Abstract
Background
We report here a phase 1 study of LY2874455, a potent oral selective pan-fibroblast growth factor receptor (FGFR) inhibitor.
Objective
The primary objective was to determine the recommended phase 2 dosing (RP2D). Secondary objectives included determining toxicity, antitumor activity, pharmacokinetics (PK), and pharmacodynamic (PD) properties of LY2874455.
Patients and Methods
This study comprised two parts: (a) dose escalation with 3 + 3 cohorts in patients with solid tumors and (b) dose-expansion cohorts in patients with gastric cancer (GC) and non-small cell lung cancer (NSCLC). Part A: 36 patients in 11 dose cohorts ranging from 2 to 24 mg twice daily (BID). RP2D was 16 mg BID. Part B: GC cohort, 29 patients, NSCLC cohort, 27 patients, all treated at the RP2D.
Results
LY2874455 was slowly absorbed and generally showed linear PK. The effective half-life was ∼12 h. PD properties of LY2874455 occurred at doses ≥10 mg by increases in serum phosphorus. Phosphate binders were administered to control serum phosphorus. LY2874455 was generally well tolerated; most toxicities were grade 1 or 2; most frequent were hyperphosphatemia, diarrhea, and stomatitis. Efficacy: part A: 24 patients evaluable: 1 patient in the 14-mg BID cohort with GC had a partial response (PR); 14 patients had stable disease (SD); part B: NSCLC cohort: 11 of 12 evaluable patients had SD; GC cohort: 15 patients evaluable: 1 patient with PR; 12 patients with SD.
Conclusions
LY2874455 has an RP2D of 16 mg BID and demonstrated good tolerability and activity in solid-organ cancer patients. The role of FGFR inhibition on tumor growth in patients requires further study. (NCT01212107).
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Funding
This study was funded by Eli Lilly and Company. William Wargin of Nuventra Inc. assisted in pharmacokinetic data analysis, and Nancy Sheridan of INC Research Inc. provided editorial assistance, supported by Eli Lilly and Company.
Conflicts of Interest
Yoon-Koo Kang has received research grants from Daehwa Pharmaceutical Co., LSK BioPharma, Bayer, Novartis, and Roche, and consulting fees or honorarium from Daehwa Pharmaceutical Co., LSK BioPharma, Ono, Taiho, Novartis, and Roche. Yung-Jue Bang has received grants from Eli Lilly and Company for clinical trials (to the institution), and consulting fees or honorarium from Eli Lilly and Company for participating in advisory board meetings. Donald Thornton, Oday Hamid, Eyas Raddad, and Sonya Tate are employees and hold stock/stock options of Eli Lilly and Company. The other authors declare no conflicts of interest.
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Michael, M., Bang, YJ., Park, Y.S. et al. A Phase 1 Study of LY2874455, an Oral Selective pan-FGFR Inhibitor, in Patients with Advanced Cancer. Targ Oncol 12, 463–474 (2017). https://doi.org/10.1007/s11523-017-0502-9
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DOI: https://doi.org/10.1007/s11523-017-0502-9