CONTRIBUTIONS TO THE STUDY OF THE MECHANISM OF THE GROWTH OF CONNECTIVE TISSUE

Area of Science:

• Cell Biology
• Tissue Engineering
• Developmental Biology

Background:

• Cellular growth and proliferation are fundamental processes in biology.
• Understanding the factors influencing cell growth is crucial for various scientific applications.
• Previous research focused on cell survival rather than indefinite proliferation in vitro.

Purpose of the Study:

• To investigate the relationship between culture medium composition and connective tissue cell growth rate.
• To determine if connective tissue cells can achieve indefinite proliferation outside the organism.
• To explore the potential for modifying cell growth dynamics through external factors.

Main Methods:

• Cultivating connective tissue cells in a repeatedly changed medium.
• Modifying the culture medium with substances like embryonic juices.
• Monitoring cell proliferation and viability over extended periods (months) and passages.

Main Results:

• A direct correlation was established between culture medium composition and cell growth rate.
• Cell proliferation could be accelerated or retarded by adding specific substances.
• Connective tissue cells from chick embryo heart demonstrated indefinite proliferation in vitro for over sixteen months and 190 passages.
• The proliferation rate of aged in vitro cells equaled or exceeded that of fresh embryonic tissue.
• Cells were in a state of active multiplication, not mere survival.

Conclusions:

• The composition of the culture medium dynamically influences connective tissue cell growth.
• Indefinite proliferation of connective tissue cells in vitro is achievable.
• This technique enables sustained, active cell life outside the organism, independent of time.
• The findings support the concept of 'real life' for cells in vitro, characterized by indefinite multiplication.