Molecular Profile Detail

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Profile Name FGFR1 K656E
Gene Variant Detail

FGFR1 K656E (gain of function)

Relevant Treatment Approaches FGFR Inhibitor (Pan) FGFR1 Inhibitor

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Molecular Profile Indication/Tumor Type Response Type Relevant Treatment Approaches Therapy Name Approval Status Evidence Type Efficacy Evidence References
FGFR1 K656E Advanced Solid Tumor predicted - resistant FGFR Inhibitor (Pan) Dovitinib Preclinical - Cell culture Actionable In a preclinical study, cells expressing FGFR1 K656E were resistant to treatment with Dovitinib (TKI258) in culture (PMID: 34272467). 34272467
FGFR1 K656E Advanced Solid Tumor conflicting FGFR1 Inhibitor Pemigatinib Preclinical - Cell culture Actionable In a preclinical study, cells expressing FGFR1 K656E were sensitive to treatment with Pemazyre (pemigatinib) in culture, demonstrating reduced cell viability (PMID: 34272467). 34272467
FGFR1 K656E Advanced Solid Tumor conflicting FGFR Inhibitor (Pan) Erdafitinib Preclinical - Cell culture Actionable In a preclinical study, cells expressing FGFR1 K656E were sensitive to treatment with Balversa (erdafitinib) in culture, demonstrating reduced cell viability (PMID: 34272467). 34272467
FGFR1 K656E Advanced Solid Tumor conflicting FGFR Inhibitor (Pan) Infigratinib Preclinical - Cell culture Actionable In a preclinical study, cells expressing FGFR1 K656E were sensitive to treatment with Truseltiq (infigratinib) in culture, demonstrating reduced cell viability (PMID: 34272467). 34272467
FGFR1 K656E Advanced Solid Tumor predicted - sensitive FGFR1 Inhibitor HQP1351 Preclinical - Cell culture Actionable In a preclinical study, GZD824 (HQP1351) inhibited growth of a cell line expressing FGFR1 K656E in culture (PMID: 34114373). 34114373
FGFR1 K656E Advanced Solid Tumor predicted - sensitive FGFR Inhibitor (Pan) Futibatinib Preclinical - Cell culture Actionable In a preclinical study, Lytgobi (futibatinib) inhibited growth of a cell line expressing FGFR1 K656E in culture (PMID: 34114373). 34114373
FGFR1 K656E Advanced Solid Tumor conflicting FGFR Inhibitor (Pan) Erdafitinib Preclinical - Cell culture Actionable In a preclinical study, cells expressing FGFR1 K656E demonstrated insensitivity to Balversa (erdafitinib) in culture (PMID: 34114373). 34114373
FGFR1 K656E Advanced Solid Tumor conflicting FGFR1 Inhibitor Pemigatinib Preclinical - Cell culture Actionable In a preclinical study, cells expressing FGFR1 K656E demonstrated insensitivity to Pemazyre (pemigatinib) in culture (PMID: 34114373). 34114373
FGFR1 K656E Advanced Solid Tumor conflicting FGFR Inhibitor (Pan) Infigratinib Preclinical - Cell culture Actionable In a preclinical study, cells expressing FGFR1 K656E demonstrated insensitivity to Truseltiq (infigratinib) in culture (PMID: 34114373). 34114373
FGFR1 K656E high grade glioma predicted - sensitive FGFR Inhibitor (Pan) Infigratinib Case Reports/Case Series Actionable In a Phase II trial, Truseltiq (infigratinib) treatment resulted in limited efficacy with a 6-month progression-free survival (PFS) rate of 16.0%, a median PFS of 1.7 months, an objective response rate of 4.8% (1/21), and median overall survival of 6.7 months in patients with recurrent glioma harboring alterations in FGFR1 or FGFR3; however, resulted in a partial response with PFS of 21.9 months and stable disease with PFS of 13.2 months in two patients harboring FGFR1 K656E (PMID: 35344029; NCT01975701). 35344029
FGFR1 K656E diffuse astrocytoma predicted - sensitive FGFR1 Inhibitor Pemigatinib Case Reports/Case Series Actionable In a Phase II trial (FIGHT-207), Pemazyre (pemigatinib) treatment resulted in a partial response with an 80.7% decrease in target lesion and a progression-free survival of 8 months in a patient with diffuse astrocytoma harboring FGFR1 K656E (Cancer Res (2023) 83 (8_Supplement): CT016; NCT03822117). detail...
FGFR1 K656E low grade glioma predicted - sensitive FGFR Inhibitor (Pan) Erdafitinib Case Reports/Case Series Actionable In a Phase II trial (RAGNAR), treatment with Balversa (erdafitinib) resulted in a complete response with a duration of response of 21.68 months in a patient with low grade glioma harboring FGFR1 K656E (PMID: 37541273; NCT04083976). 37541273