1773
NF-kappa B activation by TNF alpha was not correlated with cell differentiation or proliferation .
 TNF alpha, NF-kappa B
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:
 TNF alpha, NF-kappa B