PADCEV® (enfortumab vedotin-ejfv) and KEYTRUDA® (pembrolizumab) Significantly Improve Overall Survival and Progression-Free Survival in Patients With Previously Untreated Advanced Bladder Cancer in Pivotal Phase 3 EV-302 Trial
- The Phase 3 EV-302 trial showed that the combination of PADCEV and KEYTRUDA improved overall survival (OS) and progression-free survival (PFS) compared to chemotherapy
- The results have the potential to be practice changing and offer a new standard of care for first-line metastatic bladder cancer
- None.
– Trial results to be submitted for presentation at upcoming medical meeting –
The EV-302 study met its dual primary endpoints of overall survival (OS) and progression-free survival (PFS), compared to chemotherapy. An Independent Data Monitoring Committee determined that OS crossed the pre-specified efficacy boundary at interim analysis. The safety results of the combination are consistent with those of enfortumab vedotin in combination with pembrolizumab previously reported in cisplatin-ineligible patients with la/mUC.
Please see Important Safety Information at the end of this press release, including BOXED WARNING for PADCEV (enfortumab vedotin-ejfv).
Roger Dansey, M.D., President, Research and Development, Seagen
“This study has the potential to be practice changing and offer a new standard of care for first-line metastatic bladder cancer. We look forward to presenting the results at an upcoming medical conference and discussing with regulators in order to get this medicine to patients as soon as possible.”
Ahsan Arozullah, M.D., M.P.H., Senior Vice President, Head of Oncology Development, Astellas
“We are thrilled that the topline results of the EV-302 study demonstrated that the combination of enfortumab vedotin and pembrolizumab improved the dual primary endpoints of OS and PFS. Patients living with metastatic urothelial cancer are in dire need of additional treatment options and this combination has the potential to advance the standard of care. We are extremely grateful to all of the patients who participated in this trial.”
Thomas Powles, M.R.C.P., M.D., Professor of Genitourinary Oncology at Queen Mary University of
“Over two hundred thousand deaths from urothelial cancer are reported worldwide annually, making it a major cause of morbidity and mortality. The topline results from EV-302 are encouraging for patients with advanced-stage urothelial cancer, which is aggressive and associated with devastating outcomes.”
The EV-302 trial is an open-label, randomized, controlled Phase 3 study, evaluating enfortumab vedotin in combination with pembrolizumab versus chemotherapy in patients with previously untreated la/mUC. In this study, patients were randomized to receive either enfortumab vedotin in combination with pembrolizumab or chemotherapy. The dual primary endpoints of this trial are OS and PFS per RECIST v1.1 by blinded independent central review (BICR). Full details will be reported at an upcoming scientific congress.
The EV-302 trial is intended to serve as the basis for global submissions and as the confirmatory trial for the
About Bladder and Urothelial Cancer
- Urothelial cancer, or bladder cancer, begins in the urothelial cells, which line the urethra, bladder, ureters, renal pelvis, and some other organs.1
- If bladder cancer has spread to surrounding organs or muscles, it is called locally advanced disease. If the cancer has spread to other parts of the body, it is called metastatic disease. 2
- Globally, approximately 573,000 new cases of bladder cancer and 212,000 deaths are reported annually.3
-
It is estimated that approximately 82,290 people in the
U.S. will be diagnosed with bladder cancer in 2023.4 -
It is estimated that approximately 200,000 people in
Europe and 24,000 people inJapan are diagnosed with bladder cancer annually. 5,6 -
Urothelial cancer accounts for
90% of all bladder cancers and can also be found in the renal pelvis, ureter, and urethra.2 -
Approximately
12% of cases are locally advanced or metastatic urothelial cancer at diagnosis.7
Ongoing Investigational Trials
The EV-302 trial (NCT04223856) is an open-label, randomized, controlled Phase 3 study, evaluating the impact of treatment with enfortumab vedotin in combination with pembrolizumab versus chemotherapy in patients with previously untreated locally advanced or metastatic urothelial cancer (la/mUC) who were eligible for cisplatin- or carboplatin-containing chemotherapy regardless of PD-L1 status.
The EV-103 trial (NCT03288545) is an ongoing, multi-cohort, open-label, multicenter Phase 1b/2 study investigating enfortumab vedotin alone or in combination with pembrolizumab and/or chemotherapy in first- or second-line settings in patients with la/mUC and in patients with muscle-invasive bladder cancer (MIBC).
Enfortumab vedotin in combination with pembrolizumab is being investigated in an extensive program in multiple stages of urothelial cancer, including two Phase 3 clinical trials in MIBC in EV-304 (NCT04700124, also known as KEYNOTE-B15) and EV-303 (NCT03924895, also known as KEYNOTE-905). The use of enfortumab vedotin in combination with pembrolizumab in second-line urothelial cancer and in MIBC has not been proven safe or effective.
