Midostaurin

-- ASH data reinforce survival benefits of front-line AYVAKIT® (avapritinib) use in patients with advanced SM -- -- Bone density analyses reported in patients with advanced SM underscore disease-modifying effects of AYVAKIT -- CAMBRIDGE, Mass., Dec. 7, 2024 /PRNewswire/ -- Blueprint Medicines Corporation (Nasdaq: BPMC) today announced data presentations that continue to demonstrate the long-term clinical benefits of AYVAKIT® (avapritinib) in advanced systemic mastocytosis (advanced SM), and reflect the company's ongoing partnership with the SM community to redefine the future of patient care – from improving diagnostic rates to raising the bar on treatment outcomes. The datasets, which include one oral presentation and three poster presentations, will be reported at the 66th American Society of Hematology (ASH) Annual Meeting and Exposition, taking place December 7-10 in San Diego. "Systemic mastocytosis is associated with mast cell infiltration across multiple organ systems, chronic inflammation caused by immune dysregulation, unpredictable symptoms that may worsen over time, and serious comorbidities such as osteoporosis, highlighting the urgency to treat patients early in the course of their disease," said Becker Hewes, M.D., Chief Medical Officer at Blueprint Medicines. "AYVAKIT has fundamentally changed the treatment paradigm by targeting the disease at its source, showing prolonged survival outcomes for patients with advanced SM, as well as durable symptom control and quality-of-life improvements for patients with ISM. Based on the substantial datasets we have amassed over more than a decade, and our continued collaboration with the SM community, we have designed the HARBOR trial of elenestinib – a next-generation KIT D816V inhibitor – to rigorously assess a broad range of endpoints reflecting disease-modifying impact." Data reported at ASH highlight the survival benefits of front-line AYVAKIT use in patients with advanced SM, and support Blueprint Medicines' plans to evaluate novel clinical measures indicative of disease modification – such as bone density and biomarkers of chronic inflammation – in the registrational HARBOR trial. Key results include: In pooled analyses from the PATHFINDER and EXPLORER trials, treatment-naïve patients with advanced SM showed significant survival benefits with AYVAKIT, when indirectly compared to real-world outcomes for midostaurin. In the PATHFINDER trial, AYVAKIT led to sustained improvements in bone density for advanced SM patients who had low bone mass at baseline. In the PIONEER trial, patients with indolent SM (ISM) had significant baseline levels of immune dysregulation relative to healthy donors, reflecting the chronic inflammatory burden of the disease. Non-Invasive, Blood-Based Assay Identified KIT Mutations Not Previously Detectable by Existing Tests ASH data show that ultra-sensitive KIT testing in the peripheral blood – a novel tool in clinical development that is more sensitive than current commercially available methods – identified previously undetected KIT mutations in a number of PIONEER trial patients. Emerging clinical research with ultra-sensitive KIT assays suggest SM may be more prevalent than previously thought. An additional data presentation highlights the application of machine learning techniques to analyze baseline, blood-based parameters of Blueprint Medicines' clinical trial participants. Following these analyses, a predictive model was developed to distinguish between advanced SM and ISM, and its accuracy was validated by an independent dataset from Dana-Farber Cancer Institute. Collectively, these data build on Blueprint Medicines' collaborative efforts with clinical experts to improve and accelerate how SM is diagnosed and treated. Data presentations will be made available in the "Science―Publications and Presentations" section of Blueprint Medicines' website. Oral Presentation: Analysis of Avapritinib Clinical Trial Data Generates a Highly Accurate Predictive Model for Advanced Systemic Mastocytosis Versus Indolent Systemic Mastocytosis Based on Peripheral Blood Testing (Abstract 107 – Saturday, December 7) Poster Presentation: Overall Survival and Duration of Treatment in Patients with Advanced Systemic Mastocytosis Receiving Avapritinib Versus Midostaurin or Best Available Therapy in a Real-World Setting (Abstract 1801 – Saturday, December 7) Poster Presentation: Ultra-Sensitive KIT Testing Uncovers Previously Undetected KIT Mutations in Patients with Indolent Systemic Mastocytosis: Results from the PIONEER Trial (Abstract 3164 – Sunday, December 8) Poster Presentation: Disease-Modifying Effects of Avapritinib in Patients with Advanced Systemic Mastocytosis: Improvements in Bone Density (Abstract 4544 – Monday, December 9) Publication-Only Abstract: Blood-Based Proteomics for Deeper Insights into Indolent Systemic Mastocytosis: the PIONEER Trial Experience (Abstract 6569) About Systemic Mastocytosis Systemic mastocytosis (SM) is a rare disease driven by the KIT D816V mutation in about 95 percent of cases. Uncontrolled proliferation and activation of mast cells result in chronic, severe and often unpredictable symptoms across multiple organ systems. The vast majority of those affected have indolent systemic mastocytosis (ISM). A broad range of symptoms, including anaphylaxis, maculopapular rash, pruritis, diarrhea, brain fog, fatigue and bone pain, frequently persist in patients with ISM despite treatment with multiple symptom-directed therapies. This burden of disease can lead to a profound, negative impact on quality of life. Patients often live in fear of severe, unexpected symptoms, have limited ability to work or perform daily activities, and isolate themselves to protect against unpredictable triggers. Until 2023, there were no approved therapies for the treatment of ISM. A minority of patients have advanced SM, which encompasses a group of high-risk SM subtypes including aggressive SM (ASM), SM with an associated hematological neoplasm (SM-AHN) and mast cell leukemia (MCL). In addition to mast cell activation symptoms, advanced SM is associated with organ damage due to mast cell infiltration and poor survival. About AYVAKIT (avapritinib) AYVAKIT (avapritinib) is approved by the U.S. Food and Drug Administration (FDA) for the treatment of three indications: adults with ISM, adults with advanced SM, including ASM, SM-AHN and MCL, and adults with unresectable or metastatic gastrointestinal stromal tumor (GIST) harboring a PDGFRA exon 18 mutation, including PDGFRA D842V mutations. Under the brand name AYVAKYT® (avapritinib), this medicine is approved by the European Commission for the treatment of adults with ISM with moderate to severe symptoms inadequately controlled on symptomatic treatment, adults with ASM, SM-AHN and MCL, after at least one systemic therapy, and adults with unresectable or metastatic GIST harboring the PDGFRA D842V mutation. The therapy is not recommended for the treatment of patients with low platelet counts (less than 50,000/µL). Please click here to see the full U.S. Prescribing Information for AYVAKIT, and click here to see the European Summary of Product Characteristics for AYVAKYT. IMPORTANT SAFETY INFORMATION Intracranial Hemorrhage — Serious intracranial hemorrhage (ICH) may occur with AYVAKIT treatment; fatal events occurred in <1% of patients. Overall, ICH (eg, subdural hematoma, ICH, and cerebral hemorrhage) occurred in 2.9% of 749 patients who received AYVAKIT in clinical trials. In Advanced SM patients who received AYVAKIT at 200 mg daily, ICH occurred in 2 of 75 patients (2.7%) who had platelet counts ≥50 x 109/L prior to initiation of therapy and in 3 of 80 patients (3.8%) regardless of platelet counts. In ISM patients, no events of ICH occurred in the 246 patients who received any dose of AYVAKIT in the PIONEER study. Monitor patients closely for risk factors of ICH which may include history of vascular aneurysm, ICH or cerebrovascular accident within the prior year, concomitant use of anticoagulant drugs, or thrombocytopenia. Symptoms of ICH may include headache, nausea, vomiting, vision changes, or altered mental status. Advise patients to seek immediate medical attention for signs or symptoms of ICH. Permanently discontinue AYVAKIT if ICH of any grade occurs. In Advanced SM patients, a platelet count must be performed prior to initiating therapy. AYVAKIT is not recommended in Advanced SM patients with platelet counts <50 x 109/L. Following treatment initiation, platelet counts must be performed every 2 weeks for the first 8 weeks. After 8 weeks of treatment, monitor platelet counts every 2 weeks or as clinically indicated based on platelet counts. Manage