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In our present study , QD705 - COOH and QD705 - PEG activated NF - kappa B and increased monocyte chemotactic protein - 1 ( MCP - 1 ) expression in macrophages RAW264 . 7 via MyD88 dependent Toll - like receptor ( TLR ) signaling pathways .
 Chemical: PEG
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: PEG