On November 1, 2017 Seattle Genetics, Inc. (Nasdaq: SGEN) reported that 18 abstracts featuring data from the broad ADCETRIS (brentuximab vedotin) development program have been accepted for presentation, including a plenary presentation, at the 58th American Society of Hematology (ASH) (Free ASH Whitepaper) Annual Meeting and Exposition taking place from December 9-12, 2017 in Atlanta, Georgia (Press release, Seattle Genetics, NOV 1, 2017, View Source [SID1234521404]). ADCETRIS is an antibody-drug conjugate (ADC) directed to CD30, which is expressed on the surface of Hodgkin lymphoma cells and several types of non-Hodgkin lymphoma. ADCETRIS is being evaluated globally as the foundation of care for CD30-expressing lymphomas in more than 70 corporate- and investigator-sponsored clinical trials.
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Data accepted for presentation at the ASH (Free ASH Whitepaper) Annual Meeting include the following:
Data from the phase 3 ECHELON-1 clinical trial evaluating ADCETRIS in combination with chemotherapy in frontline advanced classical Hodgkin lymphoma patients will be featured in the Plenary Scientific Session on Sunday, December 10, 2017 from 2:00 – 4:00 p.m. ET. Based on the positive results from the ECHELON-1 trial, the U.S. Food and Drug Administration (FDA) granted Breakthrough Therapy Designation to ADCETRIS in combination with chemotherapy for the frontline treatment of patients with advanced classical Hodgkin lymphoma. Seattle Genetics expects to submit in the fourth quarter of 2017 a supplemental Biologics License Application (BLA) to the FDA for approval of ADCETRIS in frontline advanced classical Hodgkin lymphoma.
Numerous oral and poster presentations highlighting additional progress within the ADCETRIS development program including:
Updated durability results from the phase 3 ALCANZA clinical trial in patients with CD30-expressing mycosis fungoides and primary cutaneous anaplastic large cell lymphoma, the most common subtypes of cutaneous T-cell lymphoma (CTCL). Based on the positive results from the ALCANZA trial, a supplemental BLA for ADCETRIS in CTCL was accepted for filing by the FDA. The FDA granted Priority Review for the application and the Prescription Drug User Fee Act (PDUFA) target action date is December 16, 2017. ADCETRIS previously received FDA Breakthrough Therapy Designation in this setting.
Updated results from a phase 1/2 study of ADCETRIS in combination with Opdivo (nivolumab) among patients with relapsed or refractory Hodgkin lymphoma
Final five-year survival and durability results in patients with CD30-expressing peripheral T-cell lymphomas who received ADCETRIS with cyclophosphamide, hydroxydaunorubicin, and prednisone (CHP) as frontline therapy
“At this year’s ASH (Free ASH Whitepaper) Annual Meeting, we will present data from 18 abstracts, highlighting several ADCETRIS clinical program advancements that support our plans to establish ADCETRIS as the foundation of care for CD30-expressing lymphomas,” said Clay Siegall, Ph.D., President and Chief Executive Officer of Seattle Genetics. “Importantly, the results of the phase 3 ECHELON-1 clinical trial evaluating ADCETRIS combination therapy in frontline advanced Hodgkin lymphoma patients was selected from over 6,000 abstracts submitted to be featured in the Plenary Scientific Session. These data are the basis for our planned supplemental biologics license application to the FDA requesting approval of ADCETRIS in this setting. The breadth of data being presented with ADCETRIS in CD30-expressing lymphomas demonstrates the power of antibody-drug conjugates with a goal of improving patient outcomes.”
ADCETRIS is currently not approved for the treatment of frontline Hodgkin lymphoma, CTCL, or as combination therapy for Hodgkin lymphoma or non-Hodgkin lymphoma.
