Epacadostat plus nivolumab in patients with advanced solid tumors: Preliminary phase I/II results of ECHO-204.

2017 ◽  
Vol 35 (15_suppl) ◽  
pp. 3003-3003 ◽  
Author(s):  
Raymond P. Perez ◽  
Matthew John Riese ◽  
Karl D. Lewis ◽  
Mansoor N. Saleh ◽  
Adil Daud ◽  
...  

3003 Background: ECHO-204 is an ongoing, open-label, phase 1/2 (P1/2) study of epacadostat (E; potent and selective oral inhibitor of the immunosuppressive enzyme indoleamine 2,3-dioxygenase 1) plus PD-1 inhibitor nivolumab (N) in patients (pts) with advanced cancers (NSCLC, MEL, OVC, CRC, SCCHN, B-cell NHL [including DLBCL], GBM). Preliminary P1/2 safety and tolerability outcomes for the overall study population and P2 response for select tumor types (SCCHN, MEL, OVC, CRC) are reported. Methods: In P1 dose escalation, pts received E (25, 50, 100, 300 mg BID) + N (3 mg/kg Q2W); in P2 cohort expansion, pts received E (100 or 300 mg BID) + N (240 mg Q2W). Safety/tolerability was assessed in pts receiving ≥1 E + N dose. Response was assessed in RECIST v1.1 evaluable pts; for recently enrolled pt subgroups, only preliminary DCR (CR+PR+SD) is presented. Results: As of 29OCT2016,241 pts (P1, n = 36; P2, n = 205) were enrolled. No DLT was observed in P1. Most common TRAEs (≥15%) in pts treated with E 100 mg (n = 70) and E 300 mg (n = 135) were rash (33% and 22%, respectively), fatigue (26% and 31%), and nausea (24% and 19%). Rash was the most common grade ≥3 TRAE in E 100 mg and E 300 mg subgroups (10% and 12%). TRAEs led to discontinuation in 7% (E 100 mg) and 13% (E 300 mg) of pts. There were no TR-deaths. For the 23 recently enrolled, efficacy-evaluable SCCHN pts treated with E 300 mg, preliminary DCR was 70% (n = 16). Of 30 MEL pts, 8 were treated with E 100 mg and 22 were more recently enrolled and treated with E 300 mg. ORR (CR+PR) and DCR in MEL pts treated with E 100 mg were 75% (n = 6; all PR) and 100% (n = 8; 2 SD), respectively. Preliminary DCR in MEL pts treated with E 300 mg was 64% (n = 14). Of 29 OVC pts, 18 were treated with E 100 mg and 11 with E 300 mg.ORR and DCR for OVC pts treated with E 100 mg were 11% (n = 2; 2 PR) and 28% (n = 5; 3 SD); for 11 OVC pts treated with E 300 mg, ORR and DCR were 18% (n = 2; 2 PR) and 36% (n = 4; 2 SD).For 25 CRC pts (all E 100 mg), ORR and DCR were 4% (n = 1; PR) and 24% (n = 6; 5 SD).Safety/efficacy evaluations are ongoing for all cohorts. Conclusions: E + N was generally well tolerated up to the maximum E 300-mg dose. P2 ORR/DCR outcomes are promising, particularly in SCCHN and MEL pts. Updated data will be presented at the meeting. Clinical trial information: NCT02327078.

2017 ◽  
Vol 35 (15_suppl) ◽  
pp. 9014-9014 ◽  
Author(s):  
Tara C. Gangadhar ◽  
Bryan J. Schneider ◽  
Todd Michael Bauer ◽  
Jeffrey S. Wasser ◽  
Alexander I. Spira ◽  
...  

