Enteric neurons from postnatal Fgf2 knockout mice differ in neurite outgrowth responses

Area of Science:

• Neuroscience
• Developmental Biology
• Gastroenterology

Background:

• The enteric nervous system (ENS) comprises diverse neuronal subtypes crucial for gut function.
• Neurotrophic factors are essential for ENS development, maintenance, and adaptation to changing physiological conditions.
• Basic-fibroblast-growth-factor (Fgf2) is implicated in neurotrophic support within the ENS.

Purpose of the Study:

• To investigate the role of Fgf2 in ENS development and neurotrophic support.
• To compare the neurotrophic responsiveness of myenteric plexus cultures from wild-type and Fgf2-knockout mice.

Main Methods:

• Primary myenteric plexus cultures were established from wild-type and Fgf2-knockout mice.
• Cultures were treated with Fgf2 and glial-cell-line-derived-factor (GDNF) to assess neurotrophic effects.
• Neuronal maturation and differentiation were evaluated under varying neurotrophic conditions.

Main Results:

• Fgf2-knockout mice exhibited diminished responsiveness to neurotrophic support in ENS cultures.
• Wild-type neuronal cultures demonstrated enhanced receptiveness to trophic factors compared to knockout counterparts.
• These findings indicate a significant role for Fgf2 in supporting ENS development.

Conclusions:

• Fgf2 is a key neurotrophic factor contributing to the development and maintenance of the enteric nervous system.
• The absence of Fgf2 impairs the ENS's ability to respond to essential neurotrophic signals.
• This study highlights Fgf2's importance in ensuring proper neuronal maturation and differentiation within the ENS.