期刊
BRAIN BEHAVIOR AND IMMUNITY
卷 73, 期 -, 页码 441-449出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.bbi.2018.06.005
关键词
Lipopolysaccharide (LPS); Vagus nerve; Vagus nerve stimulation; Sympathetic nervous system; Splanchnic anti-inflammatory pathway; Inflammation; Tumor necrosis factor alpha (TNF); Interleukin 10 (IL-10); Endotoxemia; Greater splanchnic nerve
资金
- National Health and Medical Research Council (NHMRC) of Australia [1098887]
- Victorian Government Operational Infrastructure Support Program
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo [FAPESP 2016/1555-6]
- National Health and Medical Research Council of Australia [1098887] Funding Source: NHMRC
Electrical stimulation of the vagus nerve (VNS) is a novel strategy used to treat inflammatory conditions. Therapeutic VNS activates both efferent and afferent fibers; however, the effects attributable to vagal afferent stimulation are unclear. Here, we tested if selective activation of afferent fibers in the abdominal vagus suppresses systemic inflammation. In urethane-anesthetized rats challenged with lipopolysaccharide (LPS, 60 mu g/kg, i.v.), abdominal afferent VNS (2 Hz for 20 min) reduced plasma tumor necrosis factor alpha (TNF) levels 90 min later by 88% compared with unmanipulated animals. Pre-cutting the cervical vagi blocked this anti-inflammatory action. Interestingly, the surgical procedure to expose and prepare the abdominal vagus for afferent stimulation ('vagal manipulation') also had an anti-inflammatory action. Levels of the anti-inflammatory cytokine IL-10 were inversely related to those of TNF. Prior bilateral section of the splanchnic sympathetic nerves reversed the anti-inflammatory actions of afferent VNS and vagal manipulation. Sympathetic efferent activity in the splanchnic nerve was shown to respond reflexly to abdominal vagal afferent stimulation. These data demonstrate that experimentally activating abdominal vagal afferent fibers suppresses systemic inflammation, and that the efferent neural pathway for this action is in the splanchnic sympathetic nerves.
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