OnDemand: April 2024 Grand Rounds - Weighing the Burden of Trauma: Unraveling How Childhood Adversities Amplify the Risk of Obesity-Unraveling How Childhood Adversities Amplify the Risk of Obesity PDF

Unraveling How Childhood Adversities Amplify the Risk of Obesity PDF

Pdf Summary

This grand rounds handout reviews obesity disparities in the U.S., with a focus on Hispanics/Latinos and especially communities like San Bernardino County. Obesity has major economic costs and disproportionately affects Mexican Americans compared with non-Hispanic Whites. The presentation argues that obesity is not only a matter of diet and exercise, but also reflects complex interactions among genetics, environment, psychology, and sociocultural stressors.<br /><br />A major emphasis is the role of childhood adversity. Hispanics/Latinos experience high rates of adverse childhood experiences (ACEs), including abuse, household dysfunction, discrimination, poverty-related hardships, and unsafe environments. These early stressors are strongly linked to later-life obesity and unhealthy eating patterns such as emotional eating, overeating, and binge eating.<br /><br />The handout highlights the brain-gut-microbiome system as a key mechanism connecting early-life stress to obesogenic behaviors. Childhood adversity can alter gut microbiome composition and diversity, leading to inflammation and changes in brain function that may promote maladaptive eating. The author’s laboratory research further shows that adolescence is a vulnerable period: exposure to high-fat “obesogenic” diets during this time can reduce hippocampal volume, disrupt brain circuit maturation, increase stress sensitivity, raise oxidative stress and neuroinflammation, and alter gut microbiota. Combined obesogenic diet and chronic stress may act synergistically to worsen inflammatory microglial responses and epigenetic regulation of genes such as Fkbp5.<br /><br />Overall, the handout suggests that early exposure to obesogenic environments and psychosocial stress may shape lifelong stress responses, psychiatric risk, and obesity-related health outcomes. Understanding these mechanisms may help identify biomarkers and support more effective prevention and treatment strategies for vulnerable populations.

Keywords

obesity disparities

Hispanics/Latinos

Mexican Americans

childhood adversity

adverse childhood experiences

brain-gut-microbiome axis

emotional eating

adolescence

obesogenic diet

chronic stress