894
Reducing the excitatory action of glutamate , the major excitatory neurotransmitter in the basal ganglia , should lead to symptomatic improvement for PD patients and may promote the survival of DA neurons .
 Chemical: glutamate
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: glutamate