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Attend this session at the
2017 ASCO Annual Meeting!


Session: Melanoma/Skin Cancers

Type: Oral Abstract Session

Time: Sunday June 4, 8:00 AM to 11:00 AM

Location: Arie Crown Theater

Five-year overall survival (OS) update from a phase II, open-label trial of dabrafenib (D) and trametinib (T) in patients (pts) with BRAF V600–mutant unresectable or metastatic melanoma (MM).

Sub-category:
Advanced Disease

Category:
Melanoma/Skin Cancers

Meeting:
2017 ASCO Annual Meeting

Abstract No:
9505

Citation:
J Clin Oncol 35, 2017 (suppl; abstr 9505)

Author(s): Georgina V. Long, Zeynep Eroglu, Jeffrey R. Infante, Sapna Pradyuman Patel, Adil Daud, Douglas Buckner Johnson, Rene Gonzalez, Richard Kefford, Omid Hamid, Lynn Mara Schuchter, Jonathan S. Cebon, William Howard Sharfman, Robert R. McWilliams, Mario Sznol, Jeffrey S. Weber, Bijoyesh Mookerjee, Eduard Gasal, Suman Redhu, Keith T. Flaherty; University of Sydney, Sydney, Australia; Moffitt Cancer Center, Tampa, FL; Tennessee Onc, Nashville, TN; The University of Texas MD Anderson Cancer Center, Houston, TX; University of California, San Francisco, San Francisco, CA; Vanderbilt University Ingram Cancer Center, Nashville, TN; University of Colorado, Denver, CO; Westmead Hospital and Macquarie University, Sydney, Australia; The Angeles Clinic and Research Institute, Los Angeles, CA; University of Pennsylvania, Philadelphia, PA; Ludwig Institute for Cancer Research, Melbourne, Australia; Johns Hopkins Kimmel Cancer Center, Baltimore, MD; Mayo Clinic, Rochester, MN; Yale University, New Haven, CT; NYU Langone Medical Center, New York, NY; Novartis Pharmaceuticals Corporation, East Hanover, NJ; Dana-Farber Cancer Institute/Harvard Cancer Center, Boston, MA

Abstract Disclosures

Abstract:

Background: D (BRAF inhibitor) + T (MEK inhibitor) combination therapy is associated with rapid clinical responses and has improved clinical outcomes in pts with BRAFV600–mutantMM, but long-term (˃ 3 y) clinical efficacy and safety data are limited. The longest follow-up to date of a randomized trial evaluating D+T at the approved dose (150 mg BID/2 mg QD [150/2]) was of the phase II study BRF113220 (part C; median, 45.6 mo) in which durable outcomes were achieved in some pts with BRAFV600–mutantMM (3-y OS, 38%). Here, we report updated 5-y landmark analyses to further characterize the impact of D+T in MM. Methods: Pts with BRAFV600–mutant mm enrolled in BRF113220 part C (NCT01072175) were randomized 1:1:1 to receive monotherapy D (150 mg BID), D+T (150 mg BID/1 mg QD), or D+T (150/2). Pts who progressed on D alone could cross over to the D+T 150/2 arm. Pt disposition, pt demographics, and 4- and 5-y efficacy and safety were analyzed for both the D-alone and D+T (approved 150/2 dose) arms. Results: This updated analysis represents an additional ≈ 2 y of follow-up (D and D+T arms; n = 54 each). As of 13 Oct 2016, 45 pts (83%) on D alone had crossed over to D+T. 20 pts were ongoing (D, n = 7 [13%]; D+T, n = 13 [24%]); 80% of D pts and 70% of D+T pts had died. D+T OS remained superior to D alone. The 4- and 5-y OS rates with D+T were 30% and 28%, respectively, demonstrating a stabilization of the OS curve. The PFS curve for D+T also remained stable (4- and 5-y: both 13%). Consistent with earlier results, the best OS for pts who received D+T was seen in pts with normal LDH (5-y, 45%) and normal LDH with disease in < 3 organ sites (5-y, 51%). At the 5-y landmark, 1 additional pt who received D+T improved from a partial to a complete response. Additional follow-up revealed no new safety signals with D+T. Detailed analyses of D crossover pts, responders, and post-progression therapy will be presented. Conclusions: This longest follow-up to date of BRAF + MEK inhibitor combination therapy in pts with BRAFV600–mutant mm revealed stable OS and PFS lasting ≥ 5 y with consistent tolerability. These results demonstrate that some pts with mm can achieve durable benefit with D+T therapy. Clinical trial information: NCT01072175

 
Other Abstracts in this Sub-Category:

 

1. A phase II study of glembatumumab vedotin (GV), an antibody-drug conjugate (ADC) targeting gpNMB, in advanced melanoma.

Meeting: 2017 ASCO Annual Meeting Abstract No: 109 First Author: Patrick Alexander Ott
Category: Melanoma/Skin Cancers - Advanced Disease

 

2. REGN2810: A fully human anti-PD-1 monoclonal antibody, for patients with unresectable locally advanced or metastatic cutaneous squamous cell carcinoma (CSCC)—Initial safety and efficacy from expansion cohorts (ECs) of phase I study.

Meeting: 2017 ASCO Annual Meeting Abstract No: 9503 First Author: Kyriakos P. Papadopoulos
Category: Melanoma/Skin Cancers - Advanced Disease

 

3. Long-term outcomes in patients (pts) with ipilimumab (ipi)-naive advanced melanoma in the phase 3 KEYNOTE-006 study who completed pembrolizumab (pembro) treatment.

Meeting: 2017 ASCO Annual Meeting Abstract No: 9504 First Author: Caroline Robert
Category: Melanoma/Skin Cancers - Advanced Disease

 

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