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Induction of HIV-1 - LTR -driven transcription in THP-1 cells by superantigens was associated with the induction of nuclear factor-kappa B DNA-binding activity .
 LTR, superantigens, nuclear factor-kappa B, THP-1 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:
 LTR, superantigens, nuclear factor-kappa B, THP-1 cells