13610
Anti-CD40 + IL-4 -mediated proliferation of PBMC and B cells was inhibited by RA in a dose-dependent manner , with maximal inhibition of 62% +/- 5% in PBMC and 55% +/- 4.4% in B cells by all-trans RA , and 58% +/- 6.7% and 51% +/- 4.7%, respectively by 13-cis RA .
 ( protein: IL-4, None) , ( protein: Anti-CD40, None) , ( cell type: B cells, None) , ( cell type: PBMC, None) , ( cell type: B cells, None) , ( cell type: PBMC, 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-4, None) , ( protein: Anti-CD40, None) , ( cell type: B cells, None) , ( cell type: PBMC, None) , ( cell type: B cells, None) , ( cell type: PBMC, None) 