8358
Finally , we found increased ionotropic glutamate receptor responsiveness and miniature excitatory postsynaptic current ( EPSC ) frequency in DA - MSN co - cultures , in parallel with a higher number of spines containing PSD - 95 , suggesting that the newly formed spines present functional post - synaptic machinery preparing the MSNs to receive additional glutamatergic contacts .
 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