Missing content? – Request curation!
Request curation for specific Genes, Variants, or PubMed publications.
Have questions, comments, or suggestions? - Let us know!
Email us at : firstname.lastname@example.org
|Ref Type||Journal Article|
|Authors||Schöffski P, Gebreyohannes Y, Van Looy T, Manley P, Growney JD, Squires M, Wozniak A|
|Title||In Vivo Evaluation of Fibroblast Growth Factor Receptor Inhibition in Mouse Xenograft Models of Gastrointestinal Stromal Tumor.|
|Abstract Text||Advanced gastrointestinal stromal tumors (GIST) are typically treated with tyrosine kinase inhibitors, and imatinib is the most commonly used standard of care in first line treatments. The use of this and other tyrosine kinase inhibitors is associated with objective tumor responses and prolongation of progression-free and overall survival, but the treatment of metastatic disease is non-curative due to the selection or acquisition of secondary mutations and the activation of alternative kinase signaling pathways, leading to resistance and disease progression after an initial response. The present preclinical study evaluated the potential use of the fibroblast growth factor receptor inhibitors infigratinib and dovitinib alone or in combination with the mitogen-activated protein kinase inhibitor binimetinib in mouse models of GIST with different sensitivity or resistance to imatinib. Patient- and cell-line-derived GIST xenografts were established by bilateral, subcutaneous transplantation of human GIST tissue in female adult nu/nu NMRI mice. The mice were treated with dovitinib, infigratinib, or binimetinib, either alone or in combination with imatinib. The safety of treated animals was assessed by well-being inspection and body weight measurement. Antitumor effects were assessed by caliper-based tumor measurement. H&E staining and immunohistochemistry were used for assessing anti-mitotic and pro-apoptotic activity of the experimental treatments. Western blotting was used for assessing effects of the agents on kinase signaling pathways. Anti-angiogenic activity was assessed by measuring tumor vessel density. Dovitinib was found to have antitumor efficacy in GIST xenografts characterized by different imatinib resistance patterns. Dovitinib had better efficacy than imatinib (both at standard and increased dose) and was found to be well tolerated. Dovitinib had better efficacy in a KIT exon 9 mutant model, highlighting a role of patient selection in clinical GIST trials with the agent. In a model with KIT exon 11 and 17 mutations, dovitinib induced tumor necrosis, most likely due to anti-angiogenic effects. Additive effects combining dovitinib with binimetinib were limited.|
|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|
|KIT V560D KIT D820A||gastrointestinal stromal tumor||predicted - sensitive||Imatinib + Infigratinib||Preclinical - Cell line xenograft||Actionable||In a preclinical study, combination treatment with Gleevec (imatinib) and Truseltiq (infigratinib) treatment resulted in tumor shrinkage in a gastrointestinal stromal tumor cell line xenograft model harboring KIT V560D and KIT D820A (PMID: 35625872).||35625872|
|KIT A502_Y503dup||gastrointestinal stromal tumor||conflicting||Imatinib||Preclinical - Pdx||Actionable||In a preclinical study, Gleevec (imatinib) treatment stabilized tumor growth in a gastrointestinal stromal tumor patient-derived xenograft (PDX) model harboring KIT A502_Y503dup (PMID: 35625872).||35625872|
|KIT W557Lfs*5 KIT P577del KIT D820G||gastrointestinal stromal tumor||predicted - sensitive||Dovitinib||Preclinical - Pdx||Actionable||In preclinical study, Dovitinib (TKI258) treatment stabilized tumor volume in a patient-derived xenograft (PDX) model of gastrointestinal stromal tumor harboring KIT P577del, KIT W557Lfs*5, and KIT D820G (PMID: 35625872).||35625872|
|KIT A502_Y503dup||gastrointestinal stromal tumor||predicted - sensitive||Binimetinib + Dovitinib||Preclinical - Pdx||Actionable||In preclinical study, combination treatment with Mektovi (binimetinib) and Dovitinib (TKI258) resulted in tumor shrinkage in a patient-derived xenograft (PDX) model of gastrointestinal stromal tumor harboring KIT A502_Y503dup (PMID: 35625872).||35625872|
|KIT A502_Y503dup||gastrointestinal stromal tumor||predicted - sensitive||Dovitinib||Preclinical - Pdx||Actionable||In preclinical study, Dovitinib (TKI258) treatment resulted in tumor shrinkage in a patient-derived xenograft (PDX) model of gastrointestinal stromal tumor harboring KIT A502_Y503dup (PMID: 35625872).||35625872|