8920
IFN-alpha also sensitized T cells to IL-2 -induced proliferation , further suggesting that IFN-alpha may be involved in the regulation of T-cell mitogenesis .
 ( protein: IL-2, None) , ( protein: IFN-alpha, None) , ( protein: IFN-alpha, None) , ( cell line: sensitized T 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:
 ( protein: IL-2, None) , ( protein: IFN-alpha, None) , ( protein: IFN-alpha, None) , ( cell line: sensitized T cells, None) 