Adiposity, Inflammation, and Working Memory: Evidence for a Vicious Cycle.

Area of Science:

• Childhood obesity and cognitive function
• Inflammation and metabolic health
• Longitudinal studies in developmental psychology

Background:

• Overweight and obesity are significant global health concerns linked to preventable deaths.
• Excess weight can negatively impact health through inflammation and cognitive changes.
• A proposed vicious cycle suggests obesity worsens inflammation, impairing cognitive processes like working memory, hindering self-regulation and weight management.

Purpose of the Study:

• To longitudinally investigate the dynamic relationship between fat mass, C-reactive protein (CRP), and working memory in children.
• To examine if obesity potentiates inflammation, which in turn affects working memory.
• To determine if impaired working memory leads to increased adiposity and inflammation.

Main Methods:

• Utilized data from the Avon Longitudinal Study of Parents and Children (ALSPAC) in the UK, including 8,536 children.
• Assessed adiposity using dual-emission X-ray absorptiometry (DEXA) at ages 9 and 15.5 years.
• Measured serum C-reactive protein (CRP) for inflammatory activity and working memory at ages 9, 10, and 15.5 years.

Main Results:

• Higher fat mass at age 9 predicted poorer working memory at age 10, with CRP mediating this effect.
• Poorer working memory at age 10 predicted increased fat mass and CRP levels at age 15.5.
• The association between working memory and subsequent CRP was partially mediated by fat mass.

Conclusions:

• Findings suggest a reciprocal, mutually reinforcing cycle between adiposity, inflammatory activity, and working memory in children.
• This cycle may contribute to the persistence of obesity and associated health issues.
• Understanding these dynamics is crucial for developing effective interventions for childhood obesity.