Refining Enteric Neural Circuitry by Quantitative Morphology and Function in Mice.

Area of Science:

• Neuroscience
• Gastroenterology
• Comparative Anatomy

Background:

• Mouse models are crucial for studying the enteric nervous system (ENS) and its role in gut motility disorders.
• A lack of comprehensive quantitative data on the murine colonic ENS hinders its effective use as a model for human conditions.

Purpose of the Study:

• To provide a quantitative description of the mouse colon's ENS architecture, connectivity, and function.
• To assess the utility of the mouse colon as a surrogate for studying the human and other mammalian ENS.

Main Methods:

• Quantitative confocal microscopy and 3D image reconstruction.
• GCaMP imaging combined with pharmacological interventions.
• Analysis of neural circuit dynamics and functional connectivity.

Main Results:

• Demonstrated regional structural variations and variable neuronal distribution within the mouse colon.
• Established that these architectural features define neural circuit dynamics and functional connectivity.
• Showcased how these factors are responsible for colonic motor patterns and regional functional differences.

Conclusions:

• The quantitative data advances the utility of multispecies and gut region-specific data for ENS research.
• Highlights the importance of structural and functional characterization for accurate modeling of gut disorders.
• Supports the use of the mouse colon as a relevant model for human ENS research, with considerations for regional specificity.