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Preparation of Mouse Embryonic Fibroblast Cells Suitable for Culturing Human Embryonic and Induced Pluripotent Stem Cells
Published on: June 21, 2012
Conditionally immortalized mouse embryonic fibroblasts retain proliferative activity without compromising multipotent
Enyi Huang1, Yang Bi, Wei Jiang
1School of Bioengineering, Chongqing University, Chongqing, China.
Plos One
|March 3, 2012
Summary
Conditionally immortalizing mouse mesenchymal progenitors with SV40 large T antigen enables long-term proliferation while retaining multipotency. This reversible method supports mesenchymal stem cell research and potential clinical applications.
Area of Science:
- Cell Biology
- Stem Cell Research
- Molecular Biology
Background:
- Mesenchymal stem cells (MSCs) are multipotent cells crucial for regenerative medicine.
- Primary MSCs have limited in vitro lifespan, hindering research and clinical use.
- Developing methods for long-term MSC culture is essential for advancing their applications.
Purpose of the Study:
- To investigate the conditional immortalization of mouse mesenchymal progenitors using SV40 large T antigen.
- To assess if immortalized cells retain multipotency and differentiation capacity.
- To evaluate the safety and efficacy of this reversible immortalization strategy.
Main Methods:
- Utilized a Cre/loxP system for conditional expression of SV40 large T antigen in mouse embryonic fibroblasts (MEFs).
- Established conditionally immortalized MEFs (iMEFs) and assessed their proliferation and differentiation potential.
- Evaluated the reversibility of immortalization by Cre recombinase and tumorigenicity in vivo.
Main Results:
- Conditionally immortalized MEFs (iMEFs) demonstrated enhanced, long-term proliferative capacity.
- iMEFs maintained expression of MSC markers and multipotency, differentiating into bone, cartilage, and adipose lineages.
- Immortalization was reversible with Cre recombinase, and iMEFs showed no tumorigenicity in athymic nude mice.
Conclusions:
- Conditional immortalization with SV40 large T antigen is an effective strategy for establishing long-term cultures of mesenchymal progenitors.
- This approach preserves multipotency and differentiation potential, crucial for research and clinical applications.
- Reversible immortalization offers a safe and efficient method for expanding MSCs for various scientific and therapeutic purposes.
