4861
r-hTBP-1 and rhu TNFR:Fc also decreased p24 antigen synthesized by U1 cells in response to other stimuli, including phytohemagglutinin ( PHA )-induced supernatant , granulocyte-macrophage colony-stimulating factor , interleukin-6 , and TNF .
 phytohemagglutinin ( PHA )-induced supernatant, rhu TNFR:Fc, r-hTBP-1, phytohemagglutinin, granulocyte-macrophage colony-stimulating factor, interleukin-6, U1 cells, TNF, PHA, p24 antigen
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:
 phytohemagglutinin ( PHA )-induced supernatant, rhu TNFR:Fc, r-hTBP-1, phytohemagglutinin, granulocyte-macrophage colony-stimulating factor, interleukin-6, U1 cells, TNF, PHA, p24 antigen