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Recombinant adeno - associated virus ( rAAV ) - mediated Ugcg delivery to the arcuate nucleus ( Arc ) significantly ameliorated obesity , specifying gangliosides as seminal components for hypothalamic regulation of body energy homeostasis .
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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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