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Synaptic plasticity in early aging.

Gary Lynch1, Christopher S Rex, Christine M Gall

  • 1Department of Psychiatry and Human Behavior, Gillespie Neuroscience Research Facility, University of California at Irvine, Irvine, CA 92697, USA. glynch@uci.edu

Ageing Research Reviews
|August 29, 2006
PubMed
Summary
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Early aging impairs long-term potentiation (LTP) in specific brain areas. Excessive negative modulation may cause these deficits, but interventions like brain-derived neurotrophic factor show promise for restoring plasticity.

Area of Science:

  • Neuroscience
  • Aging Research
  • Synaptic Plasticity

Background:

  • Aging's impact on brain plasticity is often studied in old animals.
  • Memory decline begins earlier than old age, suggesting early-onset changes.
  • Long-term potentiation (LTP) is a key mechanism of synaptic plasticity.

Purpose of the Study:

  • To investigate if impaired LTP contributes to early memory decline.
  • To identify the cellular mechanisms behind age-related LTP deficits.
  • To explore potential interventions for reversing these changes.

Main Methods:

  • Review of recent studies on LTP induction, expression, and stabilization.
  • Analysis of cellular mechanisms underlying LTP.
  • Examination of factors modulating LTP, including negative modulators and neurotrophic factors.

Related Experiment Videos

Main Results:

  • LTP impairments are observed in early middle age in rats, specifically in certain dendritic domains.
  • Cellular mechanisms for LTP are redundant and modulated by various factors.
  • Excessive activity of a negative modulator appears to cause localized LTP failure in early aging.

Conclusions:

  • Early age-related deficits in LTP are linked to excessive negative modulation.
  • Redundant and modulated substrates of LTP offer targets for reversal.
  • Brain-derived neurotrophic factor (BDNF) may reverse age-related plasticity loss with brief interventions.