13618
Taken together, this study shows that RA inhibits IgE production of anti-CD40 + IL-4 -stimulated B cells in vitro.
 ( protein: IgE, None) , ( protein: anti-CD40, None) , ( protein: IL-4, None) , ( cell line: anti-CD40 + IL-4 -stimulated B cells, 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: IgE, None) , ( protein: anti-CD40, None) , ( protein: IL-4, None) , ( cell line: anti-CD40 + IL-4 -stimulated B cells, None) 