14076
At the molecular level , the regimen , but not single agents , induced time - dependent upregulation of tumor suppressor protein p53 ; however , introduction of a p53 inhibitor staved neither MMP nor apoptosis .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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