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    4503   JP3942400007

ASTELLAS PHARMA INC.

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Astellas Pharma : and Seagen Announce Submission of Two Supplemental Biologics License Applications to the U.S. FDA for PADCEV in Locally Advanced or Metastatic Urothelial Cancer

02/19/2021 | 08:37am EDT

TOKYO - Astellas Pharma Inc. (TSE: 4503, President and CEO: Kenji Yasukawa, Ph.D., 'Astellas') and Seagen Inc. today announced completion of submissions for two supplemental Biologics License Applications to the U.S. Food and Drug Administration (FDA) for PADCEV.

One submission, based on the phase 3 EV-301 trial, seeks to convert PADCEV's accelerated approval to regular approval. The second submission, based on the pivotal trial EV-201's second cohort, requests an expansion of the current label to include patients with locally advanced or metastatic urothelial cancer who have been previously treated with a PD-1/L1 inhibitor and are ineligible for cisplatin.

The FDA is reviewing both applications under the Real-Time Oncology Review (RTOR) pilot program. The RTOR program aims to explore a more efficient review process to ensure that safe and effective treatments are available to patients as early as possible.

'The FDA's review of our applications under Real-Time Oncology Review supports our efforts to expand PADCEV's availability as a treatment option for more patients as quickly as possible,' said Andrew Krivoshik, M.D., Ph.D., Senior Vice President and Oncology Therapeutic Area Head, Astellas. 'Locally advanced or metastatic urothelial cancer is an aggressive disease with limited treatment options.'

The sBLA for regular approval of PADCEV in the U.S. is supported by data from the global EV-301 phase 3 confirmatory trial, which compared PADCEV to chemotherapy in adult patients with locally advanced or metastatic urothelial cancer who were previously treated with platinum-based chemotherapy and a PD-1/L1 inhibitor. The trial's primary endpoint was overall survival of patients treated with PADCEV vs. chemotherapy, and full results were presented at the 2021 American Society of Clinical Oncology Genitourinary Cancers Symposium (ASCO GU) and published in the New England Journal of Medicine.[1]

The second submission, for a label expansion in the U.S., is based on results from the second cohort of EV-201, a pivotal phase 2 clinical trial evaluating PADCEV in patients with locally advanced or metastatic urothelial cancer who had received prior immunotherapy treatment but were not eligible for cisplatin. The trial's primary endpoint was objective response rate, and full results were presented at ASCO GU.[2]

'Advanced bladder cancer patients urgently need more treatment options,' said Roger Dansey, M.D., Chief Medical Officer, Seagen. 'Based on recently presented clinical trial results, PADCEV could address a significant unmet need for more patients with advanced urothelial cancer after initial immunotherapy treatment.'

In 2019 PADCEV received accelerated approval in the U.S. for the treatment of adult patients with locally advanced or metastatic urothelial cancer who have previously received a PD-1/L1 inhibitor and a platinum-containing chemotherapy before (neoadjuvant) or after (adjuvant) surgery in a locally advanced or metastatic urothelial cancer setting. PADCEV is currently only approved for use in the U.S.

About the EV-301 Trial

The EV-301 trial (NCT03474107) is a global, multicenter, open-label, randomized phase 3 trial designed to evaluate enfortumab vedotin versus physician's choice of chemotherapy (docetaxel, paclitaxel or vinflunine) in approximately 600 patients with locally advanced or metastatic urothelial cancer who were previously treated with a PD-1/L1 inhibitor and platinum-based therapies. The primary endpoint is overall survival and secondary endpoints include progression-free survival, overall response rate, duration of response and disease control rate, as well as assessment of safety/tolerability and quality-of-life parameters.

About the EV-201 Trial

The EV-201 trial (NCT03219333) is a single-arm, dual-cohort, pivotal phase 2 clinical trial of enfortumab vedotin for patients with locally advanced or metastatic urothelial cancer who have been previously treated with a PD-1 or PD-L1 inhibitor, including those who have also been treated with a platinum-containing chemotherapy (cohort 1) and those who have not received a platinum-containing chemotherapy in this setting and who are ineligible for cisplatin (cohort 2). The trial enrolled 128 patients in cohort 1 and 91 patients in cohort 2 at multiple centers internationally. The primary endpoint is confirmed objective response rate per blinded independent central review. Secondary endpoints include assessments of duration of response, disease control rate, progression-free survival, overall survival, safety and tolerability.

