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  • Title: Metabolism and serum levels of tryptophan in senile cataract patients.
    Author: Costa C, Angi MR, De Carli M, Vanzan S, Allegri G.
    Journal: Boll Soc Ital Biol Sper; 1982 Mar 30; 58(6):333-9. PubMed ID: 7082472.
    Abstract:
    In order to clarify the role of tryptophan in the patogenesis of senile cataract, we have studied the serum total and free levels of tryptophan in cataract patients as compared with age and sex-matched controls, and the urinary excretion of 10 metabolites after oral load of the amino acid. This excretion increases in the cataract group both as total per cent and as kynurenine. No difference has been found in the free and total serum tryptophan between normal subjects and cataract patients. A possible role of the kynurenines in the pathogenesis of senile cataract is suggested.
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