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Related Experiment Videos

Ascorbate neurotoxicity in cortical cell culture.

K Hisanaga1, S M Sagar, F R Sharp

  • 1Department of Neurology, University of California, San Francisco.

Annals of Neurology
|May 1, 1992
PubMed
Summary

High levels of vitamin C (ascorbate) may harm brain cells after injury. This study found that ascorbate can inhibit protein synthesis and cause neuronal death, suggesting a pathological role in neurological diseases.

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Cell Biology

Background:

  • Ascorbate (vitamin C) functions as a neuromodulator, influencing neurotransmitter release and receptor binding.
  • Elevated extracellular ascorbate levels are observed in the brain following ischemic injury.

Purpose of the Study:

  • To investigate the effects of varying ascorbate concentrations on cultured cortical neurons and astrocytes.
  • To determine the potential pathological role of ascorbate in neurological conditions.

Main Methods:

  • Treatment of cultured cortical neurons and astrocytes with micromolar to low millimolar concentrations of ascorbate.
  • Assessment of total protein synthesis inhibition.
  • Observation of neuronal and glial cell viability and death.

Main Results:

  • Ascorbate treatment inhibited total protein synthesis in neurons.
  • Neurons exhibited late-stage cell death following ascorbate exposure.
  • Astrocytes demonstrated significantly lower vulnerability to ascorbate compared to neurons.

Conclusions:

  • Ascorbate, particularly at concentrations found after ischemic brain injury, may exacerbate neuronal and glial damage.
  • The findings suggest a potential pathological role for ascorbate in ischemic brain injury and other neurological diseases.

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