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Related Experiment Videos

Oxidative stress, antioxidants, and animal function

J K Miller1, E Brzezinska-Slebodzinska, F C Madsen

  • 1Animal Science Department, University of Tennessee, Knoxville 37901-1071.

Journal of Dairy Science
|September 1, 1993
PubMed
Summary
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Oxidative stress impairs dairy cow performance by damaging cells and disrupting metabolism. Controlling this stress requires supplying antioxidant nutrients and minimizing exposure to substances that increase reactive oxygen metabolites.

Area of Science:

  • Dairy cattle nutrition
  • Animal metabolism
  • Oxidative stress research

Background:

  • Reactive oxygen metabolites (ROMs) arise from normal metabolism and xenobiotic exposure.
  • Uncontrolled ROMs cause peroxidative damage and metabolic dysfunction in dairy cows.
  • The body possesses antioxidant systems to neutralize ROMs, including enzymatic and non-enzymatic antioxidants.

Purpose of the Study:

  • To elucidate the mechanisms by which oxidative stress impacts dairy cow performance.
  • To review the endogenous antioxidant systems protecting against oxidative damage.
  • To provide recommendations for managing oxidative stress in high-producing dairy cows.

Main Methods:

  • Literature review of oxidative stress mechanisms in dairy cattle.

Related Experiment Videos

  • Analysis of the roles of various antioxidant systems (enzymatic and non-enzymatic).
  • Examination of factors influencing reactive oxygen metabolite generation.

    • Main Results:

    • Oxidative stress directly damages cellular components via peroxidation.
    • Indirect effects include depletion of reducing equivalents and altered glucose metabolism.
    • A comprehensive range of antioxidants, including vitamins E and C, glutathione, and carotenoids, are crucial for protection.

    Conclusions:

    • Optimizing dairy cow performance necessitates effective control of oxidative stress.
    • Supplementation with essential antioxidant nutrients is vital.
    • Minimizing exposure to pro-oxidative substances is equally important for metabolic health.