5701
Human monocyte IL-1 receptor antagonist (IL-1ra) messenger ribonucleic acid (mRNA) expression and protein secretion are inhibited by dexamethasone .
 IL-1, Human monocyte IL-1 receptor antagonist, Human monocyte IL-1 receptor antagonist (IL-1ra) messenger ribonucleic acid
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-1, Human monocyte IL-1 receptor antagonist, Human monocyte IL-1 receptor antagonist (IL-1ra) messenger ribonucleic acid