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Thiol-based antioxidants.

S M Deneke1

  • 1Division of Pulmonary Diseases/Critical Care Medicine, University of Texas Health Science Center at San Antonio 78284, USA.

Current Topics in Cellular Regulation
|June 8, 2000
PubMed
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This summary is machine-generated.

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Thiol antioxidants are crucial for cellular health, acting as buffers, chelators, and radical quenchers. Increasing thiol levels, like glutathione (GSH), enhances oxidant stress tolerance and may aid disease treatment.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Redox Biology

Background:

  • Thiol redox status is vital for protein structure, enzyme activity, and transcription factor regulation.
  • Antioxidants, including thiols, protect cells from oxidant stress through various mechanisms.
  • Cellular thiol levels, such as glutathione (GSH) and thioredoxin, are dynamically regulated in response to stress.

Purpose of the Study:

  • To review the mechanisms of thiol antioxidant action.
  • To discuss the therapeutic potential of exogenous thiols in increasing cell and tissue thiol levels.
  • To highlight considerations for selecting thiol compounds and delivery methods for therapeutic applications.

Main Methods:

  • Review of existing literature on thiol redox status and antioxidant functions.

Related Experiment Videos

  • Analysis of different classes of thiol-related compounds (e.g., GSH, N-acetylcysteine (NAC), lipoic acid, orotic acid (OTC)).
  • Discussion of in vitro, animal model, and human studies involving thiol administration.

    • Main Results:

    • Exogenous thiols can successfully increase intracellular and tissue thiol levels.
    • Elevated thiol levels correlate with enhanced tolerance to oxidant stress and potential disease prevention/treatment.
    • Potential toxic effects of excessive systemic thiol levels and perturbations in redox gradients are noted.

    Conclusions:

    • Therapeutic administration of thiols shows significant promise for managing oxidant stress-related conditions.
    • Careful selection of thiol compounds and delivery strategies is essential to maximize efficacy and minimize adverse effects.
    • Understanding thiol redox gradients is critical for optimizing therapeutic outcomes and avoiding unintended consequences.