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Post-traumatic Stress Disorder

Post-traumatic Stress Disorder

Post-traumatic stress disorder (PTSD) is a psychiatric condition that arises following exposure to traumatic events such as natural disasters, forced displacement, or severe accidents. It significantly impairs individuals' ability to cope with daily activities and disrupts their emotional and psychological equilibrium.
Symptoms and Behavioral Manifestations
A spectrum of distressing symptoms characterizes PTSD. Recurrent flashbacks, where individuals involuntarily relive traumatic events, are a...

Psychoneuroimmunology: Cardiovascular Disease

Psychoneuroimmunology: Cardiovascular Disease

Psychoneuroimmunology (PNI) is a multidisciplinary field that examines how psychological factors, particularly stress, interact with the immune system and impact physical health. Research in PNI has shown that chronic or traumatic stress can disrupt both the hypothalamic-pituitary-adrenal axis and the sympathetic nervous system. These disruptions contribute to serious health conditions, including cardiovascular diseases.
A key area of focus in PNI is the relationship between stress and coronary...

Introduction to Stress and Lifestyle

Introduction to Stress and Lifestyle

Stress is a multifaceted response to events perceived as challenging or threatening, highlighting physical, emotional, cognitive, and behavioral reactions. Physically, stress can lead to fatigue, sleep disruptions, and various health issues such as frequent colds, chest pains, and nausea. Emotionally, it can manifest as anxiety, depression, irritability, and anger triggered by both minor and major life events. Cognitively, it may result in difficulty in concentration, memory, and...

Psychoneuroimmunology: Diabetes and Cancer

Psychoneuroimmunology: Diabetes and Cancer

Chronic stress has been linked to both the onset and progression of serious health conditions, including Type 2 diabetes and cancer. Type 2 diabetes, a widespread chronic illness, is closely associated with obesity and insulin resistance, both of which often worsen under stress. Studies indicate that men experiencing high levels of chronic stress face a 45% higher risk of developing diabetes compared to those with minimal stress. Stress triggers physiological responses that elevate blood...

Stress and Mental Health

Stress and Mental Health

Chronic stress profoundly affects mental health, significantly influencing mood, behavior, and overall quality of life. Research closely links chronic stress with mental health conditions such as depression, anxiety, and substance use disorders. Ongoing exposure to stress can lead to physiological and psychological changes, initiating a cycle of emotional distress and maladaptive coping mechanisms.
Individuals with depression often experience challenges in both their personal and professional...

Traumatic Memory

Traumatic Memory

Emotionally traumatic events often lead to memories that are exceptionally vivid and enduring, sometimes persisting with remarkable clarity throughout an individual's life. A classic example of this phenomenon is a person who survives a car accident. Even years later, they may recall every detail of the event with startling accuracy — the screeching of the tires, the jarring impact, and the acrid smell of burning rubber. Such vividness contrasts sharply with how an individual remembers mundane...

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Related Experiment Video

Updated: Jun 13, 2026

Rapid Fractionation and Isolation of Whole Blood Components in Samples Obtained from a Community-based Setting

Rapid Fractionation and Isolation of Whole Blood Components in Samples Obtained from a Community-based Setting

Published on: November 30, 2015

Epigenetic and immune function profiles associated with posttraumatic stress disorder.

Monica Uddin¹, Allison E Aiello, Derek E Wildman

¹Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, MI 48109, USA.

Proceedings of the National Academy of Sciences of the United States of America

|May 5, 2010

Summary

Posttraumatic stress disorder (PTSD) is linked to epigenetic changes in immune genes. Trauma may reduce methylation of immune-related genes, affecting immune function and increasing susceptibility to infections like CMV.

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Biomarkers in an Animal Model for Revealing Neural, Hematologic, and Behavioral Correlates of PTSD

Biomarkers in an Animal Model for Revealing Neural, Hematologic, and Behavioral Correlates of PTSD

Published on: October 10, 2012

Related Experiment Videos

Last Updated: Jun 13, 2026

Rapid Fractionation and Isolation of Whole Blood Components in Samples Obtained from a Community-based Setting

Rapid Fractionation and Isolation of Whole Blood Components in Samples Obtained from a Community-based Setting

Published on: November 30, 2015

Biomarkers in an Animal Model for Revealing Neural, Hematologic, and Behavioral Correlates of PTSD

Biomarkers in an Animal Model for Revealing Neural, Hematologic, and Behavioral Correlates of PTSD

Published on: October 10, 2012

Area of Science:

Neuroscience
Immunology
Genetics

Background:

Posttraumatic stress disorder (PTSD) is a mental health condition with unclear biological mechanisms.
Immune system alterations are observed in individuals with PTSD.
Understanding these immune changes could reveal PTSD etiology and treatment targets.

Purpose of the Study:

To identify specific epigenetic profiles associated with immune system changes in PTSD.
To explore the relationship between methylation patterns, traumatic burden, and immune function in PTSD.
To investigate the role of cytomegalovirus (CMV) infection as a marker of immune response in PTSD.

Main Methods:

Methylation microarrays were used to analyze CpG sites in over 14,000 genes from blood samples of 100 individuals (23 with PTSD, 77 without).
Analysis focused on identifying differentially methylated genes and their association with PTSD status and traumatic burden.
Cytomegalovirus (CMV) serostatus and activity were assessed as a biomarker of immune response.

Main Results:

Immune system functions were significantly overrepresented among genes uniquely unmethylated in individuals with PTSD.
Genes with methylation levels negatively correlated with traumatic burden also showed strong immune function associations in PTSD.
Higher CMV activity was observed in individuals with PTSD, corroborating epigenetic findings.

Conclusions:

Peripheral epigenomic profiles and CMV activity are associated with PTSD.
A biological model suggests trauma reduces methylation of immune-related genes, altering immune function.
These findings offer insights into PTSD etiology and potential therapeutic strategies targeting immune pathways.