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    Cancer Res. 2003 Dec 15;63(24):8573-7.

    Optic nerve glioma in mice requires astrocyte Nf1 gene inactivation and Nf1 brain heterozygosity.

    Bajenaru ML, Hernandez MR, Perry A, Zhu Y, Parada LF, Garbow JR, Gutmann DH.

    Department of Neurology, Washington University School of Medicine, St. Louis, Missouri 63110, USA.

    Whereas biallelic neurofibromatosis 1 (NF1) inactivation is observed in NF1-associated gliomas, astrocyte-restricted Nf1 conditional knockout mice do not develop gliomas. These observations suggest that NF1 glioma formation requires additional cellular or genetic conditions. To determine the effect of an Nf1 heterozygous brain environment on NF1 glioma formation, we generated Nf1+/- mice lacking Nf1 expression in astrocytes. In contrast to astrocyte-restricted Nf1 conditional knockout mice, Nf1+/- mice lacking Nf1 in astrocytes develop optic nerve gliomas. This mouse model demonstrates that Nf1+/- cells contribute to the pathogenesis of gliomas in NF1 and provides a tool for the preclinical evaluation of potential therapeutic interventions for these tumors.

    PMID: 14695164 [PubMed - indexed for MEDLINE]

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