Stem cells are unspecialized cells that are capable of self-renewal through mitotic cell division, even after long periods of inactivity. Stem cells may be induced to form more specialized cells of a tissue or organ by a process termed cellular differentiation, which is defined by the potency of a cell.
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Due to their regenerative potential, stem cells in some tissues and organs are utilized to repair or replace old or damaged cells and this property may be useful in regenerative medicine. In other tissues such as the heart, this does not occur and stem cells only divide under strict conditions.
The 2 main types of stem cells are: embryonic stem cells (ESCs) found in the inner cell mass of blastocysts, and adult stem cells found in adult tissues, primarily the bone marrow.
Stem cells may offer new therapeutic potential for treating many diseases including cancer.
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March 28 - April 1, 2015