Coordination between Drosophila Arc1 and a specific population of brain neurons regulates organismal fat.
Coordination between Drosophila Arc1 and a specific population of brain neurons regulates organismal fat.
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果蝇 Arc1 和特定脑神经元群之间的协调调节有机体脂肪。
DOI:
10.1016/j.ydbio.2015.07.021
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发表时间:
2015
影响因子:
2.7
通讯作者:
Reis,Tânia
中科院分区:
文献类型:
--
作者:
Mosher,Jeremy;Zhang,Wei;Blumhagen,RachelZ;D'Alessandro,Angelo;Nemkov,Travis;Hansen,KirkC;Hesselberth,JayR;Reis,Tânia
The brain plays a critical yet incompletely understood role in regulating organismal fat. We performed a neuronal silencing screen inDrosophilalarvae to identify brain regions required to maintain proper levels of organismal fat. When used to modulate synaptic activity in specific brain regions, the enhancer-trap driver line E347 elevated fat upon neuronal silencing, and decreased fat upon neuronal activation. Unbiased sequencing revealed thatArc1mRNA levels increase upon E347 activation. We had previously identifiedArc1mutations in a high-fat screen. Here we reveal metabolic changes inArc1mutants consistent with a high-fat phenotype and an overall shift toward energy storage. We find that Arc1-expressing cells neighbor E347 neurons, and manipulating E347 synaptic activity alters Arc1 expression patterns. Elevating Arc1 expression in these cells decreased fat, a phenocopy of E347 activation. Finally, loss of Arc1 prevented the lean phenotype caused by E347 activation, suggesting that Arc1 activity is required for E347 control of body fat. Importantly, neither E347 nor Arc1 manipulation altered energy-related behaviors. Our results support a model wherein E347 neurons induce Arc1 in specific neighboring cells to prevent excess fat accumulation.
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