Reference Detail

Ref Type

Journal Article

PMID

(17698633)

Authors

Chase A, Grand FH, Cross NC

Title

Activity of TKI258 against primary cells and cell lines with FGFR1 fusion genes associated with the 8p11 myeloproliferative syndrome.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Blood	110	10	2007 Nov 15	3729-34	Blood

URL

Abstract Text

The 8p11 myeloproliferative syndrome (EMS) is an aggressive, atypical stem cell myeloproliferative disorder associated with chromosome translocations that disrupt and constitutively activate FGFR1 by fusion to diverse partner genes. To explore the possibility of targeted therapy for EMS, we have investigated the use of TKI258, a multitargeted receptor tyrosine kinase inhibitor with activity against FGFR, VEGFR, PDGFR, FLT3, and KIT that is currently being assessed for the treatment of a variety of malignancies in phase 1 clinical studies. The viability of Ba/F3 cells transformed to IL3 independence by ZNF198-FGFR1 or BCR-FGFR1 was specifically inhibited by TKI258 with IC(50) values of 150 nM and 90 nM, respectively. Inhibition was accompanied by dose-dependent inhibition of phosphorylation of each fusion gene, ERK, and STAT5. TKI258 also specifically inhibited proliferation and survival of the FGFR1OP2-FGFR1-positive KG1 and KG1A cell lines, resulting in increased levels of apoptosis. Primary cells from EMS patients showed significant, dose-dependent responses in liquid culture and in methylcellulose colony assays compared with controls. This work provides evidence that targeted therapy may be beneficial for patients with EMS.

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Molecular Profile	Treatment Approach

Gene Name	Source	Synonyms	Protein Domains	Gene Description	Gene Role

Therapy Name	Drugs	Efficacy Evidence	Clinical Trials

Drug Name	Trade Name	Synonyms	Drug Classes	Drug Description

Gene	Variant	Impact	Protein Effect	Variant Description	Associated with drug Resistance

Molecular Profile	Indication/Tumor Type	Response Type	Therapy Name	Approval Status	Evidence Type	Efficacy Evidence	References
FGFR1 fusion	Advanced Solid Tumor	sensitive	Dovitinib	Preclinical	Actionable	In a preclinical study, Dovitinib (TKI258) inhibited Erk, Stat5 signaling and survival of transformed cell lines overexpressing FGFR1 fusion proteins (ZMYM2-FGFR1 or BCR-FGFR1) in culture (PMID: 17698633).	17698633
FGFR1 fusion	acute myeloid leukemia	sensitive	Dovitinib	Preclinical	Actionable	In a preclinical study, Dovitinib (TKI258) increased apoptosis and inhibited survival of acute myelogenous leukemia cell lines harboring FGFR1OP2-FGFR1 fusion in culture (PMID: 17698633).	17698633
FGFR1 rearrange	myeloproliferative neoplasm	sensitive	Dovitinib	Preclinical	Actionable	In a preclinical study, primary cells from 8p11 myeloproliferative syndrome patients harboring FGFR1 rearrangement were sensitive to Dovitinib (TKI258)-induced growth inhibition in culture (PMID: 17698633).	17698633