Lack of NMDA receptor subunit exchange alters Purkinje cell dendritic morphology in cerebellar slice cultures.
Early postnatal developmental changes in N-methyl-d-aspartate (NMDA) receptor (NR) subunits regulate cerebellar granule cell maturation and potentially Purkinje cell development. We therefore investigated Purkinje cell morphology in slice cultures from mice with genetic subunit exchange from NR2C to NR2B (NR2C-2B). NR2C-2B Purkinje cells after 12 days in vitro showed a significantly impaired dendritic arbour complexity with reduced branching density as compared to wild-type cells, a phenotype that was reversed by NMDA treatment. These data support the concept that in cerebellar slice cultures, Purkinje cell dendritic outgrowth is regulated by granule cell inputs.
Metzger
Friedrich
F
Anatomisches Institut I, Universität Freiburg, Germany. friedrich.metzger@roche.com
Pieri
Isabelle
I
Eisel
Ulrich L M
UL
D000818:Animals; D002452:Cell Count; D002470:Cell Survival / Q000502:physiology; D002531:Cerebellum / Q000378:metabolism* / Q000648:ultrastructure*; D003712:Dendrites / Q000378:metabolism* / Q000648:ultrastructure*; D051379:Mice; D009924:Organ Culture Techniques; D011689:Purkinje Cells / Q000378:metabolism* / Q000648:ultrastructure*; D016194:Receptors, N-Methyl-D-Aspartate / Q000378:metabolism / Q000502:physiology*
C121001:NR2B NMDA receptor; C432823:NR2C NMDA receptor; D016194:Receptors, N-Methyl-D-Aspartate