Serabelisib

AUSTIN, Texas--(BUSINESS WIRE)--Faeth Therapeutics, a clinical-stage biotechnology company advancing therapies that systematically target tumor metabolism, today announced the advancement of its lead PIKTOR regimen in endometrial cancer and a $25 million strategic raise, bringing total capital raised to $92 million. The financing was led by S2G Investments with participation from existing investors Khosla Ventures, Future Ventures, Digitalis Ventures, KdT Ventures and Cantos, plus new investors B Capital Group, Avicella and THO Seed Fund. Clinical data from sapanisertib in combination with paclitaxel, one component of the PIKTOR regimen, have been selected for a late-breaking oral presentation at the ESMO 2025 Congress. Faeth's phase 1b study of serabelisib + sapanisertib ("PIKTOR") with paclitaxel demonstrated an 80% overall response rate in endometrial cancer patients, with a median progression-free survival of 11 months versus historical 3-4 months with chemotherapy alone. The strength of these results led the Gynecologic Oncology Group (GOG) Foundation, one of the premier U.S. clinical trial networks, to initiate a phase 2 trial (GOG-3111; NCT06463028), now enrolling patients. The study also includes a predefined substudy testing whether protocolized insulin control under trial conditions through precision nutrition enhances clinical outcomes. Endometrial cancer is one of the highest-need solid tumors and illustrates how Faeth’s approach can change outcomes in diseases where PI3K/AKT/mTOR are implicated. This signaling axis is among the most frequently altered across solid tumors, including endometrial, breast, lung, and ovarian. Current single-node inhibitors often fail due to feedback reactivation and mutations elsewhere in the pathway that limit durability. These inhibitors can only target a small fraction of patients with pathway mutations. Faeth's approach is different: it delivers selective multi-node inhibition at PI3Kα, mTORC1, and mTORC2 while controlling the nutrient supply tumors depend on. Multi-node inhibition of the PI3K/AKT/mTOR pathway has already shown clinical benefit in phase 3 studies, confirming the value of pathway-level control in both mutant and wild-type tumors. Faeth’s selective approach builds on this validation while targeting specific nodes to improve the therapeutic window compared to pan-pathway inhibitors, offering less toxic, more convenient treatment options. In preclinical models, this multi-node approach achieved more complete pathway shutdown than single-agent inhibition. "We've achieved the optimal balance in PI3K pathway inhibition, comprehensive enough to prevent resistance, selective enough to avoid immunosuppression," said Anand Parikh, CEO of Faeth Therapeutics. "The 80% response rate, 11-month progression-free survival, initiation of a trial by the GOG Foundation, and recognition as a late-breaking oral presentation at ESMO show that Faeth is executing as a clinical-stage company positioned to expand across the solid tumors where PI3K alterations drive disease." “I believe recent phase 3 studies are showing validation of multi-node targeting,” said S2G Managing Partner Sanjeev Krishnan. “In my view, insider participation in this financing reflects conviction in Faeth’s progress, while new investors recognize metabolism as a category entering the clinic. Based on emerging evidence, Faeth’s selective multi-node approach appears well suited to capture value as metabolism gains recognition as a potential new pillar of cancer treatment." The $25 million will advance the phase 2 endometrial cancer program through a full data readout in Q3 2026 and expand throughput for the company's MetabOS™ platform. The financing also supports a phase 1 study in locally advanced rectal cancer for Faeth’s non-essential amino acid restricted program and initiation of Faeth's first non-oncology program in Hereditary Tyrosinemia Type 1 (HT1), a rare pediatric metabolic disorder, with IND-enabling studies targeting Q4 2026 clinical entry. Beyond blocking growth signals, Faeth's approach recognizes that tumors have significantly elevated metabolic demands and require specific nutrients to survive. The MetabOS platform integrates genomic, gene expression, and tumor microenvironment data to identify metabolic dependencies and exploit them clinically. Funding will expand MetabOS throughput, enabling Faeth to simulate and validate more regimens designed to address metabolic escape. "If the cell is the unit of life, then metabolism is the first verb in its sentence," said Siddhartha Mukherjee, co-founder of Faeth Therapeutics. "Faeth is intervening where cellular decisions are made fastest: at the metabolic switches tumors rely on to adapt, long before mutations accumulate. That is why metabolism is emerging alongside the genome and immunogenicity as a therapeutic discipline." In addition to its oncology programs, Faeth has initiated translational work to treat HT1, an ultra-rare disorder affecting 1 in 100,000 births, where toxic metabolites accumulate due to an enzyme deficiency. While current treatment prevents liver failure, patients still face unmet medical needs. The company is applying MetabOS to develop metabolic therapeutic approaches for this condition. This program is the first demonstration of MetabOS applied outside of oncology and establishes the platform’s ability to identify and address metabolic dependencies across diseases. About Faeth Therapeutics Faeth Therapeutics is a clinical-stage biotechnology company developing multi-node therapies that block cancer growth signals while controlling tumor fuel supply, leveraging its AI-driven MetabOS™ platform to identify and exploit metabolic dependencies. In addition to advancing multiple solid-tumor studies, Faeth is advancing a translational program in Hereditary Tyrosinemia Type 1 (HT1), the first example of how its approach can extend beyond oncology into rare diseases. Founded in 2019 by leading researchers including Lewis Cantley, PhD, Siddhartha Mukherjee, MD, DPhil, Karen Vousden, PhD, Scott Lowe, PhD, and Greg Hannon, PhD, the company has raised $92 million from S2G Investments, Khosla Ventures, Future Ventures, Digitalis Ventures, KdT Ventures, Cantos, Avicella, THO Seed Fund, and B Capital Group. For more information, visit faeththerapeutics.com.

