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 .
 cytokine mRNAs, Human monocytic cell line THP-1
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:
 cytokine mRNAs, Human monocytic cell line THP-1