5978
Chemoattractants stimulate the expression of several inflammatory cytokines and chemokines , which in turn may activate their respective receptors and initiate an autocrine regulatory mechanism for persistent cytokine and chemokine gene expression .
 ( protein: chemokines, None) , ( protein: inflammatory cytokines, None) , ( protein: cytokine, None) , ( protein: chemokine, 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: chemokines, None) , ( protein: inflammatory cytokines, None) , ( protein: cytokine, None) , ( protein: chemokine, None) 