[The expansion and biological characteristics of human mesenchymal stem cells].

Objective: Mesenchymal stem cells (MSCs) were adult stem cells which contribute to the regeneration of mesenchymal tissues such as bone cartilage, muscle, ligament, tendon, adipose and stroma. Due to the multipotential ability and self-renewal capacity, the mesenchymal stem cells can be applied in many fields, such as the seed cells in tissues engineering, cell therapy and gene therapy. To enhance the clinical use of MSCs, the investigators studied the isolation and expansion of MSCs from adult bone marrow, fetal bone marrow and human umbilical cord blood, and investigated their biological identities.