Induced Neural Stem Cell Transplantation in Spinal Cord Injury: Present Status and Next Steps

Spinal cord injury (SCI) remains a significant clinical challenge, with no fully effective treatment available despite advancements in various therapeutic approaches. This review examines the emerging role of induced neural stem cells (iNSCs) as promising candidates for SCI treatment, highlighting their potential for direct neural regeneration and integration with host tissue. We explore the biology of iNSCs, their mechanisms of action, and their interactions with host tissue, including modulating inflammatory responses, promoting axonal growth, and reconstructing neural circuits. Additionally, the importance of administration route, optimal timing for transplantation, and potential adverse events are discussed to address key challenges in translating these therapies to clinical applications. The review also emphasizes recent innovations, such as combining iNSC transplantation with rehabilitative training and the integration of biomaterials and growth factors to enhance therapeutic efficacy. Although preclinical studies have demonstrated positive outcomes, larger, controlled trials and standardized protocols are essential for validating the safety and effectiveness of iNSC-based therapies for SCI patients.