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EA at PC6 Promotes Gastric Motility: Role of Brainstem Vagovagal Neurocircuits
- Source :
- Evidence-based Complementary and Alternative Medicine : eCAM, Evidence-Based Complementary and Alternative Medicine, Vol 2019 (2019)
- Publication Year :
- 2019
- Publisher :
- Hindawi, 2019.
-
Abstract
- Background. We aimed to assess whether electroacupuncture (EA) at PC6 affects gastric motility via the vagovagal reflex and if so whether brainstem vagovagal neurocircuits and related transmitters are involved. Methods. Gastric motility was measured in male Sprague-Dawley (SD) rats by placing a small manometric balloon in the gastric antrum. The rats were subjected to control, sham surgery, vagotomy, sympathectomy, and microinjection group, including artificial cerebrospinal fluid, gamma-aminobutyric acid (GABA), and glutamic acid (L-Glu). The effect of EA at PC6 on gastric motility was measured. Moreover, electrophysiological testing was used to measure the effect of EA at PC6 on the parasympathetic and sympathetic nerves. In addition, artificial cerebrospinal fluid, L-Glu, and GABA have been microinjected into the dorsal motor nucleus of the vagus (DMV) to measure the changes in gastric motility and parasympathetic nerve discharge induced by EA at PC6. Key Results. EA facilitated the gastric motility in control group. In the vagotomy group, gastric motility was not affected by EA at PC6. However, in the sympathectomy group, gastric motility was similar to control group. Acupuncture at PC6 increased parasympathetic nerve discharge but not sympathetic nerve discharge. Furthermore, the microinjection of L-Glu into the DMV increased gastric motility, although EA at PC6 showed no remarkable change in this group. The injection of GABA reduced gastric motility and parasympathetic nerve discharge, but EA at PC6 significantly increased gastric motility and the parasympathetic nerve discharge in this group. Conclusions and Inferences. EA at PC6—primarily by inhibiting GABA transmission to DMV—reduced the inhibition of efferent vagal motor fibers and thus promoted efferent vagus nerve activity and increased gastric motility.
- Subjects :
- medicine.medical_specialty
Vagovagal reflex
Article Subject
business.industry
Electroacupuncture
medicine.medical_treatment
digestive, oral, and skin physiology
Gastric motility
lcsh:Other systems of medicine
lcsh:RZ201-999
Vagotomy
Vagus nerve
03 medical and health sciences
0302 clinical medicine
Endocrinology
Dorsal motor nucleus
Complementary and alternative medicine
Sympathectomy
030220 oncology & carcinogenesis
Internal medicine
Medicine
business
Microinjection
030217 neurology & neurosurgery
Research Article
Subjects
Details
- Language :
- English
- ISSN :
- 1741427X
- Database :
- OpenAIRE
- Journal :
- Evidence-Based Complementary and Alternative Medicine
- Accession number :
- edsair.doi.dedup.....28250475600e0888c1bf702fbe8803af
- Full Text :
- https://doi.org/10.1155/2019/7457485