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- W2037290785 abstract "Adult genetically obese (ob/ob) mice display a number of metabolic alterations, the primary cause of which may be a defect in their central nervous system (CNS). The protein encoded by the protooncogene c-fos, c-Fos, functions as a nuclear transcription factor, and also serves as a marker of neuronal activity. The specific objectives of this study were (1) to use c-Fos immunohistochemistry to identify regions with altered neuronal activity in 6–7 week old male lean andob/ob mice; (2) to examine c-fos relative mRNA abundance by northern blot analysis in brains of these mice and compare it with that of neuropeptide Y (NPY), a peptide well known to alter feeding and (3) determine changes in c-Fos immunoreactivity and mRNA caused by food deprivation. Fos-like immunoreactivity (FLI) tended to be higher in ad libitum fedob/ob mice than in lean controls in most brain regions examined. The most prominent and consistent differences were in the paraventricular nuclei (PVN) where the numbers of Fos-positive nuclei were approximately 3 hold higher inob/ob mice. Food deprivation for 24 h increased FLI in the PVN in lean mice but did not further augment FLI in the PVN ofob/ob mice. Arcuate nuclei of lean andob/ob mice showed minimal FLI staining under ad libitum fed conditions. Food deprivation however, induced FLI in acurate nuclei of both lean andob/ob mice. The abundance of c-fos mRNA in whole brain ofob/ob mice averaged several fold higher than in leans under both fed and fasted conditions. There was no difference in whole brain NPY mRNA between lean andob/ob mice. Prolonged stimulation of c-Fos in specific neurons ofob/ob mice including the paraventricular nucleus probably has modulatory effects on certain genes which in turn account for long term adaptive changes of theob/ob phenotype." @default.
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- W2037290785 date "1994-12-01" @default.
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- W2037290785 title "Elevated neuronal c-Fos-like immunoreactivity and messenger ribonucleic acid (mRNA) in genetically obese (ob/ob) mice" @default.
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- W2037290785 doi "https://doi.org/10.1016/0006-8993(94)90281-x" @default.
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