The CCHamide1 Neuropeptide Expressed in the Anterior Dorsal Neuron 1 Conveys a Circadian Signal to the Ventral Lateral Neurons in Drosophila melanogaster.
The CCHamide1 Neuropeptide Expressed in the Anterior Dorsal Neuron 1 Conveys a Circadian Signal to the Ventral Lateral Neurons in Drosophila melanogaster.
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DOI：
10.3389/fphys.2018.01276
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发表时间：
2018
影响因子：
4
通讯作者：
Yoshii T
中科院分区：
文献类型：
--
作者：
Fujiwara Y;Hermann-Luibl C;Katsura M;Sekiguchi M;Ida T;Helfrich-Förster C;Yoshii T
The fruit fly Drosophila melanogaster possesses approximately 150 brain clock neurons that control circadian behavioral rhythms. Even though individual clock neurons have self-sustaining oscillators, they interact and synchronize with each other through a network. However, little is known regarding the factors responsible for these network interactions. In this study, we investigated the role of CCHamide1 (CCHa1), a neuropeptide expressed in the anterior dorsal neuron 1 (DN1a), in intercellular communication of the clock neurons. We observed that CCHa1 connects the DN1a clock neurons to the ventral lateral clock neurons (LNv) via the CCHa1 receptor, which is a homolog of the gastrin-releasing peptide receptor playing a role in circadian intercellular communications in mammals. CCHa1 knockout or knockdown flies have a generally low activity level with a special reduction of morning activity. In addition, they exhibit advanced morning activity under light-dark cycles and delayed activity under constant dark conditions, which correlates with an advance/delay of PAR domain Protein 1 (PDP1) oscillations in the small-LNv (s-LNv) neurons that control morning activity. The terminals of the s-LNv neurons show rather high levels of Pigment-dispersing factor (PDF) in the evening, when PDF is low in control flies, suggesting that the knockdown of CCHa1 leads to increased PDF release; PDF signals the other clock neurons and evidently increases the amplitude of their PDP1 cycling. A previous study showed that high-amplitude PDP1 cycling increases the siesta of the flies, and indeed, CCHa1 knockout or knockdown flies exhibit a longer siesta than control flies. The DN1a neurons are known to be receptive to PDF signaling from the s-LNv neurons; thus, our results suggest that the DN1a and s-LNv clock neurons are reciprocally coupled via the neuropeptides CCHa1 and PDF, and this interaction fine-tunes the timing of activity and sleep.
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影响因子：
2.5
作者：
Helfrich-Förster, C
通讯作者：
Helfrich-Förster, C
影响因子：
3.6
作者：
Aida, R;Moriya, T;Shibata, S
通讯作者：
Shibata, S
DOI：
10.1007/s003590050192
发表时间：
1998-04-01
期刊：
JOURNAL OF COMPARATIVE PHYSIOLOGY A-SENSORY NEURAL AND BEHAVIORAL PHYSIOLOGY
影响因子：
--
作者：
Helfrich-Förster, C
通讯作者：
Helfrich-Förster, C
影响因子：
64.8
作者：
Grima, B;Chèlot, E;Rouyer, F
通讯作者：
Rouyer, F
影响因子：
9.8
作者：
Collins B;Kaplan HS;Cavey M;Lelito KR;Bahle AH;Zhu Z;Macara AM;Roman G;Shafer OT;Blau J
通讯作者：
Blau J