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Embryonic stem cell lines of nonhuman primates
Norio Nakatsuji1, Hirofumi Suemori
1Department of Development and Differentiation, Institute for Frontier Medical Sciences, Kyoto University, 53 Kawaharacho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan. nnakatsu@frontier.kyoto-u.ac.jp
Thescientificworldjournal
|June 14, 2003
Summary
Nonhuman primate embryonic stem (ES) cells offer valuable research tools for cell therapy and regenerative medicine. Advances in culture methods now allow for stable, undifferentiated primate ES cell lines, crucial for disease modeling and therapeutic development.
Area of Science:
- Stem Cell Biology
- Regenerative Medicine
- Primate Research
Background:
- Human embryonic stem (ES) cells hold significant promise for cell therapy and regenerative medicine.
- Nonhuman primate ES cell lines share similarities with human counterparts, offering unique research advantages.
- Ethical and regulatory considerations often favor the use of nonhuman primate models over human ES cells.
Purpose of the Study:
- To explore the potential of nonhuman primate ES cell lines as research tools.
- To investigate the similarities and differences between monkey and human ES cells.
- To establish and characterize stable primate ES cell lines for therapeutic research and disease modeling.
Main Methods:
- Establishment of ES cell lines from monkey blastocysts (naturally produced or via IVF/ICSI).
- Characterization of ES cell markers (alkaline phosphatase, SSEA-4, SSEA-3).
- Assessment of pluripotency through embryoid body formation, in vitro differentiation, and teratoma formation in SCID mice.
- Optimization of culture conditions, including serum-free media and enzymatic subculturing.
Main Results:
- Primate ES cell lines express key pluripotency markers and form derivatives of all three germ layers.
- Challenges in maintaining primate ES cell pluripotency due to spontaneous differentiation and stress susceptibility were identified.
- Improved culture methods, including serum-free media and trypsin treatment, enable stable maintenance of undifferentiated cynomolgus monkey ES cells with normal karyotype for over a year.
Conclusions:
- Nonhuman primate ES cell lines are valuable models for studying stem cell regulation and differentiation.
- These cell lines are indispensable for preclinical testing of cell therapies, evaluating efficacy, safety, and immune responses.
- Advancements in culture techniques facilitate the long-term maintenance of undifferentiated primate ES cells, paving the way for broader applications in stem cell research and therapy.