Introduction
Toxicoepigenetics explores how environmental toxins interact with the epigenome to cause diseases, not altering the DNA. Some source from large concentration of metals, tobacco products, and pollution. Studying toxicoepigenetics will help us learn about how environmental exposures, lifestyles, and diet all affect health. Not only studying humans, animal health is also researched, focusing on four main areas that can improve human health: epigenetic change in environment-induced disease, key factors of influencing vulnerability, biomarkers of the environmental exposures, and whether the effects of epigenetic diseases are reversible.
Methods
Researchers observed humans and animals based on exposure to environmental factors, diet, and chemical exposures. These exposures were used to observe epigenetic changes, including DNA methylation, altering chromatin structures and gene expression; DNA Hydroxymethylation, by analyzing the TET enzyme activity; and non-coding RNA activity, ones that do not become proteins, but instead regulate gene expression, chromatin structure, and cellular metabolism. Detecting these molecular changes can help us link them to disease risk and health effects.
Results
Environmental exposures correlated with changes in epigenetic markers, especially in DNA methylation, DNA Hydroxymethylation, and non-coding RNA activity. Overall, higher exposure to pollutants and toxic chemicals show greater epigenetic reactions, suggesting a dose-dependent effect. These changes were often linked to an increased risk of diseases including cancer, respiratory conditions, and developmental disorders. Overall, environmental factors do impact normal gene regulation, helping explain how lots of exposure leads to long-term health effects. Rather than causing immediate mutations, toxins influence how genes react, which can still significantly impact disease risk.
Some findings are based on animals or cells, which may not fully reflect full human biological responses. In addition, differences in study design, sample size, and exposure make it difficult to compare results since individuals have different reactions, meaning we should not link specific diseases to sicknesses when we do not fully understand what is happening.
Conclusion
Toxicoepigenetics can help identify epigenetic biomarkers that reveal past environmental exposures and explain how those exposures lead to disease at a molecular level. However, factors like age, sex, ethnicity, socioeconomic status, and existing health conditions can influence both susceptibility and how reliable these biomarkers are. There are also challenges in interpreting data from mixed cell tissues. Having a good diet and lifestyle can also help reduce the risks of toxic exposures. Looking forward, CRISPR and similar systems will help reverse the effects of environment-mediated epigenetic changes and disease.
