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- W2527888403 abstract "Background and aims: Diabetic patients have an increased risk of late stent thrombosis formation and restenosis, after angioplasty. It is hypothesized that delayed re-endothelization is a major underlying problem for late-stent thrombosis and also that rapid re-endothelization is essential for preventing restenosis. Exendin-4 is a stable GLP-1 receptor agonist, which is applied in clinical treatment of diabetes. Beside its insulinotropic action, it may also exert direct beneficial effects on endothelial function. We previously reported that exendin-4 is able to activate the GLP-1 receptor on human coronary artery endothelial cells, leading to increased cell proliferation and decreased apoptosis. Therefore, our aim was to study if exendin-4 can influence endothelialization and decrease neointima formation after vascular injury. Materials and Methods: Balloon injury of the left common carotid artery (LCCA) was performed on Sprague-Dawley rats. Rats were randomized into two groups and treated for four weeks with exendin-4 (1 nmol/day) or saline. Intimal hyperplasia and endothelialization was monitored non-invasively by high frequency ultrasound and upon sacrifice with Evans blue, respectively. The LCCA was then sectioned for subsequent morphometric and immunohistochemical analyses. To further investigate if and how smooth muscle cells (SMCs) are directly affected by exendin-4 treatment, we studied proliferation and apoptosis of SMCs in vitro . Results and conclusions: Our findings show that exendin-4 selectively reduces SMC proliferation and intimal hyperplasia through activation of cAMP signaling and endothelial nitric oxide synthase without influencing re-endothelialization. Treatment with exendin-4 did however improve arterial wall elasticity. Together, these effects of exendin-4 are highly desirable and may lead to improved outcome for patients undergoing vascular interventions" @default.
- W2527888403 created "2016-10-14" @default.
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- W2527888403 date "2014-05-01" @default.
- W2527888403 modified "2023-10-02" @default.
- W2527888403 title "Abstract 515: Effects of the Glucagon-Like Peptide-1 Analog Exendin-4 on Reendothelialization and Intimal Hyperplasia Formation in an Animal Model of Vascular Injury" @default.
- W2527888403 doi "https://doi.org/10.1161/atvb.34.suppl_1.515" @default.
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