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Human pulp-derived cells immortalized with Simian Virus 40 T-antigen
Kerstin M Galler1, Helmut Schweikl, Birger Thonemann
1Department of Operative Dentistry and Periodontology, University of Regensburg, Germany. kerstin.galler@uth.tmc.edu
European Journal of Oral Sciences
|April 25, 2006
Summary
Researchers immortalized human pulp cells using Simian Virus 40 (SV40) large T-antigen to overcome senescence. This created a stable cell line for extensive research into dentin formation and cellular pathways.
Area of Science:
- Biomaterials Science
- Cell Biology
- Regenerative Medicine
Background:
- Primary human pulp cells have limited proliferation capacity due to cellular senescence, hindering research.
- Investigating cellular pathways, gene regulation, dentin formation, and material responses is challenging with senescent cells.
Purpose of the Study:
- To establish an immortalized human pulp cell line for extended research.
- To overcome the limitations of cellular senescence in primary human pulp cells.
Main Methods:
- Primary human pulp cells were transfected with Simian Virus 40 (SV40) large T-antigen.
- Reverse transcription-polymerase chain reaction (RT-PCR) and immunohistochemistry were used to verify T-antigen expression.
- Phenotypic characteristics and gene/protein expression of immortalized cells were analyzed and compared to primary cells.
Main Results:
- Transfection extended the lifespan of human pulp cells, enabling culture to passage 18.
- One immortalized clone was maintained for 55 weeks, retaining key phenotypic characteristics.
- Detected expression of cell-specific markers like collagen types I and III, alkaline phosphatase, and dentin matrix proteins.
Conclusions:
- SV40 large T-antigen transfection successfully immortalized human pulp-derived cells.
- The resulting cell line retains crucial phenotypic characteristics of primary pulp cells.
- This immortalized cell line provides a valuable tool for future research in dentistry and regenerative medicine.