Autonomic and cytokine mechanisms of acute electroacupuncture in a rodent model of functional dyspepsia
NEUROGASTROENTEROLOGY AND MOTILITY(2024)
摘要
Background: Cytokines have been presumed to play an important role in the pathophysiology of functional dyspepsia (FD). Electroacupuncture (EA) has been used for FD treatment; however, its mechanisms remain largely unknown. This study aimed to (1) compare the plasma levels of cytokines, including tumor necrosis factor (TNF)-alpha, interleukin (IL)-1 beta, IL-6, and IL-10, in "FD" rats with normal control rats; (2) investigate whether EA, using chronically implanted electrodes, could inhibit the release of these cytokines; and (3) explore the correlation of cytokine levels with plasma norepinephrine (NE) levels and gastric emptying (GE).Methods: A rodent model of FD was established via neonatal treatment with intragastric iodoacetamide. After 8 weeks, the rats were implanted with electrodes at acupoint ST36 for EA. The plasma levels of cytokines and NE were measured using enzyme-linked immunosorbent assay. We explored the correlations of cytokine levels with NE levels and GE.Key Results: (i) "FD" rats demonstrated increased levels of TNF-alpha, IL-1 beta, and IL-6 (p < 0.05 each) compared with the control rats. (ii) EA significantly decreased the plasma levels of TNF-alpha, IL-1 beta, and IL-6 in "FD" rats (p < 0.05 each) compared with sham EA. (iii) The plasma levels of NE were positively correlated with those of IL-6 (r = 0.86, p < 0.05) and IL-1 beta (r = 0.81, p < 0.05), whereas NE levels and GE were negatively correlated with IL-10 levels (r = -0.870, p < 0.05 and r = -0.791, p < 0.05, respectively).Conclusions: EA inhibits the release of proinflammatory cytokines probably via the suppression of sympathetic activity in "FD" rats.
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关键词
cytokine,duodenal inflammation,electroacupuncture,functional dyspepsia,gastric emptying,norepinephrine
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