CHICAGO ( TheStreet) -- Ready, set ... ASCO download!
That's what a lot of healthcare investors are doing right now on the web site of the American Society of Clinical Oncology. It's ASCO abstract release day, which means summaries of thousands of cancer drug clinical trials were just made available in advance of the ASCO annual meeting at the end of the month.
I'm here to help save you some time with the searching and downloading. Below are 10 ASCO research abstracts of high interest to healthcare investors, covering drugs from Abbvie (ABBV), Ariad Pharmaceuticals (ARIA), Arqule (ARQL), Array Biopharma (ARRY), BioMarin Pharma (BMRN), Clovis (CLVS), Curis (CRIS), Halozyme (HALO), Infinity Pharma (INFI), and Pharmacylics (PCYC).
I've also written separate ASCO annual meeting stories covering new clinical data on the so-called "anti-PD-1" drugs from Bristol-Myers Squibb (BMY), Roche (RHHBY) and Merck (MRK); as well as updated results from a study of Gilead Sciences' (GILD) PI3K-delta inhibitor idelalisab.Happy abstract hunting! Abbvie and Roche Abstract No. 8520 Title: Updated results of a phase I first-in-human study of the BCL-2 inhibitor ABT-199 (GDC-0199) in patients with relapsed/refractory non-Hodgkin lymphoma (NHL). Background: BCL-2 is highly expressed in NHL, including mantle cell lymphoma (MCL), and is a promising therapeutic target as it is involved in NHL pathogenesis and mediates resistance to many cytotoxics. ABT-199 is a second generation inhibitor with 500-fold higher affinity for BCL-2. Methods: Objectives of this Ph 1 dose-escalation study include evaluations of safety, pharmacokinetics and preliminary efficacy in patients (pts) with relapsed or refractory (R/R) NHL. A single oral dose (50-400 mg) was administered followed by 6 days off drug prior to the initiation of continuous once daily dosing. Due to concerns of potential tumor lysis syndrome (TLS), a 2 to 3 wk lead-in period with step-wise escalation to the target cohort dose was implemented. Dose cohorts up to 900 mg have been evaluated to date. Results: As of January 2013, 31 pts have been enrolled (median age 68 y (range 35-85); 20 males; median prior therapies 3 (range 1-7). 13 (42%) and 4 (13%) had bulky adenopathy (greater than 5 and greater than 10 cm, respectively). The most common AEs (greater than or equal to 15% of patients) were nausea (36%), diarrhea (26%), dyspepsia, vomiting, fatigue, pyrexia and cough (16% each). Gr 3/4 AEs occurring in greater than 1 patient were anemia, neutropenia (4 pts each), and febrile neutropenia (2 pts). Two of 14 pts in cohort 5 experienced DLTs at the target dose of 600 mg: Gr 3 febrile neutropenia and Gr 4 neutropenia. Although Gr 3/4 thrombocytopenia was observed in 3 pts, it was not dose dependent. Gr 3 TLS was seen after the initial dose in 1 pt with very bulky MCL (greater than 10 cm). With a median follow-up of 5 months (range 0.5-15), 17 have discontinued: 13 due to PD, 2 due to AEs and 2 who received a BMT. Of the 29 pts evaluable for efficacy, the overall best response rate was 55% with 1 DLBCL pt achieving a CR and 15 (52%) a PR (8/8 MCL, 3/3 Waldenstrom macroglobulinemia, 2/7 follicular lymphoma and 2/7 DLBCL pts). Conclusions: ABT-199 is highly active in R/R NHL, particularly in MCL. Additional dosing and scheduling modifications are currently being explored to optimize the efficacy/safety profile of this active new agent. ABT-199 warrants further single-agent and combination trials in NHL. Ariad Pharmaceuticals Abstract No. 8031 Title: First-in-human dose-finding study of the ALK/EGFR inhibitor AP26113 in patients with advanced malignancies: Updated results. Background: AP26113 is a novel tyrosine