Biochemistry (New York) 2004-05-01

Expression of neutral glycosphingolipids in cytokine-stimulated human endothelial cells.

T Zemunik, A Markotić, A Marusić

Index: Biochemistry. (Mosc.) 69(5) , 513-9, (2004)

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Abstract

We compared immunohistochemical distribution of glycosphingolipids globotriosylceramide (GbOse(3)Cer) and globotetraosylceramide (GbOse(4)Cer) with that of E-selectin on human umbilical vein endothelial cells (HUVEC) stimulated with tumor necrosis factor (TNF)-alpha. HUVECs activated by TNF-alpha were characterized by the highest expression of E-selectin and greatest adhesion of HL-60 cells as well compared to stimulation with interleukin-1beta or lipopolysaccharide. HUVECs activated by TNF-alpha also stained intensely with globoside antibodies, especially with the GbOse(3)Cer-directed one, staining being redistributed in a concentration-dependent manner. These results indicate the possible role of GbOse(3)Cer and GbOse(4)Cer in immune effector mechanisms of endothelium such as adhesion.

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