On June 2, 2025 Iovance Biotherapeutics, Inc. (NASDAQ: IOVA), a commercial biotechnology company focused on innovating, developing, and delivering novel polyclonal tumor infiltrating lymphocyte (TIL) therapies for patients with cancer, reported that the Journal of Clinical Oncology has published the final analysis from the Phase 2 C-144-01 clinical trial evaluating the individualized T cell therapy Amtagvi (lifileucel) in patients with advanced melanoma (Press release, Iovance Biotherapeutics, JUN 2, 2025, View Source [SID1234653613]). These five-year follow-up results are being simultaneously presented during an oral session today at the 2025 American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting.

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This five-year analysis of the C-144-01 trial represents unprecedented durability and duration of follow-up in advanced melanoma patients previously treated with anti-PD-1 and targeted therapy, where applicable. The analysis includes 153 patients from cohorts 2 and 4 of the C-144-01 trial.

One-time Amtagvi treatment demonstrated long-term benefit in heavily pretreated patients, including deep and durable responses, meaningful overall survival without further treatment, and no new or late-onset adverse events at a median follow-up of 57.8 months. The objective response rate was 31.4% with a median time to response of 1.4 months and a median duration of response of 36.5 months. Nearly one third of responders (31.3%) completed the five-year assessment with ongoing responses. The median overall survival (mOS) was 13.9 months with a five-year survival rate of 19.7%. Survival outcomes were consistent among responders, regardless of time of onset of response to Amtagvi therapy.

The observed safety profile was consistent with that of nonmyeloablative lymphodepletion and interleukin-2 administration. The incidence of AEs decreased rapidly within the first two weeks after Amtagvi infusion, and there were no new or late-onset treatment-related AEs.

Theresa Medina, M.D., medical oncologist at the University of Colorado Cancer Center on the Anschutz Medical Campus, stated, "Amtagvi has demonstrated long-term benefit and meaningful overall survival in a difficult-to-treat melanoma patient population resistant to immune checkpoint inhibitor therapy. Five years following one-time Amtagvi treatment, responses persisted or deepened during an extended treatment-free interval for some patients. Amtagvi offers a new standard of care for the advanced melanoma community and sets a new bar for one-time cell therapies with curative intent in solid tumors."

In February 2024, the U.S. Food and Drug Administration granted accelerated approval to Amtagvi for the treatment of adult patients with unresectable or metastatic melanoma previously treated with a PD-1 blocking antibody, and if BRAF V600 mutation positive, a BRAF inhibitor with or without a MEK inhibitor. The approval was based on overall response rate and duration of response from the C-144-01 clinical trial. With this approval, Amtagvi became the first one-time T cell therapy for a solid tumor cancer as well as the first approved treatment option for patients with advanced melanoma after anti-PD-1 and targeted therapy. Iovance is also conducting TILVANCE-301, a Phase 3 trial in frontline advanced melanoma to confirm clinical benefit.

About the C-144-01 Clinical Trial

C-144-01 is a global, multicenter Phase 2 study in which patients received treatment with lifileucel. The study enrolled patients with metastatic melanoma who were previously treated with at least one systemic therapy, including a PD-1 blocking antibody, and if BRAF V600 mutation positive, a BRAF inhibitor or BRAF inhibitor with MEK inhibitor. Efficacy was established on the basis of objective response rate (ORR) and duration of response (DOR) by Independent Review Committee (IRC) per Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1. The pivotal Cohort 4 and supportive Cohort 2 of Study C-144-01 enrolled patients that met the same primary eligibility criteria, had the same assessments, and had received the same regimen and AMTAGVI that was produced using the same manufacturing process, and product formulation. The final five-year analysis of C-144-01 was published in the Journal of Clinical Oncology in 2025.

About Amtagvi

AMTAGVI is a prescription medicine used to treat adults with a type of skin cancer that cannot be removed surgically or has spread to other parts of the body called unresectable or metastatic melanoma.

AMTAGVI is used when your melanoma has not responded or stopped responding to a PD-1 blocking drug either by itself or in a combination, and if your cancer is BRAF mutation positive, a BRAF inhibitor drug with or without a MEK inhibitor drug that has also stopped working.

The approval of AMTAGVI is based on a study that measured response rate. Continued approval for this use may depend on the results of an ongoing study to confirm benefit.

Important Safety Information

What is the most important information that I should know about AMTAGVI?

