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

Cellular distributions of AMPA glutamate receptor subunits in fetal ventral mesencephalon transplants in the dopamine-depleted striatum of a rat.

To demonstrate the cellular distributions of alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionate receptor subunits (GluR1, GluR2/3, and GluR4) in the intrastriatal grafts of a rat model of Parkinson's disease, immunocytochemistry was performed in 6-hydroxydopamine rats with intrastriatal transplants of fetal ventral mesencephalon (VM). In the fetal VM (at embryonic day 15) in which the tyrosine hydroxylase ( TH) immunoreactivity was intensely observed, no GluR subunit immunoreactivity was detected. Within the intrastriatal fetal VM grafts containing TH-positive cells, a large number of cells immunoreactive for GluR1 and GluR2/3 were observed. However, the GluR1- and GluR2/3-positive cells tended to locate homogeneously within the grafts and were composed of various cell sizes and shapes, mainly medium-sized and aspiny cells. Weak GluR4-positive cells were seen in the grafts, although in some cases the staining was too faint to see any immunoreactive cells at all. Double immunostaining revealed that a part of TH-positive cells in the grafts was also immunopositive for GluR1 or GluR2/3. Both dopaminergic neurons and nondopaminergic neurons in the VM transplants appear to be modified functionally by glutamatergic afferents via various glutamate receptors, including GluR1 and GluR2/3 and, to a lesser extent, GluR4.[1]


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