- Unspecialized cells
- Proliferation and slef-renewal
- Differentiation into a various cell
Types of stem cells
- Hematopoietic stem cells(HSC)
- Neuronal stem cells (NSC)
- Fertilized eggs
- Mesenchymal stem cells(MSC)
Stem cells come from
Technical problems & safety issues
1. Embryonic stem (ES) cells
» Fertilized eggs, duplication of somatic cells
» Stem cells (inner cell mass)
2. Induced pluripotent stem (iPS) cells
» It is derived from a somatic cell by inducing specific genes, and become
like an embryonic stem cell.
3. Adult (somatic) stem cells
Fetal stem cells
» Umbilical Cord blood, Placenta etc.
Adult stem cells
» Maintain and repair the tissue in which they are found.
» Bone marrow, adipose tissue, skin, nerve tissue, muscle