Metastatic human epidermal growth factor 2 positive carcinoma of breast

This collaboration will provide early-stage HER2-positive breast cancer patients with access to the targeted therapy that can reduce the risk of cancer recurrence and spread ATHENS, Greece and LOS ANGELES, April 30, 2025 (GLOBE NEWSWIRE) -- Er-Kim, an international pharmaceutical company specializing in the commercialization of novel therapies in the EMEA region, today announced that it has signed an agreement with Puma Biotechnology, Inc. (NASDAQ: PBYI) to commercialize NERLYNX® (neratinib) in select countries in Eastern Europe and Central Asia. NERLYNX is designed to block human epidermal growth factor receptor 2 (HER2) in order to treat and limit breast cancer metastasis. Under the agreement, Er-Kim is appointed as the distribution partner for NERLYNX in Armenia, Azerbaijan, Belarus, Georgia, Kazakhstan, Kyrgyzstan, Russia, Tajikistan, Turkmenistan, and Uzbekistan. NERLYNX is a prescription medicine used alone to treat adults with early-stage HER2-positive breast cancer and who have previously been treated with trastuzumab-based therapy. NERLYNX is also approved for use with a medicine called capecitabine to treat adults with HER2-positive breast cancer that has spread to other parts of the body (metastatic) and who have received 2 or more anti-HER2 therapy medicines for metastatic breast cancer. According to the International Agency for Research on Cancer (IARC), globally, breast cancer is the most common cancer type among women and the second most common cancer type overall. An estimated 2.3 million new breast cancer cases and 670,000 breast cancer-related deaths occurred worldwide in 2022. However, the burden of breast cancer is not evenly distributed across different world regions. “While breast cancer affects individuals globally, treatment availability varies considerably across regions,” said Cem Zorlular, Chief Executive Officer of Er-Kim. “That is why we are pleased to be working with Puma Biotechnology to support access to NERLYNX in Russia and most of the Commonwealth of Independent States (CIS) for patients with early-stage breast cancer. Er-Kim has a long history of providing treatments in the EMEA region, particularly in women's health.” About Er-Kim Established in 1981, Er-Kim stands at the forefront of biopharmaceutical innovation, partnering with over 40 global leaders to revolutionize patient care in key international markets. Our pioneering business models, tailored for sustainability and flexibility, have positioned us as a full-service solution, extending our reach to over 600 million patients through our fully owned affiliates. With a dedicated team of over 280 professionals worldwide and revenues exceeding EUR 260M, Er-Kim is not just a partner but a trailblazer in healthcare, continually setting new standards in commercialization and patient access. For more information, please visit http://www.er-kim.com/. About Puma Biotechnology Puma Biotechnology, Inc. is a biopharmaceutical company with a focus on the development and commercialization of innovative products to enhance cancer care. Puma in-licensed the global development and commercialization rights to PB272 (neratinib, oral) in 2011. Neratinib, oral was approved by the U.S. Food and Drug Administration in 2017 for the extended adjuvant treatment of adult patients with early- stage HER2-overexpressed/amplified breast cancer, following adjuvant trastuzumab-based therapy, and is marketed in the United States as NERLYNX® (neratinib) tablets. In February 2020, NERLYNX was also approved by the FDA in combination with capecitabine for the treatment of adult patients with advanced or metastatic HER2-positive breast cancer who have received two or more prior anti-HER2-based regimens in the metastatic setting. NERLYNX was granted marketing authorization by the European Commission in 2018 for the extended adjuvant treatment of adult patients with early stage hormone receptor-positive HER2-overexpressed/amplified breast cancer and who are less than one year from completion of prior adjuvant trastuzumab-based therapy. NERLYNX® is a registered trademark