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© Research
Publication : Leukemia

Receptor kinase profiles identify a rationale for multitarget kinase inhibition in immature T-ALL

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Leukemia - 03 Jul 2012

Lhermitte L, Ben Abdelali R, Villarèse P, Bedjaoui N, Guillemot V, Trinquand A, Libura M, Bedin AS, Petit A, Dombret H, Leverger G, Ifrah N, Hermine O, Macintyre E, Asnafi V

Link to Pubmed [PMID] – 22751451

Leukemia 2013 Feb;27(2):305-14

Constitutively activated FLT3 signaling is common in acute myeloid leukemia, and is currently under evaluation for targeted therapy, whereas little data is available in T-cell acute lymphoblastic leukemia (T-ALL). We analyzed 357 T-ALL cases for FLT3 mutations and transcript expression. FLT3 mutations (3% overall) and overexpression (FLT3 high expresser (FLT3(High))) were restricted to immature/TCRγδ T-ALLs. In vitro FLT3 inhibition induced apoptosis in only 30% of FLT3(High) T-ALLs and did not correlate with mutational status. In order to investigate the mechanisms of primary resistance to FLT3 inhibition, a broad quantitative screen for receptor kinome transcript deregulation was performed by Taqman Low Density Array. FLT3 deregulation was associated with overexpression of a network of receptor kinases (RKs), potentially responsible for redundancies and sporadic response to specific FLT3 inhibition. In keeping with this resistance to FLT3 inhibition could be reversed by dual inhibition of FLT3 and KIT with a synergistic effect. We conclude that immature T-ALL may benefit from multitargeted RK inhibition and that exploration of the receptor kinome defines a rational strategy for testing multitarget kinase inhibition in malignant diseases.

https://www.ncbi.nlm.nih.gov/pubmed/22751451