6362
We have demonstrated that the activation of P2X3 receptor on peripheral afferent neurons is critical to development of inflammatory hyperalgesia in peripheral tissue , although pharmacological administration of prostaglandin E ( 2 ) or sympathomimetic amines is enough to sensitize primary afferent neurons by acting directly in neuronal receptors .
 Chemical: prostaglandin E ( 2 ); Chemical: amines
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: prostaglandin E ( 2 ); Chemical: amines