On August 1, 2022 ALX Oncology Holdings Inc., ("ALX Oncology") (Nasdaq: ALXO) a clinical-stage immuno-oncology company developing therapies that block the CD47 checkpoint pathway, reported that the U.S. Food and Drug Administration ("FDA") has granted Fast Track designation to evorpacept, a next generation CD47 blocker, in combination with KEYTRUDA (pembrolizumab), Merck’s anti-PD-1 therapy, for the first-line treatment of adult patients with PD-L1 positive advanced head and neck squamous cell carcinoma ("HNSCC") (Press release, ALX Oncology, AUG 1, 2022, View Source [SID1234617202]).
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The FDA’s decision is informed by the results of ALX Oncology’s phase 1 clinical trial, ASPEN-01, that showed preliminary antitumor activity and a favorable safety profile in checkpoint inhibitor-naïve patients with second-line or greater advanced HNSCC treated with evorpacept and pembrolizumab (n=10). The preliminary objective response rate of 40% in this limited population represents an improvement over historical anti-PD-1 monotherapy activity in a similar population and supported the initiation of the ASPEN-03 (NCT04675294) study in May 2021 in collaboration with Merck (known as MSD outside the US and Canada). ASPEN-03 is a randomized phase 2 multi-center study to investigate the anti-tumor efficacy of evorpacept plus pembrolizumab in patients with first-line metastatic or unresectable, recurrent PD-L1 positive HNSCC.
"The FDA’s Fast Track designation for the first-line treatment of HNSCC with evorpacept in combination with pembrolizumab builds upon evorpacept’s prior Fast Track designation in the first-line HNSCC population in combination with pembrolizumab and standard chemotherapy highlighting the potential clinical utility of evorpacept in this difficult-to-treat disease," said Sophia Randolph, M.D., Ph.D., Chief Medical Officer, ALX Oncology. "We are pleased by the patient enrollment progress being made across our HNSCC phase 2 program (NCT04675294; NCT04675333) as we seek to advance evorpacept to help patients living with this disease."
About FDA Fast Track Designation
The FDA’s Fast Track program is designed to facilitate the development and expedite the review of medicines that may treat serious or life-threatening conditions and address significant unmet medical needs. The designation provides the opportunity for more frequent meetings with the FDA over the course of drug development. In addition, the Fast Track program allows for eligibility for Accelerated Approval and Priority Review if relevant criteria are met, as well as for Rolling Review, which enables a drug company to submit portions of the Biologic License Application to the FDA as they are completed.
About HNSCC
HNSCC is a serious and life-threatening disease with poor prognosis despite current available standard of care therapies. According to the Global Cancer Observatory, HNSCC was the 6th most common cancer globally in 2018 and the incidence of HNSCC is expected to increase 30% by 2030. For 2022, the National Cancer Institute estimates about 54,000 new cases of HNSCC will be diagnosed and nearly 11,230 of men and women will die from HNSCC in the United States.