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- W2024994085 abstract "Vascular cell adhesion molecule-1 (VCAM-1) and intercellular adhesion molecule-1 (ICAM-1) are upregulated in vascular endothelial and smooth muscle cells by cytokines produced at sites of inflammation. The cytokine profile for induction of VCAM-1, however, is different for the two cell types. Tumor necrosis factor-alpha (TNF-alpha) induced both VCAM-1 and ICAM-1 expression in human umbilical vein endothelial cells (HUVECs; ED50 approximately 300 and 30 U/ml, respectively). TNF-alpha and interleukin-1beta (IL-1beta) stimulated cell surface ICAM-1 expression, but not VCAM-1 expression, in human aortic smooth muscle cells (HASMCs). Conversely, IL-4 was a potent VCAM-1 inducer in HASMCs (ED50 approximately 100 pg/ml) but did not induce ICAM-1 expression. Nuclear extracts from IL-4-treated cells were compared with untreated cells for relative nuclear factor-kappa B (NF-kappaB) levels by using an electrophoretic mobility shift assay and surface plasmon resonance techniques. No significant increase in nuclear NF-kappaB DNA binding activity was detected in IL-4-treated HASMCs by either method of analysis. IL-1beta and TNF-alpha stimulated nuclear NF-kappaB levels by about fourfold and fivefold, respectively, in HASMCs. The antioxidant pyrrolidine dithiocarbamate (PDTC) similarly inhibited VCAM-1 upregulation in HASMCs incubated with IL-4 and in HUVECs incubated with TNF-alpha (IC50s of 25 and 40 microM, respectively). These data suggest that a significant increase in nuclear NF-kappaB levels is not necessary or sufficient for VCAM-1 upregulation in HASMCs and does not determine the relative sensitivity to inhibition of gene expression by PDTC." @default.
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- W2024994085 date "1999-09-01" @default.
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- W2024994085 title "Induction of vascular cell adhesion molecule-1 expression by IL-4 in human aortic smooth muscle cells is not associated with increased nuclear NF-?B levels" @default.
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- W2024994085 doi "https://doi.org/10.1002/(sici)1097-4652(199909)180:3<381::aid-jcp9>3.0.co;2-f" @default.
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