13580
Both T cell lines could be anergized by the autopresentation of native peptide since anergy was induced in cultures lacking fresh antigen-presenting cells .
 antigen-presenting cells, T cell lines
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:
 antigen-presenting cells, T cell lines