Simple amino acid prodrugs of cysteamine and cystamine were synthesized to overcome the problems of palatability and gastrointestinal irritation, while γ-glutamyl prodrugs were synthesized to target the parent drug to γ-glutamyl transpeptidase (GGT). Preliminary cystine-depleting evaluation in vitro suggests further investigation is warranted. Low toxicity of the prodrugs was observed.
Keywords: Cystinosis, prodrugs, GGT, cysteamine, cystamine
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