Age-related changes in hippocampal-dependent synaptic plasticity and memory mediated by p75 neurotrophin receptor.

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    • Source:
      Publisher: Wiley-Blackwell Country of Publication: England NLM ID: 101130839 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1474-9726 (Electronic) Linking ISSN: 14749718 NLM ISO Abbreviation: Aging Cell Subsets: MEDLINE
    • Publication Information:
      Publication: Oxford, UK : Wiley-Blackwell
      Original Publication: Oxford, UK : Blackwell Pub., c2002-
    • Subject Terms:
    • Abstract:
      The plasticity mechanisms in the nervous system that are important for learning and memory are greatly impacted during aging. Notably, hippocampal-dependent long-term plasticity and its associative plasticity, such as synaptic tagging and capture (STC), show considerable age-related decline. The p75 neurotrophin receptor (p75 NTR ) is a negative regulator of structural and functional plasticity in the brain and thus represents a potential candidate to mediate age-related alterations. However, the mechanisms by which p75 NTR affects synaptic plasticity of aged neuronal networks and ultimately contribute to deficits in cognitive function have not been well characterized. Here, we report that mutant mice lacking the p75 NTR were resistant to age-associated changes in long-term plasticity, associative plasticity, and associative memory. Our study shows that p75 NTR is responsible for age-dependent disruption of hippocampal homeostatic plasticity by modulating several signaling pathways, including BDNF, MAPK, Arc, and RhoA-ROCK2-LIMK1-cofilin. p75 NTR may thus represent an important therapeutic target for limiting the age-related memory and cognitive function deficits.
      (© 2021 The Authors. Aging Cell published by the Anatomical Society and John Wiley & Sons Ltd.)
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    • Contributed Indexing:
      Keywords: Late-LTP; aging; hippocampus; p75NTR; synaptic capture; synaptic tagging
    • Accession Number:
      0 (Receptors, Nerve Growth Factor)
      0 (Ngfr protein, mouse)
    • Publication Date:
      Date Created: 20210115 Date Completed: 20210906 Latest Revision: 20231213
    • Publication Date:
      20231215
    • Accession Number:
      PMC7884039
    • Accession Number:
      10.1111/acel.13305
    • Accession Number:
      33448137