Can trauma exposure cause epigenetic changes in stress and immune pathways?
Trauma exposure can lead to lasting changes in how your genes work through a process called epigenetics. Epigenetic changes do not alter your DNA sequence but can turn genes on or off, affecting stress and immune system function. Research shows that trauma can cause epigenetic changes in pathways related to stress response, immune-inflammatory signaling, and neurodevelopment 578.
What the research says
A 2025 systematic review found that across different types of trauma, epigenetic changes most consistently involve stress-response regulation and immune-inflammatory signaling pathways 5. This review included studies from 1990 to 2025 and reported that acute trauma is often linked to stress and inflammatory changes, while chronic trauma leads to broader alterations in stress-regulatory and metabolic processes 5.
A 2025 study using over two million brain cell nuclei from people with and without PTSD identified specific gene changes in inhibitory neurons, endothelial cells, and microglia, affecting glucocorticoid signaling, GABAergic transmission, and neuroinflammation 7. This study confirmed disruption of key genes like SST and FKBP5, which are involved in stress and immune responses 7.
Another study from 2019 explained that environmental factors, including trauma, can cause lasting epigenetic changes that influence risk for psychiatric disorders 8. A 2022 study on paramedicine students found that exposure to work-related trauma was associated with changes in epigenetic age, which is a measure of biological aging linked to stress and immune function 9.
What to ask your doctor
- How might trauma exposure affect my physical health through stress and immune pathways?
- Are there any tests available to measure epigenetic changes related to trauma?
- What treatments or therapies can help address the biological effects of trauma?
- Can lifestyle changes like diet, exercise, or stress management influence epigenetic changes?
- Should I be concerned about intergenerational effects of trauma on my children?
This question is drawn from common patient questions about Genetics & Precision Medicine and answered using cited medical research. We do not provide individualized advice.