Related Experiment Video
Updated: Jul 17, 2026
07:03
Cryopreservation of Human Embryonic Stem Cell-Derived Retinal Pigment Epithelial Cells at the Optimal Stage
Published on: November 3, 2023
Cryopreservation of human embryonic stem cells: a protocol by programmed cooling
Peng-Fei Yang1, Tse-Chao Hua, Jing Wu
1Institute of Cryomedicine and Food Refrigeration, Shanghai University of Science and Technology, and Laboratory of Tissue Engineer, The 9th People's Hospital, Shanghai, China.
Cryo Letters
|January 27, 2007
Summary
This study optimized cryopreservation for human embryonic stem (ES) cells, enabling long-term storage. The developed protocol successfully preserved cell pluripotency and viability for future research applications.
Area of Science:
- Stem Cell Biology
- Cryobiology
- Regenerative Medicine
Background:
- Human embryonic stem (ES) cells are crucial for regenerative medicine and research.
- Maintaining ES cell pluripotency during culture is challenging.
- Long-term storage of ES cells is essential for widespread use.
Purpose of the Study:
- To develop and optimize a cryopreservation protocol for human ES cells.
- To ensure the long-term viability and pluripotency of cryopreserved human ES cells.
Main Methods:
- Programmed cooling technique was employed.
- Investigated effects of seeding temperature, cooling rate, and terminal temperature.
- Optimized protocol involved cooling to -35°C at 0.5°C/min with seeding at -10°C before liquid nitrogen immersion.
Main Results:
- Optimized protocol achieved high survival rates for cryopreserved human ES cell colony fragments.
- 9 out of 11 fragments survived freezing and thawing.
- Cryopreserved cells maintained pluripotency, normal karyotype, and alkaline phosphatase activity.
Conclusions:
- The developed cryopreservation protocol effectively preserves human ES cells.
- This method supports long-term storage and future applications of human ES cells.
- Cryopreservation is a viable technology for the widespread use of human ES cell lines.