platelet counts of <50 x 109/L by treatment interruption or dose reduction. Cognitive Effects — Cognitive adverse reactions can occur in patients receiving AYVAKIT and occurred in 33% of 995 patients overall in patients who received AYVAKIT in clinical trials including: 28% of 148 Advanced SM patients (3% were Grade ≥3), and 7.8% of patients with ISM who received AYVAKIT + best supportive care (BSC) versus 7.0% of patients who received placebo + BSC (<1% were Grade 3). Depending on the severity and indication, withhold AYVAKIT and then resume at same dose or at a reduced dose upon improvement, or permanently discontinue. Photosensitivity — AYVAKIT may cause photosensitivity reactions. In all patients treated with AYVAKIT in clinical trials (n=1049), photosensitivity reactions occurred in 2.5% of patients. Advise patients to limit direct ultraviolet exposure during treatment with AYVAKIT and for one week after discontinuation of treatment. Embryo-Fetal Toxicity — AYVAKIT can cause fetal harm when administered to a pregnant woman. Advise pregnant women of the potential risk to a fetus. Advise females and males of reproductive potential to use an effective method of contraception during treatment with AYVAKIT and for 6 weeks after the final dose of AYVAKIT. Advise women not to breastfeed during treatment with AYVAKIT and for 2 weeks after the final dose. Adverse Reactions — The most common adverse reactions (≥20%) in patients with Advanced SM were edema, diarrhea, nausea, and fatigue/asthenia. The most common adverse reactions (≥10%) in patients with ISM were eye edema, dizziness, peripheral edema, and flushing. Drug Interactions — Avoid coadministration of AYVAKIT with strong or moderate CYP3A inhibitors. If coadministration with a moderate CYP3A inhibitor cannot be avoided in patients with Advanced SM, reduce dose of AYVAKIT. Avoid coadministration of AYVAKIT with strong or moderate CYP3A inducers. If contraception requires estrogen, limit ethinyl estradiol to ≤20 mcg unless a higher dose is necessary. To report suspected adverse reactions, contact Blueprint Medicines Corporation at 1-888-258-7768 or the FDA at 1-800-FDA-1088 or . AYVAKIT is available in 25-mg, 50-mg, 100-mg and 200-mg tablets. Please click here to see the full U.S. Prescribing Information for AYVAKIT. About Blueprint Medicines Blueprint Medicines is a global, fully integrated biopharmaceutical company that invents life-changing medicines. We seek to alleviate human suffering by solving important medical problems in two core focus areas: allergy/inflammation and oncology/hematology. Our approach begins by targeting the root causes of disease, using deep scientific knowledge in our core focus areas and drug discovery expertise across multiple therapeutic modalities. We have a track record of success with two approved medicines, including AYVAKIT®/AYVAKYT® (avapritinib) which we are bringing to patients with systemic mastocytosis (SM) in the U.S. and Europe. Leveraging our established research, development, and commercial capability and infrastructure, we now aim to significantly scale our impact by advancing a broad pipeline of programs ranging from early science to advanced clinical trials in mast cell diseases including SM and chronic urticaria, breast cancer and other solid tumors. For more information, visit and follow us on X (formerly Twitter; @BlueprintMeds) and LinkedIn. Cautionary Note Regarding Forward-Looking Statements This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, without limitation, statements regarding the potential benefits of AYVAKIT for the treatment of patients with advanced SM and ISM; statements regarding the HARBOR trial for elenestinib; plans, strategies, timelines and expectations for Blueprint Medicines' current or future approved drugs and drug candidates; the potential benefits of any of Blueprint Medicines' current or future approved drugs or drug candidates in treating patients; and Blueprint Medicines' financial performance, strategy, goals and anticipated milestones, business plans and focus. The words "aim," "may," "will," "could," "would," "should," "expect," "plan," "anticipate," "intend," "believe," "estimate," "predict," "project," "potential," "opportunity," "continue," "target" and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Any forward-looking statements in this press