A physiologist is studying the mechanisms of signal transduction involved in the pathogenesis of type 2 diabetes mellitus. Their research focuses on the intracellular signaling cascade that begins when insulin binds to the insulin receptor. In a series of experiments, they demonstrate that pre-treatment with tumor necrosis factor alpha (TNF-alph A) results in decreased insulin-mediated glucose uptake. This effect of TNF-alpha is most likely mediated through upregulation of which of the following processes?
A) Cyclic AMP hydrolyzation
B) Phosphatidylinositol cleavage
C) Proline residue hydroxylation
D) Serine residue phosphorylation
E) Stimulation of peroxisome proliferator-activated receptor
Correct Answer:
Verified
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