2380
Anti- CD28 -stimulated T cells produced significant amounts of IL-8 ; additionally, costimulation with anti-CD3 and anti- CD28 Abs resulted in a synergistic induction of IL-8 secretion .
 anti- CD28 Abs, CD28, anti-CD3, Anti- CD28 -stimulated T cells, CD28, IL-8, IL-8
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:
 anti- CD28 Abs, CD28, anti-CD3, Anti- CD28 -stimulated T cells, CD28, IL-8, IL-8