9909
Helenalin inhibits NF-kappaB activation in response to four different stimuli in T-cells , B-cells and epithelial cells and abrogates kappaB -driven gene expression .
 ( cell type: B-cells, None) , ( cell type: T-cells, None) , ( protein: kappaB, None) , ( cell type: epithelial cells, None) , ( protein: NF-kappaB, 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: B-cells, None) , ( cell type: T-cells, None) , ( protein: kappaB, None) , ( cell type: epithelial cells, None) , ( protein: NF-kappaB, None) 