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Concept
Regenerative medicine
Summary
Regenerative medicine deals with the "process of replacing, engineering or regenerating human or animal cells, tissues or organs to restore or establish normal function". This field holds the promise of engineering damaged tissues and organs by stimulating the body's own repair mechanisms to functionally heal previously irreparable tissues or organs.
Regenerative medicine also includes the possibility of growing tissues and organs in the laboratory and implanting them when the body cannot heal itself. When the cell source for a regenerated organ is derived from the patient's own tissue or cells, the challenge of organ transplant rejection via immunological mismatch is circumvented. This approach could alleviate the problem of the shortage of organs available for donation.
Some of the biomedical approaches within the field of regenerative medicine may involve the use of stem cells. Examples include the injection of stem cells or progenitor cells obtained through directed differentiation (cell therapies); the induction of regeneration by biologically active molecules administered alone or as a secretion by infused cells (immunomodulation therapy); and transplantation of in vitro grown organs and tissues (tissue engineering).
The ancient Greeks postulated whether parts of the body could be regenerated in the 700s BC. Skin grafting, invented in the late 19th century, can be thought of as the earliest major attempt to recreate bodily tissue to restore structure and function. Advances in transplanting body parts in the 20th century further pushed the theory that body parts could regenerate and grow new cells. These advances led to tissue engineering, and from this field, the study of regenerative medicine expanded and began to take hold. This began with cellular therapy, which led to the stem cell research that is widely being conducted today.
The first cell therapies were intended to slow the aging process. This began in the 1930s with Paul Niehans, a Swiss doctor who was known to have treated famous historical figures such as Pope Pius XII, Charlie Chaplin, and king Ibn Saud of Saudi Arabia.
Official source
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