991
Dexamethasone produced a rapid and sustained increase in glucocorticoid response element binding and a concomitant 40-50% decrease in AP-1 , NF kappa B , and CREB DNA binding that was blocked by combined dexamethasone and cytokine or PMA treatment .
 ( protein: cytokine, None) , ( DNA: glucocorticoid response element, 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: cytokine, None) , ( DNA: glucocorticoid response element, None) 