About PADCEV® (enfortumab vedotin-ejfv)
PADCEV (enfortumab vedotin-ejfv) is a first-in-class antibody-drug conjugate (ADC) that is directed against Nectin-4, a protein located on the surface of cells and highly expressed in bladder cancer.8 Nonclinical data suggest the anticancer activity of PADCEV is due to its binding to Nectin-4-expressing cells, followed by the internalization and release of the anti-tumor agent monomethyl auristatin E (MMAE) into the cell, which result in the cell not reproducing (cell cycle arrest) and in programmed cell death (apoptosis).9
PADCEV (enfortumab vedotin-ejfv)
BOXED WARNING: SERIOUS SKIN REACTIONS
-
PADCEV can cause severe and fatal cutaneous adverse reactions including
Stevens -Johnson syndrome (SJS) and Toxic Epidermal Necrolysis (TEN), which occurred predominantly during the first cycle of treatment, but may occur later. - Closely monitor patients for skin reactions.
- Immediately withhold PADCEV and consider referral for specialized care for suspected SJS or TEN or severe skin reactions.
- Permanently discontinue PADCEV in patients with confirmed SJS or TEN; or Grade 4 or recurrent Grade 3 skin reactions.
Indication
PADCEV®, as a single agent, is indicated for the treatment of adult patients with locally advanced or metastatic urothelial cancer (mUC) who:
- have previously received a programmed death receptor-1 (PD-1) or programmed death-ligand 1 (PD-L1) inhibitor and platinum-containing chemotherapy, or
- are ineligible for cisplatin-containing chemotherapy and have previously received one or more prior lines of therapy.1
PADCEV, in combination with pembrolizumab, is indicated for the treatment of adult patients with locally advanced or metastatic urothelial cancer (mUC) who are not eligible for cisplatin-containing chemotherapy.1
This indication is approved under accelerated approval based on tumor response rate and durability of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in the confirmatory trials.
Important Safety Information
Warnings and Precautions
Skin reactions Severe cutaneous adverse reactions, including fatal cases of SJS or TEN occurred in patients treated with PADCEV. SJS and TEN occurred predominantly during the first cycle of treatment but may occur later. Skin reactions occurred in
When PADCEV was given in combination with pembrolizumab, the incidence of skin reactions, including severe events, occurred at a higher rate. Skin reactions occurred in
Hyperglycemia and diabetic ketoacidosis (DKA). Hyperglycemia and diabetic ketoacidosis (DKA), including fatal events, occurred in patients with and without pre-existing diabetes mellitus, treated with PADCEV. Patients with baseline hemoglobin A1C ≥
Pneumonitis/Interstitial Lung Disease (ILD) Severe, life-threatening or fatal pneumonitis/ILD occurred in patients treated with PADCEV. In clinical trials of PADCEV as a single agent,
Peripheral neuropathy (PN) Peripheral neuropathy occurred in
Ocular disorders were reported in
Infusion site extravasation Skin and soft tissue reactions secondary to extravasation have been observed after administration of PADCEV. Of the 753 patients treated with PADCEV as a single agent in clinical trials,
Embryo-fetal toxicity PADCEV can cause fetal harm when administered to a pregnant woman. Advise patients of the potential risk to the fetus. Advise female patients of reproductive potential to use effective contraception during PADCEV treatment and for 2 months after the last dose. Advise male patients with female partners of reproductive potential to use effective contraception during treatment with PADCEV and for 4 months after the last dose.
Adverse Reactions
Most common adverse reactions, including laboratory abnormalities (≥
Rash, aspartate aminotransferase increased, glucose increased, creatinine increased, fatigue, peripheral neuropathy, lymphocytes decreased, alopecia, decreased appetite, hemoglobin decreased, diarrhea, sodium decreased, nausea, pruritus, phosphate decreased, dysgeusia, alanine aminotransferase increased, anemia, albumin decreased, neutrophils decreased, urate increased, lipase increased, platelets decreased, weight decreased and dry skin.
EV-301 Study: 296 patients previously treated with a PD-1/L1 inhibitor and platinum-based chemotherapy.
Serious adverse reactions occurred in
EV-201, Cohort 2 Study: 89 patients previously treated with a PD-1/L1 inhibitor and not eligible for cisplatin-based chemotherapy.
Serious adverse reactions occurred in
EV-103 Study: 121 patients with previously untreated locally advanced or metastatic urothelial cancer who were not eligible for cisplatin-containing chemotherapy (PADCEV in combination with pembrolizumab)
The most common adverse reactions, including laboratory abnormalities (≥
Serious adverse reactions occurred in
Drug Interactions
Effects of other drugs on PADCEV (Dual P-gp and Strong CYP3A4 Inhibitors)
Concomitant use with dual P-gp and strong CYP3A4 inhibitors may increase unconjugated monomethyl auristatin E exposure, which may increase the incidence or severity of PADCEV toxicities. Closely monitor patients for signs of toxicity when PADCEV is given concomitantly with dual P-gp and strong CYP3A4 inhibitors.
