Adipose-derived stem cells and their secretory factors for skin aging

The term stem cell has attracted increasing attention of the scientific community as well as of the general public. In many aspects, however, it is still confusing and difficult to understand and interpret information about stem cells. They are vital to humans for numerous reasons. Groups of stem cells in some adult tissues give rise to replacement cells for the tissues that are destroyed through injury, disease, or aging [1]. Knowledge relating to how healthy cells replace diseased or otherwise damaged cells, would allow development of medical therapies focusing on creation of compatible cell lines to replace aged or diseased cells in the body. The concept of regenerative medicine using the body's own stem cells and growth factors to repair tissue may be realizable as science and clinical experience converge to develop alternative therapeutic strategies to treat the damaged or diseased tissue. Stem cell-based therapies are also being tried in tissue engineering: The aim of tissue engineering is to repair and regenerate damaged organs or tissues using a combination of cells, biomaterials, and cytokines [1-4].