1646
Altogether , our results prove the importance of vitamin E homeostasis in the somatostatin receptor - effector system and suggest a possible mechanism by which this vitamin may regulate the neuronal cell survival in the adult hippocampus .
 Chemical: vitamin E; Chemical: somatostatin
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: vitamin E; Chemical: somatostatin