7823
CD40 expression could be enhanced in CD40 -positive MM by stimulation with IFN-gamma and tumor necrosis factor-alpha but not by interleukin (IL)-1beta or CD40 triggering .
 tumor necrosis factor-alpha, CD40, CD40, IFN-gamma, interleukin (IL)-1beta, CD40
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:
 tumor necrosis factor-alpha, CD40, CD40, IFN-gamma, interleukin (IL)-1beta, CD40