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Ref Type Journal Article
PMID (38354330)
Authors Calfa CJ, Rothe M, Mangat PK, Garrett-Mayer E, Ahn ER, Burness ML, Gogineni K, Rohatgi N, Al Baghdadi T, Conlin A, Gaba A, Hamid O, Krishnamurthy J, Gavini NJ, Gold PJ, Rodon J, Rueter J, Thota R, Grantham GN, Hinshaw DC, Gregory A, Halabi S, Schilsky RL
Title Sunitinib in Patients With Breast Cancer With FGFR1 or FGFR2 Amplifications or Mutations: Results From the Targeted Agent and Profiling Utilization Registry Study.
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Abstract Text The Targeted Agent and Profiling Utilization Registry Study is a phase II basket trial evaluating the antitumor activity of commercially available targeted agents in patients with advanced cancer and genomic alterations known to be drug targets. Results from cohorts of patients with metastatic breast cancer (BC) with FGFR1 and FGFR2 alterations treated with sunitinib are reported.Eligible patients had measurable disease, Eastern Cooperative Oncology Group performance status 0-2, adequate organ function, and no standard treatment options. Simon's two-stage design was used with a primary end point of disease control (DC), defined as objective response (OR) or stable disease of at least 16 weeks duration (SD16+) according to RECIST v1.1. Secondary end points included OR, progression-free survival, overall survival, duration of response, duration of stable disease, and safety.Forty patients with BC with FGFR1 (N = 30; amplification only n = 26, mutation only n = 1, both n = 3) or FGFR2 (N = 10; amplification only n = 2, mutation only n = 6, both n = 2) alterations were enrolled. Three patients in the FGFR1 cohort were not evaluable for efficacy; all patients in the FGFR2 cohort were evaluable. For the FGFR1 cohort, two patients with partial response and four with SD16+ were observed for DC and OR rates of 27% (90% CI, 13 to 100) and 7% (95% CI, 1 to 24), respectively. The null hypothesis of 15% DC rate was not rejected (P = .169). No patients achieved DC in the FGFR2 cohort (P = 1.00). Thirteen of the 40 total patients across both cohorts had at least one grade 3-4 adverse event or serious adverse event at least possibly related to sunitinib.Sunitinib did not meet prespecified criteria to declare a signal of antitumor activity in patients with BC with either FGFR1 or FGFR2 alterations. Other treatments and clinical trials should be considered for these patient populations.

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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 amp breast cancer no benefit Sunitinib Phase II Actionable In a Phase II trial (TAPUR), Sutent (sunitinib) treatment did not meet the predetermined efficacy criteria in metastatic breast cancer patients with FGFR1 amplification (n=26), FGFR1 mutation (n=1), or both (n=3), resulting in disease control in 6 of 27 patients, with 2 partial responses and stable disease of at least 16 weeks in 4 patients, an objective response rate of 7% (2/27), median progression-free survival of 9 weeks, and a median overall survival of 34 weeks (PMID: 38354330; NCT02693535). 38354330
FGFR2 amp breast cancer no benefit Sunitinib Case Reports/Case Series Actionable In a Phase II trial (TAPUR), Sutent (sunitinib) treatment did not meet the predetermined efficacy criteria in metastatic breast cancer patients with FGFR2 amplification (n=2), FGFR2 mutation (including FGFR2 rearrangement) (n=6), or both (n=2), resulting in no objective responses or stable disease of at least 16 weeks, median progression-free survival of 8 weeks, and a median overall survival of 22 weeks (PMID: 38354330; NCT02693535). 38354330
FGFR2 mutant breast cancer no benefit Sunitinib Case Reports/Case Series Actionable In a Phase II trial (TAPUR), Sutent (sunitinib) treatment did not meet the predetermined efficacy criteria in metastatic breast cancer patients with FGFR2 amplification (n=2), FGFR2 mutation (including FGFR2 rearrangement) (n=6), or both (n=2), resulting in no objective responses or stable disease of at least 16 weeks, median progression-free survival of 8 weeks, and a median overall survival of 22 weeks (PMID: 38354330; NCT02693535). 38354330
FGFR2 rearrange breast cancer no benefit Sunitinib Case Reports/Case Series Actionable In a Phase II trial (TAPUR), Sutent (sunitinib) treatment did not meet the predetermined efficacy criteria in metastatic breast cancer patients with FGFR2 amplification (n=2), FGFR2 mutation (including FGFR2 rearrangement) (n=6), or both (n=2), resulting in no objective responses or stable disease of at least 16 weeks, median progression-free survival of 8 weeks, and a median overall survival of 22 weeks (PMID: 38354330; NCT02693535). 38354330