Previous papers examined lipid peroxidase levels and myeloperoxidase activity as products of oxidative and inflammatory reactions in the tear fluid of patients suffering from dry eye. The aim of the present paper was to investigate whether the enzymes xanthine oxidoreductase/xanthine oxidase known to generate reactive oxygen species contribute to oxidative reactions on the ocular surface. Xanthine oxidoreductase/xanthine oxidase were examined immunohistochemically as well as histochemically in conjunctival epithelial cells of patients suffering from dry eye. Patients with verified autoimmune dry eye (Sjögren's syndrome) participated in our study; normal eyes served as controls. Conjunctival epithelial cells were obtained by the method of impression cytology using Millicell membranes. The results revealed a pronounced expression, as well as activity of xanthine oxidoreductase/xanthine oxidase in the conjunctival epithelium of dry eye. It is suggested that reactive oxygen species which are generated by this enzymatic system, contribute to oxidative reactions on the eye surface of patients with ocular manifestations of autoimmune disease (Sjögren's syndrome).
- MeSH
- dospělí MeSH
- epitelové buňky enzymologie metabolismus MeSH
- financování organizované MeSH
- fluorescein MeSH
- fluorescenční barviva MeSH
- histocytochemie MeSH
- imunohistochemie MeSH
- konjunktiva cytologie metabolismus MeSH
- lidé středního věku MeSH
- lidé MeSH
- oxidace-redukce MeSH
- Sjögrenův syndrom komplikace metabolismus patologie MeSH
- slzy metabolismus MeSH
- stupeň závažnosti nemoci MeSH
- syndromy suchého oka diagnóza metabolismus patologie MeSH
- xanthinoxidasa metabolismus MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- srovnávací studie MeSH
