Puberty marks major changes in the hippocampal and cortical c-Fos activation pattern induced by NMDA receptor antagonists

Non-selective and subunit (GluN2B)-specific N-methyl-d-aspartate receptor (NMDAR) antagonists represent promising alternative antidepressant drugs with fast onset of the therapeutic action. The neuronal activation pattern induced by NMDAR antagonists is well characterized by c-Fos expression analysi...

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Main Authors: Inta, Ioana (Author) , Sprengel, Rolf (Author) , Bettendorf, Markus (Author) , Inta, Dragos (Author) , Gass, Peter (Author)
Format: Article (Journal)
Language:English
Published: January 2017
In: Neuropharmacology
Year: 2017, Volume: 112, Pages: 181-187
ISSN:1873-7064
DOI:10.1016/j.neuropharm.2016.03.023
Online Access:Verlag, Volltext: http://dx.doi.org/10.1016/j.neuropharm.2016.03.023
Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0028390816300958
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Author Notes:Ioana Inta, Emese Domonkos, Natascha Pfeiffer, Rolf Sprengel, Markus Bettendorf, Undine E. Lang, Dragos Inta, Peter Gass

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520 |a Non-selective and subunit (GluN2B)-specific N-methyl-d-aspartate receptor (NMDAR) antagonists represent promising alternative antidepressant drugs with fast onset of the therapeutic action. The neuronal activation pattern induced by NMDAR antagonists is well characterized by c-Fos expression analysis only in the adult rodent brain. In contrast, there is little information available regarding their effects during postnatal development. Here we performed a systematic c-Fos brain mapping of the non-selective NMDAR antagonist MK-801 and the GluN2B-specific antagonist Ro 25-6981 from postnatal day 16 (P16) to P40. We found significant regional differences with gender-specificity in the activation pattern compared to the adult. Surprisingly, in the hippocampus, MK-801 triggered at pre-pubertal stages (especially at P24) very strong c-Fos expression, followed by low levels after P30, the approximate time point of puberty onset in mice. The cortical distribution of MK-801-triggered c-Fos expression before puberty differed also substantially from the adult brain, showing high levels only in deep cortical layers at pre-pubertal stages. In comparison, the cortical activation induced by Ro 25-6981 diminished from high pre-pubertal levels and was in comparison with that triggered by MK-801 low in the hippocampus. These results reveal highly dynamic changes in the c-Fos activation pattern induced by NMDAR antagonists during puberty. This article is part of the Special Issue entitled ‘Ionotropic glutamate receptors’. 
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