On March 19, 2025 Tvardi Therapeutics, Inc. ("Tvardi"), a clinical-stage biopharmaceutical company developing novel STAT3 inhibitors for fibrosis-driven diseases, reported that results from the first-in-human Phase 1 study of TTI-101 in patients with advanced solid tumors have been published in the journal Clinical Cancer Research (Press release, Tvardi Therapeutics, MAR 19, 2025, View Source [SID1234651262]).
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Imran Alibhai, Ph.D., Chief Executive Officer of Tvardi Therapeutics, stated, "The positive results of this Phase 1 study speak to the potential broad clinical utility of our lead candidate, TTI-101, across a range of fibrosis-driven diseases in which STAT3-mediated proliferation is implicated. Perhaps most notable, in addition to its biological activity in advanced treatment-refractory hepatocellular carcinoma, was a pharmacodynamic reduction of TTI-101’s target, activated STAT3, within paired tumor biopsies. We believe these findings provide very strong rationale for our ongoing Phase 2 studies in IPF and liver cancer."
The publication, titled, "Phase 1 Trial of TTI-101, a First-in-Class Oral Inhibitor of STAT3, in Patients with Advanced Solid Tumors," describes a Phase 1 study in which patients, who received a median of three prior systemic therapies, were treated with TTI-101 monotherapy orally twice daily (NCT03195699). By targeting both intrinsic tumorigenesis and extrinsic immune suppression, TTI-101 showed promising antitumor activity across tumor types, particularly in patients with hepatocellular carcinoma who were refractory to immune checkpoint inhibitors and anti-angiogenic agents.
TTI-101 showed dose-linear pharmacokinetics and, at the recommended Phase 2 dose, the trough exposure levels were above the IC90 for STAT3-induced growth. No dose-limiting toxicities or treatment-related adverse events greater than grade 3 were observed. Pharmacodynamic analysis demonstrated TTI-101 decreased levels of phosphotyrosine (pY) STAT3 within paired tumor biopsies.