Erdafitinib

Tyra Biosciences unveiled early trial results on its FGFR3-specific inhibitor in advanced bladder cancer patients on Friday, the public company’s first presentation of human data since its inception in 2018. The biotech’s data were highly anticipated: Its shares $TYRA were up over 100% ahead of the readout, but they fell 18% Friday morning on the update. While the company tested a range of doses in the Phase 1 portion of its SURF301 study in metastatic urothelial carcinoma, its efficacy results focused on the patients who received at least 90 mg, where it believes the drug achieved “adequate target coverage.” Five of the 10 patients who received a 90 mg daily dose of TYRA-300 achieved a partial response, as did one patient who received a 120 mg dose. According to Tyra, three of those six responses are still ongoing. The company said 41 patients with FGFR3+ cancer have enrolled as of Aug. 15, including those who were previously treated with Johnson & Johnson’s Balversa. Tyra’s ultimate goal is to develop a safer treatment than Balversa, which in 2019 became the first FGFR-targeted drug to receive FDA accelerated approval for bladder cancer and earlier this year was granted full approval in advanced FGFR3+ urothelial carcinoma. In its confirmatory trial, Balversa resulted in a response rate of 35% in FGFR3+ advanced bladder cancers. TYRA-300, which goes only after FGFR3 while sparing other isoforms (FGFR1/2/4), aims to evade or lessen certain side effects including eye problems, mouth sores and inflammation, and increased phosphate levels. As we started to see a profile and hear from investigators that this was a really well-tolerated drug, we got really excited that the sparing of FGFR1 and 2 thesis could play out,” CEO Todd Harris said of the safety data in an interview with Endpoints News . The biotech said in a release that SURF301 patients experienced “infrequent FGFR2- and FGFR1-associated toxicities.” TD Cowen analyst Tyler Van Buren wrote in a note Friday that “TYRA-300 boasts a superior tolerability profile compared to pan-FGFR inhibitors,” like Balversa. In 15 patients at the 90 mg dose, the most common adverse events were liver enzyme increases and dry mouth, which 6 trial participants experienced. One grade 3 case of elevated liver enzyme levels resulted in treatment discontinuation and one grade 3 case of diarrhea was reported as a dose-limiting toxicity at 90 mg. “These data give us confidence to advance TYRA-300 through Part B in SURF301 and explore larger opportunities with Phase 2 studies in metastatic urothelial cancer, non-muscle invasive bladder cancer and achondroplasia,” said Tyra CEO Todd Harris in a statement. Harris told Endpoints News that for both non-muscle invasive bladder cancer and achondroplasia, a form of dwarfism, Tyra expects to test lower doses of TYRA-300 than the 90 mg it highlighted in urothelial carcinoma.

– Encouraging preliminary anti-tumor activity observed in heavily pre-treated population – – At ≥ 90 mg QD, 6 out of 11 (54.5%) patients with FGFR3+ mUC achieved a confirmed partial response (PR), with 100% disease control rate and sustained duration of activity – – Positive safety results across all QD doses, with infrequent FGFR2/FGFR1-associated toxicities – – Conference call scheduled for October 25th, 2024, at 8AM EDT – CARLSBAD, CA, USA I October 24, 2024 I Tyra Biosciences, Inc. (Nasdaq: TYRA ), a clinical-stage biotechnology company focused on developing next-generation precision medicines that target large opportunities in Fibroblast Growth Factor Receptor (FGFR) biology, announced today clinical proof-of-concept data for TYRA-300 in patients with metastatic urothelial (mUC) cancer from its ongoing SURF301 Phase 1/2 study.  These data will be presented in a late-breaking oral presentation at the 36 th EORTC-NCI-AACR (ENA) Symposium on Molecular Targets and Cancer Therapeutics, being held October 23-25, 2024 in Barcelona, Spain.  TYRA-300 is a potential first-in-class, investigational, oral, FGFR3-selective inhibitor designed to avoid the toxicities associated with inhibition of FGFR1, FGFR2 and FGFR4, while being agnostic for the FGFR3 gatekeeper mutations. “FGFR3 alterations are known to drive tumor biology in a subset of urothelial cancer.  While pan-FGFR inhibitors have demonstrated benefit and are approved for use in FGFR3 altered urothelial cancer, they are associated with multiple intolerable on-target toxicities that limit their clinical utility.  There remains an unmet need to deliver improved precision medicine for urothelial cancer patients, that allow patients to not only live longer, but live better,” said Ben Tran, M.D., Associate Professor, Peter McCallum Cancer Centre, Melbourne, Australia.  “The initial results from TYRA-300 are very encouraging.  I believe TYRA-300 has the potential to be a next generation targeted therapy, with high selectivity for FGFR3. These early data provide support that TYRA-300 can deliver improved anti-tumor activity and tolerability for our FGFR3 altered urothelial cancer patients.  TYRA-300 has real potential to improve outcomes, and I look forward to its continued development in all FGFR3 altered cancers.” Summary of Interim Clinical Results As of August 15, 2024, the data cutoff date, 41 patients were enrolled in the Phase 1 portion of the SURF301 Phase 1/2 study. Eligible participants were adults with advanced malignancies with or without FGFR3 alterations, including those with prior treatment with erdafitinib.  The enrolled patient population was heavily pre-treated, with 44% of patients receiving ≥ 3 lines of therapy prior to receiving TYRA-300, and 76% of FGFR3+ mUC patients receiving ≥ 3 lines of therapy.  