The role of endothelial insulin signaling in the regulation of glucose metabolism.
Level 5 - mechanism / opinion, no new human data
Narrative review describing preclinical mechanisms and mouse models
PubMed 23589150 · doi:10.1007/s11154-013-9242-z
What was done
This narrative review summarizes literature and the authors' previous experimental work in high-fat diet-fed mouse models investigating the role of endothelial cell insulin signaling and endothelial nitric oxide synthase (eNOS) phosphorylation in capillary recruitment and skeletal muscle glucose delivery.
What was found
The abstract reports no quantitative values or statistical metrics. It qualitatively describes that impaired endothelial insulin signaling and reduced insulin-induced eNOS phosphorylation diminish capillary recruitment and insulin delivery, reducing skeletal muscle glucose uptake in high-fat diet-fed mice. Re-establishing endothelial eNOS phosphorylation reversed these deficits and restored muscle glucose uptake.
Why it matters
The findings indicate that endothelial insulin action and microvascular perfusion are critical regulatory steps in muscle glucose uptake, framing the endothelium as a relevant contributor to peripheral insulin resistance.
Limits
The review relies on preclinical findings from mouse models without clinical trial data. The abstract provides no sample sizes, specific quantitative measurements, or systematic review methodology.
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