Tonix Pharmaceuticals Announces Oral Presentation and Two Poster Presentations on Preclinical Immuno-oncology Portfolio at the American Association for Cancer Research (AACR) Annual Meeting 2026

On March 17, 2026 Tonix Pharmaceuticals Holding Corp. (Nasdaq: TNXP) ("Tonix" or the "Company"), a fully integrated, commercial biotechnology company, reported an oral presentation and two poster presentations on its preclinical immuno-oncology portfolio at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting 2026, being held April 17–22, 2026, in San Diego, California.

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Oral Presentation Details

Title: TFF2 deficiency amplifies IL-1β-driven inflammation and promotes aging-associated gastric tumor progression
Abstract #: 6822
Date and Time: April 21, 2026, 2:30–4:30 p.m. PT (5:30-7:30 p.m. ET)
Session Category: Tumor Biology
Session Title: Aging Micro- and Macro-Environments in Tumor Progression and Therapy
Presenters: Shuang Li, MD, PhD, and Timothy C. Wang, MD, Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center (Tonix co-authors: Seth Lederman, MD, Chief Executive Officer, and Bruce L. Daugherty, PhD, MBA, Executive Vice President of Research)

Poster Presentation Details

Title: In vitro characterization of fully human antagonistic anti-BTLA monoclonal antibodies
Poster #: 6550
Date and Time: April 21, 2026, 2:00-5:00 p.m. PT (5:00-8:00 p.m. ET)
Session Category: Clinical Research
Session Title: Immune Checkpoint Blockade
Location: Poster Section 44, Board 16
Presenter: Bruce Daugherty, PhD, MBA, Executive Vice President of Research, Tonix

Title: Pharmacokinetics of TNX-1700 in non-human primates and human FcRn/serum albumin transgenic mice
Poster #: 7940
Date and Time: April 22, 2026, 9:00 a.m.–12:00 p.m. PT (12:00-3:00 p.m. ET)
Session Category: Clinical Research
Session Title: Tumor Microenvironment Modulators
Location: Poster Section 49, Board 15
Presenter: Bruce Daugherty, PhD, MBA, Executive Vice President of Research, Tonix

Copies of the Company’s presentations will be available under the Scientific Presentations tab on the Tonix website at www.tonixpharma.com.

About TNX-1700
TNX-1700, a fusion protein of TFF2 and albumin, is in preclinical development for the treatment of gastric and colorectal cancer in combination with PD-1 blockade. TNX-1700, in-licensed from Columbia University, is in the pre-Investigational New Drug (IND) stages of development.

(Press release, TONIX Pharmaceuticals, MAR 17, 2026, View Source [SID1234663664])

Perspective Therapeutics Announces Acceptance of VMT-α-NET Data for Presentation at the AACR Annual Meeting 2026

On March 17, 2026 Perspective Therapeutics, Inc. ("Perspective" or the "Company") (NYSE AMERICAN: CATX), a radiopharmaceutical development company pioneering advanced treatments for cancers throughout the body, reported that updated data on the Company’s [212Pb]VMT-α-NET program have been accepted as a poster presentation at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting 2026 taking place from April 17 to 22, 2026 in San Diego, CA as detailed below. AACR (Free AACR Whitepaper) has announced that it will release further details for clinical trial abstracts for the conference on April 17, 2026.

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Presenter Abstract Title Presentation Details
Thorvardur Halfdanarson, Mayo Clinic Comprehensive Cancer Center [212Pb]VMT-a-NET in advanced SSTR2+ neuroendocrine tumors: safety and preliminary efficacy results from dose-finding cohorts 1, 2 and 3 Abstract Number: CT088
Session Type: Poster presentation
Session Title: Phase I Clinical Trials in Progress
Session Date: April 20, 2026
Session Time: 9:00 am – 12:00 pm
About [212Pb]VMT-α-NET
Perspective designed [212Pb]VMT-α-NET to target and deliver 212Pb to tumor sites expressing somatostatin receptor type 2 (SSTR2). The Company is conducting a multi-center, open-label, dose-escalation, dose-expansion study (clinicaltrials.gov identifier NCT05636618) of [212Pb]VMT-α-NET in patients with unresectable or metastatic SSTR2-positive neuroendocrine tumors who have not received prior radiopharmaceutical therapies (RPT).

