17608
In addition , there was a clear inhibition of the transcription factor NF - kappa B and downregulation of cyclin D1 , with enforced inhibition of the HaCaT cell cycle progression .
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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