Phase Coupling of a Circadian Neuropeptide With Rest/Activity Rhythms Detected Using a Membrane-Tethered Spider Toxin
2008
Spider Toxin Affects Circadian Rhythms in Fruit Flies
publication
10 minutes
Evidence: high
Author Information
Author(s): Wu Ying Cao, Guan Pavlicek, Beth Luo, Xuan Nitabach, Michael N. Nitabach
Primary Institution: Yale School of Medicine
Hypothesis
PDF-secreting clock neurons entrain the phase of organismal rhythms via the temporal patterning of secreted PDF signals.
Conclusion
The study shows that a membrane-tethered spider toxin can phase advance the rhythm of PDF accumulation and locomotor activity in fruit flies.
Supporting Evidence
- Membrane-tethered δ-ACTX-Hv1a expression in PDF-secreting neurons induces a phase advance of PDF accumulation.
- Flies expressing the spider toxin exhibit altered locomotor activity patterns.
- The study validates the use of tethered-toxin technology in transgenic Drosophila.
Takeaway
Researchers used a spider toxin to change how fruit flies' internal clocks work, making them more active in the morning.
Methodology
The study used a novel technique involving a membrane-tethered spider toxin to modify Na+ channel inactivation in Drosophila clock neurons.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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