Hyperactive Enteric Glia Contribute to Persistent Dysmotility Following Inflammation by Driving Aberrant Excitatory...

Area of Science:

• Gastroenterology
• Neuroscience
• Cell Biology

Background:

• Gut inflammation can cause long-term motor dysfunction, even after inflammation resolves.
• These persistent changes are linked to neuroplasticity in the enteric nervous system (ENS).
• Understanding the mechanisms driving ENS neuroplasticity post-inflammation is crucial for treating related disorders like IBS and IBD.

Purpose of the Study:

• To investigate if acute inflammation induces glial changes that promote neuron hyperexcitability.
• To determine the role of these glial changes in subsequent gut motor dysfunction.

Main Methods:

• Utilized genetically encoded Ca2+ sensors to study cellular activity in ENS motor neurocircuits.
• Employed chemogenetics to manipulate and assess glial and neuronal function.
• Examined gut motor function following the resolution of acute inflammation.

Main Results:

• Enteric glia become hyperexcitable after acute inflammation, driving abnormal neuronal excitation.
• This glial hyperexcitability disrupts gut motor control and alters neuronal activity.
• Key mechanisms include altered nitrergic inhibition, prostaglandin E2, and enhanced connexin-43 hemichannel activity in glia.

Conclusions:

• Enteric glia play a critical role in persistent gut dysmotility following inflammation.
• Therapies targeting enteric glial signaling pathways show potential for treating chronic gut motor disorders.