Allena Pharmaceuticals, Inc. announced clinical data from its Phase 1 trial of ALLN-346 in healthy volunteers. ALLN-346 is an investigational, orally administered, novel urate-degrading enzyme that has been designed for activity and stability in the gastrointestinal (GI) tract, and is intended for the treatment of hyperuricemia in patients with gout and chronic kidney disease (CKD). The double-blind, placebo-controlled, single-ascending dose study enrolled 24 healthy volunteers. Groups of eight study participants were randomized 3:1 to ALLN-346 or matching placebo in three sequential cohorts dosed orally with three, six, or 12 capsules in one day. Each capsule of ALLN-346 contained a target dose of 90 mg of enzyme, equivalent to 2,250 units. ALLN-346 was well-tolerated with no clinically significant safety signals and no dose-limiting toxicities observed in any cohort up to the administered dose. In addition, assay of serum samples by ELISA immunoassay demonstrated that ALLN-346 was not absorbed systemically, supporting that its mechanism of action appears to be restricted to the GI tract. Subject to feedback from the U.S. Food and Drug Administration, Allena expects to initiate a Phase 1b multiple-ascending dose trial in healthy volunteers and a Phase 2 proof-of-concept trial in patients with hyperuricemia and CKD in the first half of 2021, with initial data from both studies expected in the second half of 2021.