 Osteoarthritis OA is a common and incurable disease for the elderly in Taiwan, so it is an important mission to develop a new treatment for OA. Recently, cellular therapy is a new and popular medical treatment around the world, one of them is Mesenchymal Stromal Cells MSCs. MSCs are found in many tissues of human body and play an important role for repairing, regeneration, anti-inflammatory and chondrogenesis. So, MSC product, RegStem, for osteoarthritis treatment becomes a developing target for new generation drugs. 