Multi-Dose Safety/Pharmacodynamic Study of SEL-212/SEL-037 in Subjects With Symptomatic Gout & Elevated Blood Uric Acid

This is an open label multicenter study to evaluate the safety and tolerability of multiple doses (3 monthly IV infusions) of SEL-212 ( a combination of pegsiticase (SEL-037) and SVP-rapamycin (SEL-110)) followed by multiple doses (2 monthly IV infusions) of pegsiticase (SEL-037) alone for a total of 5 treatment cycles in subjects with symptomatic gout and hyperuricemia. Additional participants will be treated with multiple doses ( 5 monthly IV infusions) of pegsiticase (SEL-037) alone. Participants will be monitored for safety endpoints through the 5th treatment cycle plus 30 days .Pharmacokinetic samples will be drawn at pre-determined time points in addition to weekly serum uric acid levels.