郊区一日游:果蝇视觉系统中的昼夜节律。

Milena Damulewicz, Gabriella M Mazzotta
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引用次数: 0

摘要

生物体经常暴露在周期性变化的环境中,它们的视觉系统需要高度的可塑性,以应对每日和季节性的光照条件波动。在黑腹果蝇中,视觉系统是一个复杂的组织,由不同的光感受结构组成,在基因表达、细胞形态和突触可塑性方面表现出日节律,并受中枢和外周时钟的调控。在这篇综述中,我们简要概述了果蝇昼夜节律钟和视觉系统的结构,并全面描述了视觉结构中从分子到行为的昼夜节律振荡,这些振荡是视觉敏感性微调的基础。我们还比较了视觉系统与中央起搏器节律性的一些特征,并假设了控制这两种时钟的调节信号和机制的差异。
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A one-day journey to the suburbs: circadian clock in the Drosophila visual system.

Living organisms, which are constantly exposed to cyclical variations in their environment, need a high degree of plasticity in their visual system to respond to daily and seasonal fluctuations in lighting conditions. In Drosophila melanogaster, the visual system is a complex tissue comprising different photoreception structures that exhibit daily rhythms in gene expression, cell morphology, and synaptic plasticity, regulated by both the central and peripheral clocks. In this review, we briefly summarize the structure of the circadian clock and the visual system in Drosophila and comprehensively describe circadian oscillations in visual structures, from molecules to behaviors, which are fundamental for the fine-tuning of visual sensitivity. We also compare some features of the rhythmicity in the visual system with that of the central pacemaker and hypothesize about the differences in the regulatory signals and mechanisms that control these two clocks.

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