2643
These results suggest that Nef downmodulates LTR activation without significantly inhibiting the capacity of T cells to respond to immunological activations .
 T cells, Nef, LTR
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:
 T cells, Nef, LTR