Efficacy and safety of PF299804 versus erlotinib (E): A global, randomized phase II trial in patients (pts) with advanced non-small cell lung cancer (NSCLC) after failure of chemotherapy (CT).

2010 ◽  
Vol 28 (18_suppl) ◽  
pp. LBA7523-LBA7523 ◽  
Author(s):  
M. J. Boyer ◽  
F. H. Blackhall ◽  
K. Park ◽  
C. H. Barrios ◽  
M. J. Krzakowski ◽  
...  

LBA7523 Background: PF299804, a potent, irreversible inhibitor of human epidermal growth factor receptor (HER)-1/EGFR, -2, and -4 tyrosine kinases (TK), is active in E-sensitive and -resistant preclinical models. PF299804 had clinical activity in phase I/II trials in EGFR TK inhibitor (TKI)-refractory NSCLC; a phase III trial is ongoing (BR26). The current trial compared efficacy and safety of PF299804 vs.E in pts with NSCLC after CT failure. Methods: Eligible pts (any histology, ECOG performance status [PS] 0–2, 1/2 CT regimen failures, no prior E, available tumor tissue) were randomized 1:1 to oral PF299804 45 mg or E 150 mg once daily and treated until progression/toxicity. Endpoints included progression-free survival (PFS; primary), overall survival (OS), objective response rate (ORR), safety, and KRAS/EGFR mutation (mu) status. Results: 188 pts (median age 60 years, 87% PS 0/1, 41% female, 65% adenocarcinoma (adeno), 25% East Asian, 21% non-smoker, 16% EGFR mu, 16% KRAS mu) were randomized. Baseline characteristics were balanced between arms except for PS 2 ( PF299804 , 20; E, 3 pts). Mu status determination rates were high (KRAS, 81%; EGFR, 77%). Median follow-up was 12 weeks. PF299804 showed significantly longer PFS vs. E in the overall population (p=0.017), with benefit consistent across several subgroups (SG) including EGFR wild type (wt). ORR favored PF299804 (17% vs. 4%; p=0.008). Frequent treatment-related adverse events (TRAEs) for PF299804 vs. E (grade, any/3 or 4): diarrhea (71%/11% v 48%/3%), acne (53%/7% vs. 34%/5%), and rash (26%/4% vs. 37%/2%). Eight pts discontinued due to TRAEs: PF299804 , 6; E, 2 pts. Conclusions: PF299804 showed significant improvement in PFS (primary endpoint) vs. E in all enrolled pts with NSCLC. Common EGFR TKI AEs were more frequent with PF299804. [Table: see text] [Table: see text]

2013 ◽  
Vol 31 (15_suppl) ◽  
pp. 4506-4506 ◽  
Author(s):  
Tim Eisen ◽  
Yaroslav Shparyk ◽  
Robert Jones ◽  
Nicholas James MacLeod ◽  
Graham Temple ◽  
...  

