3697
These results were ascribed to the up - regulation of hERG at both mRNA and protein levels via an increase in the expression of transcription factor Sp1 , an established transactivator of the hERG gene .
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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:
 None