4900
Here we examined the expression of OXA immunoreactive ( OXA - IR ) cells in the lateral hypothalamus ( LH ) and the protein level of orexin 1 receptor ( OX1R ) in the RVLM of SIHR , and we found that the expressions of OXA - IR and OX1R were higher than those of the control group .
 None
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