Glucose induced IEG expression in the thiamin-deficient rat brain
Glucose loading of rats made thiamin deficient by dietary deprivation of thiamin and the administration of pyrithiamin (40 μg/100 g, i.p.) precipitates an acute neuropathy, a model of Wernicke’s encephalopathy in man (Zimitat and Nixon, Metab. Brain Dis. 1999;14:1–20). Immunohistochemical detection...
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Published in | Brain research Vol. 892; no. 1; pp. 218 - 227 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
London
Elsevier B.V
16.02.2001
Amsterdam Elsevier New York, NY |
Subjects | |
Online Access | Get full text |
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Summary: | Glucose loading of rats made thiamin deficient by dietary deprivation of thiamin and the administration of pyrithiamin (40 μg/100 g, i.p.) precipitates an acute neuropathy, a model of Wernicke’s encephalopathy in man (Zimitat and Nixon, Metab. Brain Dis. 1999;14:1–20). Immunohistochemical detection of Fos proteins was used as a marker to identify neuronal populations in the thiamin-deficient rat brain affected by glucose loading. As thiamin deficiency progressed, the extent and intensity of Fos-like immunoreactivity (FLI) in brain structures typically affected by thiamin deficiency (the thalamus, mammillary bodies, inferior colliculus, vestibular nucleus and inferior olives) were markedly increased when compared to thiamin-replete controls. Glucose loading for 1–3 days further increased the intensity of FLI in these same regions, consistent with a dependence of Fos expression on carbohydrate metabolism as well as on thiamin deficiency. The timed acute changes that follow a bolus glucose load administered to thiamin-deficient animals may provide a sequential account of events in the pathogenesis of brain damage in this model of Wernicke’s encephalopathy. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0006-8993 1872-6240 |
DOI: | 10.1016/S0006-8993(00)03297-2 |