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In other neuroblastoma cell lines , such as SK-N-Be(2) , the lack of PMA induction of differentiation was correlated with the lack of NF-kappa B activation .
 NF-kappa B, neuroblastoma cell lines, SK-N-Be(2)
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, neuroblastoma cell lines, SK-N-Be(2)