7684
In 16HBE human bronchial epithelial cells , IL-8 expression is regulated predominantly by NF-kappaB , and PG490 but not cyclosporin A can completely inhibit expression of IL-8 .
 ( protein: IL-8, None) , ( protein: NF-kappaB, None) , ( cell type: 16HBE human bronchial epithelial cells, None) , ( protein: IL-8, 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-8, None) , ( protein: NF-kappaB, None) , ( cell type: 16HBE human bronchial epithelial cells, None) , ( protein: IL-8, None) 