Neuropeptide Y may participate in the pathogenesis of cervical vertigo

Abstract

Objectives: The concrete mechanism underlying the pathogenesis of cervical vertigo has not been well illustrated. This study aims to determine the diagnostic and potential therapeutic values of the neurotransmitter neuropeptide Y (NPY) in cervical vertigo. Methods: Sixty male rabbits were randomly divided into five groups: the blank control, superior cervical sympathetic ganglia (SCSG) stimulation, SCSG sham-operated control (ganglion exposure and electrode placement in SCSG), inferior cervical sympathetic ganglia (ICSG) stimulation, and ICSG sham-operated control (ganglion exposure and electrode placement in ICSG) groups. Electrical stimulation at 30.0 Hz and 10.0 V for 5 min was delivered to expose SCSG or ICSG. Immunochemistry was conducted to determine the expression levels of NPY in all cervical spinal ganglia (C1–C8) dissected immediately after electrical stimulation. Results: According to the immunohistochemical results, the blank control group only had few NPY-positive cells and was not significantly different with the sham-operated group. However, after SCSG stimulation, more NPY-positive cells in C2, C3, C4, and C5 were observed (C2 and C3 were the most evident). After ICSG stimulation, more NPY-positive cells were found in C6, C7, and C8, particularly in C6 and C7. Conclusions: The low expression of NPY in all cervical ganglia (C1–C8) can be enhanced by electrical stimulation, whereas the expression of NPY in the cervical sympathetic ganglia was not affected by mechanical stimulation. This study provided new insights into the possible relationship between the neurotransmitter NPY and the pathogenesis of cervical vertigo.

Keywords

• Neuropeptide Y
• Cervical vertigo
• Cervical spinal ganglion