of Puma Biotechnology, Inc. Further information about Puma Biotechnology may be found at https://www.pumabiotechnology.com. In September 2022, Puma entered into an exclusive license agreement for the development and commercialization of the anti-cancer drug alisertib, a selective, small molecule, orally administered inhibitor of aurora kinase A. Initially, Puma intends to focus the development of alisertib on the treatment of small cell lung cancer and breast cancer. In February 2024, Puma initiated ALISCA™-Lung1, a Phase II clinical trial of alisertib monotherapy for the treatment of patients with extensive-stage small cell lung cancer. In November 2024, Puma initiated ALISCA™-Breast1, a Phase II clinical trial of alisertib in combination with endocrine therapy for the treatment of patients with HER2-negative, HR-positive metastatic breast cancer. Media contact: Rosalia ScampoliMarketcom PRTel: (914) 815-1465rscampoli@marketcompr.com

LOS ANGELES--(BUSINESS WIRE)-- Puma Biotechnology, Inc. (NASDAQ: PBYI), a biopharmaceutical company, announced that clinical data on neratinib were presented in a poster session at the American Association for Cancer Research (AACR) Annual Meeting 2025. The AACR Annual Meeting is currently taking place at the McCormick Place in Chicago, Illinois. The poster is entitled, “CT071: Phase I trial of trastuzumab deruxtecan in combination with neratinib in solid tumors with HER2 alterations (NCI 10495).” Andrew A. Davis, Assistant Professor at Washington University School of Medicine, presented the poster during Session PO.CT01.01 – First-in-Human Phase I Clinical Trials 1. NCI 10495 is sponsored by the National Cancer Institute, part of National Institutes of Health, and conducted in the NCI funded Experimental Therapeutics Clinical Trials Network (ETCTN). This open label, multi-center, Phase I clinical trial (NCT05372614) enrolled 20 patients in three cohorts treated with three increasing dose levels, or a 3+3 trial design, to evaluate the safety and tolerability of trastuzumab deruxtecan (T-DXd or ENHERTU®) in combination with neratinib (NERLYNX®). Eligible patients had advanced solid tumors with HER2 immunohistochemistry 3+ (IHC3+), HER2 amplification identified by in situ hybridization or next-generation sequencing, or an activating HER2 mutation. Prior treatment with trastuzumab deruxtecan was not allowed. The dose of trastuzumab deruxtecan was fixed at 5.4 mg/kg. The three dose levels (DLs) for neratinib all started at 120 mg daily for the first week. DL1 remained at 120 mg daily throughout the course of treatment, DL2 escalated to 160 mg daily in week 2 and 200 mg by week 3, and DL3 escalated to 160 mg in week 2 and 240 mg by week 3. The primary endpoints were the determination of the dose-limiting toxicities (DLTs) during the first two cycles of treatment (42 days) and the determination of the recommended Phase II dose of the combination of trastuzumab deruxtecan and neratinib. Twenty patients received study treatment (DL1 N=7, DL2 N=4, and DL3 N=9). The most common treatment-emergent adverse events of any grade included nausea (N=15, 75%), diarrhea (N=15, 75%), fatigue (N=13, 65%), and hypokalemia (N=11, 55%). Grade 3 treatment-emergent adverse events that occurred in more than 2 patients included anemia (N=6, 30%), diarrhea (N=4, 20%), and hypokalemia (N=3, 15%). The only Grade 4 treatment-related adverse event was neutropenia that occurred in 1 patient (5%). One DLT (acute kidney injury) was observed at DL1, 0 DLTs were observed in DL2, and 1 DLT was observed (fatigue leading to early drug discontinuation) at DL3. Three patients developed Grade 1 pneumonitis or interstitial lung disease (ILD), 2 at DL1 and 1 at DL3. The proportion of reported treatment-emergent adverse events was lower at higher dose levels. Of 15 response-evaluable patients by RECIST v1.1, 4 patients had a partial response (PR), including patients with gastroesophageal (N=2, one HER2 IHC 3+ and one HER2 mutated), pancreatic (N=1, IHC 3+), and ovarian (N=1, IHC 3+; unconfirmed response) cancers. Notably, 3 of 5 patients with advanced pancreatic cancer were observed to have tumor regression (1 