2101
Superantigens also increased viral protein secretion from the granulocyte-macrophage colony-stimulating factor -pretreated chronically infected human monocytic cell line U1 .
 ( cell line: granulocyte-macrophage colony-stimulating factor -pretreated chronically infected human monocytic cell line U1, None) , ( protein: granulocyte-macrophage colony-stimulating factor, None) , ( protein: Superantigens, 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: granulocyte-macrophage colony-stimulating factor -pretreated chronically infected human monocytic cell line U1, None) , ( protein: granulocyte-macrophage colony-stimulating factor, None) , ( protein: Superantigens, None) 