On June 12, 2025 Autolus Therapeutics plc (Nasdaq: AUTL), an early commercial-stage biopharmaceutical company developing, manufacturing and delivering next-generation programmed T cell therapies, reported updated long term data (up to approximately three years of follow up) from the FELIX study of obecabtagene autoleucel (obe-cel) in adult patients with relapsed/refractory (r/r) B-cell acute lymphoblastic leukemia (B-ALL), to be presented in an oral presentation at the European Hematology Association (EHA) (Free EHA Whitepaper) Congress between June 12-15, 2025, in Milan, Italy (Press release, Autolus, JUN 12, 2025, View Source [SID1234653855]). Autolus will also present an additional oral and poster presentation, the details of which are included below.

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"Obe-cel’s durability of response without any subsequent therapy in two out of every five responders is a key factor leading the transformation of therapy for adult r/r B-ALL patients. At a median follow up of 33 months, we are encouraged to see a continuation of the long-term plateau we observed at the last data cut," said Dr. Christian Itin, Chief Executive Officer of Autolus. "A well-tolerated, effective, durable treatment option for ALL patients who often have a poor prognosis and have had multiple prior treatments is of significant clinical benefit."

Oral S113:
Title: Can CAR T-cell therapy be a definitive treatment for adult r/r B-ALL without transplant? Long-term findings and predictors of sustained remission for obecabtagene autoleucel
Session Name: s447 Immunotherapy and CAR-T cells for ALL
Session room: Coral 6
Session Date and Time: Sunday, June 15; 11:00 – 12:15 CEST
Presenting Author: Jae H Park, MD

Summary: At the updated median follow up of 32.8 months, 38.4% of responders were in ongoing remission without consolidative SCT or other therapies (versus the previously reported 40% at a median follow up of 21.5 months). The 24-month probability of Event Free Survival was 43%, and for Overall Survival was 46%, with an emerging long-term plateau observed. A substantial subset of patients benefit from standalone treatment with obe-cel, achieving long-term remission. No new safety signals or Grade ≥3 secondary malignancies were observed at the extended follow-up. These results suggest that obe-cel may be a definitive treatment for some patients with r/r B-ALL – specific analysis will be needed to determine which patients may need additional treatments.

The multivariate analysis demonstrated that Philadelphia chromosome-positive disease, earlier obe-cel use, and relapsed disease correlated with achieving higher remission rates. Lower disease burden at lymphodepletion and ongoing CAR T-cell persistence were independent factors associated with long-term remission and survival.

Oral S114:
Title: Efficacy and Safety Outcomes of Obecabtagene Autoleucel (obe-cel) Stratified by Age in Patients with r/r B-ALL
Session Name: Immunotherapy and CAR-T cells for ALL
Session Room: Coral 6
Session Date and Time: Sunday, June 15; 11:00 – 12:15 CEST
Presenting Author: Bijal D. Shah, MD

Summary: Obe-cel treatment was associated with deep and durable remissions resulting in favorable overall remission rate, event free survival, and overall survival with low incidence of Grade ≥3 CRS and ICANS in both age groups (<55 years and ≥55 years). These findings indicate that obe-cel is effective and has a positive benefit and risk profile regardless of patient age, including in older adults with R/R B-ALL.

Poster PF378:
Title: Predicting Hematotoxicity Risk and Outcomes in Relapsed/Refractory B-Cell Acute Lymphoblastic Leukemia (r/r B-All): Should Hematotox Models be CAR Specific Rather than Disease Specific
Session Title: Poster Session 1
Session date and time: Friday, June 13; 18:30 – 19:30 CEST.
Presenting Author: Claire Roddie, MD

Summary: Although both the CAR-Hematotox (CAR-HT) model, and the ALL-Hematotox (ALL-HT) model show potential, ALL-HT appears to improve risk stratification and may be a better predictor of response, survival and safety outcomes in adult patients with r/r B-ALL treated with obe-cel, than CAR-HT. Taken together with other published reports, our data suggest that the strength of HT-model predictions may be CAR T-cell product specific. Further analyses are needed.

On June 12, 2025 BeOne Medicines Ltd. (NASDAQ: ONC; HKEX: 06160; SSE: 688235), a global oncology company, reported that it will present new clinical data from three cornerstone hematology assets at the European Hematology Association (EHA) (Free EHA Whitepaper) Congress (Press release, BeOne Medicines, JUN 12, 2025, View Sourcenews/beone-medicines-showcases-breakthrough-data-in-cll-and-mcl-at-eha-2025/b755b055-956b-40e5-8a80-763881ca3f12" target="_blank" title="View Sourcenews/beone-medicines-showcases-breakthrough-data-in-cll-and-mcl-at-eha-2025/b755b055-956b-40e5-8a80-763881ca3f12" rel="nofollow">View Source [SID1234653854]). Four oral presentations highlight the promising clinical activity of BeOne’s next-generation BCL2 inhibitor sonrotoclax, BTK protein degrader BGB-16673, and the backbone of our hematology franchise, BTK inhibitor BRUKINSA (zanubrutinib), which has the broadest label globally of any approved BTK inhibitor. These data reinforce the company’s strategic vision to redefine the standard of care for B-cell malignancies.

