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Neuroreport. 1998 May 11;9(7):1639-44.

Localization of glutamate receptors in dorsal horn of rat spinal cord.

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Department of Biology, Hong Kong Baptist University, Kowloon Tong, China.


Immunocytochemical localization of metabotropic glutamate receptors (mGluRs) and ionotropic glutamate receptors (NMDA-type: NMDAR1 and NMDAR2A-C; AMPA-type: GluR1-4) was performed on sections of rat dorsal horn. Immunoreactivity for mGluR1 alpha was detected in laminae I-III of the dorsal horn, whilst mGluR2/3 immunoreactivity was detected primarily in lamina III. Immunoreactivity for NMDAR1, GluR1, GluR2, GluR2/3, GluR4 and GluR5/6/7 was strongly localized in neuronal elements of laminae I-III. Immunoreactivity for NMDAR2B was localized in laminae I-III. No mGluR5, NMDAR2A and NMDAR2C immunoreactivity was detected. In addition, immunoreactivity for receptors was found to co-localize with immunoreactivity for glutamate in the dorsal horn. The present results indicate that glutamate receptors are differentially localized in neuronal elements of dorsal horn where receptor-neurotransmitter interaction takes place.

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