11568
L . johnsonii CFS significantly reduced IDO activity in HT - 29 intestinal epithelial cells ( 47 % reduction ) compared with that in vehicle - treated controls , an effect abolished by catalase treatment .
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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