19014
Three XRs ( e . g . , PXR , CAR , and AhR ) , 27 transporters ( e . g . , ABCB1 and SLC22A8 ) , and 19 DMEs ( e . g . , CYP2B2 and CYP3A1 ) were regulated ( P < 0 . 05 ) with fold changes ranging from - 46 . 3 to 17 . 1 .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None