1125
RESULTS: Both all-trans and 9-cis RA inhibited virus replication in HIV-1 IIIB-infected monocytoid cells , in the presence and absence of the co-stimulatory agent phorbol myristate acetate ( PMA ).
 ( cell line: HIV-1 IIIB-infected monocytoid 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:
 ( cell line: HIV-1 IIIB-infected monocytoid cells, None) 