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"The data presented at EHA (Free EHA Whitepaper) 2025 underscore the strength of BeOne’s comprehensive hematology pipeline, built on the success of BRUKINSA, the only BTK inhibitor to demonstrate superior progression-free survival over ibrutinib in a Phase 3 trial,1" said Lai Wang, Ph.D. Global Head of R&D at BeOne. "With our potentially best-in-class BCL2 inhibitor, sonrotoclax, and first-in-class BTK degrader, BGB-16673, we are advancing innovative therapies aimed at addressing resistance mechanisms and improving outcomes for patients with B-cell malignancies."

The data presented at EHA (Free EHA Whitepaper) 2025 support the ongoing advancement of sonrotoclax and BGB-16673 into Phase 3 studies and lay the groundwork for BeOne’s first regulatory submissions for these programs. The company’s integrated development approach—anchored in differentiated mechanisms and translational science—positions its programs to address key areas of unmet need in hematologic oncology.

"While existing therapies have improved outcomes in CLL and related malignancies, many patients still relapse or develop resistance and continue to face limited options," said Stephan Stilgenbauer, Professor of Medicine and Medical Director of the Comprehensive Cancer Center Ulm (CCCU), Head of the Early Clinical Trials Unit (ECTU), and Head of the Division of CLL Dept. of Internal Medicine III at Ulm University. "The updated data presented at EHA (Free EHA Whitepaper) underscore the potential of novel approaches, including BTK degradation and BCL2-based combinations, to overcome known mechanisms of resistance and expand treatment options for patients."

Sonrotoclax + BRUKINSA Demonstrates Deep Responses in CLL and MCL

BeOne’s data will highlight the emerging potential of its next-generation assets to address the unmet needs of patients with B-cell malignancies.

Updated results from Phase 1 studies evaluating sonrotoclax in combination with BRUKINSA in patients with relapsed/refractory (R/R) chronic lymphocytic leukemia (CLL)/small lymphocytic lymphoma (SLL) and with R/R mantle cell lymphoma (MCL) demonstrated consistent, deep responses and a manageable safety profile. Sonrotoclax is well-positioned to improve key aspects of the BCL2 inhibitor class and has demonstrated robust and durable antitumor activity and a tolerable safety profile across all dose levels.

R/R CLL/SLL (Oral Presentation S159):
Overall response rate (ORR): 96%; complete response (CR): 52% across all dose levels
Undetectable minimal residual disease (uMRD) was achieved in 82% of patients overall, with responses deepening over time
No tumor lysis syndrome (TLS) or febrile neutropenia observed
R/R MCL (Oral Presentation S234):
ORR: 79%; CR rate: 66%, with 84% of responders in ongoing response at data cutoff
No TLS or atrial fibrillation/flutter reported; the most common grade ≥3 adverse event was neutropenia (19.6%)
Robust Early Results in CLL and WM with Potentially First-in-Class BTK Degrader

As the most clinically advanced BTK degrader, BGB-16673 continues to show potential in patients with various hematological malignancies. Updated data from the ongoing Phase 1 CaDAnCe-101 study of BGB-16673 in R/R CLL/SLL and R/R Waldenström macroglobulinemia (WM) showed substantial antitumor activity and a tolerable safety profile across heavily pretreated populations.

R/R CLL/SLL (Oral Presentation S158):
ORR: 84.8% across all dose levels and 93.8% at the recommended phase 2 dose of 200mg
Patients were heavily pretreated, with most previously treated with BTK and BCL2 inhibitors. The median number of prior therapies was four. Responses deepened over time
Grade ≥3 adverse events included neutropenia (24%) and pneumonia (11%); no reported deaths were attributed to study drug
R/R Waldenström Macroglobulinemia (Oral Presentation S231):
ORR: 84.4%; major response rate: 75.0%; very good partial response rate (VGPR): 31.3%
Rapid onset of response (median: 1.0 month), with continued deepening over time
Efficacy observed across genetic backgrounds and prior BTKi exposure
Most common grade ≥3 TEAE was neutropenia/neutrophil count decreased (31%); no reported atrial fibrillation or febrile neutropenia.
BRUKINSA Monotherapy Showed Sustained OS and PFS Benefit

Data from Arm D of the SEQUOIA Phase 3 trial will also be presented at the meeting (Abstract PS1566), demonstrating that treatment with BRUKINSA plus venetoclax has the potential to drive progression-free survival and overall deep and durable responses across the frontline CLL patient spectrum, including patients with high-risk mutational status. SEQUOIA Arm D investigated BRUKINSA plus venetoclax in 114 patients with treatment-naïve (TN) CLL / SLL with or without del(17p) and/or TP53 high-risk mutations. At a median follow-up of 31.2 months, the combination induced a high 24-month progression-free survival (PFS) rate of 92% (95% CI, 85-96%) and an impressive overall response rate (ORR) of 97%. The 24-month overall survival (OS) rate was 96% (95% CI, 90%-98%). Notably, these benefits were observed regardless of del(17p)/TP53 mutational status. The safety profile of BRUKINSA was consistent with the results of prior studies with no new safety signals identified.

