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ImmunityBio to Showcase Advances for Bladder and Prostate Cancer at American Urological Association (AUA) Annual Meeting

On April 21, 2025 ImmunityBio, Inc. (NASDAQ: IBRX), a leading immunotherapy company, reported new clinical findings for ANKTIVA (nogapendekin alfa inbakicept-pmln) in non-muscle invasive bladder cancer carcinoma in situ (NMIBC CIS) and updated data on papillary disease without CIS at the American Urological Association Annual Meeting (AUA 2025) in Las Vegas, April 26-29 (Press release, ImmunityBio, APR 21, 2025, View Source [SID1234651990]). The company will also host an educational and peer-networking event to discuss ImmunityBio’s approach to treatment of NMIBC CIS and papillary disease and how they have impacted patients.

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"ImmunityBio has made remarkable strides in 2025, marked by groundbreaking long-term efficacy data for ANKTIVA and the launch of our Expanded Access Program to help end the BCG shortage," said Dr. Patrick Soon-Shiong, Founder, Executive Chairman, Global Chief Scientific & Medical Officer of ImmunityBio. "With these critical advancements, we are eager to connect, collaborate, and drive meaningful discussions with the urology community at AUA 2025, shaping the future of bladder and prostate cancer care together. In addition, ImmunityBio has applied for Expanded Access for the use of ANKTIVA as a ‘BioShield’ in patients receiving chemotherapy, radiation, and immunotherapy to enable access to ANKTIVA across the country for patients in need."

Oral Presentations by Key Opinion Leaders:

Presented research will continue to demonstrate long-term duration of response with ANKTIVA + BCG in an updated analysis of the pivotal QUILT 3.032 trial in CIS and papillary BCG-Unresponsive NMIBC.

An Update on QUILT 3.032: Complete Responses to N-803 plus BCG Therapy in BCG-Unresponsive Bladder Carcinoma in Situ (CIS) With or Without Ta/T1 Papillary Disease (PD12-12)
Chang S. Oral Podium Presentation. Session: Bladder Cancer: Non-Invasive II, Saturday, April 26, 3:30 pm – 5:30 pm PDT, Galileo 1001, The Venetian Convention & Expo Center
Keynote Events by Dr. Soon-Shiong at AUA

Patrick Soon-Shiong, M.D., will participate in a series of presentations showcasing the power and potential of immunotherapy in shaping the future of urological cancers.

Embracing the Future: The Power of Innovation in a Changing World
Dr. Patrick Soon-Shiong, Keynote. AUA Innovation Nexus Conference, Friday, April 25, 1:00-1:45 pm PDT, The Venetian Convention & Expo Center
The Science of the Triangle Offense: NMIBC Patient and Prostate Cancer Experience
Educational and peer-networking event with Drs. Patrick Soon-Shiong, ImmunityBio Chief Medical Officer Sandeep "Bobby" Reddy, and Senior Vice President of Medical Affairs Bruce Brown, Saturday, April 26, 6:30 pm – 9:00 pm PDT, The Venetian Convention & Expo Center
The Missing Link: Overcoming Lymphopenia through NK & Memory T Cells to Achieve Durable Responses in Urological Diseases – ALC Matters, Duration Matters, the Immune System Matters
Dr. Patrick Soon-Shiong, ImmunityBio Product Theater, Sunday, April 27, 1:30 pm – 2:30 pm PDT, Science & Technology Hall, The Venetian Convention & Expo Center
About ANKTIVA

The cytokine interleukin-15 (IL-15) plays a crucial role in the immune system by affecting the development, maintenance, and function of key immune cells—NK and CD8+ killer T cells—that are involved in killing cancer cells. By activating NK cells, ANKTIVA overcomes the tumor escape phase of clones resistant to T cells and restores memory T cell activity with resultant prolonged duration of complete response.

ANKTIVA is a first-in-class IL-15 agonist IgG1 fusion complex, consisting of an IL-15 mutant (IL-15N72D) fused with an IL-15 receptor alpha, which binds with high affinity to IL-15 receptors on NK, CD4+, and CD8+ T cells. This fusion complex of ANKTIVA mimics the natural biological properties of the membrane-bound IL-15 receptor alpha, delivering IL-15 by dendritic cells and drives the activation and proliferation of NK cells with the generation of memory killer T cells that have retained immune memory against these tumor clones. The proliferation of the trifecta of these immune killing cells and the activation of trained immune memory results in immunogenic cell death, inducing a state of equilibrium with durable complete responses. ANKTIVA has improved pharmacokinetic properties, longer persistence in lymphoid tissues, and enhanced anti-tumor activity compared to native, non-complexed IL-15 in-vivo.