PR for 13+ cycles, 2 with stable disease consisting of one patient with -29.4% tumor regression for 9 cycles and one patient with -13.3% tumor regression for 8 cycles). Dose level 3, which consisted of trastuzumab deruxtecan at 5.4 mg/kg and neratinib at 120 mg in week 1, 160 mg week 2, and 240 mg week 3 onward, was selected as the recommended Phase II dose. Part 2 of this study, which consists of a pharmacodynamic evaluation of trastuzumab deruxtecan (5.4 mg/kg) and neratinib (RPD2) in 12 patients, opened to enrollment in March 2025. Patients with any advanced solid tumor and HER2 amplification/overexpression or a HER2 mutation will be enrolled. “Neratinib and trastuzumab deruxtecan showed impressive combination activity in preclinical models of HER2-mutated breast cancers, which prompted evaluation of the combination in this first-in-human clinical trial. I am pleased to report that the combination not only had a manageable safety profile, but we also observed early signs of efficacy across a variety of HER2-altered tumors,” said Dr. Davis. Alan H. Auerbach, Chief Executive Officer and President of Puma Biotechnology, added, “We are pleased with the tolerability and potentially promising signals of efficacy of neratinib in combination with trastuzumab deruxtecan, especially in hard-to-treat tumors including pancreatic cancer. We look forward to continued evaluation of this combination in the Phase II portion of this study.” NCI 10495 is also supported by Puma Biotechnology and Daiichi Sankyo, Inc. through Cooperative Research and Development Agreements with NCI. Trastuzumab deruxtecan is a specifically engineered HER2 directed DXd antibody drug conjugate (ADC) discovered by Daiichi Sankyo (TSE: 4568) and being jointly developed and commercialized by Daiichi Sankyo and AstraZeneca (LSE/STO/Nasdaq: AZN). About Puma Biotechnology Puma Biotechnology, Inc. is a biopharmaceutical company with a focus on the development and commercialization of innovative products to enhance cancer care. Puma in-licensed the global development and commercialization rights to PB272 (neratinib, oral) in 2011. Neratinib, oral was approved by the U.S. Food and Drug Administration in 2017 for the extended adjuvant treatment of adult patients with early stage HER2-overexpressed/amplified breast cancer, following adjuvant trastuzumab-based therapy, and is marketed in the United States as NERLYNX® (neratinib) tablets. In February 2020, NERLYNX was also approved by the FDA in combination with capecitabine for the treatment of adult patients with advanced or metastatic HER2-positive breast cancer who have received two or more prior anti-HER2-based regimens in the metastatic setting. NERLYNX was granted marketing authorization by the European Commission in 2018 for the extended adjuvant treatment of adult patients with early stage hormone receptor-positive HER2-overexpressed/amplified breast cancer and who are less than one year from completion of prior adjuvant trastuzumab-based therapy. NERLYNX® is a registered trademark of Puma Biotechnology, Inc. In September 2022, Puma entered into an exclusive license agreement for the development and commercialization of the anti-cancer drug alisertib, a selective, small molecule, orally administered inhibitor of aurora kinase A. Initially, Puma intends to focus the development of alisertib on the treatment of small cell lung cancer and breast cancer. In February 2024, Puma initiated ALISCA™-Lung1, a Phase II clinical trial of alisertib monotherapy for the treatment of patients with extensive-stage small cell lung cancer. In November 2024, Puma initiated ALISCA™-Breast1, a Phase II clinical trial of alisertib in combination with endocrine therapy for the treatment of patients with HER2-negative, HR-positive metastatic breast cancer. Further information about Puma Biotechnology may be found at https://www.pumabiotechnology.com. Alan H. Auerbach or Mariann Ohanesian, Puma Biotechnology, Inc., +1 424 248 6500 info@pumabiotechnology.com ir@pumabiotechnology.com David Schull or Olipriya Das, Russo Partners, +1 212 845 4200 david.schull@russopartnersllc.com olipriya.das@russopartnersllc.com

