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When peripheral murine monocytes that do not express the lipoxygenase were treated with IL-4 expression of 12/15-lipoxygenase mRNA was induced, suggesting pretranslational control mechanisms .
 lipoxygenase, monocytes, 12/15-lipoxygenase, IL-4, 12/15-lipoxygenase mRNA
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:
 lipoxygenase, monocytes, 12/15-lipoxygenase, IL-4, 12/15-lipoxygenase mRNA