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Regional hypomyelination and dysplasia in transgenic mice with astrocyte-directed expression of interferon-γ

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Abstract

Interferon-gamma (IFN-γ), traditionally associated with a variety of physiological and pathological processes of the immune system, manifests an array of biological effects on cells of the nervous system. Clinical and in vitro studies support a key role for IFN-γ in the pathogenesis of immune-mediated demyelinating disorders such as multiple sclerosis (MS). To investigate the role of this cytokine within the central nervous system (CNS), transgenic mice were derived in which IFN-γ transgene expression was selectively targeted to astrocytes, a potentially important cellular source of this cytokine. Here we report that astrocyte-directed expression of IFN-γ results in regional hypomyelination and selective disruption of brain histogenesis, which included severe cerebellar and hippocampal dysplasia. Transgenic mice were markedly ataxic and the majority died prior to reaching sexual maturity. This study demonstrates that astrocyte-directed expression of IFN-γ profoundly affects the differentiation and morphogenesis of the brain and provides additional evidence that this cytokine has deleterious consequences on myelin-producing cells, independent of the cellular source.

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Authors and Affiliations

  1. Department of Neurobiology and Behavior, University of California, Irvine, 1109 Gillespie Neuroscience Research Facility, 92697-4545, Irvine, CA

    Frank M. LaFerla, Michael C. Sugarman & Malcolm A. Leissring

  2. Department of Molecular Biology and Biochemistry, University of California, Irvine, 1109 Gillespie Neuroscience Research Facility, 92697-4545, Irvine, CA

    Thomas E. Lane

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  1. Frank M. LaFerla
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  2. Michael C. Sugarman
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  3. Thomas E. Lane
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  4. Malcolm A. Leissring
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Correspondence to Frank M. LaFerla.

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LaFerla, F.M., Sugarman, M.C., Lane, T.E. et al. Regional hypomyelination and dysplasia in transgenic mice with astrocyte-directed expression of interferon-γ. J Mol Neurosci 15, 45–59 (2000). https://doi.org/10.1385/JMN:15:1:45

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  • DOI: https://doi.org/10.1385/JMN:15:1:45

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