Brown Adipose Tissue, Adiposity, and Metabolic Profile in Preschool Children

Area of Science:

• Metabolic Health
• Pediatric Obesity Research
• Adipose Tissue Biology

Background:

• Brown adipose tissue (BAT) inversely correlates with obesity in adults and older children.
• The role of BAT in adiposity and metabolic health in young children remains largely unknown.

Purpose of the Study:

• To investigate the influence of BAT on adiposity and metabolic profiles in Asian preschool children under thermoneutral conditions.
• To determine the relationship between BAT percentage and key metabolic and obesity indicators in young children.

Main Methods:

• Utilized water-fat magnetic resonance imaging to quantify BAT in the supraclavicular and axillary depots of 198 Singaporean preschool children (aged 4.5 years).
• Calculated percentage BAT (%BAT) and assessed abdominal adipose tissue volumes, ectopic fat (liver, soleus muscle), fatty liver index, and insulin sensitivity markers.

Main Results:

• A 1% increase in %BAT was associated with lower body mass index (BMI) and reduced abdominal adipose tissue.
• Higher %BAT correlated with decreased ectopic fat in the liver and soleus muscle, and a lower fatty liver index.
• Observed significant ethnic and sex differences in the associations between %BAT and metabolic parameters.

Conclusions:

• Increased %BAT in preschool children is linked to a more favorable metabolic profile, suggesting a protective role against obesity and related disorders.
• The findings highlight potential variations in BAT's protective effects across different ethnic and sex groups.
• BAT may be a significant factor in the early pathophysiology of obesity and metabolic diseases in children.