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In 40 cataract patients and in 51 patients without pseudoexfoliation (PES) we determined serum concentrations of neopterin, kynurenine, and selenium and concentrations of neopterin in aqueous humour from the anterior chamber of the eye. In addition, selenium content in lenses was determined. Significantly increased kynurenine and neopterin concentrations in serum and neopterin concentrations in aqueous humour were observed in mature cataract patients with PES compared to those without. These patients also presented with the lowest content of selenium in serum and lens, compared with cataract patients without PES. Increased concentrations of neopterin in serum and aqueous humour of the anterior chamber of eyes suggest an increased degree of oxidative stress in patients with PES. Thus, the results support the role of oxidative stress in the development of PES in cataract patients. The decreased content of selenium may elicit immune system activation via an increased oxidative stress as it is indicated by the increased formation of kynurenine and neopterin.

Neopterin and kynurenine concentrations in aqueous humour of the anterior chamber of the eye and in serum of cataract patients with pseudoexfoliation