Department of Neurobiology; Weaver Lab
Endocrinology | Neuroscience and Neurobiology | Nutritional and Metabolic Diseases
Disturbing the circadian regulation of physiology by disruption of the rhythmic environment is associated with adverse health outcomes but the underlying mechanisms are unknown. Here, the response of central and peripheral circadian clocks to an advance or delay of the light-dark cycle was determined in mice. This identified transient damping of peripheral clocks as a consequence of an advanced light-dark cycle. Similar depression of peripheral rhythm amplitude was observed in mice exposed to repeated phase shifts. To assess the metabolic consequences of such peripheral amplitude depression in isolation, temporally chimeric mice lacking a functional central clock (Vgat-Cre(+) Bmal1(fl/fl) ) were housed in the absence of environmental rhythmicity. In vivo PER2::LUC bioluminescence imaging of anesthetized and freely moving mice revealed that this resulted in a state of peripheral amplitude depression, similar in severity to that observed transiently following an advance of the light-dark cycle. Surprisingly, our mice did not show alterations in body mass or glucose tolerance in males or females on regular or high-fat diets. Overall, our results identify transient damping of peripheral rhythm amplitude as a consequence of exposure to an advanced light-dark cycle but chronic damping of peripheral clocks in isolation is insufficient to induce adverse metabolic outcomes in mice.
external misalignment, internal desynchrony, internal misalignment, metabolism, peripheral oscillator, rhythm amplitude, suprachiasmatic nucleus
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DOI of Published Version
van der Vinne V, Martin Burgos B, Harrington ME, Weaver DR. Deconstructing circadian disruption: Assessing the contribution of reduced peripheral oscillator amplitude on obesity and glucose intolerance in mice. J Pineal Res. 2020 Apr 3:e12654. doi: 10.1111/jpi.12654. Epub ahead of print. PMID: 32243642. Link to article on publisher's site
Journal of pineal research
van der Vinne V, Martin Burgos B, Harrington ME, Weaver DR. (2020). Deconstructing circadian disruption: Assessing the contribution of reduced peripheral oscillator amplitude on obesity and glucose intolerance in mice. Neurobiology Publications. https://doi.org/10.1111/jpi.12654. Retrieved from https://escholarship.umassmed.edu/neurobiology_pp/258
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This work is licensed under a Creative Commons Attribution 4.0 License.