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Pseudoexfoliation syndrome and trace elements.

Zuhal Yildirim1, N Irem Uçgun, Nedret Kiliç

  • 1Gazi University, Faculty of Medicine, Department of Medical Biochemistry, 06510 Beşevler, Ankara, Turkey. zyildirim2004@yahoo.com

Annals of the New York Academy of Sciences
|April 27, 2007
PubMed
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Pseudoexfoliation syndrome is linked to lower zinc levels in the eye lens, suggesting oxidative stress plays a role. Copper levels showed no significant difference in this study of cataract patients.

Area of Science:

  • Ophthalmology
  • Trace Element Research
  • Oxidative Stress Studies

Background:

  • Pseudoexfoliation (PSX) syndrome is a common cause of cataracts.
  • The role of trace elements like zinc and copper in PSX pathogenesis is not fully understood.

Purpose of the Study:

  • To investigate the association between zinc and copper concentrations in the lens and the presence of pseudoexfoliation syndrome.

Main Methods:

  • Atomic absorption spectrophotometry was used to measure zinc and copper levels in eye lenses.
  • Lenses were obtained from cataract patients with (n=34) and without (n=27) PSX syndrome.
  • Patient groups were matched for age and gender.

Main Results:

  • Significantly lower mean zinc concentrations were found in lenses from patients with PSX syndrome compared to those without (P < 0.05).

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  • Mean copper concentrations in the lens did not differ significantly between patients with and without PSX syndrome.
  • Lower zinc levels may contribute to increased oxidative stress.

    • Conclusions:

    • The findings support a role for oxidative stress in the development of pseudoexfoliation syndrome in cataract patients.
    • Reduced zinc content in the lens is a potential contributing factor to PSX.