You will likely be in a hospital prior to and after receiving AMTAGVI.

Before taking AMTAGVI, tell your healthcare provider about all of your medical conditions, including if you:

Have any lung, heart, liver or kidney problems
Have low blood pressure
Have a recent or active infection or other inflammatory conditions including cytomegalovirus (CMV) infection, hepatitis B or C or human immunodeficiency virus (HIV) infection
Are pregnant, think you may be pregnant, or plan to become pregnant
Are breastfeeding
Notice the symptoms of your cancer are getting worse
Have had a vaccination in the past 28 days or plan to have one in the next few months
Have been taking a blood thinner
Tell your doctor about all the medications you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements.

How will I receive AMTAGVI?

AMTAGVI is made from your surgically removed tumor. Tumor derived T cells are grown in a manufacturing center at the end of which they number in the billions of cells.
Your tumor tissue is sent to a manufacturing center to make AMTAGVI. It takes about 34 days from the time your tumor tissue is received at the manufacturing center until AMTAGVI is available to be shipped back to your healthcare provider, but the time may vary. Your AMTAGVI will be provided in 1-4 patient-specific infusion bag(s) containing 100 mL to 125 mL of viable (alive) cells per bag.
After your AMTAGVI arrives at your treating institution, your healthcare provider will give you lymphodepleting chemotherapy to prepare your body.
Approximately 30 to 60 minutes before you are given AMTAGVI, you may be given other medicines including:
Medicines for an allergic reaction (anti-histamines)
Medicines for fever (such as acetaminophen)
Your AMTAGVI will be provided in 1 to 4 infusion bag(s) containing 100 mL to 125 mL of viable cells per bag. When your body is ready for AMTAGVI infusion, your healthcare provider will give AMTAGVI to you by intravenous infusion. This usually takes less than 90 minutes.
After getting AMTAGVI

Beginning 3 to 24 hours after AMTAGVI is given, you may be given up to 6 doses of IL-2 (aldesleukin) every 8 to 12 hours via intravenous infusion. Your doctor may discontinue IL-2 (aldesleukin) infusion any time if you have severe side effects.

You will have to stay in the hospital until you have completed the IL-2 (aldesleukin) treatment and you have recovered from any serious side effects associated with the AMTAGVI treatment.

You should plan to stay within 2 hours of the location where you received your treatment for several weeks after getting AMTAGVI. Your healthcare provider will check to see if your treatment is working and help you with any side effects that occur.

What are the possible side effects of AMTAGVI?

The most common side effects of the AMTAGVI treatment include chills, fever, low white blood cell count (may increase risk of infections), fatigue, low red blood cell count (may cause you to feel tired or weak), fast or irregular heartbeat, rash, low blood pressure, and diarrhea.

These are not all the possible side effects of the AMTAGVI treatment. Talk with your healthcare provider for more information about AMTAGVI. You can ask your healthcare provider for information about AMTAGVI that is written for healthcare professionals.

You may report side effects to Iovance at 1-833-400-4682, or to the FDA, at 1-800-FDA-1088 or at www.fda.gov/medwatch.

Please see Full Prescribing Information and Patient Information, including Boxed Warning, for additional Important Safety Information.

On June 2, 2025 SkylineDx, an innovative diagnostics company specializing in the research and development of molecular diagnostics for oncology, inflammatory and infectious diseases, reported a new independent study at the American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting demonstrating that its Merlin Assay (CP-GEP), a genomic test to guide treatment decisions in early-stage melanoma, can reliably identify patients with head and neck (H&N) melanoma at high risk for recurrence—even in the absence of sentinel lymph node biopsy (SLNB) (Press release, SkylineDx, JUN 2, 2025, View Source [SID1234653645]).

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SLNB may be challenging in patients with H&N melanoma due to the regional course of cranial nerves and lymphatic drainage, so the aim of the study was to validate CP-GEP’s ability to stratify these patients for their risk of recurrence. The study analyzed a subgroup of 206 patients with H&N melanoma, including a large proportion with lentigo maligna, a subtype common in older adults, from a previously published cohort of 930 stage I/II melanoma patients who did not undergo SLNB [2]. Using CP-GEP, researchers stratified patients into low- and high-risk categories based on tumor biology. Results showed a dramatic difference in outcomes:

