Cellular Senescence Triggered By Food And Environmental Genotoxins
Our bodies are constantly exposed to various substances from the food we eat and the environment around us. Some of these substances, known as “genotoxins,” have the ability to damage our DNA. When cells detect this damage, they can enter a state called “cellular senescence,” where they permanently stop dividing. This isn’t cell death, but rather a dormant state where the cell remains active but can no longer multiply.
This process is a natural defense mechanism, but an accumulation of these senescent cells over time is strongly linked to aging and the development of many age-related conditions, including certain cancers and neurodegenerative disorders. The review points out that common exposures like components in tobacco smoke, air pollution, certain food contaminants (such as mycotoxins), and even compounds formed from red meat can act as genotoxins, triggering this cellular shutdown.
When cells become senescent, they often release a mix of inflammatory molecules, growth factors, and enzymes, collectively known as the “senescence-associated secretory phenotype” (SASP). This SASP can negatively affect neighboring healthy cells and contribute to chronic inflammation, further driving tissue damage and disease progression. Understanding how these everyday exposures contribute to cellular senescence suggests that reducing our contact with such genotoxic agents could be a valuable strategy in promoting healthier aging and preventing age-related health issues.
Source: link to paper