5393
The active vitamin D3 metabolite 1,25-dihydroxycholecalciferol ( 1,25(OH)2D3 ) acts as an antiproliferative and differentiating agent for the monoblastoid cell line U937 and as an important immunologic mediator implicated particularly in the function of cells belonging to the monocyte/macrophage lineage .
 ( cell type: monocyte/macrophage lineage, None) , ( cell line: monoblastoid cell line U937, 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: monocyte/macrophage lineage, None) , ( cell line: monoblastoid cell line U937, None) 