Genistein in Sanfilippo disease: a randomized controlled crossover trial

Annals of Neurology
J de RuijterF A Wijburg


Sanfilippo disease (mucopolysaccharidosis type III [MPS III]) is a rare neurodegenerative metabolic disease caused by a deficiency of 1 of the 4 enzymes involved in the degradation of heparan sulfate (HS), a glycosaminoglycan (GAG). Genistein has been proposed as potential therapy but its efficacy remains uncertain. We aimed to determine the efficacy of genistein in MPS III. Thirty patients were enrolled. Effects of genistein were determined in a randomized, crossover, placebo-controlled intervention with a genistein-rich soy isoflavone extract (10mg/kg/day of genistein) followed by an open-label extension study for patients who were on genistein during the last part of the crossover. Genistein resulted in a significant decrease in urinary excretion of total GAGs (p = 0.02, slope -0.68 mg GAGs/mmol creatinine/mo) and in plasma concentrations of HS (p = 0.01, slope -15.85 ng HS/ml/mo). No effects on total behavior scores or on hair morphology were observed. Parents or caregivers could not predict correctly during which period of the crossover a patient was on genistein. Genistein at 10mg/kg/day effectively reduces urinary excretion of GAGs and plasma HS concentration in patients with MPS III. However, the absolute reduction in G...Continue Reading


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