Ayala Pharmaceuticals, Inc. announced the completion of its end-of-Phase 1 meeting with the U.S. Food and Drug Administration (FDA) on AL102, a potent, selective, oral gamma secretase inhibitor (GSI), for the treatment of desmoid tumors. The FDA has agreed, based on data from AL101 and AL102 studies including durable responses observed in patients with Desmoid tumors, to proceed with a Phase 2/3 pivotal study, which can potentially be used as a registrational study. Ayala expects to initiate the pivotal Phase 2/3 RINGSIDE study in adult and adolescent patients with desmoid tumors in the first half of 2021. The pivotal Phase 2/3 RINGSIDE trial is designed to evaluate the efficacy, safety and tolerability of AL102 in adult and adolescent patients with desmoid tumors. Part 1 of the study will be open label and will enroll up to 36 patients with progressive desmoid tumors in three study arms across three doses of AL102: 1.2 mg daily (QD), 2 mg twice weekly (QIW), and 4mg twice weekly (QIW) with initial follow up of safety, tolerability and tumor volume by MRI after 16 weeks in order to determine the optimal dose. At the end of part 1, all patients will be eligible to enroll into an open label extension study at the selected dose where long-term efficacy and safety will be monitored. Part 2 of the study will start immediately after dose selection from part 1 and will be a double-blind placebo-controlled study enrolling up to 156 patients with progressive disease, randomized 2:1 between AL102 or placebo. The study’s primary endpoint will be progression free survival (PFS) with secondary endpoints including, objective response rate (ORR), duration of response (DOR) and patient reported Quality of Life (QOL) measures. The study is expected to commence in the first half of 2021 with an initial interim data read-out from part 1 and dose selection expected by mid-2022 with part 2 of the study to commence immediately thereafter.