Multiple corporate and investigator presentations will be featured at ASH (Free ASH Whitepaper). Abstracts can be found at www.hematology.org and include the following:
Saturday, December 9, 2017
Updated analyses of the international, open-label, randomized, phase 3 ALCANZA study: longer-term evidence for superiority of brentuximab vedotin versus methotrexate or bexarotene for CD30-positive cutaneous T-cell lymphoma (Abstract #1509, poster presentation)
A pilot study of weekly brentuximab vedotin in patients with CD30+ malignancies resistant to every 3 week brentuximab vedotin (Abstract #1528, poster presentation)
Brentuximab vedotin with R-CHP chemotherapy as frontline treatment for patients with CD30 positive primary mediastinal large B-cell, diffuse large B-cell, and grey zone lymphomas: results of a phase I/II multisite trial (Abstract #191, oral presentation at 3:00 p.m. ET)
Patient-reported distress in Hodgkin lymphoma patients on active therapy vs. long-term survivors (Abstract #2173, poster presentation)
Real world clinical and economic burden of patients with Hodgkin lymphoma who fail frontline therapy in the US (Abstract #2128, poster presentation)
Sunday, December 10, 2017
Brentuximab vedotin plus doxorubicin, vinblastine, dacarbazine (A+AVD) as frontline therapy demonstrates superior modified progression-free survival versus ABVD in patients with previously untreated stage III or IV Hodgkin lymphoma (HL): the phase 3 ECHELON-1 study (Plenary Scientific Session presentation from 2:00 – 4:00 p.m. ET)
Five-year survival results: frontline brentuximab vedotin in combination with CHP in patients with CD30-expressing peripheral T-cell lymphomas (Abstract #2790, poster presentation)
Radiographic and high-throughput sequencing (HTS)-based response assessment after brentuximab vedotin plus ifosfamide, carboplatin, and etoposide (ICE) for relapsed/refractory classical Hodgkin lymphoma: updated results of a phase I/II trial (Abstract #2806, poster presentation)
Patient and physician preferences for front-line treatment of advanced stage Hodgkin lymphoma (Abstract #4082, poster presentation)
Changes in serum TARC predict PET response among pediatric patients with relapsed or refractory Hodgkin lymphoma treated with brentuximab vedotin and gemcitabine: a report from the Children’s Oncology Group (Abstract #2798, poster presentation)
Phase 2 Study of Brentuximab Vedotin in Patients with Advanced Systemic Mastocytosis (Abstract #2909, poster presentation)
Monday, December 11, 2017
Results from a phase 1/2 study of brentuximab vedotin in combination with nivolumab in patients with relapsed or refractory Hodgkin lymphoma (Abstract #649, oral presentation at 10:30 a.m. ET)
Sequential brentuximab vedotin before and after adriamycin, vinblastine, and dacarbazine (A-VAD-A) for older patients with untreated Hodgkin lymphoma: final results from a multicenter phase II study (Abstract #733, oral presentation at 2:45 p.m. ET)
About ADCETRIS
ADCETRIS is an antibody-drug conjugate (ADC) directed to CD30 and is being evaluated broadly in more than 70 clinical trials, including four phase 3 studies: the ECHELON-1 trial in frontline classical Hodgkin lymphoma from which positive top-line results were recently reported and the FDA granted Breakthrough Therapy Designation in this setting, the ongoing ECHELON-2 trial in frontline mature T-cell lymphomas, the completed ALCANZA trial in cutaneous T-cell lymphoma that supported the supplemental BLA with a Prescription Drug User Fee Act (PDUFA) target action date of December 16, 2017, and the recently initiated CHECKMATE 812 trial of ADCETRIS in combination with Opdivo (nivolumab) for relapsed/refractory Hodgkin lymphoma.
ADCETRIS is an ADC comprising an anti-CD30 monoclonal antibody attached by a protease-cleavable linker to a microtubule disrupting agent, monomethyl auristatin E (MMAE), utilizing Seattle Genetics’ proprietary technology. The ADC employs a linker system that is designed to be stable in the bloodstream but to release MMAE upon internalization into CD30-expressing tumor cells.
ADCETRIS for intravenous injection has received FDA approval for three indications: (1) regular approval for the treatment of patients with classical Hodgkin lymphoma after failure of autologous hematopoietic stem cell transplantation (auto-HSCT) or after failure of at least two prior multi-agent chemotherapy regimens in patients who are not auto-HSCT candidates, (2) regular approval for the treatment of classical Hodgkin lymphoma patients at high risk of relapse or progression as post-auto-HSCT consolidation, and (3) accelerated approval for the treatment of patients with systemic anaplastic large cell lymphoma (sALCL) after failure of at least one prior multi-agent chemotherapy regimen. The sALCL indication is approved under accelerated approval based on overall response rate. Continued approval for the sALCL indication may be contingent upon verification and description of clinical benefit in confirmatory trials.
Health Canada granted ADCETRIS approval with conditions for relapsed or refractory Hodgkin lymphoma and sALCL in 2013, and non-conditional approval for post-ASCT consolidation treatment of Hodgkin lymphoma patients at increased risk of relapse or progression.
ADCETRIS was granted conditional marketing authorization by the European Commission in October 2012 for two indications: (1) for the treatment of adult patients with relapsed or refractory CD30-positive Hodgkin lymphoma following autologous stem cell transplant (ASCT), or following at least two prior therapies when ASCT or multi-agent chemotherapy is not a treatment option, and (2) the treatment of adult patients with relapsed or refractory sALCL. The European Commission extended the current conditional marketing authorization of ADCETRIS and approved ADCETRIS for the treatment of adult patients with CD30-positive Hodgkin lymphoma at increased risk of relapse or progression following ASCT.
ADCETRIS has received marketing authorization by regulatory authorities in 68 countries for relapsed or refractory Hodgkin lymphoma and sALCL. See important safety information below.
Seattle Genetics and Takeda are jointly developing ADCETRIS. Under the terms of the collaboration agreement, Seattle Genetics has U.S. and Canadian commercialization rights and Takeda has rights to commercialize ADCETRIS in the rest of the world. Seattle Genetics and Takeda are funding joint development costs for ADCETRIS on a 50:50 basis, except in Japan where Takeda is solely responsible for development costs.