RAW 264.7 세포에서 silica에 의한 유리 라디칼 생성에 미치는 protein kinase 억제제의 영향 = Effect of Protein Kinase Inhibitor on Silica-induced Free Radical Generation in RAW 264.7 Cells

다국어 초록 (Multilingual Abstract)

To investigate involvement of protein kinase in reactive oxygen species (ROS) and peroxynitrite (PON) generation, we examined effect of protein kinase inhibitors on silica-induced ROS and PON generation in RAW 264.7 cells. Silica dose-dependently increased ROS and PON generation. Protein kinase C inhibitor, bisindolmaleimide and RO32-0432, slightly inhibited silica-induced ROS generation and significantly inhibited PON generation. Tyrosine kinase inhibitor, erbstatin and DHC, significantly inhibited silica-induced ROS generation but not PON generation. Calmodulin antagonist (W-7), calmodulin-dependent protein kinase Ⅱ inhibitor (KN-62) and mitogen-activated protein kinase inhibitor (PD98059) significantly inhibited silica-induced PON generation but not ROS generation. These results suggest that protein kinase C appears to be involved in both ROS and PON generation, tyrosine kinase in ROS generation, and calmodulin antagonist and mitogen-activated protein kinase in PON generation induced by silica in RAW 264.7 cells.