9014 Background: ECHO-202/KEYNOTE-037 is an open-label, phase 1/2 study of epacadostat (a potent and selective oral inhibitor of the immunosuppressive enzyme indoleamine 2,3-dioxygenase 1) plus pembrolizumab (E + P) in patients (pts) with advanced tumors. We report preliminary efficacy and safety outcomes for the phase 1/2 NSCLC cohort. Methods: Adult pts with prior platinum-based therapy (tx) and no prior checkpoint inhibitor tx were eligible. Phase 1 dose-escalation tx was E (25, 50, 100, 300 mg PO BID) + P (2 mg/kg or 200 mg IV Q3W); MTD was not exceeded. E (100 mg BID) + P (200 mg Q3W) tx doses were selected for phase 2 cohort expansion. Efficacy was evaluated by tumor proportion score (TPS [% viable tumor cells, PD-L1 staining]: < 50% and ≥50%) and by prior lines of tx in RECIST 1.1 evaluable pts. Safety was assessed in pts receiving ≥1 E + P dose. Results: As of 29OCT2016,43 pts (phase 1, n = 12; phase 2, n = 31) were evaluated. Median age was 65 years, 58% of pts were women, 12% were EGFR-positive, and 23% were KRAS-positive. Most pts had a history of smoking (84%), ≤2 prior lines of tx (84%), and no prior TKI tx (93%). For the 40 efficacy-evaluable pts, ORR (CR+PR) and DCR (CR+PR+SD) were 35% (14/40; 14 PR) and 60% (24/40; 10 SD), respectively. PD-L1 TPS test results were available in 28/40 efficacy-evaluable pts. ORR and DCR for pts with TPS ≥50% and ≤2 prior tx were 43% (3/7; all PR) and 57% (4/7; 1 SD), respectively; for pts with TPS < 50% and ≤2 prior tx, ORR and DCR were 35% (6/17; all PR) and 53% (9/17; 3 SD). Among the 40 efficacy-evaluable pts, 12/14 responses were ongoing (range, 1+ to 519 days) at data cutoff. PFS and biomarker analyses are ongoing. Across all 43 pts, most frequent TRAEs were fatigue (19%), arthralgia (9%), and increased AST (9%); 16% of pts had grade ≥3 TRAEs, and increased lipase (asymptomatic) was the only grade ≥3 TRAE that occurred in > 1 pt (n = 2). Two pts discontinued due to TRAEs (grade 3 increased AST, grade 2 increased ALT [n = 1]; grade 2 brain edema [n = 1]). Conclusions: E + P was generally well tolerated and associated with promising responses in pts with NSCLC. A phase 3 NSCLC study is planned. Clinical trial information: NCT02178722.


2017 ◽  
Vol 35 (15_suppl) ◽  
pp. 1103-1103 ◽  
Author(s):  
Alexander I. Spira ◽  
Omid Hamid ◽  
Todd Michael Bauer ◽  
Virginia F. Borges ◽  
Jeffrey S. Wasser ◽  
...  