10-year relapse-free survival (RFS) was 87.9% in CP-GEP Low-Risk patients compared to 45.8% in the High-Risk group (Hazard Ratio (HR) 7.35; p<0.001).
10-year distant metastasis-free survival (DMFS) was 94.7% for CP-GEP Low-Risk and 75.8% for High-Risk patients (HR 6.28; p<0.001).
10-year melanoma-specific survival (MSS) was 96.4% for Low-Risk vs. 74.0% for High-Risk (HR 10.22; p<0.01).
"The Merlin Assay is a major advancement in personalized care for patients with head and neck melanoma," said Principal Investigator, Teresa Amaral MD, PhD "SLNB can be technically challenging in the head and neck region. Merlin offers a powerful alternative for clinicians to make informed decisions without subjecting patients to unnecessary and potentially complicated surgical procedures."

"The findings build on prior data and highlight Merlin’s growing clinical utility in a region of the body where lymphatic mapping is less reliable and patient frailty often limits invasive procedures", said Chief Scientific Officer at SkylineDx, Dr. Jvalini Dwarkasing. "For the more than 20% of early-stage melanoma cases in the head and neck area, these results support that Merlin helps fill a critical gap in risk stratification and care planning."

About the Merlin Assay (CP-GEP)

CP-GEP is a non-invasive prediction model for cutaneous melanoma patients and is the only commercially available GEP test that combines clinicopathologic (CP) variables with gene expression profiling (GEP) into a single integrated algorithm. This CP-GEP model is also the only GEP test that provides a binary stratification of all patients based on being High or Low Risk for metastasis and thereby assign them to the appropriate surgical action categories as listed in evidence-based cancer treatment, prevention and screening guidelines. The advanced CP-GEP model was developed by Mayo Clinic and SkylineDx and is the latest commercially launched GEP test, which has been clinically validated in multiple studies on a global basis. The test has been launched in the United States and Europe as Merlin. SkylineDx collaborates with diagnostic service providers globally to bring this test to market and increase patient access. More information (including references) may be obtained at www.falconprogram.com and www.merlinmelanomatest.com.

On June 2, 2025 BeOne Medicines Ltd. (NASDAQ: ONC; HKEX: 06160; SSE: 688235), a global oncology company, reported new clinical data from its emerging breast cancer pipeline at the American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting in Chicago (Press release, BeOne Medicines, JUN 2, 2025, View Source [SID1234653661]). Poster presentations feature preliminary results of the dose escalation studies of two investigational molecules: BG-C9074, a novel B7-H4-targeting antibody-drug conjugate (ADC) in patients with advanced solid tumors, including breast cancer, and BG-68501, a cyclin-dependent kinase-2 inhibitor (CDK2i), in HR+/HER2- breast cancer patients with prior CDK4/6i exposure.

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"Presenting the first clinical data for two novel breast cancer candidates at ASCO (Free ASCO Whitepaper) 2025 marks a pivotal moment for BeOne," said Mark Lanasa, M.D., Ph.D., Chief Medical Officer, Solid Tumors at BeOne. "These early results highlight the strong potential of our B7-H4-targeting ADC and CDK2 inhibitor to address critical gaps in breast cancer treatment. Alongside our advancing CDK4 inhibitor, they represent just the beginning of a pipeline built on targeted, biology-driven innovation. As we debut our new identity as BeOne, this milestone reflects the momentum behind our science and our commitment to delivering impactful therapies to cancer patients worldwide."

BeOne is advancing a robust pipeline of differentiated investigational medicines for breast cancer that may both effectively combat the disease and potentially improve quality of life for patients receiving treatment.

BG-C9074, a B7-H4-targeting ADC (Abstract #3033)

BeOne presented initial results of the ongoing first-in-human, Phase 1a dose escalation study of BG-C9074 monotherapy in 78 patients with advanced solid tumors, of which more than a quarter were breast cancer patients. BG-C9074, an investigational topoisomerase I inhibitor ADC that targets the B7-H4 protein, which is broadly expressed in breast and gynecologic cancers, is designed with an innovative drug linker to deliver a potent cancer-killing drug directly to the cancer cells.

With limited follow-up among the 56 efficacy-evaluable patients, preliminary clinical responses were observed at multiple dose levels across various tumor types without selection for B7-H4 expression in these heavily pretreated patients. Confirmed overall response rate (ORR) was 16.1% (9/56; 95% CI: 7.6%–28.3%), with 9 confirmed partial responses; unconfirmed ORR was 25.0% (14/56; 14.4%-38.4%) (n=14 partial responses). Confirmed disease control rate (DCR) was 73.2% (59.7%-84.2%) and confirmed clinical benefit rate (CBR) was 17.9% (8.9%-30.4%). Pharmacokinetics (PK) were observed to be approximately dose-proportional across dose levels.

