The nicotinic acetylcholine receptor Dalpha7 is required for an escape behavior in Drosophila.

The nicotinic acetylcholine receptor Dalpha7 is required for an escape behavior in Drosophila.
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DOI:
10.1371/journal.pbio.0040063
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发表时间:
2006-03
期刊:
影响因子:
9.8
通讯作者:
Bellen HJ
Bellen HJ
中科院分区:
生物学1区
文献类型:
--
作者:
Fayyazuddin A;Zaheer MA;Hiesinger PR;Bellen HJ

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乙酰胆碱是昆虫中枢神经系统的主要兴奋性神经递质。果蝇Dα7烟碱型乙酰胆碱受体(nAChR)的突变分析表明,它是巨纤维介导的逃逸行为所必需的。Dα7蛋白在巨纤维的树突中富集,巨纤维回路的电生理学分析表明,巨纤维的感觉输入被破坏,外周突触中间神经元和背外侧肌运动神经元之间的胆碱能突触的传递也被破坏。此外,我们发现gfA1是D α7的一个等位基因,gfA1是20多年前在巨纤维缺陷筛查中发现的一个突变。因此,结合行为学、电生理学、解剖学和遗传学数据表明,Dα7 nAChR在果蝇巨纤维介导的逃逸中起重要作用。作者综合了行为学、电生理学、解剖学和遗传学数据,确定了Dα7 nAChR在果蝇巨纤维介导的逃逸中的重要作用。
Acetylcholine is the major excitatory neurotransmitter in the central nervous system of insects. Mutant analysis of the Dα7 nicotinic acetylcholine receptor (nAChR) ofDrosophila shows that it is required for the giant fiber-mediated escape behavior. The Dα7 protein is enriched in the dendrites of the giant fiber, and electrophysiological analysis of the giant fiber circuit showed that sensory input to the giant fiber is disrupted, as is transmission at an identified cholinergic synapse between the peripherally synapsing interneuron and the dorsal lateral muscle motor neuron. Moreover, we found thatgfA1, a mutation identified in a screen for giant fiber defects more than twenty years ago, is an allele ofDα7. Therefore, a combination of behavioral, electrophysiological, anatomical, and genetic data indicate an essential role for the Dα7 nAChR in giant fiber-mediated escape inDrosophila. The authors integrate behavioral, electrophysiological, anatomical, and genetic data to establish an essential role for the Dα7 nAChR in giant fiber-mediated escape inDrosophila.
DOI: 10.1002/gene.10137
发表时间: 2002-09-01
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