7184
However, CTLA-4 ligation did not appear to affect the CD28 -mediated stabilization of IL-2 mRNA .
 IL-2 mRNA, CTLA-4, CD28, IL-2
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-2 mRNA, CTLA-4, CD28, IL-2