release are based on management's current expectations and beliefs and are subject to a number of risks, uncertainties and important factors that may cause actual events or results to differ materially from those expressed or implied by any forward-looking statements contained in this press release, including, without limitation, risks and uncertainties related to: the delay of any current or planned clinical trials or the development of the company's current or future drug candidates; the company's ability to successfully demonstrate the safety and efficacy of its drug candidates and gain approval of its drug candidates on a timely basis, if at all; the possibility that preclinical and clinical results for the company's drug candidates may not support further development of such drug candidates either as monotherapies or in combination with other agents or may impact the anticipated timing of data or regulatory submissions; the timing of the initiation of clinical trials and trial cohorts at clinical trial sites and the possibility patient enrollment rates may be delayed or slower than anticipated; the actions of regulatory agencies and how this may affect the initiation, timing and progress of clinical trials; the company's ability to obtain, maintain and enforce patent and other intellectual property protection for its products and current or future drug candidates it is developing; and the success of the company's current and future collaborations, partnerships or licensing arrangements. These and other risks and uncertainties are described in greater detail in the section entitled "Risk Factors" in Blueprint Medicines' filings with the Securities and Exchange Commission (SEC), including Blueprint Medicines' most recent Annual Report on Form 10-K, as supplemented by its most recent Quarterly Report on Form 10-Q and any other filings that Blueprint Medicines has made or may make with the SEC in the future. Any forward-looking statements contained in this press release represent the company's views only as of the date hereof and should not be relied upon as representing its views as of any subsequent date. Except as required by law, the company explicitly disclaims any obligation to update any forward-looking statements contained in this press release as a result of new information, future events or otherwise. Accordingly, readers are cautioned not to place undue reliance on these forward-looking statements. Trademarks Blueprint Medicines, AYVAKIT, AYVAKYT and associated logos are trademarks of Blueprint Medicines Corporation. SOURCE Blueprint Medicines Corporation WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED

BASKING RIDGE, N.J.--( BUSINESS WIRE )--Daiichi Sankyo (TSE: 4568) will present new clinical research across its oncology portfolio with more than 45 abstracts in multiple types of solid and blood cancers at the 2024 ESMO Asia Congress (#ESMOAsia24), San Antonio Breast Cancer Symposium (#SABCS24) and American Society of Hematology (#ASH24) Annual Meeting prior to its Science & Technology Day. Data at ESMO Asia, SABCS and ASH will showcase Daiichi Sankyo’s progress towards its goal of creating new standards of care for patients with cancer. Highlights include three late-breaking presentations, including a pooled analysis of data from the TROPION-Lung05 phase 2 and TROPION-Lung01 phase 3 trials of datopotamab deruxtecan (Dato-DXd) in patients with EGFR-mutated advanced non-small cell lung cancer (NSCLC) at ESMO Asia, as well as a subgroup analysis from the DESTINY-Breast06 phase 3 trial of ENHERTU ® (trastuzumab deruxtecan) in patients with unresectable or metastatic HR positive, HER2 low (IHC 1+ or IHC 2+/ISH-) or HER2 ultralow (IHC 0 with membrane staining) breast cancer and the primary analysis from the VALENTINE phase 2 trial of patritumab deruxtecan (HER3-DXd) in patients with early HR positive, HER2 negative breast cancer at SABCS. “ Important updates in difficult-to-treat cancers including lung, breast, gastric and biliary tract cancer as well as acute myeloid leukemia and peripheral T-cell lymphoma will be highlighted at these upcoming meetings,” said Ken Takeshita, MD, Global Head, R&D, Daiichi Sankyo. “ We continue to make important progress with our approved and pipeline medicines with the goal of changing the standard of care across a wide range of cancers.” Innovation