This is a single centered, randomized, single blind phase II clinical study. Patients will be divided into two groups of case and control. Patients of case group will receive intra-articular injection of autologous AMSCs suspended in 3 ml autologous PRP for 3 times, patients of control group will receive intra-articular injection of 3 ml of autologous PRP for 3 times. The investigators designed this clinical study to evaluate therapeutic effects of AMSCs in patients with severe knee osteoarthritis.
The purpose of this study is to explore the efficacy and safety of autologous adipose-derived mesenchymal stem cells (AMSCs) plus autologous platelet rich plasma (PRP) in the treatment of severe knee osteoarthritis.