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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Differential co-localization of neurokinin-3 receptor and NMDA/AMPA receptor subunits in neurons of the substantia nigra of C57/BL mice.

By using a double immunofluorescence method we examined co-localization of neurokinin-3 receptor (NK-3R) and N-methyl-D-aspartate (NMDA)/alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionate (AMPA) receptor subunits in neurons of the substantia nigra of adult mice. Overlapping distribution of NMDA receptor subunit 1 (NR1)/AMPA receptor subunits 1-4 (GluR1-4) and NK-3R-immunoreactive neurons were found in the substantia nigra pars compacta. It revealed that all (100%) of NK-3R-positive neurons displayed NR1, GluR2 or GluR3 immunoreactivity, 80% of them showed GluR1 immunoreactivity. In contrast, these neurons exhibiting both NK-3R and GluR4 immunoreactivity were hardly detected although GluR4-positive neurons were still distributed in the substantia nigra. The co-expression of NK-3R and NMDA/AMPA receptor subunits in the nigral neurons has provided a structural basis for functional modulation of neuronal glutamate receptors by neurokinin-3, suggesting that neurokinin peptides may be involved in modulation of neuronal properties and excitotoxicity in the substantia nigra of basal ganglia.[1]


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