4506 Background: Sunitinib (S) is established as a standard first-line therapy for patients (pts) with advanced RCC. However, treatment can be limited by the occurrence of drug-related adverse events (AEs). This Phase II study assessed the efficacy and safety of nintedanib (N) – a potent, triple angiokinase inhibitor of VEGFR-1–3, PDGFR-α/β, and FGFR-1–3, as well as RET and Flt3 – vs S in previously untreated pts with RCC. Methods: Ninety-nine eligible pts (96 of whom were treated) with advanced, unresectable/recurrent clear cell RCC, an ECOG performance status of 0–1, and no prior systemic therapy were randomized 2:1 to receive N 200 mg twice daily (n=64; given in 4-week cycles) or S 50 mg once daily (n=32; 4 weeks on, 2 weeks off schedule). Treatment continued until disease progression or unacceptable drug-related AEs. Primary endpoints were progression-free survival at 9 months (PFS-9) and, in N-treated pts only, QTc interval change (baseline to day 15). Secondary endpoints included PFS, objective response rate (ORR; RECIST 1.1), overall survival (OS), time to progression (TTP), time to treatment failure (TTF), and AEs. Results: Baseline characteristics were balanced between the arms. PFS-9 was not statistically significantly different between N- and S-treated pts (43 vs 45%; p=0.85). There were also no statistically significant differences between N and S with regard to PFS (median: 8.44 vs 8.38 mo; hazard ratio: 1.16; 95% CI: 0.71–1.89; p=0.56), confirmed ORR (18.8 vs 31.3%; p=0.19), OS (median: 20.37 vs 21.22 mo; p=0.63), TTP (median: 8.48 vs 8.54 mo; p=0.52), and TTF (median: 8.41 vs 8.36 mo; p=0.46). Grade ≥3 AEs occurred in 47% of N-treated pts and 56% of S-treated pts. Common AEs (all grades; N vs S) included diarrhea (61 vs 50%), nausea (38 vs 34%), fatigue (both 25%), and vomiting (16 vs 22%). Dermatologic AEs (8 vs 47%) were less frequent with N than S. There was no increase from baseline in QTc >60 ms on days 1 or 15 in N-treated pts, and there was no relationship between N exposure and QT interval change. Conclusions: N demonstrated similar efficacy to S and had a manageable safety profile, including a lower incidence of dermatologic AEs vs S. In addition, N was not associated with QT prolongation. Clinical trial information: NCT01024920.


2020 ◽  
Vol 38 (15_suppl) ◽  
pp. 9504-9504 ◽  
Author(s):  
Egbert F. Smit ◽  
Kazuhiko Nakagawa ◽  
Misako Nagasaka ◽  
Enriqueta Felip ◽  
Yasushi Goto ◽  
...  

9504 Background: T-DXd is an antibody-drug conjugate composed of an anti-HER2 antibody, cleavable tetrapeptide-based linker, and topoisomerase I inhibitor payload. In a phase I trial, patients (pts) with HER2-mutated NSCLC who received T-DXd had a confirmed objective response rate (ORR) of 72.7% (8/11) (Tsurutani et al, WCLC 2018). DESTINY-Lung01 (NCT03505710) is an ongoing, multicenter, phase II study of T-DXd in pts with non-squamous NSCLC overexpressing HER2 or containing a HER2-activating mutation. We report data for the cohort with HER2 mutations after a median follow-up of 8.0 mo (range, 1.4-14.2 mo). Methods: Pts were treated with T-DXd 6.4 mg/kg every 3 weeks. The primary endpoint was confirmed ORR (complete response [CR] + partial response [PR]) by ICR. Additional endpoints were disease control rate (DCR; CR + PR + stable disease), duration of response (DOR), progression-free survival (PFS), and safety. Results: At data cutoff (25 Nov 2019), 42 pts (64.3% female) had received T-DXd. Median age was 63.0 years (range, 34-83 years; < 65 y, 59.5%); 45.2% had central nervous system metastases; ECOG performance status was 0 in 23.8% of pts and 1 in 76.2%. HER2 mutations were predominantly in the kinase domain (90.5%). Most pts (90.5%) had prior platinum-based chemotherapy and 54.8% had anti–PD-1 or –PD-L1 treatment; median number of prior treatment lines was 2 (range, 1-6). Median treatment duration was 7.75 mo (range, 0.7-14.3 mo); 45.2% of pts remained on treatment. Confirmed ORR by ICR among the 42 pts was 61.9% (95% CI, 45.6%-76.4%); median DOR was not reached at data cutoff; 16 of 26 responders remained on treatment at data cutoff; DCR was 90.5% (95% CI, 77.4%-97.3%); estimated median PFS was 14.0 mo (95% CI, 6.4-14.0 mo). All pts (42/42) had treatment-emergent adverse events (TEAEs); 64.3% were grade ≥ 3 (52.4% drug-related), including decreased neutrophil count (26.2%) and anemia (16.7%). There were 5 cases (11.9%) of drug-related interstitial lung disease (ILD) as adjudicated by an independent committee (all grade 2, no grade ≥ 3) and 1 case of grade 1 ILD is pending adjudication. TEAEs led to dose interruption in 25 pts (59.5%), dose reduction in 16 pts (38.1%), and treatment discontinuation in 10 pts (23.8%). Conclusions: T-DXd demonstrated promising clinical activity with high ORR and durable responses in pts with HER2-mutated NSCLC. The safety profile was generally consistent with previously reported studies. Clinical trial information: NCT03505710 .


