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- W2016358947 abstract "Lipoprotein lipase (LPL), the major enzyme for hydrolysis of circulating triglyceride-rich lipoproteins, is bound to the luminal surface of capillary endothelial cells. Products of LPL-mediated lipolysis, such as free fatty acids (FFA) and lipoprotein-remnants, can affect endothelial function and gene expression, and hence vascular homeostasis. In this study we tried to identify lipolysis-induced mRNAs in porcine aortic endothelial cells (ECAP) using a cDNA subtraction method. cDNA obtained from ECAP incubated with LPL and VLDL was subtracted from cDNA from cells cultured under control conditions. Analysis of the identified sequences revealed an upregulation of several mRNAs with adenine and uracil-rich elements (ARE) in their 3′-untranslated regions, such as IL-8, ESM-1 and VCAM-1. HuR, a ubiquitously expressed RNA-binding protein, is known to stabilize ARE-harboring mRNAs. Therefore, we investigated whether HuR is involved in this process and found that lipolysis induced an increased polysomal localization of HuR, which is typical for its activation pathway. In addition, the mRNAs for GM-CSF and TNF-α – established ARE-containing targets for HuR-mediated regulation – were upregulated by LPL-mediated lipolysis in ECAP. Differential expression of AU-rich mRNAs in response to LPL-mediated lipolysis might have an impact on physiological processes regulating lipid metabolism or pathophysiological processes promoting endothelial dysfunction and atherogenesis." @default.
- W2016358947 created "2016-06-24" @default.
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- W2016358947 date "2006-12-01" @default.
- W2016358947 modified "2023-09-23" @default.
- W2016358947 title "LPL-mediated lipolysis of VLDL induces an upregulation of AU-rich mRNAs and an activation of HuR in endothelial cells" @default.
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- W2016358947 doi "https://doi.org/10.1016/j.atherosclerosis.2006.01.007" @default.
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