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Ascorbic acid (AA), the reduced form of vitamin C, is incorporated into neurons via the sodium ascorbate co-transporter SVCT2. However, this transporter is not expressed in astrocytes, which take up the oxidized form of vitamin C, dehydroascorbic acid (DHA), via the facilitative hexose transporter GLUT1. Therefore, neuron and astrocyte interactions are thought to mediate vitamin C recycling in the...
Ammonia has been strongly implicated in the pathogenesis of hepatic encephalopathy (HE), and astrocytes appear to be the primary target of ammonia neurotoxicity. Recent work has shown that manganese also plays a role in the pathogenesis of HE and causes astrocyte morphologic and functional changes similar to ammonia. We therefore investigated whether a combination of these compounds could produce...
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