6766
Effects of DEP- PAHs became significant at 7 hours and up to 48 hours time culture for MCP-1 , and up to 24 hours time culture for IL-8 and RANTES .
 IL-8, MCP-1, RANTES
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:
 IL-8, MCP-1, RANTES