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Related Experiment Videos

Vitamin C prevents oxidative damage

M K Ghosh1, D J Chattopadhyay, I B Chatterjee

  • 1Dr. B.C. Guha Centre for Genetic Engineering & Biotechnology, University College of Science, Calcutta, India.

Free Radical Research
|August 1, 1996
PubMed
Summary
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Vitamin C deficiency causes significant oxidative damage to proteins and lipids in guinea pig tissues. Ascorbate therapy effectively reverses this damage, highlighting vitamin C's protective role in health.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Nutritional Science

Background:

  • Ascorbate (vitamin C) is a crucial antioxidant.
  • Microsomal membranes are susceptible to oxidative damage.
  • Oxidative stress is implicated in various degenerative diseases.

Purpose of the Study:

  • To investigate the effects of ascorbate deficiency on guinea pig tissue microsomes.
  • To determine the role of ascorbate in preventing oxidative damage to proteins and lipids.
  • To assess the efficacy of ascorbate therapy in reversing oxidative damage.

Main Methods:

  • Guinea pigs were subjected to ascorbate deficiency.
  • Protein and lipid oxidative damage were assessed using SDS-PAGE, carbonyl and bityrosine assays, tryptophan analysis, and lipid peroxidation markers (conjugated dienes, malondialdehyde, fluorescent pigment).

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  • Effects of ascorbate and vitamin E therapy were evaluated.

    • Main Results:

    • Ascorbate deficiency caused significant protein oxidation and loss, evidenced by carbonyl and bityrosine accumulation and tryptophan degradation.
    • Lipid peroxidation, indicated by conjugated dienes and malondialdehyde, increased in deficient microsomes.
    • Ascorbate therapy reversed both protein and lipid oxidative damage, while vitamin E did not affect lipid peroxides.

    Conclusions:

    • Ascorbate deficiency induces substantial oxidative damage to microsomal proteins and lipids.
    • Ascorbate therapy effectively mitigates oxidative damage, suggesting a critical role for vitamin C in preventing cellular degradation.
    • Vitamin C may offer protection against degenerative diseases linked to oxidative stress and is vital for health maintenance.