DCR-PHXC: Multiple fixed doses of DCR-PHXC by subcutaneous (SC) injection
Study summary
The proposed study is designed to provide patients previously enrolled in Phase 1 and 2 studies of DCR-PHXC and their siblings (\<18 years old) long-term access to DCR-PHXC, and to evaluate the long-term safety and efficacy of DCR-PHXC in patients with PH.
Eligibility
Sex
ALL
Min age
—
Max age
—
Healthy volunteers
No
Key Inclusion Criteria:
•Participant successfully completed a Dicerna Pharmaceuticals, Inc. study of DCR PHXC.
OR Participant is the sibling of a participant who successfully completed a Dicerna Pharmaceuticals, Inc. study of DCR PHXC. Siblings must be younger than 18 years of age and must have genetically confirmed PH.
* For participants rolling over from a multidose study of DCR-PHXC, enrollment should occur within a window of 25 to 75 days from the last dose of study intervention.
* Estimated GFR at screening ≥ 30 mL/min normalized to 1.73 m2 body surface area (BSA), calculated using Chronic Kidney Disease Epidemiology Collaboration (CKD EPI) formula in participants aged ≥ 18 years, or the multivariate equation by Schwartz in participants aged 12 months to 17 years. In Japan, the cystatin C-based Uemura formula will be used for participants aged 12 months to \<2 years, the creatinine-based Uemura formula by will be used for participants aged 2 to 17 years, and the equation by Matsuo will be used in participants aged ≥ 18 years.
Key Exclusion Criteria:
* Renal or hepatic transplantation (prior or planned within the study period)
* Plasma oxalate \> 30 µmol/L
* Currently on dialysis
* Documented evidence of clinical manifestations of systemic oxalosis
Primary outcome measure(s)
The annual rate of decline in eGFR in participants with PH1 — Annual change from baseline To evaluate the effect of DCR PHXC on estimated glomerular filtration rate (eGFR) in participants with PH1
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
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