Safety, Tolerability, and Pharmacokinetics of UX053 in Patients With Glycogen Storage Disease Type III (GSD III)
Glycogen Storage Disease Type III
About this trial
This is an interventional treatment trial for Glycogen Storage Disease Type III
Eligibility Criteria
Key Inclusion Criteria:
- Confirmed diagnosis of GSD III by gene sequencing or enzymatic testing
- Alanine aminotransferase at or below 5 times normal during the three months prior to dosing
- Willing and able to comply with standard dietary management of GSD III
Inclusion Criteria for Participants Rescreening Into OL-RD Cohorts After Treatment with UX053 in SAD Cohort:
- If a significant rise in ALT occurs after the prior dose, ALT should show a decreasing trend toward the subject's baseline value
- Total bilirubin, platelets and international normalized ratio (INR) is within normal limits
Key Exclusion Criteria:
- History of liver transplant or currently awaiting liver transplant
- History of cirrhosis
- Active Hepatitis B or C
- Severe kidney impairment
- History of liver cancer or large liver tumors
- History of any cancer within the past 3 years
- Known history of HIV infection
- Known severe allergy to polyethylene glycol (PEG), polysorbate, or mRNA vaccine
- Heart failure that causes marked limitation in physical activity
- Poorly controlled diabetes
- Poorly controlled hypothyroidism
- Treatment with immunosuppressive medications such as those used to treat chronic autoimmune conditions and solid organ transplants
- Pregnant or nursing, or planning to become pregnant during the study
Exclusion Criteria for Participants Rescreening Into OL-RD Cohorts After Treatment with UX053 in SAD Cohort:
- New or worsening symptoms of liver disease (including new or worsening hepatomegaly) along with any increase in transaminase levels
- Receipt of any blood product administration (eg, packed red blood cells, platelet, FFP) for management of consumptive coagulopathy
- An ALT level that is ≥ 8x ULN and > 2x the participants baseline value in the absence of an alternative explanation
Note: Additional inclusion/exclusion criteria may apply, per protocol
Sites / Locations
- University of California, Irvine
- Rare Disease Research
- Children's Hospital of Philadelphia
- University of Texas, Health Science Center of Houston
- The Ottawa Hospital Research Institute
- Hopital Femme Mere Enfant
- Institut de Myologie - Hopital Antoine Béclère
- Fondazione IRCCS Ca' Granda - Ospedale Maggiore Policlinico
- Hospital Universitario 12 de Octubre
- Salford Royal NHS Foundation Trust
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Arm 5
Arm 6
Experimental
Experimental
Experimental
Experimental
Experimental
Experimental
UX053 Dose Level 1S ->OL-1R
UX053 Dose Level 2S->OL-2R
UX053 Dose Level 3S->OL-3R
UX053 or Placebo Dose Level DB-1R
UX053 Dose Level DB-2R
UX053 Dose Level DB-3R
Participants receive a single, peripheral intravenous (IV) infusion of UX053. After completion of the 90-day Follow up Period, participants can enter the open label repeat dose (OL-RD) cohort where they will receive UX053 every 4 weeks (Q4W) for 4 doses. Participants will also receive premedication, consisting of oral paracetamol/acetaminophen or ibuprofen, an H2 blocker, and an H1 blocker.
Participants receive a single, peripheral intravenous (IV) infusion of UX053. After completion of the 90-day Follow up Period, participants can enter the open label repeat dose (OL-RD) cohort where they will receive UX053 every 4 weeks (Q4W) for 4 doses. Participants will also receive premedication, consisting of oral paracetamol/acetaminophen or ibuprofen, an H2 blocker, and an H1 blocker.
Participants receive a single, peripheral intravenous (IV) infusion of UX053. After completion of the 90-day Follow up Period, participants can enter the open label repeat dose (OL-RD) cohort where they will receive UX053 every 4 weeks (Q4W) for 4 doses. Participants will also receive premedication, consisting of oral paracetamol/acetaminophen or ibuprofen, an H2 blocker, and an H1 blocker.
Participants randomized to receive a single, peripheral IV infusion of UX053 or Placebo every 2 weeks (Q2W) for 5 doses. Participants will also receive premedication, consisting of oral paracetamol/acetaminophen or ibuprofen, an H2 blocker, and an H1 blocker.
Participants randomized to receive a single, peripheral IV infusion of UX053 or Placebo every 2 weeks (Q2W) for 5 doses. Participants will also receive premedication, consisting of oral paracetamol/acetaminophen or ibuprofen, an H2 blocker, and an H1 blocker.
Participants randomized to receive a single, peripheral IV infusion of UX053 or Placebo every 2 weeks (Q2W) for 5 doses. Participants will also receive premedication, consisting of oral paracetamol/acetaminophen or ibuprofen, an H2 blocker, and an H1 blocker.