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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 ).
 Kasumi-1 cells, M2 blast cells, acute myeloid leukemia M2-type cell line, M2-type leukemic cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 Kasumi-1 cells, M2 blast cells, acute myeloid leukemia M2-type cell line, M2-type leukemic cells