Since its launch in 2015, it has been prescribed to more than 200,000 patients globally. The drug is currently approved for use in both men and women, expanding its market potential. Despite facing competition from other CDK4/6 inhibitors like Novartis' KISQALI and Eli Lilly's VERZENIO, IBRANCE maintains a strong position in the metastatic setting. LAS VEGAS, April 24, 2025 /PRNewswire/ -- DelveInsight's " IBRANCE Market Size, Forecast, and Market Insight Report" highlights the details around IBRANCE, a CDK4/6 inhibitor. The report provides product descriptions, patent details, and competitor products (marketed and emerging therapies) of IBRANCE. The report also highlights the historical and forecasted sales from 2020 to 2034 segmented into 7MM [the United States, the EU4 (Germany, France, Italy, and Spain), the United Kingdom, and Japan]. Pfizer's IBRANCE (palbociclib) Overview IBRANCE is an oral medication that inhibits CDKs 4 and 6, which are crucial regulators of the cell cycle that drive cellular progression. In the U.S., IBRANCE is approved for treating adult patients with hormone receptor-positive (HR+), human epidermal growth factor receptor 2-negative (HER2-) advanced or metastatic breast cancer. It is used in combination with an aromatase inhibitor as a first-line endocrine therapy for postmenopausal women or men or with fulvestrant for patients whose disease has progressed after endocrine treatment. IBRANCE is currently authorized in over 90 countries and has been prescribed to more than 200,000 patients worldwide. Learn more about IBRANCE projected market size for metastatic HR+/HER2− breast cancer @ IBRANCE Market Potential The HR+ HER2- subtype is the most commonly found type of breast cancer, characterized by cancer cells that have estrogen and progesterone receptors but do not overexpress HER2. A patient's journey typically begins with the onset of concerning symptoms, leading to a comprehensive clinical evaluation and various imaging tests. DelveInsight estimates that approximately 211K new cases of HR+/HER2– breast cancer occurred in the US in 2024. CDK4/6 inhibitors currently dominate the first-line treatment market and represent a significant advancement in the management of HR+/HER2-ve breast cancer. The data from large, randomized clinical trials are both strong and consistent. While single-agent endocrine therapies have shown limited benefits in the first and subsequent treatment lines for women with ER-positive metastatic breast cancer (mBC), combination therapies have emerged as a more effective option for many patients. In recent years, the treatment landscape for HR+/HER2−ve breast cancer has been transformed with the introduction of highly active targeted therapies, including CDK4/6 inhibitors, mTOR inhibitors, PARP inhibitors, new oral SERDs, and PI3K inhibitors. These advances have expanded the range of treatment options and improved survival outcomes for these patients. The market for metastatic HR+/HER2− breast cancer in the 7MM is projected to grow during the forecast period (2025–2034) due to the introduction of several novel therapies in the market. Discover more about the metastatic HR+/HER2− breast cancer market in detail @ Metastatic HR+/HER2− Breast Cancer Market Report Emerging Competitors of IBRANCE Some of the drugs in the pipeline include Gedatolisib (Celcuity), ARV-471 (Arvinas and Pfizer), OP-1250 (Olema Pharmaceuticals), KEYTRUDA (Merck), and Rupitasertib (Evexta Bio), among others. In December 2024, Arvinas and Pfizer presented preliminary data from the ongoing Phase 1b portion of the TACTIVE-U sub-study of vepdegestrant in combination with abemaciclib among patients with locally advanced or metastatic ER+/HER2- breast cancer at the San Antonio Breast Cancer Symposium (SABCS) 2024. In December 2024, Olema Pharmaceuticals presented clinical results from the ongoing Phase Ib/II study of palazestrant in combination with ribociclib in patients with ER+/HER2- advanced or metastatic breast cancer at SABCS 2024. To know more about the number of competing drugs in development, visit @ IBRANCE Market Positioning Compared to Other Drugs Key Milestones of