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Increasing striatal iron content associated with normal aging

W R Martin1, F Q Ye, P S Allen

  • 1Department of Medicine (Neurology), University of Alberta, Edmonton, Canada.

Movement Disorders : Official Journal of the Movement Disorder Society
|April 16, 1998
PubMed
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Brain iron increases with age, particularly in the striatum. This age-related iron accumulation may heighten the risk of developing neurodegenerative diseases like Parkinson's disease due to increased free-radical damage.

Area of Science:

  • Neuroscience
  • Aging Research
  • Biochemistry

Background:

  • Free radicals contribute to neuronal damage in Parkinson's disease (PD), aging, and other neurodegenerative conditions.
  • Brain iron accumulation, catalyzed by transition metals, can increase local free-radical formation.
  • Oxidative stress is implicated in the pathogenesis of neurodegenerative disorders.

Purpose of the Study:

  • To investigate the relationship between aging and iron concentration in the basal ganglia.
  • To quantify regional brain iron content in normal individuals across a wide age range.

Main Methods:

  • Utilized an in vivo magnetic resonance imaging (MRI) technique.
  • Quantified iron content by measuring the effects of paramagnetic centers within cellular membranes.

Related Experiment Videos

  • Studied 20 healthy individuals aged 24 to 79 years.

    • Main Results:

    • A significant positive correlation was found between age and iron content in the putamen (r=0.76) and caudate nucleus (r=0.69).
    • No significant correlation between age and iron content was observed in the globus pallidus or thalamus.
    • Striatal iron levels demonstrated a marked increase with advancing age.

    Conclusions:

    • Striatal iron content increases with age in normal individuals.
    • This age-dependent increase in striatal iron may elevate the risk of free-radical-induced neuronal damage.
    • Elevated oxidant stress in the striatum could be a risk factor for neurodegenerative diseases like Parkinson's disease.