5703
We found that cortisol incubation induced a decrease in IL-1ra mRNA expression and a significant inhibition of IL-1ra protein secretion in cell cultures of human peripheral monocytes stimulated with the bacterial endotoxin lipopolysaccharide ( LPS ).
 IL-1ra mRNA, human peripheral monocytes, IL-1ra protein, IL-1ra
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-1ra mRNA, human peripheral monocytes, IL-1ra protein, IL-1ra