12082
During the differentiation process of cells from the monocytic cell line THP-1 we observed a transient transcriptional upregulation of a human carboxylesterase analyzed by means of Northern blots .
 ( protein: human carboxylesterase, None) , ( cell line: monocytic cell line THP-1, 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:
 ( protein: human carboxylesterase, None) , ( cell line: monocytic cell line THP-1, None) 