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Following co - treatment with ATX and MPP + , cell viability was significantly increased , and Sp1 and NR1 mRNA and protein were decreased , compared with the MPP + groups ( p < 0 . 01 ) .
 Chemical: ATX; Chemical: MPP +; Chemical: MPP +
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: ATX; Chemical: MPP +; Chemical: MPP +