18495
The serum or dexamethasone - induced oscillation in the expression of DRD3 in cells was abrogated by the downregulation or overexpression of REV - ERB alpha , suggesting that REV - ERB alpha functions as a regulator of DRD3 oscillations in the cellular autonomous clock .
 Chemical: dexamethasone
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: dexamethasone 
Answer:
 Chemical: dexamethasone