On February 26, 2025 Pyxis Oncology, Inc. (Nasdaq: PYXS), a clinical-stage company developing next-generation therapeutics for difficult-to-treat cancers, reported that the U.S. Food and Drug Administration (FDA) has granted Fast Track Designation to PYX-201 for the treatment of adult patients with recurrent or metastatic head and neck squamous cell carcinoma (R/M HNSCC) whose disease has progressed following treatment with platinum-based chemotherapy and an anti-PD-(L)1 antibody (Press release, Pyxis Oncology, FEB 26, 2025, View Source [SID1234650636]). PYX-201 is a first-in-concept antibody-drug conjugate (ADC) that uniquely targets Extradomain-B Fibronectin (EDB+FN), a non-cellular structural component within the tumor extracellular matrix (ECM), which is highly expressed in various tumor types.
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"Receiving Fast Track designation for PYX-201 from the FDA marks a significant milestone for Pyxis Oncology, recognizing our potential to address the significant medical need in R/M HNSCC. This designation underscores the urgency of bringing differentiated treatment options to patients and will help accelerate the development of PYX-201 as we actively recruit patients for our trial," said Lara S. Sullivan, M.D., President and Chief Executive Officer. "We look forward to working with the FDA to advance this promising therapy as efficiently as possible."
Fast Track designation is an FDA program intended to facilitate and expedite the development and review of new drugs in the U.S. for the treatment of a serious or life-threatening condition. To qualify for this designation, there must be clear data demonstrating the drug has potential to address unmet medical need in the designated condition.
About Head and Neck Squamous Cell Carcinoma (HNSCC)
Head and Neck Cancer (HNC) is the sixth most common cancer in the world, with 1,464,550 new cases and 487,993 deaths from HNC globally1. Squamous Cell Carcinoma presents as the most common subtype and is derived from the mucosal lining of the oral cavity, pharynx and larynx. Almost 50% of cases progress to recurrent or metastatic cancer post-initial treatment, presenting patients with a median overall survival of less than a year. The overall incidence of HNSCC is expected to rise, with a predicted 30% increase annually by 20302. The increase has been associated with multiple factors, including but not limited to tobacco use, alcohol consumption, a rise in HPV infections, and other environmental catalysts. With limited development outside of immunotherapy in the last decade, HNSCC remains one of the most difficult to treat carcinomas, highlighting the unmet need.
About PYX-201
PYX-201, an antibody-drug conjugate (ADC) with a microtubule inhibitor (optimized auristatin) payload that uniquely targets Extradomain-B Fibronectin (EDB+FN), a non-cellular structural component of the tumor extracellular matrix (ECM), is the company’s lead clinical drug candidate.
Two PYX-201 trials are now actively recruiting. One trial, PYX-201-101, is designed to evaluate PYX-201 as monotherapy in patients with R/M HNSCC. A second trial, PYX-201-102, is evaluating PYX-201 in combination with Merck’s anti-PD-1 therapy, KEYTRUDA (pembrolizumab), in patients with R/M HNSCC and other advanced solid tumors. The combination trial is part of a recently announced Clinical Trial Collaboration Agreement with Merck (known as MSD outside of the US and Canada).
KEYTRUDAis a registered trademark of Merck Sharp & Dohme LLC, a subsidiary of Merck & Co., Inc., Rahway, NJ, USA.