1103 Background: Epacadostat is an oral, potent, and selective inhibitor of indoleamine 2,3-dioxygenase 1, a tryptophan-catabolizing enzyme that induces immune tolerance via T-cell suppression and is associated with poor patient (pt) survival when overexpressed in some cancers. The ongoing, open-label, phase 1/2 (P1/2) ECHO-202/KEYNOTE-037 study is evaluating the efficacy, safety, and tolerability of epacadostat plus PD-1 inhibitor pembrolizumab (E + P) in pts with advanced/recurrent cancers. We report P1/2 study outcomes for triple-negative breast cancer (TNBC) pts and P2 outcomes for ovarian cancer (OVC; no P1) pts as of a 29OCT2016 data cutoff. Methods: Eligible pts were ≥18 years old with no prior checkpoint inhibitor treatment (tx); prior platinum/taxane tx was required for OVC pts. As part of P1 dose escalation, TNBC pts received E (300 mg BID) + P (200 mg Q3W). In P2, TNBC and OVC pts received E (100 mg BID) + P (200 mg Q3W). Response (RECIST v1.1) was assessed in evaluable pts. Safety and tolerability were assessed in pts with ≥1 dose of E + P. Results: A total of 39 pts with TNBC and 37 with OVC were enrolled. The majority of TNBC pts (56%, n = 22) and OVC pts (78%, n = 29) received ≥3 prior lines of tx. For TNBC pts, ORR (CR+PR) was 10% (n = 4; all PR) and DCR (CR+PR+SD) was 36% (n = 14; 10 SD); ORR and DCR for pts with ≤2 prior tx were 12% (n = 2) and 29% (n = 5), respectively, and for ≥3 prior tx were 9% (n = 2) and 41% (n = 9). For OVC pts, ORR was 8% (n = 3; all PR) and DCR was 35% (n = 13; 10 SD); ORR and DCR for pts with ≤2 prior tx were 13% (n = 1) and 25% (n = 2), and for ≥3 prior tx were 7% (n = 2) and 38% (n = 11). The most common TRAEs (≥15% of pts) were rash (18%), fatigue (15%), and nausea (15%) in the 39 TNBC pts, and fatigue (19%) in the 37 OVC pts. Grade ≥3 TRAEs occurred in 13% of TNBC pts (n = 5; none in > 1 pt) and 19% of OVC pts (n = 7; only rash occurred in > 1 pt [n = 3]). TRAEs led to discontinuation in 1 TNBC pt (grade 3 ascites) and 1 OVC pt (grade 2 arthralgia). Conclusions: E + P tx was generally well tolerated and showed antitumor activity consistent with previously reported P monotherapy in pts with advanced TNBC or OVC. Biomarker analysis is ongoing to characterize pt populations enrolled in this study. Clinical trial information: NCT02178722.


2017 ◽  
Vol 35 (15_suppl) ◽  
pp. 4515-4515 ◽  
Author(s):  
Primo Lara ◽  
Todd Michael Bauer ◽  
Omid Hamid ◽  
David C. Smith ◽  
Thomas Gajewski ◽  
...  

4515 Background: Epacadostat (E) is a potent oral inhibitor of indoleamine 2,3-dioxygenase 1 (IDO1), a tryptophan-catabolizing enzyme that induces immune tolerance by T-cell suppression. Preclinical and clinical data suggest that epacadostat has antitumor activity when combined with checkpoint inhibitors, including the PD-1 inhibitor pembrolizumab (P). ECHO-202/KEYNOTE-037 is an ongoing open-label, phase 1/2 (P1/2) study evaluating E + P in multiple tumor types. We report preliminary P1/2 efficacy and safety data for the advanced renal cell carcinoma (RCC) cohort as of a 29OCT2016 data cutoff. Methods: Eligible patients (pts) had advanced clear-cell RCC, prior antiangiogenic therapy (tx), and no prior checkpoint inhibitor tx. In P1 dose escalation (3+3+3), pts received E (25, 50, 100, or 300 mg PO BID) + P (2 mg/kg or 200 mg IV Q3W); MTD was not exceeded. E (100 mg BID) + P (200 mg Q3W) dosing was selected for P2 cohort expansion. Response was assessed in RECIST 1.1 evaluable pts. Safety/tolerability was assessed in pts receiving ≥1 E + P dose. Results: 33 pts (P1, n = 11; P2, n = 22) were enrolled (median age, 63 years; 70% men; 97% white; MSKCC criteria of favorable, intermediate, and poor in 6%, 64%, and 12% of pts, respectively). Of 30 efficacy-evaluable pts, 63% (n = 19) had 0–1 prior tx and 37% (n = 11) had ≥2 prior tx for advanced disease. ORR (CR+PR) and DCR (CR+PR+SD) for pts with 0–1 prior tx was 47% (9/19; 1 CR, 8 PR) and 58% (11/19; 1 CR, 8 PR, 2 SD), respectively; for pts with ≥2 prior tx, ORR and DCR were 0% and 36% (4/11; all SD). At data cutoff, 9/9 responses were ongoing (range, 1+ to 372+ days). PFS and biomarker analyses are ongoing. TRAEs occurring in ≥10% of the 33 pts included fatigue and rash (36% each); and arthralgia, diarrhea, pruritus, and pyrexia (12% each). Grade ≥3 TRAEs occurred in 15% of pts (none in > 1 pt). Two pts discontinued due to TRAEs (grade 3 autoimmune hepatitis, n = 1; grade 3 aseptic meningitis/headache/nausea/vomiting/anxiety, n = 1). Conclusions: E + P was generally well tolerated and associated with encouraging response outcomes in advanced RCC pts with 0–1 prior line of tx. E + P represents a novel immunotherapeutic strategy. A phase 3 RCC study is planned. Clinical trial information: NCT02178722.