Arm C of the SEQUOIA study investigated BRUKINSA monotherapy in patients with TN CLL / SLL and del(17p) mutations, representing the largest prospective cohort of CLL/SLL patients with del(17p), will be presented at EHA (Free EHA Whitepaper) (Abstract: PS1565). At a median follow-up of over 5.5 years (65.8 months), most patients remained progression-free. Notably, at 60 months, 72.2% of patients who received BRUKINSA remained progression-free (95% CI, 62.4, 79.8). When adjusted for the impact of the COVID-19 pandemic, 73.0% of patients in the cohort remained progression-free (95% CI, 63.3, 80.6) at 60 months. The 60-month OS rate was 85.1% (95% CI, 76.9, 90.6) and 87.0% (95% CI, 79.0, 92.1) when adjusted for COVID-19. At the time of data cut-off, the ORR was 97.3%, and 62.2% of patients were still receiving treatment with BRUKINSA. The safety profile of BRUKINSA was consistent with the results of prior studies with no new safety signals identified.

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

About Sonrotoclax (BGB-11417)

Sonrotoclax is designed to block the B-cell lymphoma 2 (BCL2) protein, which is one of several proteins that help cancer cells survive. It is part of a group of drugs called BH3 mimetics, which mimic natural cell death signals. Studies in the lab and during early drug development have shown that sonrotoclax is a potent and specific inhibitor of BCL2 with a short half-life and no accumulation. Sonrotoclax has shown promising clinical activity across a range of B-cell malignancies, and more than 1,900 patients have been enrolled to date across the global development program. The U.S. Food and Drug Administration (FDA) granted sonrotoclax Fast Track Designation for the treatment of adult patients with mantle cell lymphoma (MCL) and Waldenström macroglobulinemia (WM).

About BGB-16673

BGB-16673 is an orally available Bruton’s tyrosine kinase (BTK) targeting protein degrader from BeOne’s chimeric degradation activation compound (CDAC) platform. BGB-16673 is designed to promote the degradation, or breakdown, of both wildtype and mutant forms of BTK, including those that commonly result in resistance to BTK inhibitors in patients who experience progressive disease. BGB-16673 is the most advanced BTK protein degrader in the clinic, with an extensive global clinical development program. The U.S. Food and Drug Administration (FDA) granted Fast Track Designation to BGB-16673 for the treatment of adult patients with relapsed or refractory (R/R) chronic lymphocytic leukemia or small lymphocytic lymphoma (CLL/SLL), and adult patients with R/R mantle cell lymphoma (MCL).

About BRUKINSA (zanubrutinib)

BRUKINSA is an orally available, small molecule inhibitor of Bruton’s tyrosine kinase (BTK) designed to deliver complete and sustained inhibition of the BTK protein by optimizing bioavailability, half-life, and selectivity. With differentiated pharmacokinetics compared with other approved BTK inhibitors, BRUKINSA has been demonstrated to inhibit the proliferation of malignant B cells within a number of disease-relevant tissues.

BRUKINSA has the broadest label globally of any BTK inhibitor and is the only BTK inhibitor to provide the flexibility of once or twice daily dosing. Additionally, BRUKINSA is also the only BTK inhibitor to demonstrate PFS superiority to a first-generation BTK inhibitor in a Phase 3 study.

The global BRUKINSA clinical development program includes about 7,100 patients enrolled in 30 countries and regions across more than 35 trials. BRUKINSA is approved for at least one indication in more than 75 markets, and more than 200,000 patients have been treated globally.

Select Important Safety Information

Serious adverse reactions, including fatal events, have occurred with BRUKINSA, including hemorrhage, infections, cytopenias, second primary malignancies, cardiac arrhythmias, and hepatotoxicity (including drug-induced liver injury).

In the pooled safety population (N=1729), the most common adverse reactions (≥30%), including laboratory abnormalities, in patients who received BRUKINSA were neutrophil count decreased (51%), platelet count decreased (41%), upper respiratory tract infection (38%), hemorrhage (32%), and musculoskeletal pain (31%).

Please see full U.S. Prescribing Information including U.S. Patient Information.

The information provided in this press release is intended for a global audience. Product indications vary by region.

On June 12, 2025 Blueprint Medicines Corporation (Nasdaq: BPMC) reported data presentations reflecting over a decade of collaboration with clinical experts and patient advocates to transform the treatment of systemic mastocytosis (SM) (Press release, Blueprint Medicines, JUN 12, 2025, View Source [SID1234653853]). Key results continue to position AYVAKIT/AYVAKYT (avapritinib) as the durable standard of care across indolent and advanced SM, and highlight the real-world burden of the disease, reinforcing the importance of treating with a therapy that addresses the root cause of SM. These data will be reported at the 2025 European Hematology Association (EHA) (Free EHA Whitepaper) (EHA2025) Hybrid Congress, being held June 12 to 15 in Milan, Italy, and the European Academy of Allergy and Clinical Immunology (EAACI) Congress 2025, being held June 13 to 16 in Glasgow, United Kingdom.

