Q and A: about health and research

Post-traumatic stress disorder is usually described in psychological terms: intrusive memories, hypervigilance, disturbed sleep, anxiety and emotional numbness. But a growing body of research suggests that the effects of severe trauma may extend far beyond the mind. A recent study published in Nature Communications offers a striking view of what this might look like at the molecular level. Studying blood samples from World Trade Center responders, researchers found that people with PTSD showed a distinctive pattern of changes in proteins and metabolites—changes associated with inflammation, oxidative stress, altered energy metabolism and biological aging. The implication is important: PTSD may not simply coexist with poorer physical health. It may be associated with a systemic biological state that resembles accelerated aging. Looking at thousands of molecules at once The researchers examined 393 World Trade Center responders, including 232 people with PTSD and 161 trauma-exposed indi...

Research into the neurobiology of stress has transformed the understanding and treatment of Post-Traumatic Stress Disorder (PTSD). Studies in animals revealed that intense and prolonged stress does not simply affect emotions psychologically—it physically remodels the brain itself. These discoveries have led directly to new treatments that help restore emotional regulation and cognitive control in people suffering from trauma-related disorders. The Brain Under Stress When a person experiences danger or trauma, the brain rapidly releases stress chemicals known as catecholamines, particularly norepinephrine. In short bursts, this response is protective and necessary for survival. However, during chronic stress or repeated trauma, these neurochemical systems become overactivated. High levels of norepinephrine weaken the functioning of the prefrontal cortex (PFC), the region responsible for rational thinking, impulse control, concentration, and emotional regulation. At the same time, stress...