in Lung, Breast, Gastric and Biliary Tract Cancer at ESMO Asia Late-breaking data at ESMO Asia will highlight a pooled analysis of results from the TROPION-Lung05 phase 2 and TROPION-Lung01 phase 3 trials of datopotamab deruxtecan in patients with previously treated EGFR-mutated advanced NSCLC during a proffered paper session. Two mini oral presentations will feature results of the TROPION-Breast01 phase 3 trial of datopotamab deruxtecan in Chinese patients with previously treated metastatic HR positive, HER2 low or negative breast cancer and the final results of the DESTINY-Gastric06 phase 2 trial of ENHERTU in Chinese patients with previously treated HER2 positive advanced gastric or gastroesophageal junction (GEJ) adenocarcinoma. Results of DESTINY-Gastric06 led to the recent conditional approval in China of ENHERTU as a monotherapy for the treatment of adult patients with locally advanced or metastatic HER2 positive gastric or GEJ adenocarcinoma who have received two or more prior treatment regimens. Trials-in-progress posters also will feature the trial designs of three ongoing ENHERTU clinical trials, including the DESTINY-BTC01 phase 3 trial that will evaluate ENHERTU with rilvegostomig, AstraZeneca’s PD-1/TIGIT bispecific antibody, versus standard of care in patients with previously untreated HER2 expressing, locally advanced or metastatic biliary tract cancer, and the DESTINY-Gastric03 phase 1b/2 trial where a new arm has been added to evaluate ENHERTU in combination with rilvegostomig and chemotherapy in patients with HER2 positive or HER2 low gastric or GEJ adenocarcinoma. A second part of the DESTINY-PanTumor02 phase 2 trial of ENHERTU also will be presented where patients with previously treated HER2 expressing metastatic solid tumors will be enrolled into one of five new cohorts: patients with any tumor expressing HER2 IHC 3+ (excluding breast, gastric and colorectal cancer); patients with any tumor expressing HER2 IHC 2+/ISH+ (excluding breast, gastric and colorectal cancer); patients with HER2 IHC 2+/1+ endometrial cancer; patients with HER2 IHC 2+/1+ ovarian cancer; and patients with HER2 IHC 2+/1+ cervical cancer. Continued Progress in Breast Cancer at SABCS Late-breaking presentations in breast cancer at SABCS will include two oral presentations featuring a subgroup analysis of the DESTINY-Breast06 phase 3 trial reporting on the impact of response to prior endocrine-based therapy on outcomes in patients with unresectable or metastatic HR positive, HER2 low or HER2 ultralow breast cancer who failed at least one line of endocrine therapy receiving ENHERTU compared to chemotherapy, and the primary results from the VALENTINE phase 2 trial evaluating neoadjuvant patritumab deruxtecan (HER3-DXd) alone or in combination with letrozole in patients with high-risk HR positive, HER2 negative early breast cancer. Other data at SABCS includes two spotlight poster presentations highlighting the first exploratory biomarker analysis assessing the impact of genomic alterations on the efficacy of ENHERTU compared to ado-trastuzumab emtansine (T-DM1) in patients with HER2 positive metastatic breast cancer from the DESTINY-Breast03 phase 3 trial, and the effects of ENHERTU on health-related quality of life and neurological function from the DESTINY-Breast12 phase 3b/4 trial in patients with previously treated HER2 positive metastatic breast cancer with or without brain metastases. Final results from the dose expansion portion of the DESTINY-Breast08 phase 1b trial evaluating ENHERTU in combination with capecitabine or capivasertib in patients with HER2 low metastatic breast cancer also will be presented as a poster presentation. Trial-in-progress posters will feature the trial designs from a sub-protocol of a phase 1b master protocol trial evaluating ENHERTU in combination with valemetostat, a dual EZH1 and EZH2 inhibitor, in patients with previously treated HER2 low unresectable or metastatic breast cancer as well as a phase 1b trial evaluating the combination in patients with previously treated HER2 low, HER2 ultralow or HER2 null metastatic breast cancer. Updates in Hematology Portfolio in Certain Leukemias and Lymphomas At ASH, several sub-analyses of the QuANTUM-First phase 3 trial of VANFLYTA ® (quizartinib) in patients with newly diagnosed FLT3 -ITD positive acute myeloid leukemia (AML) will be presented. An oral presentation will highlight data on the frequency of co-mutations in trial patients and their impact on remission rate, overall survival and relapse-free survival. Three poster presentations will report new data, including the impact of continuation therapy on the efficacy of VANFLYTA, focusing on measurable residual disease status; a concordance between utilizing a FLT3 -ITD mutation detection clinical trial assay and a next-generation sequencing measurable residual disease assay; and a matching adjusted indirect comparison analysis of VANFLYTA compared to midostaurin in patients with newly diagnosed FLT3 -ITD AML. Additionally, several poster presentations will report on the QUIWI phase 2 trial that evaluated VANFLYTA in combination with standard chemotherapy in patients with newly diagnosed FLT3 -ITD negative AML, including the final results of QUIWI and sub-analyses of the trial by mutational status, including FLT3 -TKD and NPM1, and ELN risk categorization. The QUIWI phase 2 trial formed the basis of the QuANTUM-Wild phase 3 trial that is further evaluating the addition of VANFLYTA to standard chemotherapy in this patient population. The design of the QuANTUM-Wild phase 3 trial will be highlighted as a trial-in-progress poster. Other data at ASH includes two poster presentations reporting the primary results of the VALYM phase 2 trial of valemetostat in patients with relapsed or refractory large B-cell lymphoma and an exploratory analysis of circulating tumor DNA, a novel biomarker, to potentially predict clinical response to valemetostat from the VALENTINE-PTCL01 phase 2 trial in patients with relapsed or refractory peripheral T-cell lymphoma, which was recently published in The Lancet Oncology . Science & Technology Day Daiichi Sankyo will hold “Science & Technology Day,” formerly called R&D Day, for investors on Monday, December 16, 2024 from 5:30 to 7:30 pm EST / Tuesday, December 17 from 7:30 to 9:30 am JST. Executives from Daiichi Sankyo will provide an overview of the ESMO Asia, SABCS and ASH research data and provide updates on R&D strategy. ESMO Asia, SABCS and ASH Data Highlights Highlights of data from Daiichi Sankyo’s DXd ADC portfolio at ESMO Asia 2024 include: Presentation Title Author Abstract Presentation (SGT) Datopotamab Deruxtecan (Dato-DXd) Lung Cancer Efficacy and safety of datopotamab deruxtecan (Dato-DXd) in patients with previously treated EGFR-mutated advanced non-small cell lung cancer: a pooled analysis of TROPION-Lung01 and TROPION-Lung05 M. Ahn LBA7 Proffered Paper Session Friday, December 6 10:15 - 11:45 am Breast Cancer Datopotamab deruxtecan (Dato-DXd) vs chemotherapy in patients with pre-treated inoperable/metastatic hormone receptor positive, HER2 negative breast cancer: results from TROPION-Breast01 China cohort S. Wang 38MO Mini Oral Session Saturday, December 7 2:30 - 3:40 pm ENHERTU (trastuzumab deruxtecan; T-DXd) Gastric Cancer Trastuzumab deruxtecan (T-DXd) in Chinese patients with previously treated HER2 positive advanced gastric or gastroesophageal junction adenocarcinoma: DESTINY-Gastric06 final analysis Z. Peng 129MO Mini Oral Session Saturday, December 7 9:00 - 10:40 am A phase 1b/2 open-label study evaluating trastuzumab deruxtecan (T-DXd) in combination with rilvegostomig and chemotherapy in patients with HER2 positive and HER2 low gastric or gastroesophageal junction adenocarcinoma: DESTINY-Gastric03 part 4 Y. Janjigian 264TiP Poster Session December 7, 2024 5:50 - 6:45 pm PanTumor Randomized, open-label, multicenter, phase 3 study of trastuzumab deruxtecan (T-DXd) with rilvegostomig vs standard of care in first-line HER2 expressing, locally advanced or metastatic biliary tract cancer: DESTINY-BTC01 M. Ikeda 261TiP Poster Session December 7, 2024 5:50 – 6:45 pm An open-label, multicenter, phase 2 study of trastuzumab deruxtecan (T-DXd) in patients with HER2 expressing solid tumors: DESTINY-PanTumor02 part 2 J. Lee 400TiP Poster Session December 7, 2024 5:50 – 6:45 pm Highlights of data from Daiichi Sankyo’s DXd ADC portfolio at SABCS 2024 include: Presentation Title Author Abstract Presentation (CST) ENHERTU (trastuzumab deruxtecan; T-DXd) HER2 Low & HER2 Ultralow Breast Cancer Efficacy and safety of trastuzumab deruxtecan (T-DXd) vs physician’s choice of chemotherapy by pace of disease progression on prior