Interim analysis with a data cut-off date of December 10, 2025 was previously reported at the 2026 ASCO (Free ASCO Whitepaper) Gastrointestinal Cancers Symposium (ASCO-GI) in January 2026, including efficacy data on half of the patients in Cohort 2 and both patients in Cohort 1. Initial efficacy data for the remaining patients in Cohort 2 and eight patients in Cohort 3 are pending, and submissions for presentations at additional medical conferences during 2026 are planned.

Highlights from the previously presented ASCO (Free ASCO Whitepaper)-GI analysis included the following:

Safety findings based on 56 patients who received at least one treatment:

The 56 patients in this safety analysis comprised 2 patients in Cohort 1 (2.5 mCi), 46 patients in Cohort 2 (5.0 mCi), and 8 patients in Cohort 3 (6.0 mCi).
There were no reports of dose limiting toxicities (DLTs), treatment-related discontinuations, serious renal complications, dysphagia, or clinically significant treatment-related myelosuppression.
Grade 3 or higher treatment-emergent adverse events were reported in 21 patients (37.5%). One of these patients, who was enrolled in Cohort 3, experienced a transient Grade 4 event (lymphocyte count decrease). This event was transient and resolved without medical intervention. The patient continues to receive [212Pb]VMT-α-NET treatment. There were no Grade 5 events.
Serious adverse events were reported in 5 patients, with none deemed related to the study medication.
Anti-tumor activity based on both patients in Cohort 1 and 23 (half) of the patients enrolled in Cohort 2:

Updated efficacy analysis in the same 25 patients from ESMO (Free ESMO Whitepaper) Congress 2025 (ESMO 2025) in October 2025 was presented with an additional ~13 weeks of follow-up since the previous presentation at ESMO (Free ESMO Whitepaper) 2025.
19 of the 25 patients (76%) were without progression and remained alive, including both patients in Cohort 1.
Nine (39%) patients in Cohort 2 were observed to have response according to investigator-assessed RECIST v1.1. Eight (35%) of those responses were confirmed and previously reported at ESMO (Free ESMO Whitepaper) 2025. One additional patient experienced an initial response in their most recent tumor assessment after the prior update at ESMO (Free ESMO Whitepaper) 2025. As the patient remains on study, the patient is expected to receive a subsequent tumor assessment.
Seven patients were observed to have deepening of best response, including one patient with stable disease.

(Press release, Perspective Therapeutics, MAR 17, 2026, View Source [SID1234663663])

Xilio Therapeutics to Present New Preclinical Data for its Masked T Cell Engager Program Targeting CLDN18.2 at the American Association for Cancer Research (AACR) Annual Meeting

On March 17, 2026 Xilio Therapeutics, Inc. (Nasdaq: XLO), a clinical-stage biotechnology company discovering and developing masked immuno-oncology therapies for people living with cancer, reported an upcoming poster presentation at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting, taking place from April 17-22, 2026 at the San Diego Convention Center in San Diego, California.

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Poster presentation details, as follows:

Title: Discovery and Optimization of XTX601, a Masked Claudin 18.2-Targeting T Cell Engager
Session Category: Immunology
Session Title: T Cell Engagers 1
Session Date and Time: Monday, Apr. 20, 2026, from 9:00 a.m. to 12:00 p.m. PST
Location: Poster Section 10
Poster Board: 11
Abstract Number: 1619

(Press release, Xilio Therapeutics, MAR 17, 2026, View Source [SID1234663662])

Boundless Bio Announces Upcoming Presentation of Oral Kinesin Degrader Program at the American Association for Cancer Research Annual Meeting 2026

On March 17, 2026 Boundless Bio (Nasdaq: BOLD), a clinical-stage oncology company interrogating extrachromosomal DNA (ecDNA) biology to deliver transformative therapies to patients with previously intractable oncogene amplified cancers, reported an upcoming poster presentation on their oral Kinesin degrader program at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting 2026, which is being held April 17 – 22, in San Diego, CA.

