Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Horwath-Winter, J; Kirchengast, S; Meinitzer, A; Wachswender, C; Faschinger, C; Schmut, O.
Determination of uric acid concentrations in human tear fluid, aqueous humour and serum.
Acta Ophthalmol. 2009; 87(2): 188-192.
Doi: 10.1111/j.1755-3768.2008.01215.x
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- Führende Autor*innen der Med Uni Graz
- Horwath-Winter Jutta
- Co-Autor*innen der Med Uni Graz
- Meinitzer Andreas
- Schmut Otto
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- Abstract:
- The aim of this investigation was to assess and compare levels of uric acid in human tear fluid, aqueous humour and serum in cataract patients in order to obtain information about uric acid-dependent antioxidative status. Reflex tear fluid, aqueous humour and serum were obtained from 103 cataract patients (52 women, 51 men). Uric acid was determined by a reversed phase chromatographic method with electrochemical detection. The Randox test was used to measure the contribution of uric acid to the total antioxidative status (TAS) of these body fluids. Mean concentrations of uric acid were 20 +/- 8 mu g/ml in tear fluid, 18 +/- 6 mu g/ml in aqueous humour and 58 +/- 15 mu g/ml in serum. Significantly less uric acid was found in tear fluid (p < 0.01) and aqueous humour (p < 0.01) in female cataract patients compared with male cataract patients. There was a significant positive correlation between uric acid content in tear fluid, aqueous humour and serum, respectively (p < 0.01). The contribution of uric acid to TAS (Randox test) amounted to 38% in tear fluid, 10% in aqueous humour and 37% in serum. Uric acid was found in comparable amounts in tear fluid and aqueous humour, but these were two- to threefold lower than in serum. Female cataract patients had lower uric acid values in tear fluid and aqueous humour compared with male cataract patients. Uric acid is an important antioxidant, as proven by its contribution to TAS as determined by the Randox test. The precise role of uric acid in the antioxidative reactions in tear fluid and aqueous humour is still under debate.
- Find related publications in this database (using NLM MeSH Indexing)
- Aged -
- Aged, 80 and over -
- Antioxidants - analysis
- Aqueous Humor - chemistry
- Cataract - blood
- Chromatography, High Pressure Liquid -
- Female -
- Humans -
- Male -
- Osmolar Concentration -
- Sex Factors -
- Tears - chemistry
- Uric Acid - analysis
- Find related publications in this database (Keywords)
- antioxidative status
- aqueous humour
- serum
- tear fluid
- uric acid