2011 ◽  
Vol 29 (18_suppl) ◽  
pp. LBA5007-LBA5007 ◽  
Author(s):  
C. Aghajanian ◽  
N. J. Finkler ◽  
T. Rutherford ◽  
D. A. Smith ◽  
J. Yi ◽  
...  

LBA5007 Background: BEV, a humanized anti-VEGF monoclonal antibody, has shown a progression-free survival (PFS) benefit in 2 frontline phase III trials in patients with EOC, PPC and FTC. The therapeutic impact of BEV in combination with carboplatin (C) and gemcitabine (G) followed by single agent BEV to disease progression (PD) was evaluated in this phase III trial in the platinum-sensitive recurrent setting. Methods: Patients had recurrent, platinum-sensitive EOC, PPC or FTC, 1 prior regimen, no prior BEV, ECOG performance status 0-1, measurable disease. Subjects were randomized to: Arm A: [IV C (AUC 4, Day (D) 1) + G (1,000 mg/m2 D1 and 8) + placebo (PL) D1] q21D x 6 cycles (c) → PL q21D until PD or unacceptable toxicity (tox) Arm B: [CG + BEV (15 mg/kg) D1] q21D x 6 c → BEV q21D until PD or tox primary endpoint was investigator assessed PFS (RECIST). Secondary endpoints included objective response (OR), overall survival (OS), duration of response and safety. The design provided 80% power to detect a 27% reduction in the hazard of progression or death in Arm B vs A, limiting the overall type I error of 5%. Results: OCEANS enrolled 484 patients (242 per arm) from 4/07 - 1/10, median follow up of 24 months. BEV plus CG followed by single agent BEV to PD significantly increased PFS compared to CG alone (HR=0.484, p<0.0001). OR increased by 21% (p<0.0001). OS data is immature with only 29% of patients having had an event. The safety profile was consistent with other BEV trials. Conclusions: Results show a statistically significant and clinically relevant benefit when bevacizumab is added to chemotherapy in patients with recurrent, platinum sensitive EOC, PPC, and FTC. This is the first phase III trial of an antiangiogenic to demonstrate a clinical benefit to these patients. [Table: see text]


2009 ◽  
Vol 27 (15_suppl) ◽  
pp. 8050-8050 ◽  
Author(s):  
N. B. Leighl ◽  
P. Zatloukal ◽  
J. Mezger ◽  
R. Ramlau ◽  
V. Archer ◽  
...  

