Sustained caloric restriction potentiates insulin action by activating prostacyclin synthase
Authors' conclusion
CR enhances insulin sensitivity by promoting PTGIS expression and stimulating the TUG cleavage pathway, leading to increased GLUT4 translocation to the cell surface and decreased GLUT4 carbonylation. These findings shed light on the complex molecular mechanisms through which CR favorably impacts insulin sensitivity and metabolic health.
Study context
- Population
- Participants in the CALERIE 2 study (adipose tissue)
- Comparison
- Caloric restriction (CR) vs baseline and ad libitum
- Outcome
- Molecular mechanisms of CR on insulin action
Methodological detailsproteomic profiling of adipose tissue, biochemical and cell-specific physiological approaches
- Proteomic profiling of adipose tissue
- Biochemical and cell-specific physiological approaches
Main finding
As reported in the abstract
- CR upregulates prostacyclin synthase (PTGIS) in adipose tissue, an enzyme producing PGI2
- PGI2 improves insulin's ability to stimulate the TUG cleavage pathway, essential for glucose uptake regulation
- Iloprost, a PGI2 analog, increased insulin receptor density on cell membranes, increasing glucose uptake in human adipocytes
- CR reduces carbonylation of GLUT4, a modification detrimental to GLUT4 function
Original publication
Sustained caloric restriction potentiates insulin action by activating prostacyclin synthase. Obesity (Silver Spring). Published 17 October 2024. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →