Safety and Efficacy of UC-MSCs in Patients With Plaque Psoriasis

Psoriasis is a chronic, incurable, immune-mediated dermatological disease, and it is considered that immune system dysregulation is the important cause of the disease.Umbilical cord derived mesenchymal stem cells (UC-MSCs) have be proven safe and effective for the treatment of various intractable autoimmune and inflammatory disorders because of their distinct immunomodulatory properties. Patients will be randomized into three groups.In one group patients will be treated with 1x10\^6 cells/kg in 0,1,2,3,5,7 week, in the second group patients will be treated with 3x10\^6 cells/kg in 0,1,2,3,5,7 week,in the third group patients will be treated with 5-25mg Methotrexate from 0 to 15 week In this study, researchers will determine the safety of UC-MSCs that a patient can tolerate without causing side effects. Moreover researchers will also be assess the efficacy and sustainability of UC-MSCs in 52 weeks.