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Related Experiment Videos

Glutamate transporters in platelets: EAAT1 decrease in aging and in Alzheimer's disease.

Chiara Zoia1, Tiziana Cogliati, Elena Tagliabue

  • 1Department of Neuroscience and Biomedical Technology, University of Milano-Bicocca, 20052 (Mi), Monza, Italy.

Neurobiology of Aging
|January 30, 2004
PubMed
Summary

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Platelets clear glutamate via transporters, but uptake decreases with aging and Alzheimer's disease (AD). This reduction is linked to lower expression of the EAAT1 glutamate transporter, suggesting platelets may serve as biomarkers for neurological conditions.

Area of Science:

  • Neuroscience
  • Biochemistry
  • Hematology

Background:

  • Platelets play a role in clearing glutamate from the blood, similar to brain synaptosomes.
  • Reduced platelet glutamate uptake is observed in neurodegenerative disorders.
  • Platelets express glutamate transporters EAAT1, EAAT2, and EAAT3.

Purpose of the Study:

  • To characterize platelet glutamate transporters morphologically and molecularly.
  • To investigate the role of platelet glutamate transporters in aging and Alzheimer's disease (AD).
  • To explore the potential of platelet glutamate transporters as peripheral markers for neuropsychiatric disorders.

Main Methods:

  • Morphological and molecular characterization of platelet glutamate transporters.
  • Analysis of glutamate uptake kinetics and inhibition.

Related Experiment Videos

  • Measurement of EAAT1 expression and mRNA levels in platelets from aging individuals and AD patients.

    • Main Results:

    • Platelets express EAAT1, EAAT2, and EAAT3, albeit at lower densities than in the brain.
    • Platelet glutamate uptake V(max) decreases with aging, linked to reduced EAAT1 expression.
    • Alzheimer's disease patients show further EAAT1 reduction compared to age-matched controls.

    Conclusions:

    • Platelet glutamate uptake is impaired in aging and significantly reduced in Alzheimer's disease, primarily due to decreased EAAT1.
    • Platelet glutamate transporters, particularly EAAT1, may serve as valuable peripheral biomarkers for studying glutamate's role in neuropsychiatric conditions.