"Because MenSCs possess good immunosuppressive properties, they are able to intravenously inject large amounts of cells to injured body. From short-term studies, they are safe and reliable after cell transplantation, and they migrate into the inflammatory or injured sites, which has a regenerative inhibitory effect on inflammation. Currently, no evidence of tumor or toxicity following administration of MenSC has been found in nude mice. Moreover, we assessed that MenSCs had significant inhibitory effects on tumor growth in a mouse glioma model. No obvious physiological or serological abnormalities were observed in four patients with multiple sclerosis for the use of MenSCs. Although researches indicate that MenSCs are rapidly evolving, it is not yet determined how long MenSCs can survive in foreign bodies and there are no data guaranteeing their long-term safety owing to lack of specific markers to monitor these cells in vivo."