IBRANCE In February 2021, Pfizer Inc. announced that the U.S. Patent and Trademark Office (USPTO) has granted a U.S. Patent Term Extension (PTE) certificate for IBRANCE. This extension prolongs the validity of U.S. Patent No. RE47,739 ('739) by over four years, now lasting until March 5, 2027. In April 2019, Pfizer announced that the FDA has approved a supplemental New Drug Application (sNDA) to broaden the uses of IBRANCE in combination with an aromatase inhibitor or fulvestrant, now including men with hormone receptor-positive (HR+), HER2-negative (HER2-) advanced or metastatic breast cancer. In March 2017, Pfizer Inc. revealed that the FDA has approved a supplemental New Drug Application (sNDA) for IBRANCE, its pioneering cyclin-dependent kinase 4/6 (CDK 4/6) inhibitor, following the positive outcomes from the confirmatory Phase 3 trial PALOMA-2. In September 2016, Pfizer Inc. announced that the European Medicines Agency's (EMA) Committee for Medicinal Products for Human Use (CHMP) had issued a positive recommendation for the marketing authorization of IBRANCE® (palbociclib) in the European Union (EU). This recommendation is for its use in treating women with hormone receptor-positive, HER2-negative (HR+/HER2-) locally advanced or metastatic breast cancer. In February 2016, Pfizer announced that the FDA has approved a new indication for IBRANCE 125mg capsules, expanding its use. The approval allows IBRANCE to be used in combination with fulvestrant for the treatment of hormone receptor-positive (HR+), human epidermal growth factor receptor 2-negative (HER2-) advanced or metastatic breast cancer in women whose disease has progressed after endocrine therapy. In February 2015, Pfizer announced that the FDA granted accelerated approval for IBRANCE in combination with letrozole to treat postmenopausal women with estrogen receptor-positive, human epidermal growth factor receptor 2-negative (ER+/HER2-) advanced breast cancer as the initial endocrine-based therapy for their metastatic disease. Discover how IBRANCE is shaping the metastatic HR+/HER2− breast cancer treatment landscape @ IBRANCE Drug IBRANCE Market Dynamics IBRANCE is a targeted therapy that has revolutionized the treatment of hormone receptor-positive, HER2-negative breast cancer, particularly in combination with aromatase inhibitors or letrozole. Developed by Pfizer, IBRANCE was one of the first CDK4/6 inhibitors approved by the FDA for metastatic breast cancer, and its approval has significantly changed the treatment landscape. The drug works by inhibiting cyclin-dependent kinases 4 and 6, which are key regulators of the cell cycle, thus preventing cancer cells from proliferating. Its market dynamics have been shaped by the growing demand for targeted therapies, as well as the increasing focus on precision medicine and improved patient outcomes. The global market for IBRANCE has been positively impacted by its proven efficacy in clinical trials and its ability to extend progression-free survival in breast cancer patients. The drug's market dominance is underpinned by its widespread acceptance and adoption by oncologists worldwide. However, competition is intensifying, with other CDK4/6 inhibitors such as VERZENIO (abemaciclib) and KISQALI (ribociclib) entering the market, offering similar benefits but with some distinct clinical profiles. This competitive landscape has led to strategic pricing and marketing strategies by Pfizer, aiming to maintain IBRANCE's market leadership while managing pressures from generic alternatives. Additionally, the evolving reimbursement landscape and regulatory policies around oncology drugs are crucial factors influencing the market dynamics. Health insurers and government healthcare programs often scrutinize the cost-effectiveness of cancer treatments, which can impact the pricing and accessibility of IBRANCE in different markets. Another factor is the rising focus on combination therapies, as IBRANCE is often used in conjunction with other drugs like letrozole, which boosts its efficacy and market potential. The shift toward personalized cancer treatment regimens is expected to continue fueling demand for