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Lipid peroxidation and trace elements in systemic sclerosis.

Mohammed Tikly1, Kalavati Channa, Penny Theodorou

  • 1Department of Medicine, Division of Rheumatology, Chris Hani Baragwanath Hospital and University of the Witwatersrand, P.O. Berstham 2013, Johannesburg, South Africa. tiklym@medicine.wits.ac.za

Clinical Rheumatology
|October 27, 2005
PubMed
Summary

Systemic sclerosis (SSc) patients show significantly higher lipid peroxidation, indicated by malondialdehyde (MDA), and lower selenium levels compared to controls. Antioxidant therapy may be most effective early in SSc progression.

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Area of Science:

  • Biochemistry
  • Immunology
  • Dermatology

Background:

  • Oxidative stress contributes to tissue injury and fibrosis in systemic sclerosis (SSc).
  • Lipid peroxidation is a key marker of oxidative stress.
  • Antioxidant status may be compromised in SSc patients.

Purpose of the Study:

  • To investigate lipid peroxidation and trace element levels in SSc.
  • To assess the relationship between oxidative stress markers and disease characteristics.
  • To explore the implications for antioxidant therapy in SSc.

Main Methods:

  • Case-control study design.
  • Measurement of fasting plasma malondialdehyde (MDA) as a marker of lipid peroxidation.
  • Quantification of serum selenium, iron, zinc, and copper levels.

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Main Results:

  • Plasma MDA levels were approximately tenfold higher in SSc patients versus controls (p=0.00007).
  • SSc patients exhibited lower serum selenium levels (p=0.012).
  • Inverse correlation found between MDA and disease duration (r=-0.52, p=0.044); copper inversely correlated with skin score (r=-0.52, p=0.03).

Conclusions:

  • Findings confirm increased lipid peroxidation and reduced antioxidant capacity in SSc.
  • The inverse relationship between MDA and disease duration suggests potential benefits of early antioxidant intervention.
  • Trace element imbalances, specifically lower selenium, may play a role in SSc pathogenesis.