Methods to Study the Myenteric Plexus of Rat Small Intestine

Area of Science:

• Neuroscience
• Gastroenterology
• Microbiology

Background:

• The gut-brain axis, involving the enteric nervous system, microbiome, and brain, is a key area of research.
• Existing protocols for tissue isolation and sample collection for studying this axis are not always transferable or straightforward.
• Standardized and high-quality methods are needed for investigating the enteric nervous system (ENS) in various physiological and pathological conditions.

Purpose of the Study:

• To present a novel, detailed protocol for the isolation and sample collection of rat myenteric plexus cells.
• To enable high-quality in vivo and in vitro studies of the postnatal developing enteric nervous system.
• To facilitate investigations into the complex interactions within the vertebrate gut-brain axis.

Main Methods:

• Development of a specialized LIENS chamber for optimal tissue quality during intestinal freezing.
• Preparation of cryosections from snap-frozen intestine for histological examination (e.g., immunohistochemistry).
• Utilization of laser microdissection for precise isolation of myenteric plexus ganglia from cryosections.
• Modernized protocol for the cultivation of myenteric neurons for in vitro studies.

Main Results:

• The LIENS chamber ensures optimal tissue quality for subsequent analyses.
• Cryosections allow for detailed histological examination and preparation of specific regions like mesenteric plexus ganglia.
• Laser microdissection yields high-quality, specific samples suitable for advanced analyses.
• The protocol supports the cultivation of viable myenteric neurons for diverse in vitro applications.

Conclusions:

• The presented protocol offers a robust and efficient method for obtaining high-quality rat myenteric plexus samples.
• This methodology supports a wide range of investigations into the developing enteric nervous system and gut-brain axis.
• The protocol is adaptable for both in vivo and in vitro studies, enhancing research capabilities in neuroscience and gastroenterology.