8050 Background: AVAiL, an international, placebo-controlled, phase III trial, evaluated Bv plus CG in pts with previously untreated advanced, non-squamous NSCLC, with performance status 0/1. A retrospective analysis was performed to assess the efficacy and safety of Bv plus CG in the subpopulation of elderly pts (≥65 years [yrs]). Methods: 1,043 pts (age 20–83) were randomized to C 80mg/m2 and G 1,250mg/m2 q3w for up to 6 cycles plus either Bv 7.5mg/kg q3w (Bv 7.5; n=345), Bv 15mg/kg q3w (Bv 15; n=351) or placebo (Pl; n=347). Bv/Pl was administered until disease progression. The primary endpoint was progression-free survival (PFS); secondary endpoints included overall survival (OS), objective response rate (RR) and safety. Efficacy and safety were compared between pts <65 yrs vs ≥65 yrs. Results: Efficacy data were available for 304 pts ≥65 yrs (median age 68), and 739 pts <65 yrs (median age 55). Baseline characteristics were similar between the groups. In the Bv arms, 179 pts (93%) received ≥1 cycle of treatment; 85 (47.5%) completed >6 cycles. Bv-treated pts ≥65 yrs derived an improvement in PFS compared to Pl (Bv 7.5: HR 0.71, p 0.023; Bv 15: HR 0.84, p= 0.25). ORRs were 40%, 29% and 30% for pts ≥65 in the Bv 7.5, Bv 15 and Pl arms. Survival was similar in all treatment arms regardless of age, (pts ≥65 Bv 7.5 HR 0.84; Bv 15 HR 0.88, p=NS). Safety data were available for 284 pts ≥65 yrs and 702 pts <65 yrs. There were no safety signals of concern in older patients. Grade ≥3 toxicities occurred in 84%, 80% and 80% of older pts treated with Bv 7.5, Bv 15 and Pl. Pts ≥65 yrs had no episodes of severe hemoptysis, but in Bv 7.5 and Pl arms, were more likely to have other bleeding, compared to pts <65. The incidence of hypertension and febrile neutropenia were similar in pts ≥65 and <65 yrs. Treatment-related deaths were not increased in Bv-treated pts ≥65 yrs vs pts <65 yrs or in Bv-arms vs Pl. Conclusions: The PFS benefit from Bv-based treatment in the elderly subpopulation is similar to that observed in the overall patient population. No particular safety signals were identified in this population, suggesting acceptable tolerability of Bv in elderly pts in AVAiL. [Table: see text]


2012 ◽  
Vol 30 (4_suppl) ◽  
pp. 531-531 ◽  
Author(s):  
Jean Yves Douillard ◽  
Salvatore Siena ◽  
Josep Tabernero ◽  
Ronald L. Burkes ◽  
Mario Edmundo Barugel ◽  
...  

531^ Background: Final PRIME results showed that pmab + CT significantly improved progression-free survival (PFS) and objective response rate vs CT alone for first-line wild type (WT) KRAS mCRC. Efficacy and PRO by ST severity from the final descriptive analysis of PRIME are presented. Methods: Patients (pts) had no prior chemotherapy for mCRC, ECOG performance status ≤ 2, and tumor tissue available for biomarker testing. The final analysis occurred 30 months after the last pt was enrolled; the primary endpoint was PFS; secondary endpoints included OS, objective response, and safety. Pts who received treatment and were alive without progression at day 28 were included in the ST analysis. Results: 1183 pts were randomized. 1057 pts with WT or MT KRAS mCRC met the criteria for inclusion in the ST analysis. Maximum grade ST was observed by day 28 in > 50% of pts. Results are shown ( table ). Overall differences in change from baseline of the least square means from a mixed effects model of the EQ-5D Overall Health Rating for pmab + CT (n = 285) minus CT alone (n = 294) and for ST gr 0-1 (n = 53) minus ST gr 2-4 (n = 232) were −1.069 (95% CI: −3.6277 to 1.4896) and 0.8971 (95% CI: ‐4.0224 to 5.8167), respectively. The overall safety profile was broadly comparable across ST groups and treatment arms. Conclusions: Pts with WT KRAS mCRC receiving pmab with ST gr 2-4 had longer PFS and OS vs pts receiving CT alone. PRO were not adversely affected by ST severity. [Table: see text]


2013 ◽  
Vol 31 (15_suppl) ◽  
pp. 3620-3620 ◽  
Author(s):  
Jean-Yves Douillard ◽  
Salvatore Siena ◽  
Josep Tabernero ◽  
Ronald L. Burkes ◽  
Mario Edmundo Barugel ◽  
...  

