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- W2041778820 abstract "Pentoxifylline, a methylxanthine derivative, has been shown to inhibit T-cell-mediated cutaneous immune response by yet ill-understood mechanisms. Because cell adhesion to endothelial cells is a critical step in the initiation of such immune responses, we analyzed whether pentoxifylline would affect this process. To address this issue, adhesion of mouse T-lymphoma cells (TK-1) to mouse endothelioma cells (eEnd.2), either untreated or stimulated with tumor necrosis factor-alpha (TNF alpha), was studied. Pentoxifylline reduced the ability of endothelioma cells stimulated with different concentrations of TNF alpha, but not of untreated endothelioma cells, to bind T-lymphoma cells in dose-dependent (10(-5)-10(-3) M) fashion. Selective incubation of either endothelioma cells or T-lymphoma cells revealed that pentoxifylline acted exclusively on the endothelioma cells, even when added after TNF alpha stimulation. We questioned whether pentoxifylline suppressed T-lymphoma cell/endothelioma cell interactions by interfering with adhesion molecules expressed by either cell. However, as determined by flow cytometry, pentoxifylline did not alter TNF alpha-induced upregulation of intercellular adhesion molecule-1 or vascular cellular adhesion molecule-1 on endothelioma cells nor did it affect constitutive CD11a, CD18, or alpha 4-integrin expression on T-lymphoma cells, suggesting that rather than affecting quantitative expression of these adhesion molecules, pentoxifylline might modulate their avidity. We conclude that pentoxifylline in therapeutically achievable concentrations is a potent inhibitor of TNF alpha-induced T-lymphoma cell adhesion to endothelioma cells. This finding may account, at least in part, for the recently discovered anti-inflammatory action of pentoxifylline." @default.
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- W2041778820 date "1995-05-01" @default.
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- W2041778820 title "Pentoxifylline Inhibits Tumor Necrosis Factor-α (TNFα)-Induced T-Lymphoma Cell Adhesion to Endothelioma Cells" @default.
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- W2041778820 doi "https://doi.org/10.1111/1523-1747.ep12607010" @default.
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