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We demonstrate here that the expression of the lysosomal enzyme acid sphingomyelinase (ASM; E.C.3.1.4.12) is induced during this process and is strongly elevated in differentiated THP-1 cells , as well as in differentiated human mononuclear phagocytes .
 THP-1 cells, acid sphingomyelinase, human mononuclear phagocytes, lysosomal enzyme
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:
 THP-1 cells, acid sphingomyelinase, human mononuclear phagocytes, lysosomal enzyme