Plasticity of enteric neurotransmission varies during day-night cycles and with feeding state.

IF 3.9 3区 医学 Q1 GASTROENTEROLOGY & HEPATOLOGY
Anita J L Leembruggen, Gunes S Yildiz, Justin P Hardee, Lincon A Stamp, Joel C Bornstein, Marlene M Hao
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引用次数: 0

Abstract

The circadian cycle is a fundamental biological rhythm that governs many physiological functions across nearly all living organisms. In the gastrointestinal tract, activities such as gut motility, hormone synthesis, and communication between the gut, central nervous system, and microbiome all fluctuate in alignment with the circadian cycle. The enteric nervous system (ENS) is critical for coordinating many of these activities; however, how its activity is governed by the circadian cycle remains unknown. In this study, we used live calcium imaging to examine alterations in enteric neurotransmission during the 24-h day/night cycle in mice. In addition, given the role of food timing as a potent circadian entrainer, we also investigated the impact of an acute 13-h fast on ENS activity. Our findings reveal that enteric neuronal activity typically increases during the dark phase but shifts to the light phase following an acute fast. Importantly, these changes in neuronal activity were not accompanied by alterations in the gene expression of associated neurotransmitter receptors.NEW & NOTEWORTHY Neuronal activity in the enteric nervous system changes during the 24-h day/night cycle, with increased neuronal function detected at night when mice are feeding and active. However, following an acute fast, neuronal sensitivity becomes more pronounced during the day. These changes in neuronal function did not correlate with changes in neurotransmitter receptor gene expression levels.

肠道神经传递的可塑性随昼夜周期和摄食状态而变化。
昼夜节律是一种基本的生物节律,它支配着几乎所有生物体的许多生理功能。在胃肠道中,肠道运动、激素合成以及肠道、中枢神经系统和微生物群之间的交流等活动都随着昼夜周期而波动。肠神经系统(ENS)对协调许多这些活动至关重要;然而,它的活动如何受昼夜周期的支配仍然未知。在这项研究中,我们使用活钙成像来检查小鼠在24小时昼夜周期内肠内神经传递的变化。此外,考虑到食物时间作为一种有效的昼夜节律调节器的作用,我们还研究了急性禁食13小时对ENS活动的影响。我们的研究结果表明,肠道神经元活动通常在黑暗阶段增加,但在急性快速后转移到光明阶段。重要的是,这些神经元活动的变化并不伴随着相关神经递质受体基因表达的改变。肠道神经系统的神经元活动在24小时的昼夜周期中发生变化,在夜间小鼠进食和活动时检测到神经元功能增加。然而,在急性禁食之后,神经元的敏感性在白天变得更加明显。这些神经元功能的变化与神经递质受体基因表达水平的变化无关。
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来源期刊
CiteScore
9.40
自引率
2.20%
发文量
104
审稿时长
1 months
期刊介绍: The American Journal of Physiology-Gastrointestinal and Liver Physiology publishes original articles pertaining to all aspects of research involving normal or abnormal function of the gastrointestinal tract, hepatobiliary system, and pancreas. Authors are encouraged to submit manuscripts dealing with growth and development, digestion, secretion, absorption, metabolism, and motility relative to these organs, as well as research reports dealing with immune and inflammatory processes and with neural, endocrine, and circulatory control mechanisms that affect these organs.
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