8570
Exposing human umbilical vein endothelial cells ( HUVECs ) to anoxia/reoxygenation ( A/R ) results in an increase in polymorphonuclear leukocyte ( PMN ) adhesion to HUVECs .
 ( cell line: HUVECs, None) , ( cell line: HUVECs, None) , ( cell line: human umbilical vein endothelial cells, None) , ( cell type: PMN, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( cell line: HUVECs, None) , ( cell line: HUVECs, None) , ( cell line: human umbilical vein endothelial cells, None) , ( cell type: PMN, None) 