kinase inhibitor (TKI) that potently inhibits mutant activated forms of anaplastic lymphoma kinase (ALK+) and epidermal growth factor receptor (EGFRm), and TKI-resistant forms including L1196M (ALK) and T790M (EGFR). AP26113 does not inhibit native EGFR. Methods: The dose finding phase (3+3 design) of this phase I/II open-label, multicenter study is ongoing in pts with advanced malignancies (except leukemia) refractory to available therapies or for whom no standard treatment exists. Initial dosing is orally once daily. Results: As of 14 Jan 2013, 44 pts were enrolled: 30 mg n=3, 60 mg n=3, 90 mg n=8, 120 mg n=8, 180 mg n=11, 240 mg n=9, 300 mg n=2; 64% female, median age 60 yrs; diagnoses: non-small cell lung cancer (NSCLC, n=37), other (n=7). 26 pts discontinued: 18 disease progression, 6 adverse event (AE), 2 deaths (sudden death, hypoxia; both possibly related). Most common AEs: nausea (45%), fatigue (39%), diarrhea (27%); most common grade 3/4 treatment-related AE: diarrhea (5%). 2 dose limiting toxicities observed: grade 3 ALT increase, 240 mg; grade 4 dyspnea, 300 mg. Doses less than 300 mg are being explored further. 21 pts had ALK+ history (18 NSCLC, 3 other). Among 18 evaluable ALK+ pts, 10 responded. 15 ALK+ pts had 0 (n=3) or 1 (n=12) prior ALK TKI (crizotinib); of these, 2/3 and 8/12 pts (67%) responded, including 2 complete responses. The longest response is 40 wks (ongoing). 4 of 5 ALK+ pts with untreated or progressing CNS lesions at baseline and with follow-up scans had evidence of radiographic improvement in CNS, including 1 pt resistant to crizotinib and LDK378 (overall response = stable disease). 16 pts had EGFRm history (15 NSCLC, 1 SCLC); 14 pts had greater than or equal to 1 prior EGFR TKI. Of 12 EGFRm pts with a follow-up scan, 1 pt (prior erlotinib) responded at 120 mg (duration 21 wks, ongoing), 6 pts had stable disease (2 ongoing, duration 7-31 wks). Conclusions: AP26113 has promising anti-tumor activity in ALK+ pts, with initial evidence of activity in EGFRm pts, and is generally well tolerated. Phase II will begin after the recommended phase II dose is determined, with 4 cohorts: crizotinib-naive NSCLC; crizotinib-resistant NSCLC; EGFR TKI-resistant NSCLC; other tumors. NCT01449461. Arqule Abstract No. 3508 Title: A randomized, placebo-controlled, phase I/II study of tivantinib (ARQ-197) in combination with cetuximab and irinotecan in patients (pts) with KRAS wild type (WT) metastatic colorectal cancer (CRC) who had received previous front-line systemic therapy. Background: Tivantinib (ARQ 197) selectively inhibits the MET receptor tyrosine kinase, which is implicated in tumor cell migration, invasion, and metastasis. Resistance to EGFR inhibitors has been associated with activation of alternative pathways including MET. Methods: Pts with advanced KRAS WT CRC that progressed on or after 1 prior line of chemotherapy and no previous treatment with an EGFR inhibitor were eligible. Pts were randomized 1:1 to receive cetuximab (500 mg/m2) and irinotecan (180 mg/m2) on days 1 and 15 every 28 days, plus oral tivantinib (360 mg twice daily BID or placebo. The primary endpoint was progression-free survival (PFS); additional endpoints include safety, objective response rate, overall survival (OS) and exploratory biomarker analyses. Results: Between Jul 2010 and Feb 2012, 122 pts were randomized; 117 pts were eligible for analysis (60 tivantinib, 57 placebo). Mean age was 57 years (range, 27-79 years); ECOG PS 0/1 55%/45%; and 81% received prior oxaliplatin. Median PFS was 8.3 months in the tivantinib arm vs 7.3 months in the placebo arm (hazard ratio
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