2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Linda T. Vahdat ◽  
Peter Schmid ◽  
Andres Forero-Torres ◽  
Kimberly Blackwell ◽  
Melinda L. Telli ◽  
...  

AbstractThe METRIC study (NCT#0199733) explored a novel antibody–drug conjugate, glembatumumab vedotin (GV), targeting gpNMB that is overexpressed in ~40% of patients with triple-negative breast cancer (TNBC) and associated with poor prognosis. The study was a randomized, open-label, phase 2b study that evaluated progression-free survival (PFS) of GV compared with capecitabine in gpNMB-overexpressing TNBC. Patients who had previously received anthracycline and taxane-based therapy were randomized 2:1 to receive, GV (1.88 mg/kg IV q21 days) or capecitabine (2500 mg/m2 PO daily d1–14 q21 days). The primary endpoint was RECIST 1.1 PFS per independent, blinded central review. In all, 327 patients were randomized to GV (213 treated) or capecitabine (92 treated). Median PFS was 2.9 months for GV vs. 2.8 months for capecitabine. The most common grade ≥3 toxicities for GV were neutropenia, rash, and leukopenia, and for capecitabine were fatigue, diarrhea, and palmar-plantar erythrodysesthesia. The study did not meet the primary endpoint of improved PFS over capecitabine or demonstrate a relative risk/benefit improvement over capecitabine.


2020 ◽  
Author(s):  
Ke Cheng ◽  
Yu-Wen Zhou ◽  
Ye Chen ◽  
Zhi-Ping Li ◽  
Meng Qiu ◽  
...  

Abstract Background Irinotecan-based doublet chemotherapy strategy was standard second-line backbone treatment for patients with oxaliplatin‑refractory metastatic colorectal cancer(mCRC). The aim of this study was to evaluate tolerability and efficacy of raltitrexed combined with irinotecan biweekly administered as the second-line therapy for mCRC patients.Methods The study was a single-center, non-randomized, open-label phase II trial. Patients with mCRC after failure with first-line treatment of oxaliplatin and fluoropyrimidine or its derivatives were enrolled. Irinotecan (180 mg/m2) and raltitrexed (2.5 mg/m2) were given intravenously on day 1. Cycles were repeated every 2 weeks. The primary endpoint was progression-free survival, and the secondary endpoints included overall response rate, disease control rate, overall survival and treatment related adverse events. Results Between December 2012 and October 2016, 35 patients were enrolled. 33 and 35 patients were assessed for response and safety, respectively. The overall response rate (ORR) was 8.6 %, and the disease control rate (DCR) was 71.4%. The median progression-free survival (PFS) was 4.5 months (95% CI 3.8–5.2). The median overall survival was 12.0 months (95% CI 8.5–15.5). Four patients received conversion therapy to no evidence of disease (NED), and 2 patients were still alive with beyond 24 months survival. The most common grade 3/4 hematological adverse events were leukopenia (8.6%), neutropenia (5.7%). The most common grade 3/4 nonhematological adverse events were anorexia (14.3%), vomiting (14.3%), nausea (11.4%) and fatigue (8.6%). Two patients discontinued the protocol treatment because of treatment-related gastrointestinal adverse events. No one died from treatment-related events. The incidence and severity of toxicity was irrelevant to UGT1A1 status.Conclusions The combination of irinotecan with raltitrexed is an active, convenient and acceptable toxic regimen for second-line treatment for mCRC patients, which needs further study as a chemotherapy backbone to be combined with targeted agents in mCRC.Trial registration No. ChiCTR-ONC-12002767. The study was registered with the Chinese Clinical Trial Registry at 29 Octorber 2012, http://www.chictr.org.cn/index.aspx.