BG-C9074 showed a manageable safety and tolerability profile in patients with B7-H4 advanced solid tumors, including breast cancer. There were 5 dose-limiting toxicities (DLTs) reported among 3 dose levels, all related to treatment: grade 3 fatigue (n=1); grade 3 febrile neutropenia (n=2); and grade 4 platelet count decreased (n=2). The most common treatment-emergent adverse events (TEAEs) were nausea, fatigue, and neutropenia*. The most common grade ≥3 TEAEs were neutropenia and thrombocytopenia†. There were no TEAEs leading to treatment discontinuation or death.

These data support the continued development of BG-C9074 in patients with advanced solid tumors. (NCT06233942)

BG-68501, a CDK2 inhibitor (Abstract# 3115)

Dose-escalation data from the first-in-human, Phase 1a study of a novel CDK2 inhibitor, BG-68501, were presented as a poster today. BG-68501 is designed to address elevated CDK2 activity as well as cyclin E1-driven upregulation, two key resistance mechanisms that often limit the effectiveness of CDK4/6 inhibitors in treating HR+/HER2- breast cancer. CDK inhibitors target checkpoint proteins that control cell division to stop the growth of cancer cells.

A total of 57 enrolled patients with advanced solid tumors, including 19 patients with HR+/HER2- metastatic breast cancer, received BG-68501 as monotherapy or in combination with fulvestrant in escalating dose cohorts (all received prior CDK4/6i).

Of the 37 efficacy-evaluable patients (all with monotherapy), unconfirmed overall response rate (ORR) was 5.4% (2/37; 95% CI: 0.7%–18.2%). Two extensively pretreated patients (5.4%) experienced unconfirmed partial response (PR), 15 patients (40.5%) had stable disease (SD), 15 patients (40.5%) had progressive disease (PD), and 5 patients (13.5%) were not evaluable/not assessed. Of the 2 patients with PR, both were breast cancer patients, and one was ongoing with treatment at the time of data cutoff, while the other had discontinued treatment. Unconfirmed clinical benefit rate (CBR) was 8.1% (3/37; 95% CI: 1.7%-21.9%) and unconfirmed disease control rate (DCR) was 45.9% (17/37; 95% CI: 29.5%-63.1%). BG-68501 demonstrated a linear PK profile consistent with preclinical data and signs of pharmacodynamic responses.

BG-68501 demonstrated a manageable safety and tolerability profile, with no DLTs observed to date during dose escalation. The most common TEAEs were vomiting, nausea, and fatigue, and TEAEs leading to treatment discontinuation occurred in 4 patients (7%) across all dose levels. There were no TEAEs leading to death.

The data support continued development of BG-68501 as a next-line option for tumors with CDK2 dependency. (NCT06257264)

For additional information about our presence at the 2025 ASCO (Free ASCO Whitepaper) Annual Meeting, please visit our meeting hub: congress.beonemedicines.com.

BeOne will host an investor R&D Day on June 26 at 8:30 am ET covering its deep and broad global innovation pipeline and platforms, as well as the Company’s vision, differentiated capabilities, and value creation drivers. A live webcast will be accessible from the investors section of BeOne’s website at View Source, View Source, or View Source An archived replay will be available for 90 days following the event.

About Our Breast Cancer Pipeline

BeOne is advancing a robust portfolio of investigational medicines for breast cancer, including three molecules in clinical development – two cyclin-dependent kinase (CDK) inhibitors, BGB-43395, a CDK4 inhibitor, and BG-68501, a CDK2 inhibitor, and an antibody-drug conjugate (ADC), BG-C9074. BeOne also plans to evaluate the potential of BCL2 inhibition in breast cancer, with next-generation BCL2 inhibitor, BGB-21447, expected to begin clinical testing in solid tumor indications soon. Multispecific antibodies and targeted protein degraders with potential applications in breast cancer are among the preclinical assets being developed.

