8154
Activation of NF-kappaB is thought to be required for cytokine release from LPS-responsive cells , a critical step for endotoxic effects .
 NF-kappaB, LPS-responsive 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-kappaB, LPS-responsive cells