BARCELONA, Spain--(BUSINESS WIRE)--Faeth Therapeutics today announced results from the international DICE trial, a randomized phase 2 study of sapanisertib (TAK228) plus weekly paclitaxel versus paclitaxel alone in women with platinum-resistant or recurrent epithelial ovarian or fallopian tube cancer. The trial was selected for a Late-Breaking Oral Presentation at the European Society for Medical Oncology (ESMO) Congress 2025 and met its pre-ordained statistical design and there is sufficient evidence of a positive signal to justify a larger phase 3 design. 134 patients were enrolled across sites in the UK and Germany. Median age was 62 years and nearly half had received three or more prior therapies. The combination achieved mean progression-free survival (PFS) of 5.8 months compared to 4.0 months with paclitaxel alone, extending time to disease progress by approximately 45 percent. The addition of sapanisertib was associated with a 34% reduction in risk of progression compared to paclitaxel alone (HR=0.66; 90% CI: 0.45–0.96; p=0.07), meeting the trial's prespecified hazard ratio target of 0.66. Grade 3/4 adverse events occurred in 7% of patients receiving the combination versus 6.6% for paclitaxel alone. Gastrointestinal toxicities (11.4% vs. 0%) and rash (2.9% vs. 0%) were more common with the combination but were manageable. "Platinum-resistant ovarian cancer remains one of the toughest conditions we face, with women often cycling through treatments that only briefly hold the disease at bay temporarily," said Jonathan Krell, MD, Ovarian Cancer Action Research Centre, Imperial College London, the study's lead investigator. "The DICE trial shows that adding an oral targeted agent to weekly paclitaxel can slow progression without added high-grade toxicity, a finding that clearly warrants a phase 3 trial." "These results reinforce our belief that targeting the metabolism of cancer cells can improve the impact of existing therapies," said Anand Parikh, JD, CEO and co-founder of Faeth Therapeutics. "On the strength of DICE, we see sapanisertib plus paclitaxel as phase 3-ready in ovarian cancer, alongside our ongoing phase 2 in endometrial cancer and planned phase 1b/2 in breast cancer." Response rate and overall survival analyses are ongoing. The trial is also evaluating biomarkers, including PTEN expression, metabolic signatures, and genomic correlates, to identify patients most likely to benefit from the combination. About the DICE Trial DICE (NCT03648489) is a multi-centre randomized phase 2 study comparing weekly paclitaxel alone versus paclitaxel plus sapanisertib in women with platinum-resistant or recurrent ovarian or fallopian tube cancer. The primary endpoint is progression-free survival; secondary endpoints include response rate and overall survival. Translational endpoints include PTEN correlation and exploratory biomarker analyses. About Faeth Therapeutics Faeth Therapeutics is a clinical-stage biotechnology company integrating targeted therapies with precision nutrition interventions to exploit metabolic vulnerabilities in cancer. Founded by renowned researchers from Cornell, Columbia, Cambridge, Memorial Sloan Kettering, and the Crick Institute—including Drs. Lewis Cantley, Siddhartha Mukherjee, Karen Vousden, Greg Hannon, and Scott Lowe—Faeth leverages its AI-driven MetabOS™ discovery platform to identify metabolic targets. Its lead clinical program, combining serabelisib and sapanisertib, is a multi-node approach to more completely inhibit the PI3K/AKT/mTOR pathway, demonstrating promising outcomes in cancers strongly associated with obesity and metabolic disorders. For more information, visit www.faeththerapeutics.com. About Imperial College London We are Imperial – a world-leading university for science, technology, engineering, medicine and business (STEMB), where scientific imagination leads to world-changing impact. As a global top ten university in London, we use science to try to understand more of the universe and improve the lives of more people in it. Across our 10 campuses and throughout our Imperial Global network, our 22,000 students, 8,000 staff, and partners work together on scientific discovery, innovation and entrepreneurship. Their work navigates some of the world’s toughest challenges in global health, climate change, AI, business leadership and more. Founded in 1907, Imperial’s future builds on a distinguished past, having pioneered penicillin, holography and fibre optics. Today, Imperial combines exceptional teaching, world-class facilities and a habit of interdisciplinary practice to unlock scientific imagination.