ANKTIVA was approved by the FDA in 2024 for BCG-unresponsive non-muscle invasive bladder cancer CIS with or without papillary tumors. For more information, visit ImmunityBio.com (Founder’s Vision) and Anktiva.com.

Axcynsis Therapeutics to Present Two Posters on Anti-CLDN6 and Anti-ALPP/ALPPL2 Antibody Therapeutics at American Association for Cancer Research (AACR) Annual Meeting 2025

On April 21, 2025 Axcynsis Therapeutics that is at the forefront of developing cutting-edge Antibody Drug Conjugate (ADC) therapies, reported two upcoming poster presentations at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting 2025 (Press release, Axcynsis Therapeutics, APR 21, 2025, View Source [SID1234651989]). This meeting will be held in Chicago from April 25th to 30th 2025.

The company will present the following two assets:

AT65474 is a highly selective anti-CLDN6 ADC with a proprietary payload
Session Category: Experimental and Molecular Therapeutics

Session Title: Antibody-Based Cancer Therapeutics 4

Session Date and Time: April 30, 2025, 9:00 AM to 12:00 PM (Local Time)

Location: Poster Section 16

Poster Board Number: 7

Published Abstract Number: 6741

CLDN6 is a membrane-bound oncofetal protein and a promising target for cancers such as ovarian and testicular cancer. AT65474 is an antibody drug conjugate (ADC) candidate composed of a highly selective humanized anti-CLDN6 antibody conjugated to a proprietary payload, namely TCS132, with a drug-to-antibody (DAR) ratio of 4. The antibody is engineered to incorporate AxcynCYSTM technology for site-specific conjugation which can reproducibly achieve high DAR4 ratios of greater than 97% by HIC analysis.

The payload, TCS132, is derived from an FDA approved drug and when compared to the parent drug, demonstrates increased potency with broad sub-nanomolar activities across a wide range of cancer cell lines including those resistant to paclitaxel, DM1, MMAE and DXd. Additionally, TCS132 was chemically optimized for better PK properties and demonstrates a much-improved safety profile despite its increased potency over the parent drug.

AT2604 is a highly efficacious ADC targeting alkaline phosphatases ALPP and ALPPL2
Session Category: Experimental and Molecular Therapeutics

Session Title: Antibody-Based Cancer Therapeutics 4

Session Date and Time: April 30, 2025, 9:00 AM to 12:00 PM (Local Time)

Location: Poster Section 16

Poster Board Number: 17

Published Abstract Number: 6751

Placental alkaline phosphatases, ALPP and ALPPL2, are highly homologous, membrane-bound proteins involved in fetal development. Despite having limited expression in normal tissues, they are highly differentiated in multiple tumor cells making them ideal targets for antibody drug conjugate (ADC) development.

AT2604 is an ADC incorporating an anti-ALPP/ALPPL2 antibody conjugated to monomethyl auristatin E (MMAE) with high DAR 4 homogeneity; and displays strong tumor growth inhibition at low doses in CDX models of gastric and pancreatic cancer. In patient-derived xenograft models of gastric cancer with moderate- and low-antigen expression, AT2604 achieves near-complete tumor regression at 3 and 6 mg/kg (QWx3), respectively. A preliminary toxicity assessment in non-human primates concluded a well-tolerated dose of 10 mg/kg (Q3Wx3) without exhibiting any non-reversible adverse effects and good plasma stability; implying that AT2604 possesses an improved safety profile over other vedotin-based ADCs.

Arvinas to Present Preclinical Data for PROTAC BCL6 Degrader, ARV-393, at 2025 American Association for Cancer Research® (AACR) Annual Meeting

On April 21, 2025 Arvinas, Inc. (Nasdaq: ARVN), a clinical-stage biotechnology company working to develop a new class of drugs based on targeted protein degradation, reported that new preclinical combination data for ARV-393 will be presented at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual meeting, April 25-30, 2025 in Chicago, Illinois (Press release, Arvinas, APR 21, 2025, View Source [SID1234651988]). The poster highlights the potential for ARV-393 to be combined with various standard of care lymphoma treatments.

ARV-393 is Arvinas’ investigational PROteolysis TArgeting Chimera (PROTAC) degrader targeting the B-cell lymphoma 6 protein (BCL6), a transcriptional repressor and major driver of B-cell lymphomas.

Presentation details are as follows:

Poster Title: ARV-393, a PROteolysis TArgeting Chimera (PROTAC) BCL6 Degrader, Combined With Biologics or Small-Molecule Inhibitors Induces Tumor Regressions in Diffuse Large B-Cell Lymphoma Models

Abstract: 1655
Session Title: Degraders and Glues 2
Session Type: Experimental and Molecular Therapeutic
Location: Poster Section 18
Poster Board Number: 15
Date: Monday, April 28, 2025
Lecture Time: 9:00 a.m. – 12:00 p.m. CT

The full abstract can be accessed via the AACR (Free AACR Whitepaper) 2025 online interactive program.

