Cell Immortalization: In Vivo Molecular Bases and In Vitro Techniques for Obtention

Area of Science:

• Cell Biology
• Genetics
• Molecular Biology

Background:

• Somatic cells have a finite replicative capacity, known as the Hayflick limit, due to telomere erosion with each cell division.
• This limitation necessitates frequent cell passaging for extended research, impacting study duration and efficiency.
• Certain cells, like stem and cancer cells, exhibit high replicative potential by maintaining telomere length.

Purpose of the Study:

• To explore the mechanisms behind cellular immortality and overcome the Hayflick limit for research purposes.
• To develop cell immortalization technology for creating cell lines with unlimited replicative capacity.
• To enable more prolonged and less labor-intensive cellular studies.

Main Methods:

• Investigating cellular and molecular bases of telomere maintenance mechanisms (telomerase and alternative lengthening).
• Studying genes controlling the cell cycle, including p53 and Rb.
• Utilizing technologies such as viral oncogenes, myc genes, ectopic telomerase expression, and cell cycle gene manipulation.

Main Results:

• Understanding of telomere maintenance mechanisms in high-replicative potential cells.
• Development of cell immortalization technology.
• Successful generation of cell lines with infinite replicative capacity.

Conclusions:

• Cell immortalization technology, derived from studying telomere maintenance and cell cycle regulation, provides a solution to the Hayflick limit.
• This technology allows for the creation of stable cell lines for extended research, overcoming limitations of finite cell division.
• Applications include the use of viral oncogenes, myc genes, telomerase, and manipulation of cell cycle regulators like p53 and Rb.