{"id":3710,"date":"2025-02-20T17:27:43","date_gmt":"2025-02-20T17:27:43","guid":{"rendered":"https:\/\/integrativa.pt\/?p=3710"},"modified":"2026-01-26T18:45:48","modified_gmt":"2026-01-26T18:45:48","slug":"epigenetics-the-influence-of-the-environment-on-health-regulation-from-a-psychoneuroimmunological-perspective","status":"publish","type":"post","link":"https:\/\/integrativa.pt\/en\/epigenetica-a-influencia-do-ambiente-na-regulacao-da-saude-a-visao-da-psiconeuroimunologia\/","title":{"rendered":"Epigenetics: the influence of the environment on health regulation, the view from Psychoneuroimmunology"},"content":{"rendered":"
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Scientific research has shown that genetic information does not act in isolation, nor does it determine health trajectories throughout life in a linear fashion. Epigenetics, a field that studies the biochemical mechanisms that regulate gene expression without altering the DNA sequence, contributes to a more dynamic understanding of human biology by highlighting the continuous interaction between genetic, environmental and behavioural factors.<\/p>\n

In this context, genetic predisposition can be understood as a set of biological possibilities whose expression is modulated by multiple variables over time. Food, stress,<\/em> sleep, environmental exposure and physical activity influence cellular processes that regulate which genes tend to be more or less expressed in certain physiological contexts.<\/p>\n

A metaphor often used to clarify this concept describes genes as light bulbs in a space, while the organism's internal and external environment acts as a system of switches that condition their activation or inhibition. This perspective does not eliminate the role of genetics, but broadens the understanding of the factors that contribute to individual variability in health.<\/p>\n

The role of epigenetics in metabolic health<\/h4>\n

For decades, conditions such as obesity, type 2 diabetes, changes in lipid profile and cardiovascular disease have been interpreted predominantly as direct consequences of genetic inheritance or ageing. Research into epigenetics has shown that these conditions result from complex interactions between genetic predisposition and environmental factors, with an impact on metabolic, inflammatory and hormonal regulation.<\/p>\n

Epigenetic mechanisms, such as DNA methylation or histone modifications, influence the expression of genes involved in energy metabolism, the immune response and low-grade inflammation. These changes largely reflect the body's cumulative exposure to certain stimuli over time, without implying determinism or irreversibility.<\/p>\n

Factors associated with modulating gene expression<\/h4>\n