6429
When compared with normal cells , the activation of NF-kappa B activity in SLE patients was significantly decreased in SLE , but not in RA , patients .
 NF-kappa B, normal cells
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:
 NF-kappa B, normal cells