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To gain some insight into the maturation of M2-type leukemic cells , we studied the molecular mechanisms underlying monocytic differentiation induced by ATRA and VD in spontaneous M2 blast cells as well as in Kasumi-1 cells (an acute myeloid leukemia M2-type cell line ).
 ( cell line: Kasumi-1 cells, None) , ( cell line: M2 blast cells, None) , ( cell line: acute myeloid leukemia M2-type cell line, None) , ( cell type: M2-type leukemic 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: Kasumi-1 cells, None) , ( cell line: M2 blast cells, None) , ( cell line: acute myeloid leukemia M2-type cell line, None) , ( cell type: M2-type leukemic cells, None) 