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"Our presentations feature large patient populations from the PIONEER, PATHFINDER and EXPLORER trials, with follow-up reaching up to five years in ISM and up to 6.5 years in advanced SM, reflecting both the favorable long-term benefits of AYVAKIT and the unprecedented datasets we have amassed over time," said Becker Hewes, M.D., Chief Medical Officer at Blueprint Medicines. "AYVAKIT has shown transformative clinical outcomes for patients across the spectrum of SM, including sustained disease control in ISM and prolonged survival in advanced SM. These compelling results have translated into real-world practice, with clinicians expanding their view of who is an appropriate candidate for disease-modifying therapy after positive AYVAKIT experiences, and treatment durations trending toward multiple years."

PIONEER Three-Year Data: Durable Clinical Benefits and Consistent Safety Profile with Long-Term AYVAKIT Use in ISM

As previously presented,1 AYVAKIT demonstrated robust improvements through 144 weeks in overall symptom and symptom domain measures (skin, gastrointestinal, neurocognitive) representative of real-world patient impacts. AYVAKIT showed a well-tolerated safety profile and a low discontinuation rate due to treatment-related adverse events (TRAEs; 3 percent) with a median of three years of exposure, and some patients out to five years on therapy. Common TRAEs included low-grade edemas, headache and nausea.
In newly reported data, AYVAKIT showed sustained clinical benefits across quality-of-life measures that reflect general health status and are broadly recognized by allergists/immunologists, validating previously presented results from the disease-specific, Mastocytosis Quality of Life (MC-QoL) questionnaire.
This data presentation follows the May 2025 online publication of PIONEER two-year efficacy and safety data in The Journal of Allergy and Clinical Immunology: In Practice.

PATHFINDER/EXPLORER Multi-Year Data: Long-Term Survival Benefits of AYVAKIT in Advanced SM

AYVAKIT showed prolonged overall survival (OS) in PATHFINDER and EXPLORER, when indirectly compared to real-world data for midostaurin from the German Registry on Disorders of Eosinophils and Mast Cells (GREM).
AYVAKIT led to meaningful survival benefits in patients across all prognostic categories (low, intermediate and high risk), per the Revised Mutation-Adjusted Risk Score (MARS-R) – a new OS risk assessment tool for advanced SM.
Conducted in collaboration with University Hospital Mannheim, the analyses validate the MARS-R tool’s ability to assess OS risks in advanced SM patients treated with AYVAKIT or midostaurin, using clinical and genetic parameters. The MARS-R was developed to inform physician care decisions based on individual patient needs.
PRISM Data: Substantial Disease Burden Across Broad Population of Patients with ISM

PRISM is one of the largest studies characterizing the impact of SM from both patient and clinical perspectives.
Across the spectrum of disease severity, patients with ISM experienced physical, social and emotional challenges that caused meaningful disruption to their daily lives.
Patients reported a broad constellation of disease-related impacts, including limitations to physical activities, work/college and relationships; problems with pain/discomfort and anxiety/depression; and adjustments in their daily lives to avoid certain foods, extended sun exposure and smells.
Data Presentations

EHA2025 Congress

Oral Presentation: The Revised Mutation-Adjusted Risk Score (MARS-R) for Predicting Overall Survival in Patients with Advanced Systemic Mastocytosis Treated with Midostaurin or Avapritinib (Abstract S216)
Poster Presentation: Blood-Based Proteomics for Deeper Insights Into Indolent Systemic Mastocytosis: The PIONEER Trial Experience (Abstract PS1838)
Poster Presentation: High Accuracy of Peripheral Blood Testing Using Machine Learning–Derived Predictive Models to Distinguish Advanced from Indolent Systemic Mastocytosis: Analysis of Avapritinib and Elenestinib Trial Data (Abstract PF1310)
Publication-Only Abstract: Phase 2/3 HARBOR Study of Elenestinib in ISM: A Trial-in-Progress Update of Novel Endpoints and Biomarkers Aimed at Evaluating Disease Modification (Abstract PB3108)
EAACI Congress 2025

Flash Talk Presentation: Favorable Benefit-Risk Profile of Avapritinib in Indolent Systemic Mastocytosis Is Maintained After 3 Years of Therapy: Longer-Term Analysis of the PIONEER Study (Abstract 000621)
Flash Talk Presentation: The Socio-Emotional Impact of Indolent Systemic Mastocytosis: Insights from the PRISM Survey (Abstract 000488)
Poster Presentation: The Phase 2/3 Study of Elenestinib, a Highly Potent and Selective Tyrosine Kinase Inhibitor, in Patients with Indolent Systemic Mastocytosis (Abstract 001121)
Data presentations are being made available in the "Science―Publications and Presentations" section of the company’s website at www.blueprintmedicines.com.

On June 12, 2025 UroGen Pharma Ltd. (Nasdaq: URGN), a biotech company dedicated to developing and commercializing innovative solutions that treat urothelial and specialty cancers, reported the U.S. Food and Drug Administration (FDA) approved ZUSDURI, the first and only FDA-approved medication for adults with recurrent LG-IR-NMIBC (Press release, UroGen Pharma, JUN 12, 2025, View Source [SID1234653850]). ZUSDURI consists of mitomycin and sterile hydrogel, using UroGen’s proprietary sustained release RTGel technology. ZUSDURI has been designed for potent tumor ablation. This landmark approval is based on the positive results from the Phase 3 ENVISION trial that demonstrated ZUSDURI delivers 78% complete response (CR) for patients at 3 months, and of those patients 79% remained event-free 12 months later.

