Insulin sensitivity in normal and diabetic cats.

Area of Science:

• Veterinary Medicine
• Endocrinology
• Metabolic Research

Background:

• In vivo insulin sensitivity (S(I)) is crucial for metabolic health.
• Estimating S(I) is typically done using minimal model analysis of intravenous glucose tolerance tests.
• The insulin-modified FSIVGTT allows for S(I) measurement in diabetic individuals.

Purpose of the Study:

• To establish and compare reference values for insulin sensitivity in clinically normal and diabetic cats.
• To investigate the presence and extent of insulin resistance in feline diabetes mellitus.

Main Methods:

• Utilized the insulin-modified frequently sampled intravenous glucose tolerance test (FSIVGTT).
• Applied minimal model analysis to derive insulin sensitivity (S(I)) and glucose effectiveness.
• Studied a cohort of 10 clinically normal cats and 5 diabetic cats.

Main Results:

• Diabetic cats demonstrated significantly lower insulin sensitivity than clinically normal cats (P<0.05).
• Mean insulin sensitivity in diabetic cats was approximately six times lower than in normal cats (0.58x10(-4)/min/microU/ml vs. 3.22x10(-4)/min/microU/ml).
• Mean glucose effectiveness was also reduced in diabetic cats (0.014/min) compared to normal cats (0.030/min).

Conclusions:

• Insulin resistance is a characteristic feature of feline diabetes mellitus.
• Diabetic cats show a relative decrease in insulin sensitivity comparable to humans with type 2 diabetes.
• The study provides reference values for insulin sensitivity in cats, aiding in the understanding of feline metabolic disease.