Safety and Outcomes of MUSE Stem Cell Therapy in Individuals With Traumatic Brain Injury

This observational study is designed to systematically evaluate the safety, tolerability, and potential neurological outcomes associated with MUSE (Multilineage-differentiating Stress-Enduring) stem cell therapy in individuals with chronic traumatic brain injury (TBI) who independently obtain treatment through international clinical programs. MUSE cells are a distinct subpopulation of mesenchymal stem cells characterized by stress resilience, spontaneous triploblastic differentiation, and the capacity to home to sites of tissue injury. Preclinical research suggests that MUSE cells may contribute to neuroregeneration through differentiation into neural and glial lineages, modulation of inflammatory pathways, and repair of damaged central nervous system structures. While early findings are promising, clinical evidence remains limited, highlighting the need for structured real-world data. This study does not randomize participants or administer any treatment. Instead, it functions as a registry-style, real-world evidence platform following individuals who have elected to receive MUSE cell therapy at licensed facilities outside the United States. Collected data will include baseline demographics, TBI history, details of the stem cell procedure (such as cell source, administered dose, and route of delivery), and longitudinal follow-up over 12 months. Primary domains of interest include: Neurological function, assessed with validated clinical instruments (e.g., Glasgow Outcome Scale-Extended). Quality of life, measured using standardized patient-reported outcome tools (e.g., PROMIS-29, EQ-5D). Functional abilities and activities of daily living, to assess practical day-to-day impact. Safety and tolerability, including documentation of adverse events, patient-reported symptoms, and any medical complications. Data will be obtained through remote telemedicine visits, structured digital surveys, and review of available medical records. This study does not collect biospecimens and does not involve the administration of any investigational product. The overarching objective is to generate high-quality real-world evidence regarding the use of MUSE stem cells in chronic TBI, supporting the scientific foundation needed for future controlled clinical trials and potential compassionate use pathways. The study is conducted by Healing Hope International, a nonprofit organization dedicated to advancing ethical access and research in regenerative medicine.