Safety and efficacy of AMG 655 plus modified FOLFOX6 (mFOLFOX6) and bevacizumab (B) for the first-line treatment of patients (pts) with metastatic colorectal cancer (mCRC)
2009; Lippincott Williams & Wilkins; Volume: 27; Issue: 15_suppl Linguagem: Inglês
10.1200/jco.2009.27.15_suppl.4079
ISSN1527-7755
AutoresLeonard B. Saltz, Jon Infante, Lee S. Schwartzberg, John Stephenson, Caio Rocha‐Lima, Francesco Galimi, Kerry Dillingham, Meier Hsu, Jeffrey S. Wiezorek, Charles S. Fuchs,
Tópico(s)HER2/EGFR in Cancer Research
Resumo4079 Background: AMG 655 is an investigational fully human monoclonal antibody (IgG1) agonist of human death receptor 5 (DR5). AMG 655 activates caspases and induces apoptosis in sensitive tumor cells. The primary objective of this phase 1b study was to determine the maximum tolerated dose (up to a target dose of 10 mg/kg IV every 2 weeks) of AMG 655 that can be safely administered in combination with mFOLFOX6-B to mCRC pts. Methods: Eligible pts were ≥ 18 years old with previously untreated mCRC, ECOG PS of 0 or 1, and adequate hematologic, hepatic, and renal function. Pts were enrolled into sequential cohorts of 3- or 10-mg/kg AMG 655 + mFOLFOX6-B administered on day 1 of each 14-day cycle. Study endpoints included incidence of dose-limiting toxicities (DLT), adverse events (AE), pharmacokinetic (PK) parameters of AMG 655, and objective response rate (by modified RECIST). Results: As of 09/08, 12 pts (6 per cohort) were enrolled and received ≥ 1 cycle of treatment; 8 were female. Median (range) age was 54 (37–75), median (range) time on AMG 655 treatment was 6.9 (1.6 to 11.4+) months; 8 pts continue on study treatment. There were no DLTs in the first 28 days of treatment. Eight pts had grade 3–4 AE; the most common were diarrhea, febrile neutropenia, peripheral neuropathy, neutropenia, DVT, and pulmonary embolism (2 pts each). Post baseline laboratory parameters grade ≥ 3: no ALT and AST; 1 grade 3 bilirubin (due to disease progression), and 3 grade 3 lipase (asymptomatic). No anti-AMG 655 antibodies were detected. AMG 655 PK values (C max , C min ) were similar to those observed with single-agent AMG 655 (LoRusso JCO 2007; 25: abstract 3534). AMG 655 did not appear to affect PK of oxaliplatin or bevacizumab. Best overall tumor response: 5 partial responses (2 unconfirmed, both underwent resection); 6 stable disease; 1 pt had non-measurable disease at baseline. Time to disease progression (3 patients): 8, 42, and 44 weeks. Conclusions: The addition of AMG 655 does not appear to substantially alter the safety profile of mFOLFOX6-B. The randomized phase 2 part of the trial (mFOLFOX6-B ± AMG 655) is in progress. [Table: see text]
Referência(s)