Among the studies conducted in mice, the change in body weight, the clinical score, the inverted screen hang time, the C3 deposit level, the neuromuscular junction IgG deposit level and the serum level of both anti-acetylcholine receptor and anti-muscle-specific tyrosine kinase antibodies were the outcomes used by most studies selected in this systematic review to assess the potential of hMSCs administration for the treatment of myasthenia gravis. The gene discussed is C3; the disease is myasthenia gravis.