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|Ref Type||Journal Article|
|Authors||Tanaka H, Sase H, Tsukaguchi T, Hasegawa M, Tanimura H, Yoshida M, Sakata K, Fujii T, Tachibana Y, Takanashi K, Higashida A, Hasegawa K, Ono Y, Oikawa N, Mio T|
|Title||Selective TRK Inhibitor CH7057288 against TRK Fusion-Driven Cancer.|
|Journal||Molecular cancer therapeutics|
|Abstract Text||Members of the tropomyosin receptor kinase (TRK) family are expressed in their constitutively activated forms as a result of a gene fusion that occurs across a wide variety of cancer types. We have identified CH7057288 as a potent and selective TRK inhibitor that belongs to a novel chemical class. CH7057288 showed selective inhibitory activity against TRKA, TRKB, and TRKC in cell-free kinase assays and suppressed proliferation of TRK fusion-positive cell lines, but not that of TRK-negative cell lines. Strong in vivo tumor growth inhibition was observed in subcutaneously implanted xenograft tumor models of TRK fusion-positive cells. Furthermore, in an intracranial implantation model mimicking brain metastasis, CH7057288 significantly induced tumor regression and improved event-free survival. Recently, resistant mutations in the kinase domain of TRK have been reported in patients who show disease progression after treatment with the TRK inhibitors now under clinical development. Our compound maintained similar levels of in vitro and in vivo activity against one of these resistant mutants as it did to wild-type TRK. An X-ray crystal structure of the TRKA and CH7057288 complex supported the activity against the mutant. In addition, gene expression analysis revealed that CH7057288 suppressed MAPK and E2F pathways as downstream signaling of TRK fusion. Therefore, CH7057288 could be a promising therapeutic agent for TRK fusion-positive cancer.|
|Molecular Profile||Treatment Approach|
|Gene Name||Source||Synonyms||Protein Domains||Gene Description||Gene Role|
|Drug Name||Trade Name||Synonyms||Drug Classes||Drug Description|
|CH7057288||Trk Receptor Inhibitor (Pan) 23||CH7057288 selectivity inhibits NTRK1, 2, and 3, resulting in decreased downstream signaling and potentially resulting in reduced growth of tumors harboring NTRK fusions (PMID: 30242093).|
|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|
|ETV6 - NTRK3||acute myeloid leukemia||sensitive||CH7057288||Preclinical - Cell line xenograft||Actionable||In a preclinical study, CH7057288 inhibited NTRK phosphorylation and downstream signaling and reduced growth of acute myeloid leukemia cells harboring ETV6-NTRK3 in culture, and induced tumor regression in xenograft models (PMID: 30242093).||30242093|