Possible dysmetabolic hyperferritinemia in hyperinsulinemic horses

Area of Science:

• Veterinary Medicine
• Equine Endocrinology
• Nutritional Biochemistry

Background:

• Hyperinsulinemia in horses is linked to metabolic syndrome and pituitary pars intermedia dysfunction, increasing laminitis risk.
• Elevated body iron levels are associated with insulin resistance in various species, a condition known as dysmetabolic hyperferritinemia in humans.
• Understanding iron's role in equine insulin resistance could offer new insights into metabolic diseases.

Purpose of the Study:

• To investigate the potential relationship between hyperinsulinemia and body iron levels in horses.
• To determine if iron indices correlate with insulin levels in horses with metabolic dysfunction.
• To explore parallels between equine and human dysmetabolic hyperferritinemia.

Main Methods:

• A retrospective review of case histories and laboratory results from 33 hyperinsulinemic horses was conducted.
• Serum iron, total iron binding capacity, and ferritin levels were analyzed for correlations with insulin indices.
• A secondary analysis compared insulin and ferritin levels between normal and hyperinsulinemic horses from a controlled trial.

Main Results:

• All analyzed horses with hyperinsulinemia had serum ferritin levels exceeding the reference range.
• No significant statistical associations were found between insulin indices and iron indices in the initial review.
• Significantly elevated ferritin levels were observed in hyperinsulinemic horses compared to controls in the secondary analysis.

Conclusions:

• The findings suggest a potential for iron overload in hyperinsulinemic horses.
• This warrants further research into the complex relationship between insulin and iron dysregulation in equine health.
• Iron metabolism may play a role in equine metabolic disorders, similar to other species.