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In order to elucidate possible mechanisms underlying endothelial cell activation by xenogeneic serum , we focussed on transcription factor NF-kappa B , a central regulator for the induction of different genes, including adhesive molecules and chemoattractants .
 NF-kappa B, chemoattractants, transcription factor NF-kappa B, endothelial cell, adhesive molecules
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, chemoattractants, transcription factor NF-kappa B, endothelial cell, adhesive molecules