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"The approval of ZUSDURI represents a significant step forward for our company and for the treatment of recurrent LG-IR-NMIBC," said Liz Barrett, President and CEO of UroGen. "For the first time, the estimated 59,000 U.S. patients facing recurrent LG-IR-NMIBC each year have access to an FDA-approved medicine. This historic achievement is a bold leap forward in our mission to redefine uro-oncology and bring innovation to patients who need it most. We are deeply grateful to the FDA for their collaboration and to the investigators, patients, and caregivers whose commitment made this milestone possible. Their contributions have been essential in bringing meaningful innovation to the bladder cancer community."

The existing standard of care for LG-IR-NMIBC is a surgical procedure typically performed under general anesthesia called transurethral resection of bladder tumor (TURBT). Due to high recurrence rates of LG-IR-NMIBC, repeat TURBTs may be necessary.

"ZUSDURI marks a breakthrough in uro-oncology, offering a new alternative for recurrent LG-IR-NMIBC patients who can live for many years with the disease but often endure multiple resections, under general anesthesia," said Dr. Sandip Prasad, MD, M.Phil., Director of Genitourinary Surgical Oncology at Morristown Medical Center/Atlantic Health System, NJ, and principal investigator of the ENVISION trial. "For decades, TURBT has been the standard approach for bladder cancer treatment. That’s why innovative treatments like ZUSDURI are essential, especially for those adult patients with recurrent low-grade, intermediate-risk NMIBC."

The most common (≥ 10%) adverse reactions, including laboratory abnormalities, that occurred in patients were increased creatinine, increased potassium, dysuria, decreased hemoglobin, increased aspartate aminotransferase, increased alanine aminotransferase, increased eosinophils, decreased lymphocytes, urinary tract infection, decreased neutrophils, and hematuria. Serious adverse reactions occurred in 12% of patients who received ZUSDURI, including, urinary retention (0.8%) and urethral stenosis (0.4%).

Product Availability

ZUSDURI is expected to be available in the U.S. on or around July 1, 2025, for the treatment of adults with recurrent LG-IR-NMIBC. In the interim, patients can visit ZUSDURI.com (available soon).

UroGen Patient Support

UroGen is committed to helping patients access ZUSDURI. UroGen Support may help identify appropriate financial assistance programs for eligible patients with commercial, Medicare or Medicaid coverage, as well as those with no insurance coverage. These programs are for eligible patients who have been prescribed ZUSDURI and who need help managing the cost of treatment. The appropriate program will depend on the patient’s insurance coverage. Visit ZUSDURI.com (available soon) or contact UroGen Support at 1-833-UROGEN-1 (1-833-876-4361) for additional information.

Post-Marketing Commitment

As a post-marketing commitment, UroGen has agreed with the FDA to complete the ongoing ENVISION trial to further characterize the clinical benefit of ZUSDURI for the treatment of patients with recurrent LG-IR-NMIBC. In addition, UroGen committed to provide the FDA annual updates on duration of response (DOR) for all patients with ongoing complete responses. The annual updates will continue until all ongoing patients experience a recurrence of LG-IR-NMIBC; progression; death; loss to follow-up; or reach 63 months after the first instillation as planned in the protocol, whichever occurs first.

Conference Call & Webcast Information

Members of UroGen’s management team will host a live conference call and webcast on June 13, 2025 at 8:30 AM Eastern Time to review ZUSDURI approval details and commercialization plans. The live webcast can be accessed by visiting the Investors section of the Company’s website at View Source Please connect at least 15 minutes prior to the live webcast to ensure adequate time for any software download that may be needed to access the webcast. An archive of the webcast will be available on the Company’s website.

About ZUSDURI

ZUSDURI (mitomycin) for intravesical solution is an innovative drug formulation of mitomycin, approved for the treatment of adults with recurrent LG-IR-NMIBC. Utilizing UroGen’s proprietary RTGel technology, a sustained release, hydrogel-based formulation, ZUSDURI is delivered directly into the bladder in an out-patient procedure by a trained healthcare professional using a urinary catheter to enable the treatment of tumors by non-surgical means.

About Non-Muscle Invasive Bladder Cancer (NMIBC)

LG-IR-NMIBC affects around 82,000 people in the U.S. every year and of those, an estimated 59,000 are recurrent. Bladder cancer primarily affects older populations with increased risk of comorbidities, with the median age of diagnosis being 73 years. Guideline recommendations for the management of NMIBC include TURBT as the standard of care. Up to 70 percent of NMIBC patients experience at least one recurrence, and LG-IR-NMIBC patients are even more likely to recur and face repeated TURBT procedures. Learn more about non-muscle invasive bladder cancer at www.BladderCancerAnswers.com.