2019 ◽  
Vol 21 (Supplement_6) ◽  
pp. vi27-vi27
Author(s):  
Lawrence Recht ◽  
Reena Thomas ◽  
Sophie Bertrand ◽  
Priya Yerballa ◽  
Gordon Li ◽  
...  

Abstract BACKGROUND High-grade gliomas (HGG) are characterized by dysregulated metabolism, utilizing glycolysis for energy production to support unrestricted growth. BPM 31510, an ubidecarenone (coenzyme Q10) containing lipid nanodispersion, causes a switch in cancer energy sourcing from glycolysis towards mitochondrial oxidative phosphorylation in vitro, reversing the Warburg effect and suggesting potential as an anti-tumor agent. The current study is a phase I study of BPM31510 + vitamin K in GB with tumor growth after bevacizumab (BEV). METHODS This is an open-label phase I study of BPM31510 continuous infusion with weekly vitamin K (10mg IM) in HGG patients using an mTPI design, starting at 110mg/kg, allowing for a single dose de-escalation and 2 dose-escalations. Patients had received first-line ChemoRadiation and were in recurrence following a BEV containing regimen. RESULTS 9 eligible and evaluable patients completed the 28 day DLT period. 8 patients had primary GB, 1 had anaplastic astrocytoma with confirmed pathologic transformation to GB. Median age was 55 years (27–67) and median KPS 70 (60–90) at enrollment. 4 patients were treated at the highest dose 171mg/kg, where there was a single DLT: Grade 3 AST & ALT. The most common grade 1–2 AEs possibly, probably or definitely related to drug were elevated AST, rash, and fatigue, each occurring in 3 patients. Median OS for 9 eligible/evaluable patients was 128 days (95% CI: 48–209) while PFS was 34 days (CI of mean 8.9). 3 patients are currently alive; 2 patients have survived >1 year. PK/PD data are being processed and will be presented. CONCLUSION This study confirms that BPM 31510 + vitamin K is safe and feasible in treatment-refractory HGG patients. Though this study demonstrates safety at 171mg/kg, the proposed dose for future studies in GB, based on additional pre-clinical and non-GB clinical data is 88mg/kg.


2012 ◽  
Vol 30 (15_suppl) ◽  
pp. 8531-8531 ◽  
Author(s):  
Michael S. Gordon ◽  
Harriet M. Kluger ◽  
Geoffrey Shapiro ◽  
Razelle Kurzrock ◽  
Gerald Edelman ◽  
...  

8531 Background: MET and VEGF signaling are implicated in angiogenesis, invasion, and metastasis. Cabozantinib (cabo) is an oral, potent inhibitor of MET and VEGFR2. A RDT evaluated activity and safety in 9 tumor types. Here we report on the metastatic melanoma cohort, including the ocular subtype. Methods: Eligible patients (pts) were required to have progressive measurable disease per RECIST. Pts received cabo at 100 mg qd over a 12 wk Lead-in stage. Tumor response (mRECIST) was assessed q6 wks. Treatment ≥ wk 12 was based on response: pts with PR continued open-label cabo, pts with SD were randomized to cabo vs placebo, and pts with PD discontinued. Primary endpoint in the randomized phase was progression free survival (PFS). Results: Enrollment to this cohort is complete (n = 77); all pts are unblinded. Baseline characteristics: median age 66 years; melanoma subtype: cutaneous/mucosal 70% and ocular 30%; known BRAF mutation 32%; LDH ≥ 1.1 x upper limit normal 35%; bone metastases 19%; median prior lines of therapy 1 (range 0-5). Median follow-up was 2.8 months (range 0.3 - 25). 35 pts (45%) completed the open-label Lead-in stage with 25 pts randomized to continue cabo (n=12) or to placebo (n=13). Median PFS from randomization was 5.7 months for cabo vs. 3 months for placebo (HR=0.3, p =0.055). Median PFS from Study Day 1 was 4.4 months. The estimate of PFS at month 6 (PFS6) is 44%. Evidence of objective tumor regression was observed in 39/65 pts (60%) with ≥ 1 post-baseline tumor assessment including 11/23 pts (48%) with ocular melanoma. Two bone scan evaluable pts demonstrated partial resolution of bone lesions at wk 6 accompanied by pain relief. Most common Grade 3/4 AEs were fatigue (14%), HTN (9%), constipation (4%), and diarrhea (3%); one related Grade 5 AE of diverticular perforation and peritonitis reported during Lead-in stage. Conclusions: Cabo demonstrates activity in metastatic melanoma pts, regardless of subtypes or BRAF mutation status, with improvement in PFS relative to placebo, and high rates of PFS6 and objective tumor regression. The safety profile of cabo was comparable to that of other VEGFR TKIs.