About Breast Cancer

Breast cancer accounts for close to one in four cancer cases and one in six cancer deaths in women worldwide.1 Globally, breast cancer is the second most common cancer and the fourth highest cause of cancer mortality as well as the leading cause of cancer death in women.1 More than 2.3 million patients were diagnosed with breast cancer in 2022, and over 666,000 deaths were reported globally.1 Approximately two-thirds of breast cancer cases are the HR+/HER2- subtype.

On June 2, 2025 Kura Oncology, Inc. (Nasdaq: KURA, "Kura") and Kyowa Kirin Co., Ltd. (TSE: 4151, "Kyowa Kirin") reported the presentation of positive pivotal results from the KOMET-001 Phase 2 registration-directed trial of ziftomenib, a once-daily, oral investigational menin inhibitor, in patients with relapsed/refractory (R/R) NPM1-mutant (NPM1-m) acute myeloid leukemia (AML) in an oral session today at the 2025 American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting being held in Chicago, IL from May 30 – June 3, 2025 (Press release, Kura Oncology, JUN 2, 2025, View Source [SID1234653614]).

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"We are delighted to announce positive pivotal data from the KOMET-001 trial in R/R NPM1-mutated AML patients treated with ziftomenib," said Troy Wilson, Ph.D., J.D., President and Chief Executive Officer of Kura Oncology. "NPM1 mutations are among the most common in AML, representing approximately 30% of cases, and there are no FDA-approved therapies specifically for this patient population. With these encouraging results and a PDUFA target action date of November 30, 2025, we and our partners at Kyowa Kirin look forward to supporting FDA with its review of the ziftomenib New Drug Application (NDA) and are well-positioned to meaningfully impact relapsed or refractory patients with NPM1 mutations."

"Relapsed or refractory NPM1-mutated AML is a highly challenging disease with a poor prognosis and an urgent need for new treatments," said Eunice Wang, M.D., Chief of Leukemia Service, Professor of Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, NY. "The promising results for ziftomenib in this heavily pretreated population are highly encouraging. Notably, the clinically meaningful minimal residual disease (MRD)-negative responses observed as well as the similar response rates seen regardless of prior therapies, including hematopoietic stem cell transplantation (HSCT) and venetoclax, hold great promise for the potential use of ziftomenib in patients with relapsed and refractory NPM1-mutated AML."

The KOMET-001 Phase 2 population included 92 adult patients with R/R NPM1-m AML. The median age was 69 (range: 33 to 84). Patients were heavily pretreated, with 33% having received three or more prior lines of therapy (median prior lines: 2) and 59% having been previously treated with venetoclax.

A complete remission (CR) plus CR with partial hematological recovery (CRh) rate of 23% (21/92) was observed among patients with R/R NPM1-m AML in the Phase 2 portion of the KOMET-001 trial. Among those 21 patients who achieved CR/CRh, 13 had a CR and 8 had a CRh. The median duration of CR/CRh responses was 3.7 months (95% CI: 1.9, not estimable (NE)) and the restricted mean duration of response was 4.3 months (95% CI: 3.1, 5.6) at the time of the data cutoff. MRD status was assessed in 19 of 21 patients who achieved CR/CRh, and 63% (12/19) of these patients were MRD-negative.

Comparable CR/CRh rates were observed across pre-specified subgroups, regardless of prior HSCT, prior venetoclax or FLT3/IDH co-mutations. Additional patient benefit beyond CR/CRh was observed with a rate of transfusion conversion of 21% (17/82; 95% CI: 13-31) and a rate of maintenance of transfusion independence of 20% (2/10; 95% CI: 3-56). A median OS of 16.4 months (95% CI, 9.6–20.4) was observed for responders (patients who achieved CR, CRh, CRi/CRp, MLFS or PR) and a median overall survival (OS) of 3.5 months (95% CI, 2.5–4.0) was observed among non-responders.

The safety population included 112 adult patients with R/R NPM1-m AML from the pooled Phase 1b and Phase 2 portions of the KOMET-001 trial. The safety profile observed with ziftomenib in this population was consistent with previously reported data. Treatment-related adverse events (TRAEs) led to treatment discontinuations in 3% of patients. TRAEs of Grade ≥3 which occurred in more than 10% of patients were limited to differentiation syndrome (DS, 13%), which was well managed by protocol-specified mitigation strategies and no Grade 4/5 treatment-related DS was observed. Although QTc prolongation (1 Gr2; 2 Gr3) was reported in three patients per investigator assessment, all three patients were on concomitant medications associated with QTc prolongation, two had electrolyte abnormalities and one had a prior diagnosis of atrial fibrillation.

