Supplementary Material for: Safety and Efficacy of Givinostat for patients with Muscular dystrophy: A Systematic review

Introduction: Muscular dystrophy(MD) refers to a group of genetic disorders leading to progressive weakness and degeneration of skeletal muscle. Among them, Duchenne muscular dystrophy(DMD) and Becker muscular dystrophy(BMD) are the most common types. Histone deacetylase(HDAC) inhibitors(i.e. Givinostat) are a recently approved therapy for DMD. In this systematic review, we aim to evaluate Givinostat in MD patients regarding safety and efficacy.
Methods: A systematic review was performed according to the PRISMA guidelines by searching through Medline, Embase, Cochrane Library and Web of Science. Only RCT comparing Givinostat vs placebo or other therapies are included. The primary outcomes were motor function alteration and histopathologic muscle changes and the secondary outcomes were the adverse reactions.
Results: A total of 188 records were identified, and after screening, two clinical trials met the inclusion criteria. In DMD patients, Givinostat significantly slowed disease progression, improving four stair-climb times (p=0.037) and reducing muscle fat infiltration. In BMD patients, fibrosis progression was not significantly different (p=0.8282), but MRI showed reduced muscle fat replacement. Common adverse events included diarrhea, thrombocytopenia, and hypertriglyceridemia, leading to dose reductions, though no new safety signals or treatment-related deaths were observed.
Discussion: Givinostat seems to be effective in slowing disease progression in DMD but has little benefit in BMD. Its safety profile requires rigorous monitoring. Efficacy difference might be explained by the pathophysiology of the disease and the progression rate. Larger and longer follow-up trials are warranted to confirm longer term benefits and to optimize dosing strategies.
Conclusion: Givinostat offers potential as a disease-modifying therapy for DMD but requires further investigation to establish its role in BMD.