2018 ◽  
Vol 36 (4_suppl) ◽  
pp. 102-102
Author(s):  
Atsushi Takeno ◽  
Youichi Makari ◽  
Shunji Endo ◽  
Jin Matsuyama ◽  
Ryohei Kawabata ◽  
...  

102 Background: This phase II study aimed to investigate the safety and efficacy of XP compared to SP in the first-line treatment of HER2 negative AGC. Methods: Patients were randomly assigned to receive either SP (S-1 at 40–60 mg twice daily for 21 days plus cisplatin at 60 mg/ m2 on day 8, every 5 weeks) or XP (capecitabine 1,000 mg/m2 twice daily for 14 days plus cisplatin 80 mg/m2 on day 1, every 3 weeks). Primary endpoint was response rate (RR), and secondary endpoints were progression-free survival (PFS), overall survival (OS), time to treatment failure (TTF), and adverse events. Results: 84 eligible patients were randomly assigned to receive SP ( N = 41) or XP ( N = 43). No statistical difference was observed in overall RR between the SP and XP groups [51.2% (95% CI, 35.1% to 67.1%) vs. 53.5% (95% CI, 37.7% to 68.8%), P = 1.000]. Despite not significant, however, SP vs. XP showed a trend toward better PFS [median, 5.9 months vs. 4.1 months; hazard ratio (HR), 0.763; 95% CI, 0.462 to 1.259; P = .284] and OS (median, 13.5 months vs. 10.0 months; HR, 0.776; 95% CI, 0.485 to 1.244; P = .290). This trend in the SP vs. XP comparison was more pronounced in TTF (median, 4.5 months vs. 3.1 months; HR, 0.651; 95% CI, 0.421 to 1.006; P = .052). Common grade 3 to 4 hematological toxicities were neutropenia and anemia (SP group, 23% and 23%; XP group, 35% and 28%). Grade 3-4 anorexia and hyponatremia were more frequently seen in the XP group (31% and 16%) compared to the SP group (13% and 5%). Treatment-related deaths occurred in one patient (2.3%) in the XP group. Conclusions: XP failed to demonstrate the superior efficacy over SP. Higher incidence of severe toxicities by XP suggests SP as the standard 1st line chemotherapy for HER2 negative AGC in Japan. Clinical trial information: UMIN000006755.


2020 ◽  
Author(s):  
Yanshuo Cao ◽  
Ming Lu ◽  
Yu Sun ◽  
Jifang Gong ◽  
Jie Li ◽  
...  

