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Finally, the biological relevance of the observation that T. pallidum lipoproteins -lipopeptides induce both NF-kappa B and cytokine production in monocytes was supported by the ability of the synthetic analogs to promote human immunodeficiency virus replication in chronically infected U1 monocytoid cells; these observations also suggest a potential mechanism whereby a syphilitic chancre can serve as a cofactor for human immunodeficiency virus transmission .
 T. pallidum lipoproteins, monocytes, cytokine, 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:
 T. pallidum lipoproteins, monocytes, cytokine, NF-kappa B