Body Composition and Ectopic Lipid Changes With Biochemical Control of Acromegaly

Area of Science:

• Endocrinology
• Metabolic Disorders
• Body Composition Analysis

Background:

• Acromegaly results from excess growth hormone (GH) and insulin-like growth factor-1 (IGF-1).
• GH and IGF-1 significantly influence body composition and glucose metabolism.
• Understanding these effects is crucial for managing acromegaly patients.

Purpose of the Study:

• To compare body composition, glucose homeostasis, and gonadal steroids in active acromegaly patients versus controls.
• To assess changes in these parameters following biochemical control of acromegaly.

Main Methods:

• Cross-sectional study: 20 active acromegaly patients vs. 20 matched controls.
• Prospective study: 16 patients before and after treatment.
• Evaluated body composition (including ectopic lipids) via MRI/MRS, glucose homeostasis via OGTT, and gonadal steroids.

Main Results:

• Active acromegaly patients had lower intrahepatic lipids (IHL) and higher insulin levels/AUC than controls.
• Men with acromegaly had lower testosterone and estradiol.
• Post-treatment: improved insulin resistance, but increased IHL, abdominal fat, and decreased muscle mass.

Conclusions:

• Acromegaly is linked to insulin resistance and hyperinsulinemia, with lower IHL compared to controls.
• Biochemical control enhances insulin sensitivity but negatively impacts body composition, increasing adiposity and reducing muscle mass.