Alterations in discrete glutamate receptor subunits in adult mouse dentate gyrus granule cells following perforant path transection.
Custom-designed microarray analysis was utilized to evaluate expression levels of glutamate receptors (GluRs) and GluR-interacting protein genes within isolated dentate gyrus granule cells following axotomy of the principal input, the perforant path (PP). Dentate gyrus granule cells were evaluated by microdissection via laser capture microdissection, terminal continuation RNA amplification, and microarray analysis following unilateral PP transections at seven time points. Expression profiles garnered from granule cells on the side ipsilateral to PP transections were compared and contrasted with naive subjects and mice subjected to unilateral occipital cortex lesions. Selected microarray observations were validated by real-time quantitative PCR analysis. Postlesion time-dependent alterations in specific alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptors, kainate receptors, N-methyl-D-aspartate (NMDA) receptors, and GluR-interacting protein genes were found across the time course of the study, suggesting a neuroplasticity response associated with the transsynaptic granule cell alterations following axotomy of incoming PP terminals.
Ginsberg
Stephen D
SD
Department of Psychiatry, Center for Dementia Research, Nathan Kline Institute, New York University Langone Medical Center, 140 Old Orangeburg Road, Orangeburg, NY 10962, USA. ginsberg@nki.rfmh.org
D000818:Animals; D019771:Axotomy; D002478:Cells, Cultured; D018891:Dentate Gyrus / Q000166:cytology* / Q000378:metabolism; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D019580:Perforant Pathway / Q000166:cytology / Q000378:metabolism* / Q000601:surgery*; D021122:Protein Subunits / Q000235:genetics / Q000378:metabolism; D017470:Receptors, Glutamate / Q000235:genetics / Q000378:metabolism*
D021122:Protein Subunits; D017470:Receptors, Glutamate