Dissecting the daily feeding pattern: Peripheral CLOCK/CYCLE generate the feeding/fasting episodes and neuronal molecular clocks synchronize them.

Dissecting the daily feeding pattern: Peripheral CLOCK/CYCLE generate the feeding/fasting episodes and neuronal molecular clocks synchronize them.
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DOI:
10.1016/j.isci.2023.108164
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发表时间:
2023-11-17
期刊:
影响因子:
5.8
通讯作者:
Ando, Kanae
Ando, Kanae
中科院分区:
综合性期刊2区
文献类型:
--
作者:
Maruko, Akiko;Iijima, Koichi M.;Ando, Kanae

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一个24小时的进食行为节奏,或在白天同步进食/禁食事件,是生存的关键。内部时钟和光输入调节有节奏的行为,但它们如何产生进食节奏尚未完全了解。在这里,我们的目的是剖析产生日常喂养模式的分子途径。通过测量单个果蝇的半日摄食量,我们证明了光暗条件下的摄食节律的产生需要准模(qsm),而不是分子钟。在恒定的黑暗下,有节奏的进食模式由两个组成部分组成:消化/代谢组织中的时钟(CLK)产生进食/禁食事件,神经元中的分子钟使它们与主观的白天同步。虽然CLK是分子钟的一部分,但代谢组织中CLK产生的进食/禁食事件独立于分子钟机制。我们的研究结果揭示了qsm和CLK在果蝇摄食节律中的新功能。QSM介导光诱导的进食事件同步化代谢组织中的CLK/CYC产生神经元中的进食/禁食事件PER/TIM在恒定黑暗下同步进食/禁食事件分子神经科学;细胞神经科学
A 24-h rhythm of feeding behavior, or synchronized feeding/fasting episodes during the day, is crucial for survival. Internal clocks and light input regulate rhythmic behaviors, but how they generate feeding rhythms is not fully understood. Here we aimed to dissect the molecular pathways that generate daily feeding patterns. By measuring the semidiurnal amount of food ingested by single flies, we demonstrate that the generation of feeding rhythms under light:dark conditions requires quasimodo (qsm) but not molecular clocks. Under constant darkness, rhythmic feeding patterns consist of two components: CLOCK (CLK) in digestive/metabolic tissues generating feeding/fasting episodes, and the molecular clock in neurons synchronizing them to subjective daytime. Although CLK is a part of the molecular clock, the generation of feeding/fasting episodes by CLK in metabolic tissues was independent of molecular clock machinery. Our results revealed novel functions of qsm and CLK in feeding rhythms in Drosophila. QSM mediates the light-induced synchronization of feeding episodes CLK/CYC in metabolic tissues generate feeding/fasting episodes PER/TIM in neurons synchronize feeding/fasting episodes under constant darkness Molecular neuroscience; Cellular neuroscience
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