Tyra Biosciences Announces Preclinical Proof-of-Concept Results with TYRA-300 in Hypochondroplasia (HCH)

Core Insights - Tyra Biosciences, Inc. announced preclinical proof-of-concept results for TYRA-300, an investigational oral FGFR3 selective inhibitor, in hypochondroplasia (HCH) at the 6th Annual Achondroplasia & Skeletal Dysplasia Research Conference [1][2] Company Overview - Tyra Biosciences is a clinical-stage biotechnology company focused on developing next-generation precision medicines targeting FGFR biology, utilizing its in-house precision medicine platform, SNÅP, for rapid drug design [4] - The company is based in Carlsbad, California, and aims to address large opportunities in targeted oncology and genetically defined conditions [4] Product Development - TYRA-300 has shown promising preclinical results in increasing long bone length and improving growth plate function in a hypochondroplasia mouse model [6][7] - The drug targets the FGFR3 gene, which is commonly mutated in HCH, with no current approved therapeutic options available [6] - The company plans to submit an Investigational New Drug (IND) application in the second half of 2024 to initiate a Phase 2 clinical study in pediatric achondroplasia [2][7] Clinical Study Insights - In preclinical studies, TYRA-300 demonstrated significant increases in the length of various bones in FGFR3 mutated mice, including femur (3.70%), tibia (3.75%), humerus (3.22%), and ulna (5.03%) [9] - The drug also increased the size of the foramen magnum by 5.88% in the same model [9] - TYRA-300 is currently being evaluated in a multicenter, open-label Phase 1/2 clinical study for advanced solid tumors, aiming to determine the recommended Phase 2 dose and evaluate preliminary antitumor activity [7]