Inhibition of histamine-induced bronchoconstriction in guinea pig and swine by pulsed electrical vagus nerve stimulation

Thomas J. Hoffmann, Steven Mendez, Peter Staats, Charles W. Emala, Puyun Guo

Research output: Contribution to journalArticlepeer-review

Abstract

Objective. Smooth muscle help regulate the diameter of the airways and their constriction can contribute to the pathology of acute asthma attacks. This study sought to determine if applying a specific electrical signal to the vagus nerve (VN) could minimize histamine-induced bronchoconstriction. Methods. Sixteen guinea pigs and three swine were anesthetized and had bipolar electrodes positioned on the cervical VNs. After the animals stabilized, i.v. histamine was titrated to elicit a moderate 2-4 cm H2O increase in pulmonary inflation pressure (Ppi). Histamine was then dosed with or without concurrent low voltage VN stimulation. Results. The peak change in Ppi following a histamine challenge was reduced in the guinea pig by VN stimulation (3.4 ± 0.4 vs. 2.1 ± 0.2 cm H2O, p < 0.001). The results were confirmed in a limited study in swine and indicate VN treatment is applicable to larger animals. Conclusion. This study suggests that VN stimulation can reduce bronchoconstriction and may prove useful as a rescue therapy in the treatment of acute asthma.

Original languageEnglish (US)
Pages (from-to)261-269
Number of pages9
JournalNeuromodulation
Volume12
Issue number4
DOIs
StatePublished - Oct 1 2009

Keywords

  • Bronchoconstriction
  • Guinea pig
  • Histamine
  • Swine
  • Vagus nerve stimulation

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology
  • Anesthesiology and Pain Medicine

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