endocrine-based therapy: an additional analysis from DESTINY-Breast06 A Bardia LB1-04 Oral Session Tuesday, December 10 6:00 – 7:00 pm Trastuzumab deruxtecan in combination with capecitabine or capivasertib in patients with HER2 low metastatic breast cancer: a phase 1b, multicenter, open-label study (DESTINY-Breast08) K. Jhaveri P3-09-17 Poster Session Thursday, December 12 12:30 - 2:00 pm A real-world study of the effectiveness and safety of trastuzumab deruxtecan in HER2 low metastatic breast cancer among racial and ethnic minorities and older populations in the United States M. Henderson P2-12-20 Poster Session Wednesday, December 11 5:30 - 7:00 pm Agreement between the DESTINY-Breast04/06 VENTANA 4B5 HER2 IHC clinical trial assay and other comparator assays for HER2 low breast cancer: overall results of a large-scale, multicenter global ring study G. Viale P1-03-28 Poster Session Wednesday, December 11 12:30 - 2:00 pm Trastuzumab deruxtecan in HER2 low metastatic breast cancer patients with newly diagnosed or progressing brain metastases: the TUXEDO-4 phase II trial M. Marhold P3-08-21 Poster Session Thursday, December 12 12:30 - 2:00 pm Re-evaluation of human epidermal growth factor receptor 2 (HER2) immunohistochemistry (IHC) 0 or 1+ in metastatic breast cancer samples to characterize the proportion of HER2 ultralow (IHC 0 with membrane staining) S. Krishnamurthy P3-09-20 Poster Session Thursday, December 12 12:30 – 2:00 pm Valemetostat and trastuzumab deruxtecan in patients with HER2 low, previously treated, unresectable or metastatic breast cancer S. Tolaney P3-08-24 Poster Session Thursday, December 12 12:30 - 2:00 pm Phase 1b study of EZH1/2 inhibitor valemetostat in combination with trastuzumab deruxtecan in subjects with HER2 low/ultra-low/null metastatic breast cancer T. Iwase P3-12-28 Poster Session Thursday, December 12 12:30 - 02:00 pm HER2 Positive Breast Cancer Exploratory biomarker analysis of trastuzumab deruxtecan vs trastuzumab emtansine efficacy in human epidermal growth factor receptor 2-positive metastatic breast cancer in DESTINY-Breast03 W. Jacot PS8-03 Spotlight Poster Session Thursday, December 12 7:00 - 8:30 am Effects of trastuzumab deruxtecan (T-DXd) on health-related quality of life and neurological function in patients with HER2+ advanced/metastatic breast cancer with or without brain metastases: DESTINY-Breast12 results N. Harbeck PS14-10 Spotlight Poster Session Friday, December 13 7:00 – 8:30 am Real-world analysis of interstitial lung disease in patients with HER2-positive unresectable or recurrent breast cancer treated with trastuzumab deruxtecan: all-patient post-marketing surveillance study in Japan J. Tsurutani P1-02-10 Poster Session Wednesday, December 11 12:30 – 2:00 pm HER2 Expressing Breast Cancer Trastuzumab deruxtecan with pembrolizumab in previously treated HER2 expressing advanced or metastatic breast cancer: interim analyses of the breast cohorts from the open-label, multicenter, phase 1b study DS8201-A-U106 H. Rugo P5-07-29 Poster Session Friday, December 13 12:30 - 2:00 pm Patritumab Deruxtecan (HER3-DXd) HR Positive, HER2 Negative Breast Cancer Primary results of SOLTI VALENTINE: neoadjuvant randomized phase II trial of HER3-DXd alone or in combination with letrozole for high-risk hormone receptor positive/HER2-negative early breast cancer M. Oliveira LBA1-06 Oral Presentation Tuesday, December 10 6:00 - 7:00 pm ICARUS-BREAST02: safety, tolerability, and anti-tumor activity of patritumab deruxtecan (HER3-DXd) monotherapy and combinations in patients with inoperable advanced breast cancer following progression on trastuzumab deruxtecan (T-DXd) B. Pistilli P2-08-27 Poster Presentation Wednesday, December 11 5:30 - 7:00 pm Highlights of data from Daiichi Sankyo’s hematology portfolio at ASH 2024 include: Presentation Title Author Abstract Presentation (PST) VANFLYTA (quizartinib) FTL3 -ITD Positive AML Correlation of baseline gene mutations with quizartinib efficacy in patients with FLT3 -ITD positive newly diagnosed acute myeloid leukemia in the phase 3 QuANTUM-First trial M. Levis 848 Oral Presentation Monday, December 9 3:00 - 3:15 pm QuANTUM-First: effects of quizartinib on RFS, OS, CIR, and MRD in newly diagnosed patients with FMS-like tyrosine kinase 3-internal tandem duplication positive ( FLT3 -ITD+) acute myeloid leukemia who received