Britannica
Sources used in this answer
How do induced pluripotent stem cells differ from embryonic stem cells?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
stem cell
Stem cells of neural and hematopoietic origin have tremendous potential in the development of therapies for certain diseases, such as diabetes and Parkinson disease. Neural stem cells occur in the spinal cord and in specific regions of the brain, and hematopoietic stem cells occur in the blood and bone marrow.
While both embryonic stem cells (ESCs) and induced pluripotent stem cells (iPS cells) are pluripotent—meaning they can differentiate into any cell type in the body—they differ significantly in their origin and ethical implications.12
Key Differences
- Source: ESCs are derived from the inner cell mass of a mammalian embryo at the blastocyst stage. In contrast, iPS cells are generated by "reprogramming" mature, fully differentiated adult somatic cells (such as skin or liver cells) back into a primitive, stem-like state.312
- Ethical Considerations: The use of ESCs is often subject to debate regarding the moral status of human embryos. iPS cells provide a vital alternative that avoids the use of embryos, thereby bypassing many of these ethical concerns.425
- Clinical Potential: Because iPS cells can be created from a patient’s own tissues, they offer the potential for autologous (patient-specific) transplantation, which significantly reduces the risk of immune rejection. ESCs, being allogeneic, may be subject to rejection by the recipient's immune system.125
Ethical research practices are essential in this field, particularly regarding informed consent, the regulation of experimental therapies, and ensuring equitable access to regenerative medicine.4