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Patrick W Mufarrij, Jessica N Lange, John Knight, Dean G Assimos, Ross P Holmes
UNLABELLED: Abstract Background and Purpose: Urinary oxalate excretion influences the development of calcium oxalate kidney stones. Urinary oxalate is derived from dietary sources and endogenous synthesis. Oxalate decarboxylase metabolizes oxalate and, if consumed, could theoretically accomplish this in the gastrointestinal tract. This study aimed to determine whether a commercially produced form of oxalate decarboxylase (Oxazyme(®)) could degrade oxalate in simulated gastric and intestinal environments...
March 2013: Journal of Endourology
Aaron B Cowley, Duane W Poage, Robin R Dean, Carol L Meschter, Majid Ghoddusi, Qing-Shan Li, Harmeet Sidhu
Oxazyme (OC4) is an orally administered formulation that has as an active component a recombinant mutant form of Bacillus subtilis oxalate decarboxylase (OxDC) enzyme C383S, designed to degrade dietary oxalate in the stomach. Fourteen-day repeat-dose studies were conducted in rats and dogs to evaluate toxicity and determine a no observed adverse effect level (NOAEL). Animals were administered OC4 by oral gavage twice daily for 14 consecutive days. Reversibility, progression, and delayed appearance of any observed changes were evaluated in a subset of animals that underwent a recovery of 7 days following 14 days of control or test-article...
January 2010: International Journal of Toxicology
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