Effects of the insulin-sensitizing drug pioglitazone and lipopolysaccharide administration on insulin sensitivity in horses

Suagee, J.K., Corl, B.A., Wearn, J.G., Crisman, M.V., Hulver, M.W., Geor, R.J., and McCutcheon, L.J. (2011) Effects of the insulin-sensitizing drug pioglitazone and lipopolysaccharide administration on insulin sensitivity in horses. Journal of Veterinary Internal Medicine, 25 (2). pp. 356-64.

[img] PDF (Published Version) - Published Version
Restricted to Repository staff only

View at Publisher Website: http://dx.doi.org/10.1111/j.1939-1676.20...
 
15
2


Abstract

BACKGROUND

Obesity and insulin resistance increase the risk of laminitis in horses. Pioglitazone (PG) is an insulin-sensitizing drug used in humans that is absorbed after oral administration to horses.

HYPOTHESIS

PG treatment will increase insulin sensitivity and transcript abundance of glucose and lipid transporters in adipose and skeletal muscle tissues.

ANIMALS

Sixteen lean, healthy horses.

METHODS

Eight horses were administered PG (1 mg/kg bodyweight PO) for 12 days before induction of insulin resistance through IV administration of lipopolysaccharide (LPS). Treated and untreated controls (CN; n = 8) were subjected to testing of peripheral insulin sensitivity and biopsies of both subcutaneous (nuchal ligament) adipose tissue and skeletal muscle before and after treatment, and 24 hours after LPS administration.

RESULTS

PG treatment did not improve basal insulin sensitivity (CNs: 1.4 ± 0.3, PG-treated: 1.9 ± 1.3; P > .4) or mitigate LPS-induced insulin resistance (CNs: 0.4 ± 0.3, PG-treated: 0.4 ± 0.3); however, transcript abundance of glucose and lipid transporters was altered in both skeletal muscle and subcutaneous adipose tissue.

CONCLUSIONS AND CLINICAL IMPORTANCE

Either a higher dose or longer treatment period might be required for physiological effects to be observed. PG is a novel therapeutic agent requiring further investigation in horses in order to determine treatment efficacy.

Item ID: 40143
Item Type: Article (Research - C1)
ISSN: 1939-1676
Keywords: GLUT4, insulin receptor, skeletal muscle, subcutaneous adipose tissue
Funders: Center for Equine Research in Virginia
Date Deposited: 03 Nov 2015 23:25
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0707 Veterinary Sciences > 070706 Veterinary Medicine @ 60%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0707 Veterinary Sciences > 070705 Veterinary Immunology @ 40%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8303 Livestock Raising > 830306 Horses @ 100%
Downloads: Total: 2
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page