ArticleLab on a chip2025
Understanding the role of vascular stretch on modulation of VWF and ANGPT-2 in continuous flow left ventricular assist device (CF-VAD) patients.
Article in Lab on a chip, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Non-surgical bleeding is a common complication in patients on continuous flow left ventricular assist device (CF-VAD) support. This study investigates how the transition from cyclic to constant stretch following CF-VAD implantation affects endothelial biosynthesis and release of Von Willebrand factor (VWF) and angiopoietin-2 (ANGPT-2), two molecules that play an essential role in the development of non-surgical bleeding. Human aortic endothelial and umbilical vein endothelial cells (HAECs and HUVECs) were cultured within a uniaxial stretch device that mimics stretch associated with both normal pulsatile and CF-VAD conditions. Following 72 hours of stretch, transcriptional regulation, intracellular accumulation, and secretion of VWF and ANGPT-2 were evaluated using molecular expression profiling and immunofluorescence microscopy. Constant stretch associated with CF-VADs upregulates transcriptional levels of VWF and ANGPT-2 in HAECs and HUVECs compared to physiological cyclic stretch (
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