NEW YORK, NY, USA I October 10, 2024
I
Pfizer Inc.
(NYSE: PFE) today announced positive topline results from the final prespecified overall survival (OS) analysis of the TALAPRO-2 study of TALZENNA
®
(talazoparib), an oral poly ADP-ribose polymerase (PARP) inhibitor, in combination with XTANDI
®
(enzalutamide), an androgen receptor pathway inhibitor (ARPI), in patients with metastatic castration-resistant prostate cancer (mCRPC). Results showed a statistically significant and clinically meaningful improvement in the final OS in all-comers (cohort 1) as well as in those patients with homologous recombination repair (HRR) gene-mutated mCRPC (cohort 2), compared to XTANDI alone.
“The TALAPRO-2 results showed that TALZENNA plus XTANDI is the first and only PARP inhibitor in combination with an ARPI to significantly improve survival in patients with metastatic castration-resistant prostate cancer, regardless of mutation status,” said Roger Dansey, M.D., Chief Development Officer, Oncology, Pfizer. “Pfizer is dedicated to advancing scientific breakthroughs in genitourinary cancers, and these exciting TALAPRO-2 results further highlight our long-standing commitment to improving survival for men with prostate cancer.”
“These overall survival results indicate potentially practice-changing efficacy for TALZENNA in combination with XTANDI for men with metastatic castration-resistant prostate cancer,” said Neeraj Agarwal, M.D., FASCO, Professor and Presidential Endowed Chair of Cancer Research at Huntsman Cancer Institute, University of Utah, and global lead investigator for TALAPRO-2. “Metastatic castration-resistant prostate cancer is the most advanced and aggressive stage of the disease, and the TALAPRO-2 results provide much-needed hope to patients who remain in high unmet need for effective treatment options.”
At the time of the final analysis, the clinically meaningful improvement in radiographic progression free survival (rPFS) was maintained in both cohorts from the prior primary analysis
previously reported
and published in
The Lancet
. In addition, the safety profile of TALZENNA plus XTANDI was generally consistent with the known safety profile of each medicine. Detailed results from TALAPRO-2 will be submitted for presentation at an upcoming medical congress. These data will also be shared with global health authorities to potentially support regulatory filings to update and potentially expand the approved label for TALZENNA.
TALZENNA in combination with XTANDI was
approved
by the U.S. Food and Drug Administration (FDA) for the treatment of adult patients with HRR gene-mutated mCRPC in June 2023. The combination was also approved by the European Commission
in January 2024
for the treatment of adult patients with mCRPC in whom chemotherapy is not clinically indicated. TALZENNA is the first and only PARP inhibitor licensed in the European Union for use with XTANDI for patients with mCRPC, with or without gene mutations. TALZENNA in combination with XTANDI is now approved in more than 35 countries globally for patients with mCRPC.
About Metastatic Castration-Resistant Prostate Cancer
Prostate cancer is the second most common cancer in men and the fifth most common cause of cancer death among men worldwide, with an estimated 1.4 million new cases diagnosed in 2022.
1
In the U.S., it is the most common cancer in men.
2
mCRPC is a cancer that has spread beyond the prostate gland and has progressed despite medical or surgical treatment to lower testosterone. Approximately 10%–20% of prostate cancer patients develop mCRPC within 5−7 years of diagnosis.
3
Between 1.2%–2.1% of all prostate cancer cases globally are mCRPC.
4
About TALAPRO-2
The Phase 3 TALAPRO-2 trial is a multicenter, randomized, double-blind, placebo-controlled study that enrolled 1,035 unique patients with mCRPC (who had not received new life-prolonging systemic treatments after documentation of mCRPC) at sites in the U.S., Canada, Europe, South America, and the Asia-Pacific region. The study included two patient cohorts: all-comers (n=805, of whom 169 had HRR mutations and 636 did not) and those with HRR gene mutations (n=399, including 169 patients from Cohort 1 and 230 enrolled in Cohort 2). Patients with castrate testosterone levels were randomized to receive TALZENNA 0.5 mg/day plus XTANDI 160mg/day, or placebo plus XTANDI 160mg/day.
The primary endpoint of the trial was rPFS, defined as the time from the date of randomization to first objective evidence of radiographic progression by blinded independent review, or death, whichever occurred first, in both Cohort 1 (all-comers) and Cohort 2 (those with HRRm). Secondary endpoints included OS, objective response rate (ORR), duration of response (DOR), and prostate-specific antigen (PSA) response.
For more information on the TALAPRO-2 trial (
NCT03395197
), go to
www.clinicaltrials.gov
.
About TALZENNA
®
(talazoparib)
TALZENNA is an oral inhibitor of poly ADP-ribose polymerase (PARP), which plays a role in DNA damage repair. Preclinical studies have demonstrated that TALZENNA blocks PARP enzyme activity and traps PARP at the site of DNA damage, leading to decreased cancer cell growth and cancer cell death.
TALZENNA is approved in the U.S., EU, and multiple other regions for the treatment of adult patients with deleterious or suspected deleterious gBRCAm HER2-negative locally advanced or metastatic breast cancer. In the U.S., TALZENNA is approved in combination with XTANDI for the treatment of adult patients with homologous recombination repair (HRR) gene-mutated metastatic castration-resistant prostate cancer (mCRPC). In the EU, TALZENNA is approved in combination with enzalutamide for the treatment of adult patients with mCRPC in whom chemotherapy is not clinically indicated.
TALZENNA
®
(talazoparib) Indication in the U.S.
TALZENNA is a poly (ADP-ribose) polymerase (PARP) inhibitor indicated for:
HRR gene-mutated mCRPC:
Breast Cancer:
Please see full U.S. Prescribing Information and Patient Information for TALZENNA
®
(talazoparib) at
www.TALZENNA.com
.
About XTANDI
®
(enzalutamide) and Important Safety Information
XTANDI
®
(enzalutamide) is an androgen receptor signaling inhibitor. XTANDI is a standard of care and has received regulatory approvals in one or more countries around the world for use in men with metastatic castration-sensitive prostate cancer (mCSPC; also known as metastatic hormone-sensitive prostate cancer or mHSPC), metastatic castration-resistant prostate cancer (mCRPC), non-metastatic castration-resistant prostate cancer (nmCRPC) and nonmetastatic castration-sensitive prostate cancer (nmCSPC) with biochemical recurrence at high risk for metastasis (high-risk BCR). XTANDI is currently approved for one or more of these indications in more than 90 countries, including in the U.S., EU, and Japan. Over one million patients have been treated with XTANDI globally.
5
Please access this link for
XTANDI’S US Full Prescribing Information
for additional safety information.
About Pfizer Oncology
At Pfizer Oncology, we are at the forefront of a new era in cancer care. Our industry-leading portfolio and extensive pipeline includes three core mechanisms of action to attack cancer from multiple angles, including small molecules, antibody-drug conjugates (ADCs), and bispecific antibodies, including other immune-oncology biologics. We are focused on delivering transformative therapies in some of the world’s most common cancers, including breast cancer, genitourinary cancer, hematology-oncology, and thoracic cancers, which includes lung cancer. Driven by science, we are committed to accelerating breakthroughs to help people with cancer live better and longer lives.
About Pfizer: Breakthroughs That Change Patients’ Lives
At Pfizer, we apply science and our global resources to bring therapies to people that extend and significantly improve their lives. We strive to set the standard for quality, safety and value in the discovery, development, and manufacture of health care products, including innovative medicines and vaccines. Every day, Pfizer colleagues work across developed and emerging markets to advance wellness, prevention, treatments, and cures that challenge the most feared diseases of our time. Consistent with our responsibility as one of the world’s premier innovative biopharmaceutical companies, we collaborate with health care providers, governments, and local communities to support and expand access to reliable, affordable health care around the world. For 175 years, we have worked to make a difference for all who rely on us. We routinely post information that may be important to investors on our website at
www.Pfizer.com
. In addition, to learn more, please visit us on
www.Pfizer.com
and follow us on X at
@Pfizer
and
@Pfizer News
,
LinkedIn
,
YouTube
and like us on Facebook at
Facebook.com/Pfizer
.
About the Pfizer/Astellas Collaboration
In October 2009, Medivation, Inc., which is now part of Pfizer (NYSE: PFE), and Astellas (TSE: 4503) entered into a global agreement to jointly develop and commercialize XTANDI
®
(enzalutamide). The companies jointly commercialize XTANDI in the United States, and Astellas has responsibility for manufacturing and all additional regulatory filings globally, as well as commercializing XTANDI outside the United States.
References
1
Bray F, Laversanne M, Sung H, et al. Global cancer statistics 2022: GLOBOCAN estimates of incidence and mortality worldwide for 36 cancers in 185 countries.
CA: A Cancer Journal for Clinicians
. 2024;74(3):229-263. Published 2024 April 4. doi:
10.3322/caac.21834
2
American Cancer Society.
Key Statistics for Prostate Cancer
. Accessed August 2024. *other than non-melanoma skin cancer
3
Kirby M, Hirst C, Crawford ED. Characterising the castration-resistant prostate cancer population: a systematic review. Int J Clin Pract. 2011 Nov;65(11):1180-92. doi:
10.1111/j.1742-1241.2011.02799.x. PMID: 21995694
.
4
Shore N, Oliver L, Shui I, Gayle A, Wong OY, Kim J, Payne S, Amin S, Ghate S. Systematic Literature Review of the Epidemiology of Advanced Prostate Cancer and Associated Homologous Recombination Repair Gene Alterations. J Urol. 2021 Apr;205(4):977-986. doi: 10.1097/JU.0000000000001570. Epub 2020 Dec 17. PMID: 33332152.
https://www.auajournals.org/doi/10.1097/JU.0000000000001570
5
Data on file. Northbrook, IL: Astellas Inc.
SOURCE:
Pfizer
