10256
Furthermore, prolonged degradation of IkappaB-alpha and activation of NF-kappaB were demonstrated in THP-1 cells exposed to anti- E. chaffeensis serum and E. chaffeensis .
 THP-1 cells, IkappaB-alpha, NF-kappaB
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:
 THP-1 cells, IkappaB-alpha, NF-kappaB