Glutamine therapy of cystinuria.

Abstract

We studied the urinary excretion of cystine, acids, and cystine crystalluria in five patients with homozygous cystinuraia before and during oral glutamine therapy. Oral glutamine did not change the absolute urinary excretion or fractional excretion of cystine in our patients and did not significantly affect urinary pH. Cystine crystalluria was present before and during oral glutamine therapy.