Stem Cells

Abstract

Stem cell, a specialized cell, that has a unique capability to renew itself and differentiated in to many kinds of specific cell types such as bone, cartilage and muscle cells. It can be distinguished in to two kinds based on degree of differentiation. Embryonic stem cell, the cell which derived from a group of cells called the inner cell mass and adult stem cell, the undifferentiated cell which derived from a specialized tissue in the adult e.g. blood and bone. Embryonic stem cell, although can be able to generate a broad range of cell types but it can induce the formation of the teratomas and has a problem about the ethic. Whereas adult stem cell, although has limited in a proliferation and generated a narrow range of cell types, but it has many advantages as it can be easily received, has no ethical problem and immunological rejection moreover it also can reduce the risk of tumor formation. Form the above reasons; therefore recently the utilization of adult stem cell is markedly increased.