9717
We found that TPA ( 100 ng / ml ) induced MMP - 9 enzyme activity both dose - and time - dependently , and 200 mu M DHA and LA significantly inhibited MMP - 9 mRNA and protein expression , enzyme activity , cell migration , and invasion .
 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: TPA; Chemical: DHA