15545
Hypothalamic RT - PCR showed that mRNA expression of the anorexigenic genes POMC and CART was up - regulated by 1 , 2 , 5 and 1 , 2 , respectively , while that of the orexigenic genes NPY and CaMKK2 was down - regulated by the respective compounds 1 , 5 , 6 and 1 , 2 , 5 .
 None
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:  
Answer:
 None