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Pyrrolidine dithiocarbamate , an inhibitor for NF-kappa B activation , markedly reduced PAF -stimulated kappa B binding activity as well as up-regulation of HB-EGF mRNA .
 NF-kappa B, HB-EGF mRNA, PAF, HB-EGF
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:
 NF-kappa B, HB-EGF mRNA, PAF, HB-EGF