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Sökning: WFRF:(Brene S)

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  • Karlen, A, et al. (författare)
  • Nogo receptor 1 regulates formation of lasting memories
  • 2009
  • Ingår i: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences. - 1091-6490. ; 106:48, s. 20476-20481
  • Tidskriftsartikel (refereegranskat)abstract
    • Formation of lasting memories is believed to rely on structural alterations at the synaptic level. We had found that increased neuronal activity down-regulates Nogo receptor-1 (NgR1) in brain regions linked to memory formation and storage, and postulated this to be required for formation of lasting memories. We now show that mice with inducible overexpression of NgR1 in forebrain neurons have normal long-term potentiation and normal 24-h memory, but severely impaired month-long memory in both passive avoidance and swim maze tests. Blocking transgene expression normalizes these memory impairments. Nogo, Lingo-1, Troy, endogenous NgR1, and BDNF mRNA expression levels were not altered by transgene expression, suggesting that the impaired ability to form lasting memories is directly coupled to inability to down-regulate NgR1. Regulation of NgR1 may therefore serve as a key regulator of memory consolidation. Understanding the molecular underpinnings of synaptic rearrangements that carry lasting memories may facilitate development of treatments for memory dysfunction.
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  • Werme, M, et al. (författare)
  • Running increases ethanol preference
  • 2002
  • Ingår i: Behavioural brain research. - : Elsevier BV. - 0166-4328. ; 133:2, s. 301-308
  • Tidskriftsartikel (refereegranskat)
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  • Aaberg, E, et al. (författare)
  • The role of neurogenesis in alcoholism
  • 2003
  • Ingår i: NORDIC JOURNAL OF PSYCHIATRY. - 0803-9488. ; 57:2, s. 94-94
  • Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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  • Brene, S, et al. (författare)
  • Running is rewarding and antidepressive
  • 2007
  • Ingår i: Physiology & behavior. - : Elsevier BV. - 0031-9384. ; 92:1-2, s. 136-140
  • Tidskriftsartikel (refereegranskat)
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  • Counter, S Allen, et al. (författare)
  • MRI evidence of endolymphatic impermeability to the gadolinium molecule in the in vivo mouse inner ear at 9.4 tesla
  • 2013
  • Ingår i: The Open Neuroimaging Journal. - : Bentham Science Publishers Ltd.. - 1874-4400. ; 7, s. 27-31
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE:Previous in vivo experimental magnetic resonance imaging (MRI) investigations of the mammalian inner ear at 4.7 Tesla have indicated that intravenously injected gadolinium (Gd) penetrates the perilymphatic labyrinth, but not the endolymphatic membranous labyrinth. In the present study, high field MRI at 9.4T was used to visualize the in vivo mouse vestibulo-cochlea system, and to determine whether the endolymphatic system is permeable to a Gd complex.METHODS:A 9.4 T Varian magnet equipped with a 12 cm inner diameter gradient system with maximum gradient strength of 600 mT/m, a millipede coil (Varian design) and a Gd contrast agent were used for image acquisition in the normal C57 BL-6 mouse.RESULTS:High-resolution 2D and 3D images of the mouse cochlea were acquired within 80 minutes following intravenous injection of Gd. Gd initially permeated the perilymphatic scala tympani and scala vestibuli, and permitted visualization of both cochlear turns from base to apex. The superior, inferior and lateral semicircular canals were subsequently visualized in 3 planes. The membranous endolymphatic labyrinth was impermeable to intravenously injected Gd, and thus showed no apparent uptake of Gd at 9.4T.CONCLUSION:The 9.4T field strength MRI permitted acquisition of high resolution images of anatomical and physiological features of the normal, wild type mouse perilymphatic inner ear in vivo, and provided further evidence that the endolymphatic system is impermeable to intravenously injected Gd.
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  • Jonsson, E, et al. (författare)
  • Schizophrenia and neurotrophin-3 alleles
  • 1997
  • Ingår i: Acta psychiatrica Scandinavica. - : Wiley. - 0001-690X .- 1600-0447. ; 95:5, s. 414-419
  • Tidskriftsartikel (refereegranskat)
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  • Melas, P. A., et al. (författare)
  • Allele-specific programming of Npy and epigenetic effects of physical activity in a genetic model of depression
  • 2013
  • Ingår i: Translational Psychiatry. - : Springer Science and Business Media LLC. - 2158-3188. ; 3, s. e255-
  • Tidskriftsartikel (refereegranskat)abstract
    • Neuropeptide Y (NPY) has been implicated in depression, emotional processing and stress response. Part of this evidence originates from human single-nucleotide polymorphism (SNP) studies. In the present study, we report that a SNP in the rat Npy promoter (C/T; rs105431668) affects in vitro transcription and DNA-protein interactions. Genotyping studies showed that the C-allele of rs105431668 is present in a genetic rat model of depression (Flinders sensitive line; FSL), while the SNP's T-allele is present in its controls (Flinders resistant line; FRL). In vivo experiments revealed binding of a transcription factor (CREB2) and a histone acetyltransferase (Ep300) only at the SNP locus of the FRL. Accordingly, the FRL had increased hippocampal levels of Npy mRNA and H3K18 acetylation; a gene-activating histone modification maintained by Ep300. Next, based on previous studies showing antidepressant-like effects of physical activity in the FSL, we hypothesized that physical activity may affect Npy's epigenetic status. In line with this assumption, physical activity was associated with increased levels of Npy mRNA and H3K18 acetylation. Physical activity was also associated with reduced mRNA levels of a histone deacetylase (Hdac5). Conclusively, the rat rs105431668 appears to be a functional Npy SNP that may underlie depression-like characteristics. In addition, the achieved epigenetic reprogramming of Npy provides molecular support for the putative effectiveness of physical activity as a non-pharmacological antidepressant.
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  • Resultat 1-50 av 66

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