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Ref Type | Journal Article | ||||||||||||
PMID | (37956738) | ||||||||||||
Authors | Necchi A, Pouessel D, Leibowitz R, Gupta S, Fléchon A, García-Donas J, Bilen MA, Debruyne PR, Milowsky MI, Friedlander T, Maio M, Gilmartin A, Li X, Veronese ML, Loriot Y | ||||||||||||
Title | Pemigatinib for Metastatic or Surgically Unresectable Urothelial Carcinoma With FGF/FGFR Genomic Alterations: Final Results From FIGHT-201. | ||||||||||||
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Abstract Text | Fibroblast growth factor receptor 3 (FGFR3) alterations are oncogenic drivers of urothelial carcinoma (UC). Pemigatinib is a selective, oral inhibitor of FGFR1-3 with antitumor activity. We report the efficacy and safety of pemigatinib in the open-label, single-arm phase 2 study of previously treated, unresectable or metastatic UC with FGFR3 alterations (FIGHT-201; NCT02872714).Patients ≥18 years old with FGFR3 mutations or fusions/rearrangements (cohort A) and other FGF/FGFR alterations (cohort B) were included. Patients received pemigatinib 13.5 mg once daily continuously (CD) or intermittently (ID) until disease progression or unacceptable toxicity. The primary endpoint was centrally confirmed objective response rate (ORR) per RECIST v1.1 in cohort A-CD. Secondary endpoints included ORR in cohorts A-ID and B, duration of response (DOR), progression-free survival (PFS), overall survival (OS), and safety.Overall, 260 patients were enrolled and treated (A-CD, n=101; A-ID, n=103; B, n=44; unconfirmed FGF/FGFR status, n=12). All discontinued treatment, most commonly due to progressive disease (68.5%). ORR (95% CI) in cohorts A-CD and A-ID was 17.8% (10.9%, 26.7%) and 23.3% (15.5%, 32.7%), respectively. Among patients with the most common FGFR3 mutation (S249C; n=107), ORR was similar between cohorts (A-CD, 23.9%; A-ID, 24.6%). In cohorts A-CD/A-ID, median (95% CI) DOR was 6.2 (4.1, 8.3)/6.2 (4.6, 8.0) months, PFS was 4.0 (3.5, 4.2)/4.3 (3.9, 6.1) months, and OS was 6.8 (5.3, 9.1)/8.9 (7.5, 15.2) months. Pemigatinib had limited clinical activity among patients in cohort B. Of 36 patients with samples available at progression, 6 patients had 8 acquired FGFR3 secondary resistance mutations (V555M/L, n=3; V553M, n=1; N540K/S, n=2; M528I, n=2). The most common treatment-emergent adverse events overall were diarrhea (44.6%) and alopecia, stomatitis, and hyperphosphatemia (42.7% each).Pemigatinib was generally well tolerated and demonstrated clinical activity in previously treated, unresectable or metastatic UC with FGFR3 mutations or fusions/rearrangements. |
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Gene | Variant | Impact | Protein Effect | Variant Description | Associated with drug Resistance |
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Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
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FGFR3 S249C FGFR3 M528I FGFR3 V553M | transitional cell carcinoma | predicted - resistant | Pemigatinib | Case Reports/Case Series | Actionable | In a Phase II trial (FIGHT-201), FGFR3 V553M and M528I were identified in post-progression biopsy in a patient with urothelial carcinoma harboring FGFR3 S249C who previously achieved a partial response on Pemazyre (pemigatinib) treatment (PMID: 37956738; NCT02872714). | 37956738 |
FGFR3 S249C FGFR3 N540S | transitional cell carcinoma | predicted - resistant | Pemigatinib | Case Reports/Case Series | Actionable | In a Phase II trial (FIGHT-201), FGFR3 N540S was identified in post-progression biopsy in a patient with urothelial carcinoma harboring FGFR3 S249C who previously achieved stable disease on Pemazyre (pemigatinib) treatment (PMID: 37956738; NCT02872714). | 37956738 |
FGFR3 act mut | transitional cell carcinoma | sensitive | Pemigatinib | Phase II | Actionable | In a Phase II trial (FIGHT-201), Pemazyre (pemigatinib) treatment resulted in an objective response rate (ORR) of 17.8%, median duration of response (mDOR) of 6.2 mo, median progression-free survival (mPFS) of 4.0 mo, and median overall survival (mOS) of 6.8 mo with continuous dosing, and an ORR of 23.3%, mDOR of 6.2 mo, mPFS of 4.3 mo, and mOS of 8.9 mo with intermittent dosing in patients with urothelial carcinoma harboring FGFR3 mutations or fusions/rearrangements (PMID: 37956738; NCT02872714). | 37956738 |
FGFR3 Y373C FGFR3 N540K | transitional cell carcinoma | predicted - resistant | Pemigatinib | Case Reports/Case Series | Actionable | In a Phase II trial (FIGHT-201), FGFR3 N540K was identified in post-progression biopsy in a patient with urothelial carcinoma harboring FGFR3 Y373C who previously achieved stable disease on Pemazyre (pemigatinib) treatment (PMID: 37956738; NCT02872714). | 37956738 |
FGFR3 S249C FGFR3 V555L | transitional cell carcinoma | predicted - resistant | Pemigatinib | Case Reports/Case Series | Actionable | In a Phase II trial (FIGHT-201), FGFR3 V555L was identified in post-progression biopsy in a patient with urothelial carcinoma harboring FGFR3 S249C who previously achieved stable disease on Pemazyre (pemigatinib) treatment (PMID: 37956738; NCT02872714). | 37956738 |
FGFR3 S249C FGFR3 V553M FGFR3 V555L | transitional cell carcinoma | predicted - resistant | Pemigatinib | Case Reports/Case Series | Actionable | In a Phase II trial (FIGHT-201), FGFR3 V553M and V555L were identified in post-progression biopsy in a patient with urothelial carcinoma harboring FGFR3 S249C who previously achieved a partial response on Pemazyre (pemigatinib) treatment (PMID: 37956738; NCT02872714). | 37956738 |
FGFR3 S249C | transitional cell carcinoma | predicted - sensitive | Pemigatinib | Phase II | Actionable | In a Phase II trial (FIGHT-201), Pemazyre (pemigatinib) treatment resulted in an objective response rate (ORR) of 17.9% with continuous dosing and 24.2% with intermittent dosing in patients with urothelial carcinoma harboring FGFR3 mutations, with an ORR in patients harboring FGFR3 S249C of 23.9% with continuous dosing (n=46) and 24.6% with intermittent dosing (n=61) (PMID: 37956738; NCT02872714). | 37956738 |
FGFR3 fusion | transitional cell carcinoma | sensitive | Pemigatinib | Phase II | Actionable | In a Phase II trial (FIGHT-201), Pemazyre (pemigatinib) treatment resulted in an objective response rate (ORR) of 17.8%, median duration of response (mDOR) of 6.2 mo, median progression-free survival (mPFS) of 4.0 mo, and median overall survival (mOS) of 6.8 mo with continuous dosing, and an ORR of 23.3%, mDOR of 6.2 mo, mPFS of 4.3 mo, and mOS of 8.9 mo with intermittent dosing in patients with urothelial carcinoma harboring FGFR3 mutations or fusions/rearrangements (PMID: 37956738; NCT02872714). | 37956738 |