Abstract
ETV6::Fyn-related kinase (FRK), which is a Src family tyrosine-kinase-related fusion gene and firstly identified in our patient with paediatric high risk B cell precursor acute lymphoblastic leukaemia (B-ALL), has no evidence of efficacy of tyrosine kinase inhibitor in vivo. We performed functional analysis of ETV6::FRK to establish molecular targeting therapy and determined that dasatinib could abrogate proliferation activity of ETV6::FRK through the repression of FRK-STAT3/STAT5 pathway in vitro and significantly extended the survival time of the xenografted mice in vivo (p<0.01). Our data support the potential of dasatinib as a therapeutic option for patients with B-ALL harboring FRK rearrangements.
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