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- W2079607060 endingPage "2128" @default.
- W2079607060 startingPage "2115" @default.
- W2079607060 abstract "Significance: Dysregulation of cortical and striatal neuronal processing plays a critical role in Huntington's disease (HD), a dominantly inherited condition that includes a progressive deterioration of cognitive and motor control. Growing evidence indicates that ascorbate (AA), an antioxidant vitamin, is released into striatal extracellular fluid when glutamate is cleared after its release from cortical afferents. Both AA release and glutamate uptake are impaired in the striatum of transgenic mouse models of HD owing to a downregulation of glutamate transporter 1 (GLT1), the protein primarily found on astrocytes and responsible for removing most extracellular glutamate. Improved understanding of an AA–glutamate interaction could lead to new therapeutic strategies for HD. Recent Advances: Increased expression of GLT1 following treatment with ceftriaxone, a beta-lactam antibiotic, increases striatal glutamate uptake and AA release and also improves the HD behavioral phenotype. In fact, treatment with AA alone restores striatal extracellular AA to wild-type levels in HD mice and not only improves behavior but also improves the firing pattern of neurons in HD striatum. Critical Issues: Although evidence is growing for an AA-glutamate interaction, several key issues require clarification: the site of action of AA on striatal neurons; the precise role of GLT1 in striatal AA release; and the mechanism by which HD interferes with this role. Future Directions: Further assessment of how the HD mutation alters corticostriatal signaling is an important next step. A critical focus is the role of astrocytes, which express GLT1 and may be the primary source of extracellular AA. Antioxid. Redox Signal. 19, 2115–2128." @default.
- W2079607060 created "2016-06-24" @default.
- W2079607060 creator A5040635164 @default.
- W2079607060 date "2013-12-10" @default.
- W2079607060 modified "2023-09-27" @default.
- W2079607060 title "Dysregulation of Corticostriatal Ascorbate Release and Glutamate Uptake in Transgenic Models of Huntington's Disease" @default.
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