CDK4/6 inhibitors like IBRANCE, especially in more advanced stages of breast cancer. In terms of geographical markets, IBRANCE has seen significant uptake in North America and Europe, where the healthcare infrastructure supports innovative cancer therapies. However, emerging markets, where the economic barriers to accessing expensive cancer treatments can be higher, present a challenge to the widespread use of IBRANCE. Pfizer's ongoing efforts to expand in these regions, through partnerships and pricing adjustments, will be key to ensuring continued growth in global market share. Overall, the IBRANCE market is poised for steady growth, driven by clinical advancements, increasing breast cancer diagnoses, and the continual push toward more targeted, effective therapies. Dive deeper to get more insight into IBRANCE's strengths & weaknesses relative to competitors @ IBRANCE Market Drug Report Table of Contents Related Reports Metastatic HR+/HER2− Breast Cancer Market Metastatic HR+/HER2− Breast Cancer Market Insights, Epidemiology, and Market Forecast – 2034 report deliver an in-depth understanding of the disease, historical and forecasted epidemiology, as well as the market trends, market drivers, market barriers, and key metastatic HR+/HER2− breast cancer companies, including Merck, Arvinas, Olema Pharmaceuticals, Celcuity, Roche, AstraZeneca, Daiichi Sankyo, Eli Lilly, Sermonix Pharmaceuticals, Genentech, Veru Pharma, DualityBio, BioNtech, Evgen Pharma, Carrick Therapeutics, EQRx, G1 Therapeutics, Immutep, among others. HR+/HER2− Breast Cancer Pipeline HR+/HER2− Breast Cancer Pipeline Insight – 2025 report provides comprehensive insights about the pipeline landscape, pipeline drug profiles, including clinical and non-clinical stage products, and the key HR+/HER2− breast cancer companies, including Regor Therapeuics, Seagen Inc., CytomX Therapeutics, Taizhou EOC Pharma, Chia Tai Tianqing Pharmaceutical Group, AstraZeneca, Daiichi Sankyo, Inc., Tyme, Inc., Seagen Inc., Context Therapeutics, Eisai Inc., Shanghai Hengrui Pharmaceutical Co., Ltd., Jiangsu Simcere Pharmaceutical Co., Kind Pharmaceuticals, Merus N.V., Atossa Therapeutics, Roche, among others. Breast Cancer Market Breast Cancer Market Insights, Epidemiology, and Market Forecast – 2034 report deliver an in-depth understanding of the disease, historical and forecasted epidemiology, market share of the individual therapies, and key breast cancer companies including Veru, Sanofi, Roche, AstraZeneca, Eli Lilly, EQRx, Gilead, Sermonix Pharmaceuticals, Evgen Pharma, Tyme, Genentech, Daiichi Sankyo, among others. Metastatic Breast Cancer Pipeline Metastatic Breast Cancer Pipeline Insight – 2025 report provides comprehensive insights about the pipeline landscape, including clinical and non-clinical stage products, and the key metastatic breast cancer companies, including Roche, RemeGen, SynCore Biotechnology, Allarity Therapeutics, Daiichi Sankyo Company, Jiangsu Alphamab Biopharmaceuticals Co., Ltd, Byondis B.V., Jiangsu Hansoh Pharmaceutical Co., Ltd., Shanghai Miracogen Inc., Ambrx, Inc., Daehwa Pharmaceutical Co., Ltd., Phoenix Molecular Designs, GlycoMimetics Incorporated, Rhizen Pharmaceuticals SA, Menarini Group, Samus Therapeutics, Inc., Hanmi Pharmaceutical Company Limited, Jiangxi Qingfeng Pharmaceutical Co. Ltd., Immutep Limited, Arvinas Inc., G1 Therapeutics, Mirati Therapeutics Inc., Chia Tai Tianqing Pharmaceutical, Shanghai Pharmaceuticals Holding Co., Ltd, Pfizer, OncoTherapy Science, Inc., Eisai Inc., Dizal Pharmaceuticals, Jiangsu Hengrui Medicine Co., Tyme, Inc, Orion Pharma, HiberCell, Inc., Rhizen Pharmaceuticals SA, Hutchison Medipharma Limited, OncoPep Inc., Taizhou Hanzhong biomedical co. LTD, among others. About DelveInsight DelveInsight is a leading Business Consultant and Market Research firm focused exclusively on life sciences. It supports pharma companies by providing comprehensive end-to-end solutions to improve their performance. Get hassle-free access to all the healthcare and pharma market research reports through our subscription-based platform PharmDelve . 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