Reference : Hippocampal extracellular matrix levels and stochasticity in synaptic protein express...
Scientific journals : Article
Life sciences : Multidisciplinary, general & others
http://hdl.handle.net/10993/17489
Hippocampal extracellular matrix levels and stochasticity in synaptic protein expression increase with age and are associated with age-dependent cognitive decline.
English
Vegh, Marlene J. [> >]
Rausell, Antonio [> >]
Loos, Maarten [> >]
Heldring, Celine M. [> >]
Jurkowski, Wiktor mailto [University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) >]
van Nierop, Pim [> >]
Paliukovich, Iryna [> >]
Li, Ka Wan [> >]
del Sol Mesa, Antonio mailto [University of Luxembourg > Luxembourg Centre for Systems Biomedicine (LCSB) >]
Smit, August B. [> >]
Spijker, Sabine [> >]
van Kesteren, Ronald E. [> >]
2014
Molecular & cellular proteomics : MCP
Yes (verified by ORBilu)
International
1535-9476
1535-9484
[en] Aging ; Cell biology ; Cognitive decline ; Extracellular matrix ; Hippocampus ; Neurobiology ; Synapse ; Systems biology ; iTRAQ
[en] Age-related cognitive decline is a serious health concern in our aging society. Decreased cognitive function observed during healthy brain aging is most likely caused by changes in brain connectivity and synaptic dysfunction in particular brain regions. Here we show that aged C57BL/6J wildtype mice have hippocampus-dependent spatial memory impairments. To identify the molecular mechanisms that are relevant to these memory deficits we investigated the temporal profile of mouse hippocampal synaptic proteome changes at 20, 40, 50, 60, 70, 80, 90 and 100 weeks of age. Extracellular matrix proteins were the only group of proteins that showed a robust and progressive upregulation over time. This was confirmed by immunoblotting and histochemical analysis, indicating that the increased levels of hippocampal extracellular matrix may limit synaptic plasticity as a potential cause of age-related cognitive decline. In addition, we observed that stochasticity in synaptic protein expression increased with age, in particular for proteins that were previously linked with various neurodegenerative diseases, whereas low variance in expression was observed for proteins that play a basal role in neuronal function and synaptic neurotransmission. Together, our findings show that both specific changes and increased variance in synaptic protein expression are associated with aging and may underlie reduced synaptic plasticity and impaired cognitive performance at old age.
Luxembourg Centre for Systems Biomedicine (LCSB): Computational Biology (Del Sol Group)
http://hdl.handle.net/10993/17489
10.1074/mcp.M113.032086
http://www.mcponline.org/content/early/2014/07/19/mcp.M113.032086.full.pdf+html
Copyright (c) 2014, The American Society for Biochemistry and Molecular Biology.

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