3620 Background: The primary and final analyses of PRIME demonstrated that pmab + FOLFOX4 significantly improved progression-free survival (PFS) vs FOLFOX4 alone for first-line treatment of patients (pts) with wild-type (WT) KRAS exon 2 mCRC. Methods: Pts were randomized 1:1 to pmab 6.0 mg/kg every 2 weeks + FOLFOX4 or FOLFOX4 alone and had no prior chemotherapy for mCRC, ECOG performance status ≤ 2, and tumor tissue for biomarker testing. The primary endpoint was PFS by central assessment. Secondary endpoints included OS, objective response rate, and safety. KRAS exon 2 tumor status was determined by a blinded central lab prior to the primary analysis. This exploratory analysis of updated survival (>80% OS events) estimated the treatment effect of pmab + FOLFOX4 compared with FOLFOX4 alone on OS by KRAS exon 2 status. Previous analyses in pts with WT KRAS exon 2 tumor status reported OS with an event rate of 54% of pts in the primary analysis and 68% of pts in the final analysis. Results: 1183 pts were randomized and received treatment: 593 pts in the pmab + FOLFOX4 arm and 590 pts in the FOLFOX4 alone arm. The KRAS exon 2 ascertainment rate was 93%, consistent with the primary analysis. 535/656 pts (82%) with WT KRAS exon 2 mCRC had an OS event at the time of this analysis. Results are shown (Table). Conclusions: In this updated analysis, an improvement in OS was observed in pts with WT KRAS exon 2 mCRC treated with pmab + FOLFOX4 vs FOLFOX4 alone (p = 0.03). Median OS was reduced in pts with mutant (MT) KRAS mCRC (p = 0.16) and is consistent with previous analyses. Updated efficacy and safety results will be presented. KRAS testing is critical to select appropriate pts with mCRC for treatment with pmab. Clinical trial information: NCT00364013. [Table: see text]


2013 ◽  
Vol 31 (4_suppl) ◽  
pp. 249-249 ◽  
Author(s):  
Calin Cainap ◽  
Shukui Qin ◽  
Wen-Tsung Huang ◽  
Ik-Joo Chung ◽  
Hongming Pan ◽  
...  

249 Background: Linifanib (ABT-869; Lin) is a potent and selective inhibitor of the vascular endothelial growth factor (VEGF) and platelet-derived growth factor (PDGF) receptor tyrosine kinase families. In a phase II trial in patients (pts) with advanced HCC, Lin showed clinical activity (objective response rate [ORR] 10.5% in Child-Pugh A [CPA] pts). This open-label, global phase 3 trial evaluated Lin versus sorafenib (Sor) as first-line therapy in pts with advanced CPA HCC (NCT01009593). Methods: Pts were randomized 1:1 to Lin 17.5 mg QD or Sor 400 mg BID and stratified by region (non-Asia/Japan/rest of Asia), ECOG performance status (0/1), vascular invasion or extrahepatic spread (yes/no) and HBV infection (yes/no). The primary efficacy endpoint was overall survival (OS); both non-inferiority (margin 1.0491) and superiority hypotheses were to be tested. Secondary efficacy endpoints included time to progression (TTP) and ORR, using RECIST v1.1. AE severity was graded using NCI-CTCAE v4.0. Results: 1035 pts (median age 60 y, 68% Asian, 65% ECOG 0, 49% HBV, 70% vascular invasion or extrahepatic spread) were randomized at 149 sites in 26 countries. Hazard ratio (HR) for OS was 1.046 (95% CI: 0.896, 1.221). Median OS (95% CI) was 9.1 months (m) (8.1, 10.2) on Lin and 9.8 m (8.3, 11.0) on Sor. For all pre-specifed subgroup analyses, OS HRs ranged from 0.793-1.119, and the 95% CI contained 1.0. TTP HR was 0.759 (95% CI: 0.643, 0.895; p=0.001) favoring Lin. Median TTP (95% CI) was 5.4 m (4.2, 5.6) on Lin and 4.0 m (2.8. 4.2) on Sor. ORR was 13.0% on Lin and 6.9% on Sor. Grade 3/4 AEs, serious AEs and AEs leading to discontinuations, dose interruptions and reductions were more frequent on Lin versus Sor (all p<0.001). Conclusions: Lin and Sor resulted in similar OS in advanced HCC. Predefined superiority and non-inferiority OS boundaries were not met for Lin. Secondary endpoints (TTP and ORR) favored Lin while safety results favored Sor. Clinical trial information: NCT01009593.


