Tissue Engineering and Regenerative Medicine
Regenerative medicine may be defined as the process of replacing or “regenerating” human cells, tissues, or organs to restore or establish normal function. This field holds the promise of regenerating damaged tissues and organs in the body by replacing damaged tissue or by stimulating the body’s own repair mechanisms to heal tissues or organs. Regenerative medicine also may enable scientists to grow tissues and organs in the laboratory and safely implant them when the body is unable to heal itself. Current estimates indicate that approximately one in three Americans could potentially benefit from regenerative medicine.
Regenerative Medicine refers to a group of biomedical approaches to clinical therapies that may involve the use of stem cells. Examples include cell therapies (the injection of stem cells or progenitor cells); immunomodulation therapy (regeneration by biologically active molecules administered alone or as secretions by infused cells); and tissue engineering (transplantation of laboratory-grown organs and tissues).
While covering a broad range of applications, in practice the latter term is closely associated with applications that repair or replace portions of or whole tissues (i.e., bone, cartilage, blood vessels, bladder, skin). Often, the tissues involved require certain mechanical and structural properties for proper functioning. The term has also been applied to efforts to perform specific biochemical functions using cells within an artificially-created support system (e.g., artificial pancreas or liver).
Regenerative medicine has made its way into clinical practice with the use of materials that are able to assist in the healing process by releasing growth factors and cytokines back into the damaged tissue (e.g., (chronic) wound healing). As additional applications are researched, the fields of regenerative medicine and cellular therapies will continue to merge and expand, potentially treating many disease conditions and improving health for a variety of diseases and health conditions.
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