[Insulin receptor function in subjects with above-normal body weight]

Area of Science:

• Endocrinology
• Metabolic Research
• Obesity Studies

Background:

• Obesity is a growing health concern linked to metabolic dysfunction.
• Insulin resistance is a key factor in the development of type 2 diabetes.
• Understanding insulin receptor dynamics in obesity is crucial for risk assessment.

Purpose of the Study:

• To investigate insulin receptor binding ability in individuals with varying degrees of obesity.
• To explore the relationship between obesity severity and insulin receptor number and affinity.
• To assess the potential risk of developing diabetes mellitus in obese individuals.

Main Methods:

• Studied 26 individuals (15 women, 11 men) with above-normal body mass.
• Classified participants into obesity degree groups (I-II and III-IV).
• Assessed insulin receptor number (total and high affinity) and binding affinity.

Main Results:

• Obesity degree I-II showed reduced insulin receptors but increased affinity as a compensatory mechanism.
• Obesity degree III-IV exhibited significantly reduced insulin receptors with normal affinity compared to controls.
• Receptor changes in severe obesity resemble those in newly diagnosed non-insulin dependent diabetes mellitus.

Conclusions:

• Mild obesity (I-II) may compensate for reduced insulin receptors through increased affinity.
• Severe obesity (III-IV) presents insulin receptor alterations similar to early diabetes.
• Individuals with severe obesity are at potential risk for developing diabetes mellitus.