"Beyond ziftomenib’s clinical activity, we are highly encouraged by its consistent safety and tolerability profile," said Mollie Leoni, MD, Chief Medical Officer of Kura Oncology. "Notably, the low rate of myelosuppression, low discontinuation rate, lack of clinically significant QTc prolongation, absence of drug-drug interactions, and effective management of differentiation syndrome underscore ziftomenib’s potentially favorable benefit-risk profile for patients with relapsed or refractory NPM1-mutated AML."

"The data presented at ASCO (Free ASCO Whitepaper) strengthen our conviction that ziftomenib has potential to become a meaningful treatment option for patients with relapsed or refractory AML with NPM1 mutations — patients who often face limited treatment options and significant uncertainty regarding their prognosis," said Takeyoshi Yamashita, Ph.D., Executive Vice President and Chief Medical Officer of Kyowa Kirin. "Encouraged by the favorable safety, tolerability, and promising clinical activity observed thus far, Kyowa Kirin, in collaboration with Kura, is working with urgency and purpose to bring ziftomenib monotherapy to patients as swiftly and responsibly as possible."

Virtual Investor Event

Kura will host a virtual investor event featuring company management and investigators from the KOMET-001 trial of ziftomenib in R/R NPM1-m AML at 7:30pm ET / 4:30pm PT on Monday, June 2, 2025. Those who would like to participate may access the live webcast here, or register in advance for the teleconference here.The event can also be accessed on the Investors section of Kura’s website at www.kuraoncology.com. An archived replay will be available shortly after the conclusion of the live event.

On June 2, 2025 Amgen (NASDAQ:AMGN) reported new interim results from the global Phase 3 DeLLphi-304 trial showing IMDELLTRA (tarlatamab-dlle) reduced the risk of death by 40% and significantly extended median overall survival (OS) by more than five months compared to standard-of-care (SOC) chemotherapy in patients with small cell lung cancer (SCLC) who progressed on or after one line of platinum-based chemotherapy (median OS: 13.6 vs 8.3 months; hazard ratio [HR], 0.60; 95% confidence interval [CI]: 0.47, 0.77; P < 0.001) (Press release, Amgen, JUN 2, 2025, View Source [SID1234653630]). The results will be presented at the 2025 American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting (LBA8008) and have been published in The New England Journal of Medicine.

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"Small cell lung cancer is an extraordinarily aggressive and difficult-to-treat disease, and those living with SCLC often experience limited benefit with first line treatment," said Jay Bradner, M.D., executive vice president, Research and Development, at Amgen. "These data underscore IMDELLTRA’s potential to transform patient outcomes and the small cell lung cancer treatment paradigm."

At the planned interim analysis, DeLLphi-304 met its primary OS endpoint and key secondary progression-free survival (PFS) endpoint. Additionally, IMDELLTRA significantly improved patient-reported outcomes (PRO) for cancer-related symptoms of dyspnea and cough compared to the control arm.

"The data from DeLLphi-304 mark a major milestone for people with relapsed small cell lung cancer. Tarlatamab is associated with significant improvements in both overall and progression-free survival over standard chemotherapy in patients with recurrent or progressive disease," said Charles Rudin, M.D., Ph.D., deputy director, Memorial Sloan Kettering Cancer Center. "This study also provides confirmatory data on management of potential toxicities associated with bispecific T-cell engager therapies in a large patient cohort, which is crucial to continuing to improve the experience of patients treated with these medicines."

At a median follow-up of 11.2 months for IMDELLTRA and 11.7 months for the control arm, data from the global Phase 3 DeLLphi-304 clinical trial showed a median OS of 13.6 months with IMDELLTRA compared to 8.3 months with local SOC chemotherapy (HR, 0.60; 95% CI: 0.47, 0.77; P < 0.001). Median PFS was statistically significantly improved for IMDELLTRA compared to local SOC chemotherapy (median PFS: 4.2 vs 3.7 months; HR, 0.71; 95% CI: 0.59, 0.86; P < 0.001).

