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These data indicate that IL-2 and IL-12 may have distinct signaling pathways leading to the induction of IFN-gamma and GM-CSF gene expression , and that the NK3.3 cell line may serve as a novel model for dissecting the biochemical and molecular events involved in these pathways.
 NK3.3 cell line, IL-2, IL-12, IFN-gamma, GM-CSF
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:
 NK3.3 cell line, IL-2, IL-12, IFN-gamma, GM-CSF