Adcentrx Therapeutics announced that the FDA has granted orphan drug designation to ADRX-0405 for the treatment of patients with gastric cancer.
ADRX-0405 is a STEAP1 ADC being evaluated in the Phase 1a portion of an ongoing Phase 1a/b clinical trial (NCT06710379) for the treatment of select advanced solid tumors, including metastatic castration resistant prostate cancer, gastric cancer, and non-small cell lung cancer. While STEAP1 is primarily associated with prostate cancer, there is a meaningful amount of target expression in gastric cancer, making this a potential indication of interest for future clinical development.
"Receiving orphan drug designation from FDA is a notable milestone for Adcentrx and reinforces the potential for ADRX-0405 to improve the lives of patients with gastric cancer," said Hui Li, Ph.D., Founder and Chief Executive Officer of Adcentrx. "We are encouraged by the progress of our Phase 1a trial and look forward to further evaluating the safety, tolerability and anti-tumor activity of ADRX-0405 in gastric and other cancers."
Gastric cancer, or stomach cancer, is a serious malignancy that develops in the stomach lining and is often diagnosed at advanced stages. The American Cancer Society estimates there will be 30,300 new cases of gastric cancer in the U.S. in 2025, meeting FDA's criteria for a rare disease. The orphan drug designation is a program designed to stimulate the development of treatments for rare diseases, defined as conditions affecting fewer than 200,000 people in the U.S. Benefits of this designation include access to grant funding and scientific assistance, tax credits for qualified clinical trials, waiver of Prescription Drug User Fee Act (PDUFA) application fees, and the potential for seven years of market exclusivity following regulatory approval.
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