Reference Detail

Ref Type

PMID

Authors

C. Morizane, T. Kojima, Y. Kuboki, H. Bando, N. Matsubara, K. Shitara, K. Yoh, H. Hirai, T. Kato, T. Doi

Title

Phase I study of the irreversible FGFR inhibitor (i) futibatinib (FBN; TAS-120) in Japanese patients (pts) with advanced (adv) solid tumours

Journal	Vol	Issue	Date	Pages	Journal Short Title
Annals of Oncology	31	suppl_4

URL

https://www.sciencedirect.com/science/article/pii/S0923753420406544

Abstract Text

Background: The FGFRi FBN showed tolerability and preliminary efficacy in a phase I dose-escalation (DE)/expansion (EX) study conducted in primarily Caucasian pts with adv solid tumours (NCT02052778), and 20 mg once-daily (QD) FBN was established as the recommended phase II dose (RP2D). Here, we report results from a Japanese phase I DE/EX study of FBN in adv solid tumours. Methods: In DE, pts received 8–160 mg FBN thrice weekly (TIW; accelerated titration or standard 3+3 design), or 16 and 20 mg QD. The primary objective was safety and maximum tolerated dose (MTD) evaluation; secondary were pharmacokinetics (PK) and preliminary efficacy. The EX phase included pts with FGF/FGFR abnormalities receiving FBN at doses < MTD. Results: Sixty-three pts were enrolled in 8 TIW (DE; 29 pts, EX; 11 pts) and 2 QD cohorts (DE; 10 pts, EX; 13 pts). Pts had colorectal (16%), esophageal (13%), gastric (13%), or biliary tract cancer (11%), and 52% had tumors with FGF/FGFR aberrations. No DLTs were observed in the study; MTD was not reached with TIW dosing. QD enrollment was based on prior phase I data and 20 mg QD was determined as the RP2D. Overall, 5% of pts experienced grade (gr) ≥3 treatment-related adverse events (TRAEs). Most common TRAEs (all gr; gr ≥3) were hyperphosphatemia (89%; 0), decreased appetite (22%; 0), nausea (19%; 0), stomatitis (14%; 2%), retinal detachment (13%; 0), and elevated AST (11%; 3%). TRAEs led to dose reductions, interruptions, and discontinuation in 24%, 48%, and 0% of pts, respectively. The PK profile of 20 mg QD FBN (mean Cmax, 253 ng/mL; AUC0-last, 977ng·h/mL; median Tmax, 2.00 h; apparent T1/2, 2.18 h) was similar to that observed in Caucasian pts. Efficacy assessment is ongoing; at data cutoff (July 4, 2019), partial responses were observed in pts with gastric (n=2; tumor shrinkages of 59% and 70%) and breast cancer (n=1; tumor shrinkage, 37%) harboring FGFR2 amplifications. Conclusions: FBN showed manageable safety and preliminary efficacy in Japanese pts with adv solid tumors; RP2D (20 mg QD) in this study was consistent with prior results. Phase 2/3 studies in cholangiocarcinoma (NCT02052778; NCT04093362), gastric (NCT04189445) and breast tumours (NCT04024436) are ongoing. Clinical trial identification: JapicCTI-142552.

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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
FGFR2 amp	stomach cancer	predicted - sensitive	Futibatinib	Case Reports/Case Series	Actionable	In a Phase I trial, Lytgobi (futibatinib) treatment resulted in a partial response in 2 patients with gastric cancer harboring FGFR2 amplification, with 59% and 90% tumor shrinkage, respectively (Annals of Oncology (2020) 31 (suppl_4): S475).	detail...
FGFR2 amp	breast cancer	sensitive	Futibatinib	Case Reports/Case Series	Actionable	In a Phase I trial, Lytgobi (futibatinib) treatment resulted in a partial response in a patient with breast cancer harboring FGFR2 amplification, with 37% tumor shrinkage (Annals of Oncology (2020) 31 (suppl_4): S475).	detail...