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We show that increased transcription of the NF-IL6 gene is responsible, at least in part, for induction of NF-IL6 mRNA following activation of U937 promonocytic cells .
 NF-IL6, NF-IL6 mRNA, U937 promonocytic cells, NF-IL6, NF-IL6 gene
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-IL6, NF-IL6 mRNA, U937 promonocytic cells, NF-IL6, NF-IL6 gene