Peripheral Clocks
Peripheral Clocks - Related Videos
07:19
Clock Scan Protocol for Image Analysis: ImageJ Plugins
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Cited by 16 •
2017
This paper describes two novel ImageJ plugins for 'Clock Scan' image analysis. These plugins expand the functionality of the original visual basic 6 program and, most importantly, make the program available to a large research community by bundling it with the ImageJ free image analysis software package.
03:08
Embedding Drosophila Brain in a Matrix for Time-Lapse Imaging of the Circadian Clock Neurons
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2025
Source: Sabado, V., et al., Nagoshi, E. Single-cell Resolution Fluorescence Live Imaging of Drosophila Circadian Clocks in Larval Brain Culture. J. Vis. Exp. (2018). This video demonstrates the procedure to embed the Drosophila brain in a fibrin matrix, followed by time-lapse fluorescence imaging of circadian clock neurons to analyze rhythmic activity synchronized with light/dark cycles.
10:38
Monitoring Cell-autonomous Circadian Clock Rhythms of Gene Expression Using Luciferase Bioluminescence Reporters
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Cited by 78 •
2012
Circadian clocks function within individual cells, i.e., they are cell-autonomous. Here, we describe methods for generating cell-autonomous clock models using non-invasive, luciferase-based real-time bioluminescence technology. Reporter cells provide tractable, functional model systems for studying circadian biology.
07:42
Rapid Analysis of Circadian Phenotypes in Arabidopsis Protoplasts Transfected with a Luminescent Clock Reporter
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Cited by 18 •
2016
The circadian clock regulates about a third of the Arabidopsis transcriptome, but the percentage of genes that feed back into timekeeping remains unknown. Here we visualize a method to rapidly assess circadian phenotypes in any mutant line of Arabidopsis using luminescent imaging of a circadian reporter transiently expressed in protoplasts.
02:45
Biological Clocks and Seasonal Responses
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2025
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod. One example of photoperiodism in plants is seasonal flowering. Scientists believe that plants are cued to flower...
FAQs
CLOCK and BMAL1 participate in transcriptional feedback loops that regulate production of PER and CRY proteins. As these proteins accumulate, they feed back on the transcriptional machinery, creating repeating changes in gene activity over approximately 24 hours. This molecular cycle provides the timing framework that allows individual cells to coordinate daily physiological functions.
These signals help align cellular oscillations with the organism’s environmental and physiological state. Feeding can communicate time-of-day information to tissues, while hormones and body temperature provide additional synchronization cues. Their influence is important because peripheral timing must remain coordinated with light-driven neural signals and with changing demands on metabolism and other body functions.
Peripheral clocks operate outside the suprachiasmatic nucleus, yet they do not function in isolation from it. Light-driven neural input from the central pacemaker helps coordinate timing across tissues, while feeding, hormones, and temperature also adjust local rhythms. This arrangement supports communication between central and peripheral timing systems rather than relying on a single timing signal.
Research on Peripheral Clocks can clarify how circadian timing influences metabolism, sleep, behavior, and communication between tissues. Examining these relationships connects molecular oscillations in cells with broader neural and physiological outcomes. The approach therefore helps researchers investigate how timing information is distributed through the body and how altered coordination may affect brain-related functions.
Shift work and jet lag provide contexts in which environmental schedules may become misaligned with internal timing. Studying peripheral clocks helps researchers examine how tissues respond when daily cues no longer coordinate normally. This work can improve understanding of altered physiology associated with disrupted timing and the communication problems that may arise between body systems.
Peripheral-clock research may reveal how disrupted daily timing relates to physiological changes relevant to neurodegenerative disease. It can also provide a basis for investigating whether treatment timing should be considered when studying therapeutic responses. These applications extend circadian research beyond basic rhythm description toward understanding disease-related timing and the potential value of time-sensitive therapies.