2009 ◽  
Vol 27 (15_suppl) ◽  
pp. 5018-5018
Author(s):  
N. M. Hahn ◽  
W. M. Stadler ◽  
R. T. Zon ◽  
D. M. Waterhouse ◽  
J. Picus ◽  
...  

5018 Background: Despite CG therapy, most metastatic UC patients die from their disease. Novel approaches are needed. Combining anti-angiogenic therapy with chemotherapy has improved outcomes in other malignancies, offering hope for similar improvements in UC patients. Methods: Metastatic or unresectable chemonaive UC patients (pts) with an ECOG performance status of 0–1 received C 70 mg/m2 iv d1, G 1,000–1,250 mg/m2 iv d1, 8, and B 15 mg/kg iv d1 on a q21d cycle for up to 8 cycles. Gemcitabine was reduced to 1,000 mg/m2 iv d1, 8 for all subsequent pts after 7 thromboembolic events were noted in the first 17 pts. The primary endpoint was progression free survival (PFS). The trial was designed to detect a 33% improvement in PFS from 7.5 months with traditional CG therapy to 11.25 months with CGB. Results: By December 2008, 45 pts were enrolled, with 43 evaluable for toxicity, 36 for response. Demographics include: 33 (77%) male, 10 (23%) female; median age 66 (Range: 41 - 78); 26 (60%) and 17 (40%) ECOG 0/1; 19 (44%) and 24 (56%) lymph node only / visceral metastases. PFS will be evaluated in May 2009 when all pts will have more than 6 month follow-up data. 14 (33%) and 6 (14%) pts experienced grade 3 or 4 hematologic toxicity (4 pts - thrombocytopenia, 2 pts - neutropenic fever). Grade 3 or 4 nonhematologic toxicity was observed in 24 (56%) and 9 (21%) pts (DVT/PE - 9 pts, CNS hemorrhage/proteinuria/hypertension - 1 pt each) Best RECIST response was: complete response 6 pts (17%, 95% CI 6–33%), partial response 18 pts (50%, 95% CI 33–67%); with overall response rate of 67% (95% CI 51–82%). Stable disease lasting at least 12 weeks was observed in 10 pts (28%, 95% CI 14–45%) and progressive disease in 2 pts (5%, 95% CI 1–19%). Conclusions: CGB demonstrates significant clinical activity in the first-line treatment of metastatic UC patients at the expense of considerable toxicity. The durability of disease control will be determined by assessment of PFS. A phase III trial to further define the toxicity risk vs. clinical benefit of bevacizumab addition to platinum-based doublets is planned in this population. [Table: see text]


2013 ◽  
Vol 31 (15_suppl) ◽  
pp. 5502-5502 ◽  
Author(s):  
Andres Cervantes-Ruiperez ◽  
Paul Hoskins ◽  
Ignace Vergote ◽  
Elizabeth A. Eisenhauer ◽  
Prafull Ghatage ◽  
...  