continuation therapy M. Levis 2890 Poster Presentation Sunday, December 8 6:00 - 8:00 pm QuANTUM-First: deep-dive analysis of FMS-like tyrosine kinase 3-internal tandem duplication ( FLT3 -ITD) detection methods utilized for enrollment and longitudinal MRD detection in newly diagnosed patients with FLT3 -ITD+ acute myeloid leukemia J. Rohrbach 4278 Poster Session Monday, December 9 6:00 - 8:00 pm Anchored matching adjusted indirect treatment comparison of quizartinib vs midostaurin in newly diagnosed patients with FLT3 -ITD positive acute myeloid leukemia S. Unni 1509 Poster Session Saturday, December 7 5:30 - 7:30 pm FLT3 -ITD Negative AML Trial in progress: the phase 3, randomized, double-blind, placebo-controlled QuANTUM-Wild study of quizartinib in combination with chemotherapy and as single-agent maintenance in newly diagnosed FLT3 -ITD negative acute myeloid leukemia P. Montesinos 1504.3 Poster Session Saturday, December 7 5:30 – 7:30 pm Final results of QUIWI: a double blinded, randomized PETHEMA trial comparing standard chemotherapy plus quizartinib versus placebo in adult patients with newly diagnosed FLT3 -ITD negative AML P. Montesinos 1512 Poster Session Saturday, December 7 5:30 - 7:30 pm Enhanced validation of the FLT3 -like gene expression signature as a predictive biomarker for quizartinib response in FLT3 -ITD negative acute myeloid leukemia: expanded cohort and extended follow-up from the PETHEMA QUIWI trial A. Mosquera Orgueira 1552 Poster Session Saturday, December 7 5:30 - 7:30 pm Correlation of ELN-risk and gene mutations with quizartinib efficacy in patients with FLT3 -ITD negative newly diagnosed acute myeloid leukemia in the phase 2 QUIWI PETHEMA trial R. Rodriguez- Viega 2895 Poster Session Sunday, December 8 6:00 - 8:00 pm Valemetostat (EZHARMIA in Japan only) B-Cell & T-Cell Lymphomas Valemetostat monotherapy in patients with relapsed or refractory large B-cell lymphoma: primary results of the phase 2 VALYM study from the LYSA E. Bachy 4479 Poster Session Monday, December 9 6:00 - 8:00 pm Prediction of clinical response by phased variants in circulating tumor DNA (ctDNA) in the VALENTINE-PTCL01 trial of patients with relapsed or refractory peripheral T-cell lymphoma N. Mehta-Shah 4342 Poster Session Monday, December 9 6:00 - 8:00 pm About the ADC Portfolio of Daiichi Sankyo The Daiichi Sankyo ADC portfolio consists of seven ADCs in clinical development crafted from two distinct ADC technology platforms discovered in-house by Daiichi Sankyo. The ADC platform furthest in clinical development is Daiichi Sankyo’s DXd ADC Technology where each ADC consists of a monoclonal antibody attached to a number of topoisomerase I inhibitor payloads (an exatecan derivative, DXd) via tetrapeptide-based cleavable linkers. The DXd ADC portfolio currently consists of ENHERTU, a HER2 directed ADC, and datopotamab deruxtecan (Dato-DXd), a TROP2 directed ADC, which are being jointly developed and commercialized globally with AstraZeneca. Patritumab deruxtecan (HER3-DXd), a HER3 directed ADC, ifinatamab deruxtecan (I-DXd), a B7-H3 directed ADC, and raludotatug deruxtecan (R-DXd), a CDH6 directed ADC, are being jointly developed and commercialized globally with Merck & Co., Inc, Rahway, NJ, USA. DS-3939, a TA-MUC1 directed ADC, is being developed by Daiichi Sankyo. The second Daiichi Sankyo ADC platform consists of a monoclonal antibody attached to a modified pyrrolobenzodiazepine (PBD) payload. DS-9606, a CLDN6 directed PBD ADC, is the first of several planned ADCs in clinical development utilizing this platform. Datopotamab deruxtecan, ifinatamab deruxtecan, patritumab deruxtecan, raludotatug deruxtecan, DS-3939 and DS-9606 are investigational medicines that have not been approved for any indication in any country. Safety and efficacy have not been established. About Daiichi Sankyo Daiichi Sankyo is an innovative global healthcare company contributing to the sustainable development of society that discovers, develops and delivers new standards of care to enrich the quality of life around the world. With more than 120 years of experience, Daiichi Sankyo leverages its world-class science and technology to create new modalities and innovative medicines for people with cancer, cardiovascular and other diseases with high unmet medical needs. For more information, please visit www.daiichisankyo.com .