About ARV-393
ARV-393 is an investigational PROteolysis TArgeting Chimera (PROTAC) designed to degrade B-cell lymphoma 6 protein (BCL6), a transcriptional repressor and major driver of B-cell lymphomas. The BCL6 protein facilitates B cell tolerance of rapid proliferation and somatic gene recombination via repressing cell cycle checkpoints, terminal differentiation, apoptosis, and the DNA damage response. PROTAC-mediated degradation has the potential to address the traditional undruggable nature of BCL6. ARV-393 is currently in a Phase 1 clinical trial in patients with relapsed/refractory non-Hodgkin lymphoma.

YB-800 ADCs Reach Important Milestone: Proof of Concept in Preclinical in Vitro and in Vivo Tests

On April 18, 2025 Ymmunobio AG (YB), a Swiss-based global biotech company dedicated to the development of new cancer therapeutics, reported that its two-antibody drug conjugate (ADC) assets, YB-800ADC1 and YB-800ADC2, have completed the preclinical proof of concept studies (Press release, Ymmunobio, APR 18, 2025, View Source [SID1234651987]). Both in vivo and in vitro studies have reached this important milestone by demonstrating the anti-tumor efficacy of both ADCs.

The ADCs are derived from YB’s lead antibody YB-800 which targets a novel and first in class tumor marker. They utilize established payloads and a third-generation linker, demonstrating a tumor growth inhibition of 90%.

"These excellent results allow YB to move forward swiftly to prepare for the pivotal toxicology studies. This is a major step towards the clinical development of our ADCs in solid tumors and demonstrates the potential for YB’s ADCs to address unmet needs for cancer patients expressing the new novel tumor marker. In addition, the proof-of-concept data support the preclinical development of the two YB-800 based radiopharmaceuticals developed in collaboration with the Paul Scherer Institute," said Peter Schiemann, CEO.

SparX to Present Phase 1 Clinical Updates of SPX-303, a Dual Checkpoint Bispecific Antibody, at Two Events During AACR 2025

On April 18, 2025 SparX Biopharmaceutical Corp. reported that it will present clinical updates on its lead asset, SPX-303, a first-in-class anti-LILRB2/PD-L1 bispecific antibody, during the Trial-in-Progress poster session at the 2025 American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting on April 28, from 2:00 PM to 5:00 PM (Press release, Sparx Therapeutics, APR 18, 2025, View Source [SID1234651986]). The presentation marks the one-year anniversary of the first patient dosing of this novel bispecific antibody in its ongoing Phase 1 clinical trial.

A more comprehensive overview of SPX-303’s dual mechanism, which targets both myeloid and T-cell immune checkpoints, will be featured at a Satellite Symposium themed "Harnessing Super Immunotherapy and ADCs to Redefine the Standard of Care." Co-hosted by the University of Illinois at Chicago Cancer Center and Yao Yuan—Academy for Pharma Innovation, the symposium will convene expert clinicians, academic investigators, and industry leaders to discuss how next-generation immuno-oncology, known as "Super IO," can be synergized with antibody-drug conjugates (ADCs). This innovative approach combines the tumor-targeting precision of ADCs with the immune-activating power of checkpoint inhibitors, aiming to deliver deeper and more durable anti-tumor responses.

SPX-303, a first-in-class bispecific antibody targeting LILRB2 and PD-L1, is currently enrolling patients with resistant or refractory solid tumors at a dose level of 20 mg/kg. "This innovative program represents a significant advancement in macrophage checkpoint blockade and T cell co-engagement strategies," said Dr. Gui-Dong Zhu, CEO of SparX. "It holds promise as a potential next-generation immuno-oncology therapy—or ‘Super IO’ booster—for patients with limited treatment options."

The SPX-303 poster will be presented at Poster #CT116-11 in the Phase I Clinical Trials in Progress session at McCormick Place, Chicago, on April 28, from 2:00 to 5:00 PM. The Satellite Symposium will be held at the Trump International Hotel & Tower Chicago (401 N Wabash Ave, Chicago, IL 60611). SparX welcomes attendees to visit its exhibition booth during the symposium and strongly encourages early registration via the [registration portal] to secure a seat.

About SPX-303

SPX-303 is a first-in-its-class bispecific antibody therapy designed to simultaneously inhibit LILRB2 and PD-L1, two critical immune checkpoint proteins often hijacked by cancer cells. The program represents a novel immunotherapy approach aimed at activating both myeloid and lymphoid immune responses.