Abstract
The facilitative glucose transporter-3 (GLUT 3) and hexokinase I were examined in postnatal mouse brains using immunohistochemical methods. GLUT 3 demonstrated a polarized distribution limited to neuronal processes of most anatomical regions except the suprachiasmatic nucleus and the cerebellum, where GLUT 3 expression was limited to neuronal cell somata. In contrast, hexokinase I was observed in the cytoplasm of neuronal and non-neuronal (subependymal and choroid plexus epithelial) cell bodies in all regions. In general, while the spatial distribution of GLUT 3 and hexokinase I did not change with age, a temporal increase in intensity was noted in all regions except for the decline in suprachiasmatic nuclear GLUT 3 immunoreactivity.
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