Vagal nerve stimulation modulates gut injury and lung permeability in trauma-hemorrhagic shock.

Published

Journal Article

BACKGROUND: Hemorrhagic shock is known to disrupt the gut barrier leading to end-organ dysfunction. The vagus nerve can inhibit detrimental immune responses that contribute to organ damage in hemorrhagic shock. Therefore, we explored whether stimulation of the vagus nerve can protect the gut and recover lung permeability in trauma-hemorrhagic shock (THS). METHODS: Male Sprague-Dawley rats were subjected to left cervical vagus nerve stimulation at 5 V for 10 minutes. The right internal jugular and femoral artery were cannulated for blood withdrawal and blood pressure monitoring, respectively. Animals were then subjected to hemorrhagic shock to a mean arterial pressure between 30 mm Hg and 35 mm Hg for 90 minutes then reperfused with their own whole blood. After observation for 3 hours, gut permeability was assessed with fluorescein dextran 4 in vivo injections in a ligated portion of distal ileum followed by Evans blue dye injection to assess lung permeability. Pulmonary myeloperoxidase levels were measured and compared. RESULTS: Vagal nerve stimulation abrogated THS-induced lung injury (mean [SD], 8.46 [0.36] vs. 4.87 [0.78]; p < 0.05) and neutrophil sequestration (19.39 [1.01] vs. 12.83 [1.16]; p < 0.05). Likewise, THS gut permeability was reduced to sham levels. CONCLUSION: Neuromodulation decreases injury in the THS model as evidenced by decreased gut permeability as well as decreased lung permeability and pulmonary neutrophil sequestration in a rat model.

Full Text

Duke Authors

Cited Authors

  • Levy, G; Fishman, JE; Xu, D-Z; Dong, W; Palange, D; Vida, G; Mohr, A; Ulloa, L; Deitch, EA

Published Date

  • August 2012

Published In

Volume / Issue

  • 73 / 2

Start / End Page

  • 338 - 342

PubMed ID

  • 22846937

Pubmed Central ID

  • 22846937

Electronic International Standard Serial Number (EISSN)

  • 2163-0763

Digital Object Identifier (DOI)

  • 10.1097/TA.0b013e31825debd3

Language

  • eng

Conference Location

  • United States