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Astrocytes are currently studied intensively because of their now highlighted relevance as key players with neurons that modulate a wide range of central functions , from synaptic plasticity and synaptogenesis to regulation of metabolic and neuroinflammatory processes .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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