12755
The induction of IgE switching in B cells requires several signals given by cytokines and cell contact-delivered signals.
 IgE, B cells, 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:
 IgE, B cells, cytokines