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Boundless has identified a novel kinesin target ("Kinesin") essential to ecDNA segregation and inheritance in cancer cells, but non-essential in healthy cells. Boundless is developing BBI-940, a potentially first-in-class, oral, selective, Kinesin degrader, which is the subject of the ongoing first-in-human KOMODO-1 (Kinesin Oral Molecular Degrader for Oncology) clinical trial (NCT07408089) in patients with advanced or metastatic estrogen receptor-positive, HER2-negative (ER+/HER2-) breast cancer or triple-negative breast cancer of the luminal androgen receptor subtype (TNBC-LAR).

Details of the presentation are as follows:

Title: Selective degradation of a novel kinesin as a potential therapeutic strategy addressing high-risk extrachromosomal DNA (ecDNA) positive cancers, including breast cancer
Abstract Presentation Number: LB361
Session Title: Late-Breaking Research: Experimental and Molecular Therapeutics 3
Session Date and Time: Tuesday, April 21, 2026, 2:00 PM – 5:00 PM PT
Location: Poster Section 53
Poster Board Number: 18

(Press release, Boundless Bio, MAR 17, 2026, View Source [SID1234663661])

Silexion Therapeutics Reports Fourth Quarter and Full Year 2025 Financial Results and Provides Business Update

On March 17, 2026 Silexion Therapeutics Corp. (NASDAQ: SLXN) ("Silexion" or the "Company"), a clinical-stage, oncology-focused biotechnology company, reported its financial results for the fourth quarter and full year ended December 31, 2025, and provided an update on recent business developments.

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Recent Milestones & Business Highlights

Expanding Preclinical Validation Across KRAS-Driven Cancers: Throughout 2025, Silexion generated additional preclinical data supporting the broad therapeutic potential of SIL204. In human KRAS-mutated cancer cell line models, SIL204 demonstrated very high inhibition levels of cancer cell growth across multiple models and showed activity against eight distinct KRAS mutations: G12D, G12V, G12R, G12C, G13C, G12A, Q61H, and G13D. Preclinical efficacy was observed across four cancer types, including pancreatic, colorectal, lung, and gastric cancers. In orthotopic pancreatic cancer models, systemic administration of SIL204 resulted in significant reductions in primary tumor growth and metastatic spread to secondary organs.

Completion of Toxicology Studies and Clinical Trial Infrastructure Build-Out: In the fourth quarter of 2025, the Company completed two-species GLP toxicology studies for SIL204, supporting planned regulatory submissions and Phase 2/3 clinical readiness. During the year, Silexion also announced it has engaged AMS Advanced Medical Services GmbH as contract research organization (CRO) for its planned Phase 2/3 program and advanced manufacturing and operational partnerships to support scaled clinical execution.

Regulatory Advancement Toward Phase 2/3 Initiation: Silexion received written Scientific Advice from Germany’s Federal Institute for Drugs and Medical Devices (BfArM) regarding the design of its planned Phase 2/3 clinical trial. The Company subsequently submitted its Phase 2/3 clinical trial application to the Ministry of Health in Israel for SIL204 in locally advanced pancreatic cancer and anticipates receiving initial regulatory feedback in the first quarter of 2026. The Company also plans to submit a Phase 2/3 clinical trial application in Germany by the end of the first quarter of 2026, with additional regulatory filings across the European Union planned in early 2027.

Strengthened Financial Position and Nasdaq Compliance: During 2025, the Company raised over $18.6 million in aggregate gross proceeds through public offerings and warrant exercises transactions. In September 2025, Nasdaq confirmed that Silexion had regained full compliance with Listing Rules 5550(a)(2) and 5550(b)(1), securing continued listing on the Nasdaq Capital Market.

