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Effect of Polypeptides on Cell Proliferation and Apoptosis during Aging
A P Ryzhak1, N I Chalisova1,2, N S Lin'kova3,4,5
1St. Petersburg Institute of Bioregulation and Gerontology, St. Petersburg, Russia.
Bulletin of Experimental Biology and Medicine
|March 1, 2017
Summary
Tissue polypeptide complexes promote cell renewal and regeneration in aging animals by reducing apoptosis and increasing proliferation. These findings suggest potential for therapeutic applications in age-related tissue repair.
Area of Science:
- Biogerontology
- Regenerative Medicine
- Molecular Biology
Background:
- Aging is associated with decreased tissue regeneration and increased cellular damage.
- Polypeptide complexes are known to play roles in cellular processes.
- Understanding factors that promote tissue renewal is crucial for combating age-related decline.
Purpose of the Study:
- To investigate the effect of polypeptide complexes from various organs on cell renewal in organotypic cultures.
- To determine the correlation between animal age and the intensity of regenerative processes.
- To analyze the impact of polypeptide complexes on key apoptosis and proliferation markers.
Main Methods:
- Organotypic cultures of tissues (bronchi, blood vessels, muscles, kidneys, ovaries, testes, retina) from young and old animals were used.
- Polypeptide complexes derived from corresponding organs were applied to the cultures.
- Expression levels of apoptotic factors (p53, caspase 3) and proliferation marker (Ki-67) were measured.
Main Results:
- Polypeptide complexes stimulated cell renewal in organotypic cultures of corresponding organs.
- A correlation was observed between the intensity of regeneration and the age of the animals.
- Treatment with polypeptide complexes reduced the expression of p53 and caspase 3, while increasing Ki-67 expression.
Conclusions:
- Tissue-derived polypeptide complexes can stimulate regenerative processes in aging tissues.
- These complexes modulate apoptosis and proliferation pathways, offering a potential therapeutic strategy.
- Further research into polypeptide complexes is warranted for age-related regenerative medicine.
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