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CompletedNCT04542590PHYOX-OBXUpdated Dec 2, 2024

Natural History of Patients With PH3 and a History of Stone Events

An observational study in Primary Hyperoxaluria Type 3, sponsored by Dicerna Pharmaceuticals, Inc., a Novo Nordisk company. Completed at 6 sites in 5 countries. Open to participants aged 2 Years and older. Per ClinicalTrials.gov, last updated 2024-12-02.

Sponsored by Dicerna Pharmaceuticals, Inc., a Novo Nordisk company (part of Novo Nordisk A/S) · Observational

Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
7
Ages
2 Years and older
Sex
All
01

Study summary

This is a natural history study of adults, adolescents, and children (starting at birth) with genetically confirmed primary hyperoxaluria type 3 (PH3) who have a history of stone events during the last 3 years and/or the presence of pre existing stones detected by renal ultrasound at screening.

Read the detailed description

The relationship between the level of Uox and the incidence of kidney stones and/or nephrocalcinosis in patients with PH3 has not been established. The goal of this study is to record 24-hour Uox levels and the incidence of new stone formation and/or the degree of nephrocalcinosis in patients with PH3 over time.

Potential participants are screened over an up-to-7 week period according to the eligibility criteria and will then be followed every 6 months over an up-to-2-year period to determine the annualized new stone formation rate (number of new stones being formed per year) and the change in the degree of nephrocalcinosis (if applicable).

New stone formation is defined as occurrence of any of the following:

  • Spontaneous stone passage in the absence of pre-existing stones
  • Stone passage occurring without change in the number of pre-existing stones detected by renal ultrasound
  • Appearance of new stones on renal ultrasound or 100% or more growth of a pre-existing stone (estimated area)
  • Surgical removal of newly formed stones Note: Spontaneous passage or surgical removal of pre-existing stones does not meet the criteria for new stone formation.

This is a non-interventional study that will last up to 2 years.

02

Conditions studied

  • Primary Hyperoxaluria Type 3

Keywords

  • primary hyperoxaluria
  • PH3
  • observational
  • kidney stones
  • nephrocalcinosis
03

In context

Hyperoxaluria, Primary

42 studies on the registry are indexed under Hyperoxaluria, Primary; 11 are open to participants now.

This study's enrollment of 7 is below the median of 730 across 13 observational studies indexed under Hyperoxaluria, Primary.

Browse Hyperoxaluria, Primary studies →

Lead sponsor

Dicerna Pharmaceuticals, Inc., a Novo Nordisk company is the lead sponsor of 18 studies on the registry; 2 are open to participants now.

Of its 8 completed or terminated interventional studies of FDA-regulated products, 4 (50%) have results posted.

First submitted before Dicerna Pharmaceuticals, Inc. became part of Novo Nordisk A/S.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
2 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

This is a natural history study in adults, adolescents, and children (starting from birth) with genetically confirmed PH3 who have a history of stone events during the last 3 years and/or the presence of preexisting stones detected by renal ultrasounds at Screening, and an eGFR > 30 mL/min/1.73 m2 or serum creatinine below the 97th percentile for patients younger than 12 months old.

Eligibility criteria

Key inclusion criteria

  • Genetically confirmed PH3
  • For participants at least 2 years of age, history of stone events (defined as presence of calcifications in the urinary tract and/or kidney, their relative location, and the number and size of stones) during the last 3 years and/or presence of pre-existing stones detected by renal ultrasound at Screening
  • Uox ≥ 0.7 mmol/24 hours (adjusted per 1.73 m2 BSA in participants \< 18 years of age) OR if not able to collect 24-hour urine, average spot Uox to creatinine ratio at Screening above the 95th percentile for age:

    • > 220 mmol/mol in participants \< 6 months
    • > 170 mmol/mol in participants from 6 months to \< 12 months
    • > 130 mmol/mol in participants 12 months to \< 2 years
    • > 100 mmol/mol in participants from 2 to \< 3 years and
    • > 80 mmol/mol in participants from 3 to 5 years
  • at Screening ≥ 30 mL/min or for infants aged less than 12 months, serum creatinine below the 97th percentile of a healthy population

Key Exclusion Criteria:

  • Prior or planned liver transplant within study period
  • Currently receiving dialysis or anticipating dialysis during study period
  • Unwillingness to comply with study procedures
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

GFR and eGFR (kidney filtering)

GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².

Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.

05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
7 participants (actual)
Target follow-up
2 Years
Patient registry
Yes
06

What researchers measure

Primary outcomes

  1. Collect stone formation data in PH3 patients

    Collect data on the rate of new stone formation in PH3 patients of at least 2 years of age

    Time frame: Assess participants' stone formation rates over the course of 2 years

  2. Assess relationship between urine oxalate (Uox) levels and stone formations in PH3 patients

    Explore the potential relationship between Uox levels and new stone formation in patients (≥ 2 years of age) with genetically confirmed PH3 and relatively intact renal function

    Time frame: Measure participants' Uox levels over the course of 2 years

  3. Collect data on the degree of nephrocalcinosis in PH3 patients

    Collect data on the degree of nephrocalcinosis in PH3 patients of at least 2 years of age

    Time frame: Assess the change in nephrocalcinosis grade over the course of 2 years

07

Study locations

6 sites
  • Clinical Trial Site
    Boston, Massachusetts 02115, United States
  • Clinical Trial Site
    New York, New York 10016, United States
  • Clinical Trial Site
    Toronto, Ontario M5G 1X8, Canada
  • Clinical Trial Site
    Heidelberg, 69120, Germany
  • Clinical Trial Site
    Warsaw, 04-141, Poland
  • Clinical Trial Site
    London, WC1N 3JH, United Kingdom
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Dec 2, 2024, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT04542590
Responsible party
Sponsor
First posted
Sep 9, 2020
Start date
Sep 9, 2021
Primary completion
Jul 23, 2024
Completion
Jul 23, 2024
Last update
Dec 2, 2024

Study contacts

Verity Rawson
study director · Dicerna, A Novo Nordisk Company

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Nov 2024. You cannot join it, but the record below documents what was studied.

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