Refereed) Published
Abstract [en]

Activating mutations of the FLT3 receptor tyrosine kinase are common in acute myelogenous leukemia (AML) but are rare in adult acute lymphoblastic leukemia (ALL). We have recently shown that FLT3 is highly expressed and often mutated in ALLs with rearrangement of the mixed lineage leukemia (MLL) gene on chromosome 11q23. Because hyperdiploid ALL samples also show high-level expression of FLT3, we searched for the presence of FLT3 mutations in leukemic blasts from 71 patients with ALL. The data show that approximately 25% (6 of 25) of hyperdiploid ALL samples possess FLT3 mutations, whereas only 1 of 29 TEL/AML1-rearranged samples harbored mutations (P =.04, Fisher exact test). Three mutations are novel in-frame deletions within a 7-amino acid region of the receptor juxtamembrane domain. Finally, 3 samples from patients whose disease would relapse harbored FLT3 mutations. These data suggest that patients with hyperdiploid or relapsed ALL might be considered candidates for therapy with newly described small-molecule FLT3 inhibitors.

Place, publisher, year, edition, pages
2004. Vol. 103, no 9, 3544-3546 p.
Identifiers
URN: urn:nbn:se:umu:diva-23194DOI: 10.1182/blood-2003-07-2441PubMedID: 14670924OAI: oai:DiVA.org:umu-23194DiVA: diva2:221277
Available from: 2009-06-03 Created: 2009-06-03 Last updated: 2017-12-13

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