ArticleAmerican journal of physiology. Heart and circulatory physiology2010
Direct-contact co-culture between smooth muscle and endothelial cells inhibits TNF-alpha-mediated endothelial cell activation.
Article in American journal of physiology. Heart and circulatory physiology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.
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Who cites it
30 citing papers in PubMed, 44 citations in OpenAlex.
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
Abstract
We used a direct-contact endothelial cell-smooth muscle cell (EC-SMC) co-culture to examine whether quiescent SMCs regulate the EC inflammatory response to tumor necrosis factor (TNF)-alpha. ECs were cultured under static and physiological flow conditions. Compared with TNF-alpha-treated ECs in monoculture, TNF-alpha-treated ECs in co-culture had less NF-kappaB nuclear translocation; less intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), and E-selectin surface protein expression; no change in TNF receptor expression, but greater Kruppel-like factor 2 (KLF2) gene expression. After flow preconditioning for 24 h at 15 dyne/cm(2), and exposure of ECs to flow and TNF-alpha for 4.5 h, ECs in co-culture had less ICAM-1, VCAM-1, and E-selectin surface protein expression. Exposure to flow greatly increased KLF2 gene expression levels in both EC cultures; as a result, ECs in co-culture and monoculture had similar levels of post-flow KLF2 gene expression. The reduced levels of TNF-alpha-induced adhesion molecule expression in co-culture required the presence of quiescent SMCs; adhesion to decellularized extracellular matrix (ECM) or co-culture with fibroblasts produced only a modest reduction in EC adhesion molecule expression. Furthermore, co-culture of quiescent SMCs and ECs on the opposite side of a 10-microm-thick porous membrane did not alter the TNF-alpha-mediated ICAM-1 surface protein expression. Although the ECM produced by SMCs plays some role in reducing TNF-alpha-mediated inflammation, these results suggest that the direct contact between ECs and quiescent SMCs is required to inhibit TNF-alpha-mediated activation.
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