Why Inflammation Boosts Vagus Nerve Signaling By 2.3 Fold

Your Vagus Nerve *loves* inflammation, so much it boost Vagal signaling 2.3 fold !

This might be why people who are using VNS (Ultrasound, electrical, etc) - may actually only need to use a little bit, since their Vagus Nerve is going to activate more, with less, very interesting study !

The vagus nerve is traditionally categorized as the primary conduit for "rest and digest" functions. However, recent research on acute pancreatitis reveals it also serves as a critical, inflammation-triggered pain superhighway.

In mice, caerulein-induced inflammation upregulates nociceptive markers such as TRPV1, Nav1.8, and CGRP within subdiaphragmatic vagal afferents. This enables the vagus to co-transmit visceral pain signals alongside traditional spinal pathways.

Using NaV1.8-Cre mice and chemogenetic inhibition (hM4Di-DREADD), studies show that silencing these vagal fibers reduces pain behaviors by up to 62%. Inflammation increases vagal neuron excitability 2.3-fold, projecting directly to the nucleus tractus solitarius (NTS).

These findings position the vagus nerve as a high-precision target for neuromodulation. Vagus Nerve Stimulation (VNS) could eventually provide a non-opioid alternative for managing the intense agony associated with pancreatic inflammation.

https://www.sciencedirect.com/science/article/pii/S0889159126002990

0 comments