On June 12, 2025 Syndax Pharmaceuticals (Nasdaq: SNDX), a commercial-stage biopharmaceutical company advancing innovative cancer therapies, reported new data from the pivotal AUGMENT-101 trial of Revuforj (revumenib), the Company’s first-in-class menin inhibitor, in patients with relapsed or refractory (R/R) mutant NPM1 (mNPM1) and NUP98-rearranged (NUP98r) acute myeloid leukemia (AML) (Press release, Syndax, JUN 12, 2025, View Source [SID1234653849]). The data are being presented in posters at the 30th European Hematology Association (EHA) (Free EHA Whitepaper) Annual Congress Meeting being held June 12-15, 2025, in Milan, Italy and virtually.

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"The new data from AUGMENT-101 continue to highlight Revuforj’s best-in-class profile and its potential to transform the treatment paradigm for acute leukemia patients with certain genetic alterations," said Nick Botwood, M.B.B.S., Head of Research & Development and Chief Medical Officer at Syndax. "The compelling AUGMENT-101 results led to the FDA approval of Revuforj for R/R acute leukemia with a KMT2A translocation and serve as the foundation for the supplemental NDA we submitted to the FDA for R/R mNPM1 AML, another area of high unmet need."

"Revumenib has shown a potential best-in-class efficacy profile and the latest data in R/R mNPM1 AML underscore the opportunity for revumenib to become a standard of care treatment for this patient population in addition to R/R KMT2Ar acute leukemia," said Ibrahim Aldoss, M.D., Associate Professor, Division of Leukemia, Department of Hematology & Hematopoietic Cell Transplantation at the City of Hope. "The revumenib data in R/R mNPM1 AML presented at EHA (Free EHA Whitepaper) are impressive, with 26% of patients achieving CR/CRh and nearly 50% achieving an overall response with a medicine that was generally well-tolerated. Furthermore, the 23-month median overall survival observed in responders in a subgroup analysis is very encouraging."

Additional Results from R/R mNPM1 AML Patients in the Pivotal Phase 2 Portion of the AUGMENT-101 Trial of Revumenib

The Phase 2 portion of the AUGMENT-101 trial of revumenib enrolled 84 patients with R/R mNPM1 AML. As previously reported, the primary endpoint was met in the protocol-defined primary analysis population which included the first 64 adults who met the efficacy evaluable criteria. At EHA (Free EHA Whitepaper) 2025, the Company will highlight consistent results from all the efficacy-evaluable R/R mNPM1 AML patients (n=77) in the Phase 2 portion of AUGMENT-101 (DCO: September 2024). In this population, the median age was 63 (11-84), 20% had received four or more prior lines of therapy (median prior lines: 2), and 74% had previously received venetoclax.

The complete remission plus complete remission with partial hematologic recovery (CR+CRh) rate was 26% (20/77; 95% CI: 17%-37%). The median duration of CR/CRh response was 4.7 months (95% CI: 2.1-8.2) and the median time to first CR/CRh was 2.8 months (range: 0.9-8.8). Minimal residual disease (MRD) status was assessed in 19 of 20 patients who achieved CR/CRh, 63% (12/19) of whom were MRD negative.

The overall response rate (ORR)1 was 48% (37/77; 95% CI: 37%-60%). Of the patients who achieved an overall response, five patients proceeded to hematopoietic stem cell transplant (HSCT) while in remission, with three patients resuming revumenib after HSCT. Four patients were in CR or CRh and one was in morphologic leukemia-free state (MLFS) when they proceeded to HSCT.

Newly shared data from this single-arm trial show that the median overall survival (OS) observed was 4.8 months (95% CI: 3.4-8.4) among all efficacy-evaluable Phase 2 R/R mNPM1 AML patients, based on the Kaplan-Meier estimate. A new subpopulation analysis that will be reported at a future medical meeting show that a median OS of 23.3 months (95% CI: 8.4-NR) was observed among the 37 patients who achieved an overall response, based on the Kaplan-Meier estimate.

Additionally, newly shared analyses from all efficacy-evaluable Phase 2 R/R mNPM1 AML patients show that CR+CRh responses were observed across subgroups, regardless of co-mutations, number of prior lines of therapy, or prior venetoclax exposure. The CR+CRh rate was 25%, 20%, and 33% among patients with one, two, or three or more prior lines of therapy, respectively. The CR+CRh rate was 45% (95% CI: 23%-69%) among patients without prior venetoclax exposure and 19% (95% CI: 10%-32%) among patients with prior venetoclax exposure.

The AUGMENT-101 Phase 2 safety population included 84 adult and pediatric patients with R/R mNPM1 AML. Detailed results from this safety population were previously published in the journal Blood and will be summarized in the EHA (Free EHA Whitepaper) presentation. The safety profile observed with revumenib in this population was consistent with previously reported data. Revumenib was generally well-tolerated with 4.8% (4/84) of patients discontinuing treatment due to treatment-related adverse events.

Results in R/R NUP98r AML in the Phase 1 Portion of AUGMENT-101 Trial of Revumenib

The Phase 1 portion of the AUGMENT-101 trial of revumenib enrolled R/R acute leukemia patients with KMT2Ar, mNPM1, and other genetic alterations associated with upregulation of HOX, including five patients with NUP98-rearranged (NUP98r) AML. NUP98r is among a growing list of genetic abnormalities associated with upregulation of HOX in leukemia that are susceptible to menin inhibition in preclinical studies.

