- TYRA-300 is the only orally administered investigational agent in clinical development for IR NMIBC
- Initial 3-month complete response (CR) data expected to be reported in 1H 2026
TYRA-300 is a potential first-in-class, investigational, oral, FGFR3-selective inhibitor designed to minimize the toxicities associated with inhibition of FGFR1, FGFR2 and FGFR4, while being agnostic for FGFR3 gatekeeper mutations. FGFR3 is a frequently altered gene in IR NMIBC, with ~70% of low-grade IR NMIBC showing activating mutations.
"Our goal is to develop TYRA-300 as the first once-daily oral treatment designed to reduce disease recurrence, as well as surgical procedural intervention and intravesical therapy, for people living with IR NMIBC," said Dr. Erik Goluboff, SVP of Clinical Development at TYRA. "We believe we are well-positioned to contribute meaningful advancements to the field of bladder cancer with SURF302, and we anticipate that the clinical data will offer valuable insights with the potential to enhance patient outcomes."SURF302 (NCT06995677) is an open-label Phase 2 clinical study evaluating the efficacy and safety of TYRA-300 in participants with FGFR3-altered low-grade, IR NMIBC. The study will enroll up to 90 participants at multiple sites primarily in the United States. Participants will be randomized initially to treatment with TYRA-300 at 50 mg once daily (QD) (Cohort 1) or treatment with TYRA-300 at 60 mg QD (Cohort 2). Following a review of efficacy and safety, an additional dosing cohort may be evaluated. The primary endpoint is complete response (CR) rate at three months. Secondary endpoints include time to recurrence, the median duration of response, recurrence free survival (RFS), progression free survival (PFS), safety and tolerability.
"I am excited that the Phase 2 trial evaluating oral TYRA-300 in IR NMIBC is now underway," said Dr. Tom Jayram, Director of the Advanced Therapeutics Center at Urology Associates in Nashville, TN. "IR NMIBC is a challenging disease for urologists and patients alike, with the potential for recurrence, progression, and the morbidity of multiple procedures for disease surveillance. Selective FGFR inhibitors are an exciting new option in this disease space that can allow a personalized approach to bladder cancer. TYRA-300 is an investigational, daily oral tablet that has shown encouraging preliminary safety and efficacy in an early phase trial and has the potential to be a paradigm shift in how urologists can treat bladder cancer."
TYRA-300 will also be evaluated in pediatric achondroplasia in the BEACH301 Phase 2 study, which is open for enrollment and for which the Company now expects first child dosing in the second half of the year.
Source: Tyra Biosciences, Inc. (2025). Tyra Biosciences Doses First Patient in Phase 2 Study of TYRA-300 in Low-Grade Intermediate Risk Non-Muscle Invasive Bladder Cancer (SURF302) [Press release]. https://ir.tyra.bio/news-releases/news-release-details/tyra-biosciences-doses-first-patient-phase-2-study-tyra-300-low.