Phase 2/3 Clinical Trial Planned for the Second Quarter of 2026: The planned Phase 2/3 clinical study is expected to begin in the second quarter of 2026 and will include an initial safety run-in cohort of approximately 18 patients, followed by expansion into a randomized cohort of approximately 166 patients. The study is designed to evaluate SIL204’s dual-route administration approach in combination with standard chemotherapy in patients with locally advanced pancreatic cancer.

Ilan Hadar, Chairman and Chief Executive Officer of Silexion, commented: "We made meaningful progress during the fourth quarter and throughout 2025 as we executed across scientific, operational, and regulatory priorities to advance SIL204 toward the clinic. With our toxicology package completed, written Scientific Advice from Germany, and the submission of our Phase 2/3 clinical trial application in Israel, we believe we are well-positioned to continue advancing toward our planned Phase 2/3 clinical program initiation in 2026. We remain focused on disciplined execution as we work to bring an RNAi-based approach to patients with KRAS-driven cancers."

Mirit Horenshtein Hadar, Chief Financial Officer of Silexion, added: "During 2025, we strengthened our financial position while maintaining a determined operating approach. We ended the year with approximately $6.0 million in cash and cash equivalents, and we believe our capital structure and focus on clinical progress support our planned development and regulatory and clinical milestones as we advance SIL204."

Financial Results for the Three Months Ended December 31, 2025

Research and development ("R&D") expenses for the three months ended December 31, 2025, were approximately $3.4 million, compared to approximately $0.9 million for the same period in 2024.This quarter-over-quarter increase primarily reflected the Company’s continued progression toward clinical readiness, including increased development and external program execution activities.

General and administrative ("G&A") expenses for the three months ended December 31, 2025, were approximately $1.0 million, compared to approximately $1.0 million for the same period in 2024.

Net loss for the three months ended December 31, 2025, was approximately $4.4 million, compared to approximately $1.7 million in the same period of 2024.
Financial Results for the Year Ended December 31, 2025:

R&D expenses for the year ended December 31, 2025, were $7.1 million, compared to $5.8 million for the year ended December 31, 2024. The increase was primarily driven by higher subcontractor and consultant expenses related to GMP production batches of the active pharmaceutical ingredient (API) and formulation development intended to support initiation of the planned human clinical trial expected in the second quarter of 2026, partially offset by the absence of non-cash share-based compensation expenses recognized in the prior-year period in connection with grants issued during the August 2024 Business Combination.

G&A expenses for the year ended December 31, 2025, were $4.5 million, compared to $6.8 million for the year ended December 31, 2024.The decrease primarily reflecting the absence of significant non-cash share-based compensation expenses and transaction costs recognized in the prior-year period in connection with grants issued during the August 2024 Business Combination, partially offset by higher professional services costs including director compensation, legal and other expenses associated with the transition to a public company subsequent to the Closing of the Business Combination, and more.

Net loss for the year ended December 31, 2025, was $11.9 million, compared to a net loss of $16.5 million for the year ended December 31, 2024.
Balance Sheet Highlights:

As of December 31, 2025, the Company had cash and cash equivalents of $6.0 million, compared to $1.2 million as of December 31, 2024. The Company believes that its current cash balance will support in its continued advancement toward the initiation of Phase 2/3 clinical trial expected in the second quarter of 2026.

Total shareholders’ equity was $2.6 million as of December 31, 2025, compared to a capital deficiency of $(4.0) million as of December 31, 2024. During 2025, the Company completed multiple financing transactions, including approximately $11.0 million in gross proceeds from public offerings in January and September, approximately $2.6 million from warrant exercises, and approximately $5.0 million from warrant exercise inducement transactions (before related issuance costs).

(Press release, Silexion Therapeutics, MAR 17, 2026, View Source [SID1234663660])