A novel method for culturing enteric neurons generates neurospheres containing functional myenteric neuronal subtypes

Area of Science:

• Neuroscience
• Gastroenterology
• Stem Cell Biology

Background:

• The enteric nervous system (ENS) controls vital gastrointestinal functions.
• Efficient culture of enteric neurons is crucial for studying ENS processes, diseases, and treatments.

Purpose of the Study:

• To develop a simple, robust, one-step method for culturing murine enteric neurospheres in a 3D matrix.
• To support neural growth and differentiation for research applications.

Main Methods:

• Isolated myenteric plexus cells from adult murine small intestine.
• Utilized a 3D Matrigel matrix for neurosphere culture.
• Cultured neurospheres in the presence of GDNF, EGF, and FGF2.

Main Results:

• Formed over 3000 neurospheres within 7 days, containing neural stem/progenitor cells (Sox2, Sox10, Msi1, Nestin).
• Generated extensive neurons (Tubulin beta III, PGP9.5, HuD/C, NeuN) and subtypes (Calretinin, ChAT, nNOS) within 8 days.
• Differentiated neurons exhibited depolarization-induced action potentials, inhibited by Tetrodotoxin.

Conclusions:

• Developed a novel, robust 3D culture system for enteric neurons.
• This method yields electrophysiologically active neurons from adult myenteric neural stem and progenitor cells.
• Facilitates advancements in understanding ENS regulation, pathophysiology, and therapeutics.