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Stem cells: you can't tell a cell by its cover
1Division of Reproductive Sciences, Fran and Lawrence Bloomberg Department of Obstetrics and Gynecology, Samuel Lunenfeld Research Institute, Mount Sinai Hospital and The University of Toronto, Toronto, Ontario, Canada.
Human Reproduction Update
|March 18, 2003
Summary
Human embryonic stem cells face ethical and practical challenges. Umbilical cord blood stem cells offer a promising alternative for regenerative medicine, potentially replacing embryonic stem cells in therapies.
Area of Science:
- Regenerative Medicine
- Stem Cell Biology
Background:
- Human embryonic stem cells (ES cells) possess self-renewal and differentiation potential but raise ethical concerns and require extensive HLA matching for therapeutic use.
- Adult stem cells, particularly from bone marrow and umbilical cord blood (UCB), demonstrate multilineage differentiation capacity.
Purpose of the Study:
- To explore the potential of umbilical cord blood (UCB) hematopoietic stem cells as an alternative to human embryonic stem cells (ES cells) for tissue and cell therapeutics.
Main Methods:
- Review of existing literature on the differentiation capabilities of adult stem cells, including UCB hematopoietic stem cells.
- Comparison of the properties and potential applications of UCB hematopoietic stem cells versus human ES cells in regenerative medicine.
Main Results:
- UCB hematopoietic stem cells are equivalent to bone marrow stem cells for hematopoietic reconstitution.
- Preliminary evidence suggests UCB hematopoietic stem cells can differentiate into non-blood cell types, indicating multipotency.
Conclusions:
- Umbilical cord blood (UCB) hematopoietic stem cells present a viable, ethically less contentious alternative to human embryonic stem cells (ES cells).
- UCB stem cells, normally discarded, could be utilized for developing novel tissue and cell therapeutics, overcoming limitations associated with ES cells.