About Urothelial Cancer

Urothelial cancer is the most common type of bladder cancer (90 percent of cases) and can also be found in the renal pelvis (where urine collects inside the kidney), ureter (tube that connects the kidneys to the bladder) and urethra.[3] Globally, approximately 549,000 new cases of bladder cancer and 200,000 deaths are reported annually.[4]

About PADCEV (enfortumab vedotin-ejfv)

PADCEV was approved by the U.S. Food and Drug Administration (FDA) in December 2019 and is indicated for the treatment of adult patients with locally advanced or metastatic urothelial cancer who have previously received a programmed death receptor-1 (PD-1) or programmed death-ligand 1 (PD-L1) inhibitor, and a platinum-containing chemotherapy before (neoadjuvant) or after (adjuvant) surgery or in a locally advanced or metastatic setting. PADCEV was approved under the FDA's Accelerated Approval Program based on tumor response rate. Continued approval for this indication may be contingent upon verification and description of clinical benefit in confirmatory trials.[5]

PADCEV 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.5,[6] 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).5 PADCEV is co-developed by Astellas and Seagen.

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.

About Seagen

Seagen Inc. is a global biotechnology company that discovers, develops and commercializes transformative cancer medicines to make a meaningful difference in people's lives. Seagen is headquartered in the Seattle, Washington area, and has locations in California, Canada, Switzerland and the European Union.

About the Astellas and Seagen Collaboration

Astellas and Seagen are co-developing enfortumab vedotin under a collaboration that was entered into in 2007 and expanded in 2009.

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.

Seagen Forward Looking Statements

Certain statements made in this press release are forward looking, such as those, among others, relating to the potential conversion of PADCEV's current accelerated approval in the U.S. to regular approval and the potential expansion of the current PADCEV label to include patients with locally advanced or metastatic urothelial cancer who have been previously treated with a PD-1/L1 inhibitor and are ineligible for cisplatin, and the therapeutic potential of PADCEV, including its efficacy, safety and therapeutic uses. Actual results or developments may differ materially from those projected or implied in these forward-looking statements. Factors that may cause such a difference include, without limitation, the possibility that the sBLA submissions based on the EV-301 and EV-201 second cohort clinical trials may not be accepted for filing by, or ultimately approved by, the FDA in a timely manner or at all; that the results of the EV-301 clinical trial may not be sufficient to convert PADCEV's accelerated approval in the U.S. to regular approval and that the results of the second cohort of the EV-201 clinical trial may not be sufficient to support the requested label expansion; that, even if PADCEV receives regular approval and even if the PADCEV label is expanded based on the results of the second cohort of the EV-201 clinical trial, the product labeling may not be as broad or desirable as requested or anticipated and that setbacks in the development and commercialization of PADCEV could occur as a result of the difficulty and uncertainty of pharmaceutical product development, the risk of adverse events or safety signals, the failure of ongoing and subsequent clinical trials to establish sufficient efficacy, or as a result of adverse regulatory actions. More information about the risks and uncertainties faced by Seagen is contained under the caption 'Risk Factors' included in the company's Annual Report on Form 10-K for the year ended December 31, 2020 filed with the Securities and Exchange Commission. Seagen disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Contact:

Chris Goldrick

Tel: (847) 224-3014

Email: chris.goldrick@astellas.com

(C) 2021 Electronic News Publishing, source ENP Newswire

Stocks mentioned in the article
ChangeLast1st jan.
ASTELLAS PHARMA INC. -0.67% 1863.5 End-of-day quote.16.91%
SEAGEN INC. -1.54% 166.35 Delayed Quote.-3.41%
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Kenji Yasukawa President, CEO & Representative Director
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