The relationship between neurokinin-1 receptor and substance P in the medullary dorsal horn: A light and electron microscopic immunohistochemical study in the rat

J. Li, D. Wang, T. Kaneko, R. Shigemoto, S. Nomura, N. Mizuno, Neuroscience Research 36 (2000) 327–334.

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Abstract
The synaptic relationship between substance P (SP) and its receptor, i.e. neurokinin-1 receptor (NK1R), was examined in the superficial laminae of the caudal subnucleus of the spinal trigeminal nucleus (medullary dorsal horn; MDH) of the rat. For confocal laser-scanning microscopy, double-immunofluorescence histochemistry for NK1 and SP was performed. In electron microscopic double-immunolabeling study, immunoreactivity for NK1R was detected with the silver-intensified gold method, while immunoreactivity for SP was detected with peroxidase immunohistochemistry. SP-immunoreactive axon terminals were observed to be in synaptic (mostly asymmetric) contact with NK1R-immunoreactive neuronal profiles in lamina I and lamina IIo. Although some SP-immunoreactive axon terminals were in synaptic contact with NK1R-immunoreactive sites of plasma membranes, NK1R-immunoreactivity was observed at both synaptic and non-synaptic sites of plasma membrane. Thus, SP released from axon terminals might not only act on NK1Rs facing the SP-containing axon terminals, but also diffuse in the extracellular fluid for distances larger than the synaptic cleft to act on NK1Rs at some distances from the synaptic sites.
Publishing Year
Date Published
2000-04-01
Journal Title
Neuroscience Research
Volume
36
Issue
4
Page
327 - 334
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Li J, Wang D, Kaneko T, Shigemoto R, Nomura S, Mizuno N. The relationship between neurokinin-1 receptor and substance P in the medullary dorsal horn: A light and electron microscopic immunohistochemical study in the rat. Neuroscience Research. 2000;36(4):327-334. doi:10.1016/S0168-0102(00)00095-X
Li, J., Wang, D., Kaneko, T., Shigemoto, R., Nomura, S., & Mizuno, N. (2000). The relationship between neurokinin-1 receptor and substance P in the medullary dorsal horn: A light and electron microscopic immunohistochemical study in the rat. Neuroscience Research, 36(4), 327–334. https://doi.org/10.1016/S0168-0102(00)00095-X
Li, Jin, Dan Wang, Takeshi Kaneko, Ryuichi Shigemoto, Sakashi Nomura, and Noboru Mizuno. “The Relationship between Neurokinin-1 Receptor and Substance P in the Medullary Dorsal Horn: A Light and Electron Microscopic Immunohistochemical Study in the Rat.” Neuroscience Research 36, no. 4 (2000): 327–34. https://doi.org/10.1016/S0168-0102(00)00095-X.
J. Li, D. Wang, T. Kaneko, R. Shigemoto, S. Nomura, and N. Mizuno, “The relationship between neurokinin-1 receptor and substance P in the medullary dorsal horn: A light and electron microscopic immunohistochemical study in the rat,” Neuroscience Research, vol. 36, no. 4, pp. 327–334, 2000.
Li J, Wang D, Kaneko T, Shigemoto R, Nomura S, Mizuno N. 2000. The relationship between neurokinin-1 receptor and substance P in the medullary dorsal horn: A light and electron microscopic immunohistochemical study in the rat. Neuroscience Research. 36(4), 327–334.
Li, Jin, et al. “The Relationship between Neurokinin-1 Receptor and Substance P in the Medullary Dorsal Horn: A Light and Electron Microscopic Immunohistochemical Study in the Rat.” Neuroscience Research, vol. 36, no. 4, Elsevier, 2000, pp. 327–34, doi:10.1016/S0168-0102(00)00095-X.

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