16220
Rederivation of Fxr - deficient mice as GF demonstrated that the gut microbiota regulated expression of fibroblast growth factor 15 in the ileum and cholesterol 7 alpha - hydroxylase ( CYP7A1 ) in the liver by FXR - dependent mechanisms .
 Chemical: cholesterol
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: cholesterol