5502 Background: Topotecan was evaluated in a novel combination regimen in comparison to standard therapy in front-line EOC. Methods: Women with newly diagnosed advanced EOC stages IIB-IV, ECOG performance status (PS) 0-1, age < 75, were randomized to either Arm 1: cycles 1 - 4: cisplatin 50 mg/m2 d1 plus topotecan 0.75 mg/m2 d1-5 IV; cycles 5 - 8: paclitaxel 175 mg/m2over 3 hrs d1 followed by carboplatin AUC5 day 1 or Arm 2: paclitaxel plus carboplatin as in Arm 1 for 8 cycles. The primary endpoint was progression free survival (PFS) and secondary endpoints included objective response, overall survival (OS), adverse event (AE) and Quality of Life (QoL). The sample size required 800 pts and 631 events to detect an improvement in PFS from 16 to 20 months (power 80%, 2-sided alpha 0.05). Results with 3.6 years median follow-up (MFU) were reported previously: there was no significant difference in PFS (Hoskins P, JNCI 2010). Final results including OS after MFU of 8.2 years are reported. Results: From 2001 to 2005, 819 pts (409 Arm 1, 410 Arm 2) were randomized. 704 PFS events and 605 deaths have occurred. PFS results are similar to first report: Median (months [mo]): 14.6 (Arm 1) and 16.2 (Arm 2), hazard ratio (HR) 1.03 (95% CI:0.81-1.30; p = 0.83). Median OS is 44.2 mo (Arm 1) and 44.8 mo (Arm 2), HR: 0.92 (95% CI:0.71-1.19; p=0.54). Baseline factors found to be independent predictors of OS in multivariate analysis are: a) pre-randomization surgery (debulking with no macro residual disease (MRD) to no debulking HR: 0.47; 95%CI:0.37-0.58; p < 0.0001; debulking with MRD (<1 cm) to no debulking HR: 0.76; 95%CI:0.61-0.94; p = 0.01), b) Stage (stage II to III or IV HR:0.52; 95%CI:0.36-0.76; p = 0.0007) and c) PS (0 vs 1 HR:0.76; 95%CI:0.63-0.91; p = 0.004). Post-treatment AEs were not significantly different in the two arms. Conclusions: OV16 final results confirm that sequential doublets of topotecan and cisplatin followed by carboplatin and paclitaxel offer no improvement in outcomes compared to carboplatin and paclitaxel. Pretreatment debulking, stage II and PS 0 are predictive of longer OS. Clinical trial information: NCT00028743.


2013 ◽  
Vol 31 (4_suppl) ◽  
pp. 446-446 ◽  
Author(s):  
Lee Steven Schwartzberg ◽  
Fernando Rivera ◽  
Meinolf Karthaus ◽  
Gianpiero Fasola ◽  
Jean-Luc Canon ◽  
...  

446 Background: Pmab has demonstrated significant improvement in progression-free survival (PFS) in pts with WT KRAS mCRC as 1st-line tx in a phase III trial comparing pmab + FOLFOX4 vs FOLFOX4 alone. Here, we describe the results of PEAK, a multicenter, randomized phase II study evaluating pmab + mFOLFOX6 and bev + mFOLFOX6 in pts with previously untreated WT KRASmCRC. Methods: Pts were randomized 1:1 to pmab 6.0 mg/kg + mFOLFOX6 Q2W or bev 5.0 mg/kg + mFOLFOX6 Q2W. Pt eligibility criteria included: WT KRASmCRC, ECOG performance status ≤ 1, and no prior chemotherapy, anti-VEGF tx, or anti-EGFR tx for mCRC. The primary endpoint was PFS; secondary endpoints included overall survival (OS), objective response rate (ORR), and safety. No formal hypothesis was tested. Results: 285 pts with WT KRASmCRC were randomized and 278 pts received tx. Demographics were balanced between arms. Intent-to-treat efficacy results are shown (Table). Worst grade 3/4 adverse events (AE) occurred in 86% of pts in the pmab + mFOLFOX6 arm vs 76% of pts in the bev + mFOLFOX6 arm. Grade 5 AEs occurred in 5% of pts in the pmab + mFOLFOX6 arm and 6% of pts in the bev + mFOLFOX6 arm. Tx discontinuation due to any AE was 24% in the pmab + mFOLFOX6 arm and 27% in the bev + mFOLFOX6 arm. Conclusions: In this estimation study of pts with WT KRASmCRC without any prior therapy for mCRC, PFS and ORR were similar between arms. The median OS was not reached in the pmab + mFOLFOX6 arm. The safety profile for both arms was consistent with previously reported studies of either combination. Tx discontinuation rates due to AEs were similar between arms. Clinical trial information: NCT00819780. [Table: see text]


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