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Typical stem cells used in regenerative medicine research.
| Cell Type | Cell Origin | Ethical Issues | Gene Transfer | Differentiation Ability |
|---|---|---|---|---|
| Embryonic stem (ES) cells | Fertilized egg (inner cell mass) |
Yes | No | Versatile (every cell of adult tissue) |
| Induced pluripotent stem (iPS) cells | Body cells (autologous cells) |
No | Yes | Versatile (every cell of adult tissue) |
| Somatic stem cells (tissue stem cells) |
Body cells (autologous cells) |
No | No | Limited (only limited cell types can be differentiated) |
