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Interleukin-4 ( IL-4 ) is an immunomodulatory cytokine secreted by activated T lymphocytes , basophils , and mast cells .
 ( cell type: mast cells, None) , ( cell type: T lymphocytes, None) , ( cell type: basophils, None) , ( protein: IL-4, None) , ( protein: Interleukin-4, 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 type: mast cells, None) , ( cell type: T lymphocytes, None) , ( cell type: basophils, None) , ( protein: IL-4, None) , ( protein: Interleukin-4, None) 