14749
Tumor necrosis factor receptor expression and signal transduction in HIV-1 -infected cells .
 Tumor necrosis factor receptor, HIV-1 -infected cells, Tumor necrosis factor
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:
 Tumor necrosis factor receptor, HIV-1 -infected cells, Tumor necrosis factor