4573
To investigate the molecular mechanism of the inhibitory effect on transcriptional or post-transcriptional regulation of IL-6 gene expression by IL-4 and IL-10 , we studied IL-6 production, expression level of IL-6 mRNA , IL-6 promoter activity , transcriptional activity of NF-kappaB and NF- IL-6 , and IL-6 mRNA stability in human monocytic cell lines , THP-1 and U937 , stimulated by PMA and LPS in the absence or the presence of IL-4 or IL-10 .
 IL-6 mRNA, IL-10, NF-kappaB, human monocytic cell lines, IL-6, IL-6 gene, IL-6, IL-6, IL-4, IL-6, IL-4, NF- IL-6, U937, IL-6, IL-6 mRNA, THP-1, IL-10
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:
 IL-6 mRNA, IL-10, NF-kappaB, human monocytic cell lines, IL-6, IL-6 gene, IL-6, IL-6, IL-4, IL-6, IL-4, NF- IL-6, U937, IL-6, IL-6 mRNA, THP-1, IL-10