OS Therapies to Provide OST-HER2 Recurrent, Fully Resected, Pulmonary Metastatic Osteosarcoma FDA End of Phase 2 Meeting Update on Tuesday, September 2, 2025
Rhea-AI Summary
OS Therapies (NYSE American: OSTX), a clinical-stage biotechnology company focused on cancer immunotherapy and antibody drug conjugates, has announced plans to provide a comprehensive update following their End of Phase 2 Meeting with the FDA regarding OST-HER2. The update, scheduled for September 2, 2025, will detail the regulatory pathway for potential approval of OST-HER2 in treating recurrent, fully resected, pulmonary metastatic osteosarcoma.
The company described their August 27 meeting with the FDA as "highly constructive," suggesting positive developments in their clinical program for this rare cancer treatment.
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New York, New York--(Newsfile Corp. - August 27, 2025) - OS Therapies Inc. (NYSE American: OSTX) ("OS Therapies" or "the Company"), a clinical-stage cancer immunotherapy and antibody drug conjugate biotechnology company, today announced that it will provide stakeholders with a detailed update regarding the Company’s highly constructive August 27, 2025 End of Phase 2 Meeting with the US Food & Drug Administration ("FDA") discussing the regulatory path forward towards approval for OST-HER2 in recurrent, fully resected, pulmonary metastatic osteosarcoma on Tuesday, September 2, 2025.
About OS Therapies
OS Therapies is a clinical stage oncology company focused on the identification, development, and commercialization of treatments for Osteosarcoma (OS) and other solid tumors. OST-HER2, the Company's lead asset, is an immunotherapy leveraging the immune-stimulatory effects of Listeria bacteria to initiate a strong immune response targeting the HER2 protein. OST-HER2 has received Rare Pediatric Disease Designation (RPDD) from the U.S. Food & Drug Administration and Fast-Track and Orphan Drug designations from the U.S. FDA and European Medicines Agency. The Company reported positive data in its Phase 2b clinical trial of OST-HER2 in recurrent, fully resected, lung metastatic osteosarcoma, demonstrating statistically significant benefit in the 12-month event free survival (EFS) primary endpoint of the study. The Company anticipates submitting a Biologics Licensing Application (BLA) to the U.S. FDA for OST-HER2 in osteosarcoma in 2025 and, if approved, would become eligible to receive a Priority Review Voucher that it could then sell. OST-HER2 has completed a Phase 1 clinical study primarily in breast cancer patients, in addition to showing preclinical efficacy data in various models of breast cancer. OST-HER2 has been conditionally approved by the U.S. Department of Agriculture for the treatment of canines with osteosarcoma.
In addition, OS Therapies is advancing its next-generation Antibody Drug Conjugate (ADC) and Drug Conjugates (DC), known as tunable ADC (tADC), which features tunable, tailored antibody-linker-payload candidates. This platform leverages the Company's proprietary silicone Si-Linker and Conditionally Active Payload (CAP) technology, enabling the delivery of multiple payloads per linker. For more information, please visit www.ostherapies.com.
Forward-Looking Statements
Statements in this press release about future expectations, plans and prospects, as well as any other statements regarding matters that are not historical facts, may constitute forward-looking statements within the meaning of the federal securities laws. These forward-looking statements and terms such as "anticipate," "expect," "intend," "may," "will," "should" or other comparable terms involve risks and uncertainties because they relate to events and depend on circumstances that will occur in the future. Those statements include statements regarding the intent, belief or current expectations of OS Therapies and members of its management, as well as the assumptions on which such statements are based. OS Therapies cautions readers that forward-looking statements are based on management's expectations and assumptions as of the date of this press release and are subject to certain risks and uncertainties that could cause actual results to differ materially, including, but not limited to the approval of OST-HER2 by the U.S. FDA and other risks and uncertainties described in "Risk Factors" in the Company's most recent Annual Report on Form 10-K, most recent Quarterly Report on Form 10-Q and other subsequent documents the Company files with the Securities and Exchange Commission. Any forward-looking statements contained in this press release speak only as of the date hereof, and, except as required by the federal securities laws, OS Therapies specifically disclaims any obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise.
OS Therapies Contact Information:
Investor Relations
Harrison Seidner, PhD
WaterSeid Partners
OSTX@waterseid.com
Public Relations
Stephanie Chen
Elev8 New Media
stephanie@elev8newmedia.com
https://x.com/OSTherapies
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https://www.linkedin.com/company/os-therapies/
To view the source version of this press release, please visit https://www.newsfilecorp.com/release/264171
FAQ
When will OS Therapies (OSTX) provide the FDA End of Phase 2 Meeting update for OST-HER2?
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What type of treatment is OST-HER2 being developed for by OS Therapies (OSTX)?
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