1387
Several models are suggested for how elevated NF-IL6 may participate in an autostimulatory loop involving HIV infection , macrophage activation , cytokine expression , and HIV replication .
 protein: cytokine; protein: NF-IL6
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 protein: cytokine; protein: NF-IL6