Thiazolidinedione Improves Insulin Action in Monkeys
Author Information
Author(s): HEIDI K. ORTMEYER, NONI L. BODKIN, JOSEPH HANEY, SHINJI YOSHIOKA, HIROYOSHI HORIKOSHI, BARBARA C. HANSEN
Primary Institution: University of Maryland, Baltimore
Hypothesis
Can a thiazolidinedione improve insulin action on skeletal muscle glycogen synthase in insulin-resistant monkeys?
Conclusion
The thiazolidinedione R-102380 improves insulin action at the skeletal muscle by increasing glycogen synthase activity.
Supporting Evidence
- Insulin-stimulated glycogen synthase independent activity increased significantly after treatment.
- Total glycogen synthase activity nearly tripled under insulin stimulation after treatment.
- Individual monkeys showed varying degrees of improvement in insulin sensitivity.
Takeaway
A medication called R-102380 helps monkeys who have trouble using insulin to better use it by making a key enzyme work better.
Methodology
Four insulin-resistant obese monkeys were treated with R-102380 for 6 weeks, and their skeletal muscle glycogen synthase activity was measured before and after treatment.
Potential Biases
Individual differences in response to treatment may introduce variability in results.
Limitations
The study involved a small sample size of only four monkeys, which may limit the generalizability of the findings.
Participant Demographics
Four obese male insulin-resistant rhesus monkeys (Macaca mulatta).
Statistical Information
P-Value
p 0.005
Statistical Significance
p<0.05
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