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• W1994287251 abstract "The expression pattern of six different immediate early gene-encoded proteins was examined in the rat forebrain after intraperitoneal administration of MK-801, a non-competitive N-methyl-d-aspartate receptor antagonist, at doses of 3 mg/kg and 0.3 mg/kg, respectively. Following MK-801 treatment, the presence of c-FOS, FOS B, KROX-24, c-JUN, JUN B, and JUN D were investigated by immunocytochemistry with specific antisera at different time intervals up to 48 h. Selective induction of all six immediate early genes was found in layer III neurons of the posterior cingulate and retrosplenial cortex. More complex effects were observed in the neocortex: MK-801 did not influence constitutive expression of different FOS and JUN proteins, but caused marked induction of c-FOS, FOS B, JUN B and JUN D, mainly in layer IV, but also in layers V and VI. In contrast, strong neocortical constitutive expression of KROX-24 was almost abolished by MK-801 administration, and replaced by an expression pattern similar to that of FOS and JUN proteins. Subcortical areas such as the hypothalamus and thalamus demonstrated an induction of a subset of immediate early genes (c-fos, fos B, Krox-24, jun B). Injection of MK-801 caused the same distributional pattern of immediate early gene expression irrespective of the dose given, but the extent of changes was stronger after 3 mg/kg, and altered levels of immunoreactivity persisted longer. In many experimental paradigms, immediate early genes are induced by N-methyl-d-aspartate receptor-mediated mechanisms. This induction can readily be blocked by N-methyl-d-aspartate receptor antagonists like MK-801. Our data, however, indicate that MK-801 itself causes immediate early gene expression in specific neuronal populations. In the present study MK-801-elicited expression of immediate early gene-encoded proteins seems to identify reversibly injured neurons, mainly in layer III of the posterior cingulate and retrosplenial cortex. These neurons have previously been shown to be the principal target of N-methyl-d-aspartate receptor antagonist toxicity. Since immediate early gene induction precedes heat-shock protein expression as well as pathomorphological changes, and is induced in additional cortical cell populations, it seems to be a more rapid and more sensitive indicator of non-lethal neuronal injury." @default.
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• W1994287251 date "1993-04-01" @default.
• W1994287251 modified "2023-09-27" @default.
• W1994287251 title "Induction and suppression of immediate early genes in specific rat brain regions by the non-competitive N-methyl-d-aspartate receptor antagonist MK-801" @default.
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• W1994287251 doi "https://doi.org/10.1016/0306-4522(93)90621-l" @default.
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