Abstract
In order to determine the possible effects of hemolysate on brain microvascular endothelial cells (BMECs), we examined the effects of hemolysate on the expression of intercellular adhesion molecule-1 (ICAM-1) and monocyte chemoattractant protein-1 (MCP-1), generation of reactive oxygen species (ROS), and NF-kappaB activation in rat BMECs. Hemolysate induced the expression of ICAM-1 and MCP-1 in endothelial cells. In addition, hemolysate stimulated nuclear translocation of the p65 subunit of NF-kappaB, and NF-kappaB DNA-binding activity in BMECs. Furthermore, hemolysate increased ROS generation, and hemolysate-induced ICAM-1and MCP-1 expression and NF-kappaB activation were abrogated in the presence of the direct scavenger of ROS. Taken together, our results indicate that hemolysate can induce inflammatory responses that increase expression of ICAM-1 and MCP-1, through ROS-dependent NF-kappaB activation in BMECs.
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