Among the patients with R/R NUP98r AML, 60% (3/5) attained morphological remission, including one patient who proceeded to transplant, resumed revumenib post-transplant and was in maintenance cycle 10 as of the February 2024 data cutoff date. The safety profile of revumenib in patients with R/R NUP98r AML was consistent with previous reports observed in KMT2Ar or mNPM1 AML.

To further explore the potential for menin inhibition in other genetic populations, a Phase 2 investigator-sponsored study evaluating revumenib in R/R acute leukemia associated with HOX upregulation, including patients with NUP98r AML, has been initiated (NCT06229912). Patients with NUP98r are also included in several other ongoing clinical trials of revumenib, such as the Phase 1 trial of revumenib in combination with intensive chemotherapy in newly diagnosed AML patients and the Phase 1/2 SAVE trial of revumenib in combination with venetoclax and decitabine/cedazuridine in R/R and newly diagnosed patients with AML or mixed-lineage acute leukemia (MPAL). In the SAVE trial, a 100% (5/5) ORR was observed in patients with R/R NUP98r AML (DCO: November 2024).

Additional Revumenib Presentations at EHA (Free EHA Whitepaper) 2025

In addition to newly shared data from patients with R/R mNPM1 AML and NUP98r in the AUGMENT-101 trial, an encore presentation of data from patients with R/R KMT2Ar acute leukemia in the pivotal Phase 2 portion of the trial will also be presented. The data will be featured in a poster session titled "Updated Results and Longer Follow-Up From the AUGMENT-101 Phase 2 Study of Revumenib in All Patients with Relapsed or Refractory (R/R) KMT2Ar Acute Leukemia." Results from the pivotal AUGMENT-101 trial led to the FDA approval in November 2024 of Revuforj (revumenib) for the treatment of R/R acute leukemia with a KMT2A translocation in adult and pediatric patients one year and older.

Two other abstracts were accepted for publication-only. One is a ‘trial in progress’ abstract which describes the design of the ongoing Phase 1 study of revumenib in combination with intensive chemotherapy in newly diagnosed AML patients with KMT2Ar, mNPM1, or NUP98r. The second abstract describes real-world treatment patterns in patients with R/R mNPM1 AML in the U.S. between January 2009 and June 2024.

The posters and publication-only abstracts have been published on the virtual EHA (Free EHA Whitepaper) congress platform. Copies of the posters will be made available in the ‘Publications & Meetings Presentations’ section of the Syndax website.

About Revuforj (revumenib)

Revuforj (revumenib) is an oral, first-in-class, selective menin inhibitor that is FDA approved for the treatment of relapsed or refractory (R/R) acute leukemia with a lysine methyltransferase 2A gene (KMT2A) translocation in adult and pediatric patients one year and older.

Revumenib is in development for the treatment of R/R acute myeloid leukemia (AML) with a nucleophosmin 1 mutation (mNPM1). Positive pivotal data from the AUGMENT-101 trial in this population with revumenib as a monotherapy were recently published and the Company submitted a supplemental NDA for revumenib in R/R mNPM1 AML in April 2025. Additionally, multiple trials of revumenib in combination with standard-of-care agents in mNPM1 AML or KMT2A-rearranged acute leukemia are ongoing or planned across the treatment landscape, including in newly diagnosed patients.

Revumenib was previously granted Orphan Drug Designation for the treatment of AML, ALL and acute leukemias of ambiguous lineage (ALAL) by the U.S. FDA and for the treatment of AML by the European Commission. The U.S. FDA also granted Fast Track designation to revumenib for the treatment of adult and pediatric patients with R/R acute leukemias harboring a KMT2A rearrangement or NPM1 mutation and Breakthrough Therapy Designation for the treatment of adult and pediatric patients with R/R acute leukemia harboring a KMT2A rearrangement.

IMPORTANT SAFETY INFORMATION

WARNING: DIFFERENTIATION SYNDROME

Differentiation syndrome, which can be fatal, has occurred with Revuforj. Signs and symptoms may include fever, dyspnea, hypoxia, pulmonary infiltrates, pleural or pericardial effusions, rapid weight gain or peripheral edema, hypotension, and renal dysfunction. If differentiation syndrome is suspected, immediately initiate corticosteroid therapy and hemodynamic monitoring until symptom resolution.

WARNINGS AND PRECAUTIONS

Differentiation syndrome: Revuforj can cause fatal or life-threatening differentiation syndrome (DS). Symptoms of DS, including those seen in patients treated with Revuforj, include fever, dyspnea, hypoxia, peripheral edema, pleuropericardial effusion, acute renal failure, and/or hypotension. In clinical trials, DS occurred in 39 (29%) of 135 patients treated with Revuforj. DS was Grade 3 or 4 in 13% of patients and fatal in one. The median time to onset was 10 days (range 3-41 days). Some patients experienced more than 1 DS event. Treatment interruption was required for 7% of patients, and treatment was withdrawn for 1%.

