How Neuropeptide Signaling Affects Circadian Rhythms in Mice
Author Information
Author(s): Hughes Alun T. L., Guilding Clare, Piggins Hugh D.
Primary Institution: Faculty of Life Sciences, University of Manchester, Manchester, United Kingdom
Hypothesis
The study investigates whether the absence of VPAC2 receptors affects circadian rhythms in extra-SCN tissues of mice.
Conclusion
The study found that while extra-SCN circadian oscillations are maintained in mice lacking VPAC2 receptors, their ability to resist phase shifts is compromised.
Supporting Evidence
- Vipr2−/− SCN cultures showed lower amplitude PER2::LUC oscillations than wild type.
- Extra-SCN tissues maintained rhythm parameters despite the absence of VPAC2 receptors.
- Phase of Vipr2−/− SCN cultures was reset by the culture procedure.
Takeaway
This study shows that certain brain areas in mice can keep their daily rhythms even without a specific receptor, but they can't handle changes as well.
Methodology
The study used wild type and Vipr2−/− mice expressing a luciferase reporter to measure circadian rhythms in various brain tissues.
Limitations
The study does not explore the underlying mechanisms of the observed phase resetting in Vipr2−/− mice.
Participant Demographics
Adult male mice on a C57BL/6 background.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website