The safety profile for IMDELLTRA in DeLLphi-304 was consistent with its known profile. In DeLLphi-304, lower rates of grade 3 or higher treatment-related adverse events (TRAEs) occurred with IMDELLTRA versus the control arm (27% vs 62%) and discontinuations due to TRAEs were lower with IMDELLTRA compared to the control arm (3% vs 6%). The most common grade 3 or greater TRAEs were neutropenia (4%) and lymphopenia (4%) with IMDELLTRA and anemia (28%) and neutropenia (22%) with local SOC chemotherapy. Cytokine release syndrome (CRS) with IMDELLTRA primarily occurred after receipt of one of the first two doses and was primarily low grade (42% Grade 1; 13% Grade 2; 1% Grade 3) and manageable. No Grade 4 or Grade 5 CRS events were reported. CRS profiles following the first two doses of IMDELLTRA, including incidence, severity, outcome, time to intervention and time to resolution, were similar among patients who were monitored for 6 to 8 hours (n=43) and those who were monitored for 48 hours (n=209).

DeLLphi-304 is a global Phase 3, randomized, controlled, open-label clinical trial evaluating the efficacy and safety of IMDELLTRA as a treatment for patients living with SCLC who progressed on or after a single line of platinum-based chemotherapy.1 Five hundred and nine patients were randomized to receive either IMDELLTRA or local SOC chemotherapy (topotecan in all countries except Japan; lurbinectedin in the U.S., Canada, Australia, Singapore, Korea; and amrubicin in Japan).1,2 The primary outcome measure of the trial is OS.1 Key secondary outcome measures include PFS and PROs including disease-related symptoms, physical function and quality of life.1 DeLLphi-304 is intended to serve as the confirmatory trial for IMDELLTRA’s accelerated approval for the treatment of adult patients with extensive-stage small cell lung cancer (ES-SCLC) with disease progression on or after platinum-based chemotherapy.

About IMDELLTRA (tarlatamab-dlle)
IMDELLTRA is a first-in-class targeted immunotherapy engineered by Amgen researchers to bind to both DLL3 on tumor cells and CD3 on T cells, thereby activating T cells to kill DLL3-expressing SCLC cells. This results in the formation of a cytolytic synapse with lysis of the cancer cell.3,4 DLL3 is a protein that is expressed on the surface of SCLC cells in ~85-96% of patients with SCLC, but is minimally expressed on healthy cells, making it an exciting target.5,6

IMDELLTRA (tarlatamab-dlle) U.S. Indication
IMDELLTRA (tarlatamab-dlle) is indicated for the treatment of adult patients with extensive-stage small cell lung cancer (ES-SCLC) with disease progression on or after platinum-based chemotherapy.

This indication is approved under accelerated approval based on overall response rate and duration of response. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial(s).

About Small Cell Lung Cancer (SCLC)
SCLC is one of the most aggressive and devastating solid tumor malignancies, with a 5-10% five-year relative survival rate across all stages combined.7 SCLC comprises about 15% of the more than 2.4 million patients diagnosed with lung cancer worldwide each year.8-10 Despite initial high response rates to first-line platinum-based chemotherapy, most patients quickly relapse within months and require subsequent treatment options.9

About Tarlatamab Clinical Trials
Amgen’s robust tarlatamab development program includes the DeLLphi clinical trials, which evaluate tarlatamab as a monotherapy and as part of combination regimens, including in both earlier stages of SCLC and earlier lines of treatment.

Tarlatamab is being investigated in multiple studies including DeLLphi-303, a Phase 1b study investigating tarlatamab in combination with standard-of-care therapies in first-line ES-SCLC; DeLLphi-304, a randomized Phase 3 study comparing tarlatamab monotherapy with standard-of-care chemotherapy in second-line treatment of SCLC; DeLLphi-305, a randomized Phase 3 study comparing tarlatamab in combination with durvalumab versus durvalumab alone as first-line maintenance treatment in ES-SCLC; DeLLphi-306, a randomized placebo-controlled Phase 3 study of tarlatamab following concurrent chemoradiotherapy in limited-stage SCLC; DeLLphi-308, a Phase 1b study evaluating subcutaneous tarlatamab in second line or later ES-SCLC; DeLLphi-309, a Phase 2 study evaluating alternative intravenous dosing regimens with tarlatamab in second-line ES-SCLC; DeLLphi-310, a Phase 1b study of tarlatamab in combination with YL201 with or without anti-programmed death ligand 1 (PD-L1) in patients with ES-SCLC; and DeLLphi-312, a Phase 3 study evaluating tarlatamab as an induction and maintenance therapy in first-line treatment of ES-SCLC in combination with carboplatin, etoposide, and durvalumab.