1893
Therefore, the effects of PGE2 vary depending on the mode of T cell activation , and the IL-4 and IL-5 are regulated differently from other cytokines .
 IL-4, IL-5, PGE2, cytokines
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-4, IL-5, PGE2, cytokines