Abstract BackgroundPreclinical studies have supported a potential synergistic antitumor activity between surufatinib and anti-programed death ligand-1 (PD-L1). We describe here the results of a single-arm, open-label phase 1 trial to evaluate the safety, preliminary efficacy, and pharmacokinetics (PK) in patients with advanced solid tumors treated with surufatinib combined with toripalimab, an inhibitor of PD-L1.MethodsThis is an open-label, dose escalation and expansion study in patients with solid tumors who had failed standard therapies or had no effective treatment. In the dose escalation stage, 3 cohorts of patients were treated with surufatinib, at dose levels of 200, 250, or 300 mg once daily (QD) in combination with a fixed dose of toripalimab 240 mg, every 3 weeks (Q3W), to evaluate maximum tolerated dose (MTD) or recommended phase 2 dose (RP2D). Additional patients were enrolled in the dose expansion phase to further assess the efficacy, safety, and PK profile.ResultsFrom April 1, 2019 to July 10, 2020, 31 patients were screened, of which 28 patients were enrolled. One patient in the 300 mg cohort experienced dose limited toxicity (DLT), a grade 3 hyperthyroidism. The top 3 most common treatment-related adverse events of ≥ grade 3 were transaminases increased (17.9%), hypertension (14.3%) and blood bilirubin increased (10.7%). No treatment-related death or treatment discontinuation was identified. The RP2D was determined to be surufatinib 250 mg QD plus toripalimab 240 mg Q3W. Overall objective response rate was 22.2% [95% confidential interval (CI) 8.6‒42.3], and disease control rate reached 81.5% (95% CI 61.9‒93.7). ConclusionsSurufatinib plus toripalimab was well-tolerated, with no unexpected safety signals, and showed promising antitumor activity in patients with advanced solid tumors. Trial registrationclinicaltrials.gov, NCT03879057; Registered March 18, 2019, https://clinicaltrials.gov/ct2/show/NCT03879057


2009 ◽  
Vol 27 (15_suppl) ◽  
pp. 3557-3557 ◽  
Author(s):  
L. Chow ◽  
Z. Jiang ◽  
R. Epstein ◽  
I. Bondarenko ◽  
A. Awada ◽  
...  

3557 Background: Neratinib (HKI-272) is a potent irreversible pan-ErbB inhibitor of the tyrosine kinase receptors, erbB-1,-2 and -4. In this phase 1 study, a combination dose of neratinib plus paclitaxel that is tolerable was determined in patients (pts) with solid tumors, and safety and preliminary efficacy were assessed in pts with erbB-2+ metastatic breast cancer. Methods: In this open label, 2-part study, ascending multiple daily oral doses of neratinib (160 mg, 240 mg) were administered in combination with IV paclitaxel 80 mg/m2, if tolerable, or 70 mg/m2 on days 1, 8 and 15. Pts with solid tumors and pts with only metastatic erbB-2+ breast cancer are enrolled in part 1 and 2, respectively. Tumor measurements were made at screening and at every 8 weeks (2 cycles) by modified RECIST criteria. Timed blood samples were collected for neratinib and paclitaxel plasma concentration determination, and PK analyses were performed using a noncompartmental method. Results: Data for 54 pts as of 30 Oct 2008 are presented (median age [range] of 51.5 [20–74] yrs; 91% female; 26 % with prior trastuzumab treatment of median duration [range] 32.5 [10–52] wks; 15% with prior lapatinib treatment). Tumor types in part 1 included breast, endometrial, cervical, colorectal and esophageal cancer. There were no dose-limiting toxicities (DLTs) at the 240 mg neratinib-80 mg/m2 paclitaxel dose, and as standard doses of neratinib and paclitaxel were reached, there was no reason for further escalation. Neratinib-related AEs, any grade in ≥10% of pts included diarrhea (50%), neutropenia (17%), rash (13%), nausea (11%) and vomiting (11%). Neratinib- related AEs, grade ≥3 in ≥2% of pts were diarrhea (20%), neutropenia (9%) and dehydration (4%). Only 2 pts (at the 240 mg neratinib-80 mg/m2 paclitaxel dose) had dose reductions due to diarrhea. In 35 efficacy evaluable pts, 5 had confirmed partial response (PR). Confirmed clinical benefit (PR and prolonged disease stabilization) was seen in 2 pts in part 1, 1 pt with endometrial cancer and 1 pt with cervical cancer. Conclusions: This combination of 240 mg neratinib and 80 mg/m2 paclitaxel was tolerable with a toxicity profile similar to that observed for neratinib, and had promising antitumor activity in pts with solid tumors and erbB-2 + breast cancer. [Table: see text]


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