Natera, Inc. (NASDAQ:NTRA), a global leader in cell-free DNA (cfDNA) and genetic testing, today announced a new gastroesophageal cancer trial, DECIPHER, that will utilize the company's personalized and tumor-informed molecular residual disease (MRD) test, Signatera, to guide patient selection and assess the rate of MRD clearance in patients being treated for gastroesophageal cancer.

DECIPHER (Developing ctDNA Guided Adjuvant Therapy for Gastroesophageal Cancer) is a single-arm, open-label phase II trial, and the first trial to evaluate the efficacy of a HER2-directed antibody-drug conjugate in gastroesophageal adenocarcinoma (EGC) patients in the adjuvant setting. The study plans to enroll 25 patients from more than 10 sites across the United Kingdom. Patients who are Signatera-positive following neoadjuvant chemotherapy and surgery will forgo standard-of-care adjuvant chemotherapy and receive the investigational therapy for a maximum of eight cycles. Signatera will be used to measure MRD-positivity following surgery and serially thereafter, with MRD clearance serving as the primary endpoint.