8744
In the present study , we sought to investigate whether constitutive NF - kappaB activity in chronically HIV - 1 - infected promonocytic U937 ( U9 - IIIB ) and myeloblastic PLB - 985 ( PLB - IIIB ) cells affects apoptotic signaling .
 NF - kappaB
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 NF - kappaB