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- W2773048598 abstract "Background and aims Diabetes is associated with accelerated arterial intimal thickening that contributes to the increased cardiovascular disease seen in this population. In healthy arteries, intimal thickening is inhibited by elevated levels of the cyclin-dependent kinase inhibitor, p27Kip1, and intimal thickening is promoted by activation of the mammalian Target of Rapamycin to promote degradation of p27Kip1 protein. Recently, we reported that two microRNAs, miR-221 and -222, which promote intimal thickening via down-regulation of mRNA encoding p27Kip1, are elevated in the arteries of diabetic patients. To determine if these miRNAs are critical to the increased intimal thickening under diabetic conditions, we examined the regulation of p27Kip1in a mouse model of diabetes. Methods Comparisons of p27Kip1 signaling in NONcNZO10 mice fed a diabetogenic versus control diet were performed using immunochemistry and real-time PCR. Results Vascular smooth muscle cells and arteries of diabetic mice exhibited decreased levels of p27Kip1 that derived from destabilization of p27Kip1 mRNA in an extracellular signal response kinase-1/2 (ERK-1/2) dependent manner. The activity of ERK-1/2 is increased in the arteries of diabetic mice and promotes an increase in miR-221 and -222. Inhibition of miR-221 and -222 restores normal levels of p27Kip1 mRNA and protein in the arteries of diabetic mice and reduces intimal thickening following wire injury. Conclusions These data suggest diabetes is accompanied by increases in arterial miR-221 and -222 expression that promotes intimal thickening. Inhibition of the increased miR-221 and -222 may be efficacious in the prevention of the cardiovascular complications of diabetes." @default.
- W2773048598 created "2017-12-22" @default.
- W2773048598 creator A5021273675 @default.
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- W2773048598 date "2018-02-01" @default.
- W2773048598 modified "2023-10-14" @default.
- W2773048598 title "Upregulation of miR-221 and -222 in response to increased extracellular signal-regulated kinases 1/2 activity exacerbates neointimal hyperplasia in diabetes mellitus" @default.
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- W2773048598 doi "https://doi.org/10.1016/j.atherosclerosis.2017.12.016" @default.
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