Reduce the white blood cell count to less than 25 Gi/L prior to starting Revuforj. If DS is suspected, immediately initiate treatment with systemic corticosteroids (e.g., dexamethasone 10-mg IV every 12 hours in adults or dexamethasone 0.25-mg/kg/dose IV every 12 hours in pediatric patients weighing less than 40 kg) for a minimum of 3 days and until resolution of signs and symptoms. Institute supportive measures and hemodynamic monitoring until improvement. Interrupt Revuforj if severe signs and/or symptoms persist for more than 48 hours after initiation of systemic corticosteroids, or earlier if life-threatening symptoms occur such as pulmonary symptoms requiring ventilator support. Restart steroids promptly if DS recurs after tapering corticosteroids.

QTc interval prolongation: In the clinical trials, QTc interval prolongation was reported as an adverse reaction in 39 (29%) of 135 patients treated with Revuforj. QTc interval prolongation was Grade 3 in 12% of patients. The heart-rate corrected QT interval (using Fridericia’s method) (QTcF) was greater than 500 msec in 8%, and the increase from baseline QTcF was greater than 60 msec in 18%. Revuforj dose reduction was required for 5% of patients due to QTc interval prolongation. QTc prolongation occurred in 16% of the 31 patients less than 17 years old, 33% of the 88 patients 17 years to less than 65 years old, and in 50% of the 16 patients 65 years or older.

Correct electrolyte abnormalities, including hypokalemia and hypomagnesemia, prior to treatment with Revuforj. Perform an electrocardiogram (ECG) prior to initiation of Revuforj, and do not initiate Revuforj in patients with QTcF >450 msec. Perform an ECG at least once weekly for the first 4 weeks and at least monthly thereafter. In patients with congenital long QTc syndrome, congestive heart failure, electrolyte abnormalities, or those who are taking medications known to prolong the QTc interval, more frequent ECG monitoring may be necessary. Concomitant use with drugs known to prolong the QTc interval may increase the risk of QTc interval prolongation.

Interrupt Revuforj if QTcF increases >480 msec and <500 msec, and restart Revuforj at the same dose twice daily after the QTcF interval returns to ≤480 msec
Interrupt Revuforj if QTcF increases >500 msec or by >60 msec from baseline, and restart Revuforj twice daily at the lower-dose level after the QTcF interval returns to ≤480 msec
Permanently discontinue Revuforj in patients with ventricular arrhythmias and in those who develop QTc interval prolongation with signs or symptoms of life-threatening arrhythmia.
Embryo-fetal toxicity: Revuforj can cause fetal harm when administered to a pregnant woman. Advise pregnant women of the potential risk to a fetus. Advise females of reproductive potential and males with female partners of reproductive potential to use effective contraception during treatment with Revuforj and for 4 months after the last dose of Revuforj.

ADVERSE REACTIONS
Fatal adverse reactions occurred in 4 (3%) patients who received Revuforj, including 2 with differentiation syndrome, 1 with hemorrhage, and 1 with sudden death.

Serious adverse reactions were reported in 99 (73%) patients. The most frequent serious adverse reactions (≥5%) were infection (24%), febrile neutropenia (19%), bacterial infection (17%), differentiation syndrome (12%), hemorrhage (9%), and thrombosis (5%).

The most common adverse reactions (≥20%) including laboratory abnormalities, were hemorrhage (53%), nausea (51%), phosphate increased (50%), musculoskeletal pain (42%), infection (41%), aspartate aminotransferase increased (37%), febrile neutropenia (35%), alanine aminotransferase increased (33%), parathyroid hormone intact increased (33%), bacterial infection (31%), diarrhea (30%), differentiation syndrome (29%), electrocardiogram QT prolonged (29%), phosphate decreased (25%), triglycerides increased (25%), potassium decreased (24%), decreased appetite (24%), constipation (23%), edema (23%), viral infection (23%), fatigue (22%), and alkaline phosphatase increased (21%).

DRUG INTERACTIONS
Drug interactions can occur when Revuforj is concomitantly used with:

Strong CYP3A4 inhibitors: reduce Revuforj dose
Strong or moderate CYP3A4 inducers: avoid concomitant use with Revuforj
QTc-prolonging drugs: avoid concomitant use with Revuforj. If concomitant use is unavoidable, obtain ECGs when initiating, during concomitant use, and as clinically indicated. Withhold Revuforj if the QTc interval is >480 msec. Restart Revuforj after the QTc interval returns to ≤480 msec.
SPECIFIC POPULATIONS
Lactation: advise lactating women not to breastfeed during treatment with Revuforj and for 1 week after the last dose.

Pregnancy and testing: Revuforj can cause fetal harm when administered to a pregnant woman. Verify pregnancy status in females of reproductive potential within 7 days prior to initiating Revuforj.

Pediatric: monitor bone growth and development in pediatric patients.

Geriatric: compared to younger patients, the incidences of QTc prolongation and edema were higher in patients 65 years and older.

Infertility: based on findings in animals, Revuforj may impair fertility. The effects on fertility were reversible.

To report SUSPECTED ADVERSE REACTIONS, contact Syndax Pharmaceuticals at 1-888-539-3REV or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

Please see Full Prescribing Information, including BOXED WARNING.