10251
Human monocytic cell line THP-1 was treated with E. chaffeensis which had been preincubated with human anti- E. chaffeensis serum for 2 h, and the levels of cytokine mRNAs were evaluated by competitive reverse transcription-PCR .
 ( RNA: cytokine mRNAs, None) , ( cell line: Human 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:
 ( RNA: cytokine mRNAs, None) , ( cell line: Human monocytic cell line THP-1, None) 