Treatment with TYRA-300 was evaluated across six dose levels, ranging from 10 mg-120 mg once daily (QD). “The preliminary data are what we were expecting to see with TYRA-300, being generally well-tolerated with fewer toxicities, and anti-tumor activity in FGRF3+ mUC patients,” said Doug Warner, M.D., Chief Medical Officer of TYRA.  “The emerging profile of TYRA-300 supports further development in metastatic urothelial cancer, where an attractive opportunity exists for a more tolerable option in second line.” Dr. Warner continued, “We are grateful for the support of our study participants, their families and our global collaborators on SURF301.  We remain focused on progressing TYRA-300 through dose optimization in SURF301 and toward patients in need.” “Our team set out to solve an ambitious chemistry problem that had stumped the field of precision oncology – to create an efficacious FGFR3-selective inhibitor with a favorable tolerability profile to address the limitations of pan-FGFR inhibitors.  We believe that today’s interim results provide clinical support for addressing this difficult problem, and the data are in line with our expectations,” said Todd Harris, CEO of TYRA. “These data give us confidence to advance TYRA-300 through Part B in SURF301 and explore larger opportunities with Phase 2 studies in metastatic urothelial cancer, non-muscle invasive bladder cancer and achondroplasia.” ENA 2024 presentation details: Title: “ Preliminary safety and anti-tumor activity of TYRA-300, a highly selective FGFR3 inhibitor, in participants with advanced solid tumors with activating FGFR3 mutations/fusions (SURF301) “ Session: Late Breaking Abstracts and Proffered Papers: Novel discoveries in drug development Date: Friday, October 25, 2024 Time: 15:36 – 15:48 hrs CEST Abstract #: 500LBA Conference Call Information TYRA is hosting a conference call and webcast on October 25, 2024, at 8am ET to review the interim clinical proof-of-concept results demonstrated with TYRA-300 in mUC.  Participants may access a live webcast of the call and the associated slide presentation on the “For Investors” page of the TYRA website at https://ir.tyra.bio . To participate via telephone, please register in advance at this link . Upon registration, all telephone participants will receive a confirmation email detailing how to join the conference call, including the dial-in number along with a unique passcode and registrant ID that can be used to access the call. A replay of the conference call and webcast will be archived on the Company’s website for at least 30 days. About TYRA-300 and the SURF301 Study TYRA-300 is TYRA’s lead precision medicine program stemming from its in-house SNÅP platform. TYRA-300 is an investigational, oral, FGFR3-selective inhibitor currently in development for the treatment of cancer and skeletal dysplasias, including achondroplasia and hypochondroplasia. In oncology, TYRA-300 is being evaluated in a multi-center, open label Phase 1/2 clinical study, SURF301 ( S tudy in U ntreated and R esistant F GFR3+ Advanced Solid Tumors) (NCT05544552).  The study is designed to determine the optimal and the recommended Phase 2 dose (RP2D) of TYRA-300, as well as to evaluate the preliminary anti-tumor activity of TYRA-300.  Part A of the study included patients with all solid tumors who are FGFR3 +/-, and explored doses of TYRA-300 ranging from 10mg -120mg once-daily (QD).  Part A of SURF301 is complete.  The Company continues to advance TYRA-300 through dose expansion in Part B, which includes patients with solid tumors who are FGFR3 + , to evaluate potentially therapeutic doses in preparation for potential future Phase 2 studies in metastatic urothelial carcinoma (mUC) and non-muscle invasive bladder cancer (NMIBC). In skeletal dysplasias, TYRA-300 has demonstrated positive preclinical results in achondroplasia and hypochondroplasia. In July 2023 and January 2024, the FDA granted Orphan Drug Designation (ODD) and Rare Pediatric Designation (RPD) to TYRA-300, respectively, for the treatment of achondroplasia. About Tyra Biosciences Tyra Biosciences, Inc. (Nasdaq: TYRA ) is a clinical-stage biotechnology company focused on developing next-generation precision medicines that target large opportunities in FGFR biology. The Company’s in-house precision medicine platform, SNÅP, enables rapid and precise drug design through iterative molecular SNÅPshots that help predict genetic alterations most likely to cause acquired resistance to existing therapies. TYRA’s expertise in FGFR biology has created a differentiated pipeline with three clinical-stage programs in targeted oncology and genetically defined conditions.  The Company’s lead precision medicine stemming from SNÅP, TYRA-300, is a potential first-in-class selective FGFR3 inhibitor that is designed to avoid the toxicities associated with inhibition of FGFR1, FGFR2 and FGFR4, while being agnostic for the FGFR3 gatekeeper mutations. TYRA-300 is in development for the treatment of cancer in the SURF301 Phase 1/2 study and for skeletal dysplasias, including achondroplasia and hypochondroplasia.  TYRA is also developing TYRA-200, an investigational, FGFR1/2/3 inhibitor, in the SURF201 study for metastatic intrahepatic cholangiocarcinoma, and TYRA-430, an investigational FGFR4/3-biased inhibitor for FGF19 + /FGFR4-driven cancers.  TYRA is based in Carlsbad, CA. For more information about our science, pipeline and people, please visit www.tyra.bio and engage with us on LinkedIn . SOURCE: Tyra Biosciences