Nitric Oxide Impairs Insulin Signaling in Rat Muscle
Author Information
Author(s): Simone Badal, Paul D. Brown, Dalip Ragoobirsingh
Primary Institution: The University of the West Indies, Kingston, Jamaica
Hypothesis
Does nitric oxide affect insulin-mediated signal transduction in rat skeletal muscle?
Conclusion
Nitric oxide significantly impairs insulin-mediated signal transduction in skeletal muscle, which may contribute to type 2 diabetes.
Supporting Evidence
- Nitric oxide donors reduced insulin receptor-β levels in skeletal myocytes.
- Tyrosine phosphorylation of IRS-1 was significantly decreased by nitric oxide.
- Serine phosphorylation of IRS-1 was significantly increased in the presence of nitric oxide.
Takeaway
Nitric oxide can make it harder for muscles to respond to insulin, which is important for controlling blood sugar.
Methodology
Rat skeletal myocytes were treated with nitric oxide donors and insulin, and the effects on insulin receptor and phosphorylation levels were measured.
Limitations
The study was conducted in vitro, and results may not fully translate to in vivo conditions.
Participant Demographics
6–8 week old Sprague-Dawley rats
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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