2520
IL-4 also suppressed the IL-2 -induced IL-6 mRNA expression .
 IL-6, IL-2, IL-4
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:
 IL-6, IL-2, IL-4