5715
Our results suggest that sustained activation of CB ( 2 ) receptors would enhance beta - Arrestin 2 expression possibly contributing to its increased interaction with ERK1 / 2 , thereby driving the upregulation of 5 - HT ( 2A ) receptors .
 Chemical: 5 - HT
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: 5 - HT