Apply to trial NCT07086521

Safety and Preliminary Efficacy of ULSC in Facioscapulohumeral Muscular Dystrophy (FSHD)

The goal of this clinical trial is to learn about how an umbilical cord lining-derived stem cell product (ULSC) performs when treating Facioscapulohumeral Muscular Dystrophy (FSHD) 1 or 2. It will assess safety and preliminary efficacy in relieving symptoms of FSHD with ULSC administered in two intravenous (IV) doses of 100 million cells per dose. The main questions that this study plans to answer are: * Is ULSC as safe as placebo (a look-alike saline without cells) in repeated IV infusion? * Does ULSC improve symptoms of FSHD after each dose? Researchers will compare ULSC to placebo. Participants will: * Have been diagnosed with FSHD of a Ricci clinical severity score 3 or more. * Participate in this study for total duration of 21 months with 11 in-person visits and 5 virtual visits. * Visit the clinic for a total of 4 IV infusions (250 mL) 3 months apart. * Receive 2 doses of ULSC and 2 doses placebo in either of two sequences, as assigned: ULSC first (Day 0 and Month 3) and placebo second (Month 6 and Month 9), or placebo first (Day 0 and Month 3) and ULSC second (Month 6 and Month 9). * Return for follow-up visits after each dose and up to 12 months after final dose.