On March 12, 2025 Faeth Therapeutics (Faeth), a clinical-stage biotechnology company focused on metabolism, and The GOG Foundation, Inc. (GOG-F), a not-for-profit organization with the purpose of promoting excellence in the quality and integrity of clinical and translational scientific research in the field of gynecologic malignancies, reported the first patient has been dosed in its Phase 2 combination trial of PIKTOR, which is FTH-001 (serabelisib) and FTH-003 (sapanisertib) with paclitaxel (Press release, Faeth Therapeutics, MAR 12, 2025, View Source [SID1234651106]). The trial is the most advanced of its kind to investigate a novel approach of dual PI3Kɑ-mTORC1/2 inhibition targeting cancer metabolism in patients with endometrial cancer.
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The PI3K/AKT/mTOR pathway is the most frequently mutated pathway in cancer and is essential for tumor metabolism. Endometrial cancer has the highest frequency of PI3K pathway mutations of any solid tumor, yet there are no approved therapies addressing this need. FTH-001, a PI3Kɑ inhibitor, and FTH-003, an mTORC 1/2 inhibitor, have both demonstrated potential in multiple previous cancer clinical trials and their combination represents a unique "multi-node" approach to targeting this pathway.
The current study, An Open-label, Multi-Center, Phase 2 Clinical Trial Evaluating Sapanisertib and Serabelisib (PIKTOR) With Paclitaxel, and a Substudy Evaluating PIKTOR With Paclitaxel Plus Diet, in Patients With Advanced or Recurrent Endometrial Cancer (FTH-PIK-201, GOG-3111)2 will expand on the strong Phase 1b data1 showing an 80% ORR in patients with endometrioid endometrial cancer with 11 months of progression-free survival. The Phase 2 study is based on Faeth’s metabolism-focused platform for developing novel therapeutic approaches. Endometrial cancer is one of the leading causes of cancer death in women and there is a high unmet need in patients with advanced and relapsed disease who have progressed after first line carboplatin-based therapy.
"Thanks to Faeth’s ability to uncover novel metabolism-targeting strategies, we are positioned to leverage the PIKTOR approach for endometrial cancer and other solid tumors," said Anand Parikh, J.D., Chief Executive Officer of Faeth Therapeutics. "Over its five decades, the GOG Foundation has established itself as a leading clinical partner against gynecologic cancers, and we are confident they will help us pave the way for the next generation of cancer treatments."
"This unique approach to target cancer metabolism has demonstrated impressive early results. We look forward to this trial to hopefully confirm these early findings and perhaps transform the way we treat patients with endometrial cancer," said David Starks, MD, Principal Investigator and Associate Professor, Avera Cancer Institute and University of South Dakota Sanford School of Medicine.
"Endometrial cancer is the leading cause of deaths among all gynecologic cancers. Finding better treatment options remains our highest priority. We are excited to partner with Faeth Therapeutics to further investigate this novel therapeutic approach," said Brian Slomovitz, MD, Director, Gynecologic Oncology, Mount Sinai Medical Center and Uterine Cancer Trial Lead, GOG Partners.