16999
The overexpression of miR - 663 in breast tumor tissues was associated with chemoresistance ; in MDA - MB - 231 cells , this chemoresistance was accompanied by the down - regulation of HSPG2 , which was identified as a target of miR - 663 .
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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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