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Calorie hoarding and thrifting: Foxa3 finds a way
Xinran Ma1, Lingyan Xu1, Elisabetta Mueller1
1Genetic of Development and Disease Branch; National Institute of Diabetes and Digestive and Kidney Disease; National Institutes of Health ; Bethesda, MD, USA.
Adipocyte
|October 10, 2015
Summary
Forkhead box A3 (Foxa3) promotes obesity by enabling calorie hoarding. This gene expands visceral fat and reduces energy expenditure, contributing to metabolic disorders.
Area of Science:
- Metabolic research
- Obesity and diabetes research
- Molecular biology
Background:
- Obesity and diabetes are global health crises, driven by Western diets and sedentary lifestyles.
- Middle-aged individuals are susceptible to obesity and metabolic disorders due to age-related energy imbalances.
- Forkhead box A3 (Foxa3) is a protein family member implicated in metabolic regulation.
Purpose of the Study:
- To investigate the dual role of Forkhead box A3 (Foxa3) in metabolic pathology.
- To understand how Foxa3 contributes to obesity and associated disorders.
Main Methods:
- Analysis of recent data on Foxa3 function under high caloric conditions.
- Examination of Foxa3's impact on visceral and subcutaneous fat depots.
- Investigation of Foxa3's role in energy expenditure during aging.
Main Results:
- Foxa3 promotes selective expansion of visceral fat depots when caloric intake is high.
- Foxa3 suppresses energy expenditure in subcutaneous fat tissue as individuals age.
- Foxa3 functions as an energy "hoarding" mechanism.
Conclusions:
- Foxa3's "calorie hoarder" function is beneficial for survival with intermittent food access but pathological when calories are abundant.
- Understanding Foxa3's mechanism may offer new strategies to combat obesity and metabolic disorders.
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