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- W2043946210 abstract "Foam cells are a pathological feature present at all stages of atherosclerosis. Foam cells develop from monocytes that enter the nascent atheroma and subsequently ingest modified low density lipoproteins (LDL). The regulation of this process has previously been studied in vitro using cultured macrophage fed modified LDL. We used our existing in vitro model of transendothelial migration (TEM) to study this process in a more physiologically relevant setting. In our model, monocytes undergo TEM across a primary endothelial monolayer into an underlying three-dimensional collagen matrix in the presence of 20% human serum. Foam cells were detected by Oil Red O staining for intracellular lipid droplets. We demonstrate that sub-endothelial monocytes can develop into foam cells within 48 h of TEM across TNF-α activated endothelium, in the absence of additional lipids. Our data indicate a role for both monocyte-endothelial interactions and soluble factors in the regulation of foam cell development, including oxidation of LDL in situ from lipid present in culture medium following TNF-α stimulation of the endothelial cells. Our study provides a simple model for investigating foam cell development in vitro that mimics cell migration in vivo, and demonstrates the critical role of inflammation in regulating early atherogenic events." @default.
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- W2043946210 date "2012-10-01" @default.
- W2043946210 modified "2023-10-18" @default.
- W2043946210 title "Endothelial cell activation promotes foam cell formation by monocytes following transendothelial migration in an in vitro model" @default.
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- W2043946210 doi "https://doi.org/10.1016/j.yexmp.2012.03.014" @default.
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