NextCure Inc., a clinical-stage biopharmaceutical company, has announced preclinical data demonstrating the effectiveness of NC605, a novel anti-Siglec-15 antibody, in treating osteogenesis imperfecta $(OI)$ in a well-established mouse model. The study results showed that NC605 improved bone microarchitecture and reduced fracture incidence compared to anti-sclerostin treatment. These findings were presented at the Brittle Bone Society Meeting on July 24, 2025. Currently, there is no FDA-approved standard of care for OI, and NC605 could offer significant therapeutic benefits for patients suffering from this rare disorder, characterized by high bone turnover and fragility. NextCure is actively seeking financial partners to advance NC605 towards an Investigational New Drug submission within 12 to 18 months.