21297
Subsequently , the inhibition of NF - kappa B downstream gene expression ( IL - 8 and ICAM - 1 ) by the plant extracts was assessed via quantitative real time polymerase chain reaction ( qPCR ) .
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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