9723
HO - 1 siRNA alleviated the inhibition by DHA of TPA - induced MMP - 9 protein expression and enzyme activity in MCF - 7 cells , and HO - 1 knockdown reversed the DHA inhibition of cell migration .
 Chemical: DHA; Chemical: TPA; Chemical: DHA
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: DHA; Chemical: TPA; Chemical: DHA