10390
IFN-gamma-primed lung fibroblasts costimulate T lymphocyte proliferation utilizing CD40 , but not the well-studied costimulatory molecules B7-1 and B7-2 .
 fibroblasts, B7-2, CD40, costimulatory molecules, IFN-gamma-primed lung fibroblasts, B7-1
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:
 fibroblasts, B7-2, CD40, costimulatory molecules, IFN-gamma-primed lung fibroblasts, B7-1