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Updated: Feb 10, 2026
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Video Imaging and Spatiotemporal Maps to Analyze Gastrointestinal Motility in Mice
Published on: February 3, 2016
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Optogenetic Induction of Colonic Motility in Mice
Timothy J Hibberd1, Jing Feng2, Jialie Luo2
1College of Medicine and Public Health and Centre for Neuroscience, Flinders University, Adelaide, Australia.
Gastroenterology
|May 22, 2018
Summary
Optogenetics, using light to control nerve cells, successfully increased colon movement and fecal output in mice. This technique offers a potential non-drug approach to enhance gastrointestinal transit.
Area of Science:
- Gastroenterology
- Neuroscience
- Biotechnology
Background:
- Strategies to enhance gastrointestinal (GI) transit without systemic drugs are needed.
- Optogenetics offers a novel approach to modulate the enteric nervous system (ENS).
Purpose of the Study:
- To investigate if optogenetics can evoke propagating contractions and increase colonic transit in mice.
- To assess the potential of light-based neural stimulation for GI motility modulation.
Main Methods:
- Generated transgenic mice expressing channelrhodopsin-2 (ChR2) in calretinin neurons.
- Analyzed colonic myenteric neurons and assessed motility in vitro and in vivo.
- Used focal light stimulation and wireless light-emitting diodes for ENS activation.
Main Results:
- Focal light stimulation evoked propagating contractions and increased colonic motility in vitro.
- Light stimulation significantly increased fecal pellet expulsion in vitro and in vivo.
- Effects were dependent on neural activity and specific to ChR2-expressing neurons.
Conclusions:
- Focal optogenetic activation of enteric neurons can increase colonic motility.
- Optogenetics presents a promising non-pharmacological strategy for modifying gut motility.
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