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    Neuroscience. 2006 Nov 3;142(4):1145-61. Epub 2006 Sep 25.

    Bacterial artificial chromosome transgenic analysis of dynamic expression patterns of regulator of G-protein signaling 4 during development. I. Cerebral cortex.

    Ebert PJ, Campbell DB, Levitt P.

    Source

    Department of Pharmacology, Vanderbilt University School of Medicine, 465 21st Avenue South, MRB III, Room 8114, Nashville, TN 37232, USA. Philip.Ebert@Vanderbilt.edu

    Abstract

    Signaling through G-protein-coupled receptors is modulated by a family of regulator of G protein signaling (RGS) proteins that have been implicated in several neurological and psychiatric disorders. Defining the detailed expression patterns and developmental regulation of RGS proteins has been hampered by an absence of antibodies useful for mapping. We have utilized bacterial artificial chromosome (BAC) methods to create transgenic mice that express GFP under the control of endogenous regulator of G-protein signaling 4 (RGS4) enhancer elements. This report focuses on expression patterns in the developing and mature cerebral cortex. Based on reporter distribution, RGS4 is expressed by birth in neurons across all cortical domains, but in different patterns that suggest region- and layer-specific regulation. Peak expression typically occurs before puberty, with complex down-regulation by adulthood. Deep and superficial neurons, in particular, vary in their patterns across developmental age and region and, in primary sensory cortices, layer IV neurons exhibit low or no expression of the GFP reporter. These data suggest that altering RGS4 function will produce a complex neuronal phenotype with cell- and subdomain-specificity in the cerebral cortex.

    PMID:
    16996696
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC1780259
    Free PMC Article

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