12589
Porcine aortic endothelial cells ( PAEC ) were incubated for 1 hr 30 min or 5 hr with 10% homologous porcine serum (control) or 10% xenogeneic human serum and then perfused with total human leukocytes in a parallel plate flow chamber under laminar flow (1.5 dynes/cm2).
 ( cell line: PAEC, None) , ( cell type: human leukocytes, None) , ( cell line: Porcine aortic endothelial cells, 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: PAEC, None) , ( cell type: human leukocytes, None) , ( cell line: Porcine aortic endothelial cells, None) 