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Published on: December 29, 2023
Neuropeptide signaling: from the gut
Buyun Zhao1, William R Schafer
1MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK.
Current Biology : CB
|June 8, 2013
Summary
A neuropeptide acts as a neurotransmitter in C. elegans defecation, signaling from intestinal cells to motor neurons. This discovery clarifies the neural control of enteric muscle contraction and defecation motor programs.
Area of Science:
- Neurobiology
- Developmental Biology
- Animal Behavior
Background:
- The defecation motor program in Caenorhabditis elegans relies on intestinal pacemaker rhythms activating motor neurons.
- The precise signaling mechanism between intestinal cells and motor neurons controlling enteric muscle contraction remains incompletely understood.
Purpose of the Study:
- To identify the signaling molecule responsible for transmitting the pacemaker rhythm from intestinal cells to motor neurons.
- To characterize the mechanism by which this signal modulates motor neuron activity.
Main Methods:
- Utilized genetic analysis and electrophysiology in Caenorhabditis elegans.
- Investigated neuropeptide signaling pathways within the enteric nervous system.
Main Results:
- Identified a specific neuropeptide released by intestinal cells.
- Demonstrated that this neuropeptide acutely depolarizes enteric motor neurons.
- Showed the neuropeptide functions analogously to a classical neurotransmitter in regulating muscle contraction.
Conclusions:
- A neuropeptide is the key signaling molecule mediating the intestinal pacemaker rhythm to motor neurons.
- This neuropeptide plays a critical role in the neural control of the defecation motor program.
- The findings reveal a novel neurotransmitter role for neuropeptides in invertebrate enteric neurobiology.
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