Specific Populations
Lactation Advise lactating women not to breastfeed during treatment with PADCEV and for at least 3 weeks after the last dose.
Hepatic impairment Avoid the use of PADCEV in patients with moderate or severe hepatic impairment.
For more information, please see the full Prescribing Information including BOXED WARNING for PADCEV here.
About Seagen
Founded 25 years ago, Seagen Inc. is a global biotechnology company that discovers, develops, manufactures and commercializes targeted cancer therapeutics, with antibody-drug conjugates (ADCs) at our core. Our colleagues work together with urgency to improve and extend the lives of people living with cancer. An ADC technology trailblazer, approximately one-third of FDA-approved and marketed ADCs use Seagen technology. Seagen is headquartered in
About Astellas
Astellas Pharma Inc. is a pharmaceutical company conducting business in more than 70 countries around the world. We are promoting the Focus Area Approach that is designed to identify opportunities for the continuous creation of new drugs to address diseases with high unmet medical needs by focusing on Biology and Modality. Furthermore, we are also looking beyond our foundational Rx focus to create Rx+® healthcare solutions that combine our expertise and knowledge with cutting-edge technology in different fields of external partners. Through these efforts, Astellas stands on the forefront of healthcare change to turn innovative science into VALUE for patients. For more information, please visit our website at https://www.astellas.com/en.
About the Seagen, Astellas and Merck Collaboration
Seagen and Astellas entered a clinical collaboration agreement with Merck to evaluate the combination of Seagen’s and Astellas’ PADCEV® (enfortumab vedotin-ejfv) and Merck’s KEYTRUDA® (pembrolizumab) in patients with previously untreated metastatic urothelial cancer. KEYTRUDA is a registered trademark of Merck Sharp & Dohme Corp., a subsidiary of Merck & Co., Inc.,
Seagen Forward-Looking Statements
Certain statements made in this press release are forward-looking, such as those, among others, relating to the therapeutic potential of enfortumab vedotin, alone or in combination, and its possible efficacy, safety and therapeutic uses; the potential for results from the EV-302 trial to change practice, offer a new standard of care, or serve as the basis for global submissions and as the confirmatory trial for the
Astellas Cautionary Notes
In this press release, statements made with respect to current plans, estimates, strategies and beliefs and other statements that are not historical facts are forward-looking statements about the future performance of Astellas. These statements are based on management’s current assumptions and beliefs in light of the information currently available to it and involve known and unknown risks and uncertainties. A number of factors could cause actual results to differ materially from those discussed in the forward-looking statements. Such factors include, but are not limited to: (i) changes in general economic conditions and in laws and regulations, relating to pharmaceutical markets, (ii) currency exchange rate fluctuations, (iii) delays in new product launches, (iv) the inability of Astellas to market existing and new products effectively, (v) the inability of Astellas to continue to effectively research and develop products accepted by customers in highly competitive markets, and (vi) infringements of Astellas’ intellectual property rights by third parties.
Information about pharmaceutical products (including products currently in development), which is included in this press release, is not intended to constitute an advertisement or medical advice.
1 National Cancer Institute. What is bladder cancer? https://www.cancer.gov/types/bladder#:~:text=Types%20of%20bladder%20cancer,bladder%20cancers%20are%20urothelial%20carcinomas. Accessed 08-10-2023.
2 American Society of Clinical Oncology. Bladder cancer: introduction (12-2021). https://www.cancer.net/cancer-types/bladder-cancer/introduction. Accessed 08-10-2023.
3 International Agency for Research on Cancer. Cancer Today: bladder globocan 2020 fact sheet (12-2020). https://gco.iarc.fr/today/data/factsheets/cancers/30-Bladder-fact-sheet.pdf. Accessed 08-10-2023.
4 Siegel RL, Miller KD, Wagle NS, Jemal A. Cancer statistics, 2023. CA Cancer J Clin 2023;73(1):17-48.
5 Cancer Information Service, Cancer Statistics in
6 Bladder cancer: The forgotten cancer. Uroweb. (n.d.). https://uroweb.org/news/bladder-cancer-the-forgotten-cancer. Accessed September 15, 2023.
7 National Cancer Institute. Cancer stat facts: bladder cancer. https://seer.cancer.gov/statfacts/html/urinb.html. Accessed 08-10-2023.
8 Challita-Eid PM, Satpayev D, Yang P, et al. Enfortumab vedotin antibody-drug conjugate targeting nectin-4 is a highly potent therapeutic agent in multiple preclinical cancer models. Cancer Res 2016;76(10):3003-13.
9 PADCEV [package insert].
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