Significant improvement of insulin resistance of GK rats by treatment with sodium selenate.

Abstract

We studied the effect of sodium selenate on insulin resistance of Goto-Kakizaki (GK) rats. Rats were kept on standard laboratory chow with and without i.p. injections of sodium selenate (0.173 mg/kg body weight) for 14 days, and then subjected to the glucose clamp. The glucose clamp studies confirmed an improvement in insulin-stimulated glucose disposal in GK rats treated with sodium selenate, with respect to both insulin sensitivity and responsiveness. This amelioration of insulin resistance may be partly due to a direct effect of the sodium selenate on peripheral tissues. 2-Deoxyglucose uptake in sodium selenate-treated adipocytes was increased and the insulin findings suggest that sodium selenate increases not only insulin sensitivity but also insulin responsiveness. Sodium selenate also accelerated glucose incorporation into adipocytes of rats, suggesting that the action of sodium selenate is peripheral. Interestingly, sodium selenate at a high concentration (about 1 mmol/L) was more effective than insulin in enhancing glucose uptake. The present study suggested that sodium selenate treatment led to substantial improvement in peripheral insulin resistance.

• Authors: Yukisumi Iizuka, Yukari Ueda, Yasuyuki Yagi, Eiichi Sakurai
• Journal: Biological trace element research (Biol Trace Elem Res) Vol. 138 Issue 1-3 Pg. 265-71 (Dec 2010) ISSN: 1559-0720 [Electronic] United States
• PMID: 20177813 (Publication Type: Journal Article)

Chemical References

• Insulin
• Selenium Compounds
• Deoxyglucose
• Selenic Acid

Topics

• Adipocytes (drug effects, metabolism)
• Animals
• Biological Transport (drug effects)
• Cells, Cultured
• Deoxyglucose (metabolism)
• Diabetes Mellitus, Experimental (drug therapy)
• Glucose Clamp Technique
• Insulin (pharmacology)
• Insulin Resistance (physiology)
• Male
• Rats
• Rats, Wistar
• Selenic Acid
• Selenium Compounds (pharmacology, therapeutic use)