types. As a result, many cells of medical interest cannot currently be obtained from adult-derived stem cells. It is also less feasible to develop large-scale cultures from adult stem cells. However, it is important to note that, at this time,

the time, are referred to as adult stem cells. The most well-known example of this are the hematopoietic stem cells of blood. More recently, mesenchymal stem cells (MSC) required for the maintenance of bone, muscle, and other tissues have

into a narrower range of cell types. As a result, many cells of medical interest cannot currently be obtained from adult-derived stem cells. It is also less feasible to develop large-scale cultures from adult stem cells. Nevertheless, because

Surrounding the Sources of Stem Cells At present, there are three possible sources of stem cells: adult stem cells derived from pediatric or adult donors; embryo germ cell stem cells (EG cells ) derived from aborted fetuses; and embryonic

specific type of multipotent stem cell called a mesenchymal stem cell has been shown to produce bone, muscle, cartilage, fat, and other connective tissues. There are many potential sources for stem cells. Embryonic stem cells are derived from

Adult Stem Cell Any stem cell taken from mature tissue, regardless of the age of the donor. Related Topics: Genetics Contributed by: AAAS/DoSER Search for Adult Stem Cell

the bone marrow, the neural stem cells produced a variety of blood cell types including myeloid and lymphoid cells as well as early hematopoietic cells. This shows two things. First, the neural stem cells appear to have a wider differentiation

embryo to participate in stem cell research to the greatest degree possible, stem cells (and stem cell “lines”) should be identified with respect to their provenance. Patients and researchers should be able to avoid participating in

issues raised by stem cell research. The most medically promising stem cells, with a capacity to differentiate into any of the human body’s cell types, are derived either from the inner cell mass of preimplantation embryos (ES

of every human cell. The potential of a stem cell to become a human being seems to be much more like that of a somatic cell that could be cloned than like an embryo. The natural development of the individual cells of the embryonic