High amount of visceral fat mass is associated with multiple metabolic changes in offspring of type 2 diabetic...

Area of Science:

• Metabolic Health
• Obesity Research
• Endocrinology

Background:

• Offspring of individuals with type 2 diabetes are at increased risk for metabolic dysfunction.
• Obesity is a major risk factor for metabolic complications.
• Differentiating the roles of total body fat mass (TFM) and intra-abdominal fat mass (IAFM) is crucial for understanding metabolic risk.

Purpose of the Study:

• To determine the independent contributions of TFM and IAFM to metabolic abnormalities in nondiabetic offspring of parents with type 2 diabetes.
• To assess how fat distribution, specifically IAFM, influences insulin sensitivity, insulin secretion, and energy expenditure.

Main Methods:

• Cross-sectional study of 129 nondiabetic offspring (mean age 35.7 years).
• Assessment of TFM via bioelectrical impedance and IAFM via CT scans.
• Measurement of insulin sensitivity (euglycemic hyperinsulinemic clamp), insulin secretion (IVGTT), energy expenditure (indirect calorimetry), C-reactive protein (CRP), and adiponectin levels.

Main Results:

• High IAFM was independently associated with insulin resistance, impaired glucose disposal (oxidative and nonoxidative), increased lipid oxidation, and reduced energy expenditure.
• Elevated IAFM correlated with lower adiponectin and higher CRP levels.
• These metabolic alterations occurred irrespective of overall TFM.

Conclusions:

• Metabolic consequences of obesity are primarily driven by high IAFM, not just total body fat.
• Individuals with normal weight but high IAFM exhibit significant metabolic abnormalities.
• Targeting IAFM may be a key strategy for preventing metabolic disease in at-risk populations.