Primary Hyperoxaluria Type IPhase 2PHOX-B6-PilotNCT01281878
Trial on Treatment of Patients With Primary Hyperoxaluria Type I With Pyridoxal-phosphate
A Phase 2 study testing Vitamin B 6 in people with Primary Hyperoxaluria Type I, run by University of Cologne at 1 site in Germany.
Trial summary
In this study the investigators will prospectively analyze the reduction of urinary oxalate excretion under the treatment with PLP in dosages of 5mg/kg/day up to 20 mg/kg/day and serum level response relationship with PLP as an i.v. Read more about this study
- Who is it for?
- Ages 5 to 60 years
- Conditions the study is for
- Primary Hyperoxaluria Type I
- What is being tested?
- Vitamin B 6
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 12 participants
- Where
- 1 siteGermany
- Study dates
- Dec 2010to Sep 2012
- Phase
- Phase 2
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 5 to 60 years
- All sexes
- No healthy volunteers
- Child, Adult
Who may be able to join
- Documentation of diagnosis of PH I by any one of the following:
- Liver biopsy confirmation of deficient liver specific peroxisomal alanine-glyoxylate aminotransferase, (AGT or mislocalization of AGT from peroxisomes to mitochondria)
- Homozygosity or compound heterozygosity for a known mutation in the causative gene (AGXT) for PH I
- Male or female subjects between 5 years and 60 years of age
- Renal function defined as an estimated GFR > 60 ml/min normalized to 1.73 m2 body surface area
- Subjects receiving pyridoxal-phosphate before the study must be willing to discontinue therapy with pyridoxal-phosphate for a wash out phase of at least 4 weeks but always until normalization of serum pyridoxal-phosphate levels
- Written informed consent from patients and/or legally acceptable representatives
Who cannot join
- Pregnant or lactating women
- Women of child-bearing potential who are not using a highly effective contraception method with a pearl-index < 1. Highly effective contraception methods are oral, transdermal, injectable, or implanted contraceptives, IUD, abstinence, or sterile sexual partner and must agree to continue using such precautions during the pyridoxal-phosphate study
- Subjects post liver or kidney transplantation or combined transplantation
- Chronic diarrhoea with the risk of malabsorption
- Any other abnormal finding such as physical examination or laboratory evaluation, in the opinion of the investigator, is indicative of a disease that would compromise the safety taking pyridoxal-phosphate per os and the absorption
- Subjects participating in other clinical trials with investigational products 4 weeks prior to trial entry, during the trial and 4 weeks after the trial
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- Subjects who are unable to take the trial medication
- Subjects who are unable to collect 24-hour urine samples or follow other study procedures
- Subjects who are under treatment with L-Dopa, Isoniazid, D-Penicillamine (interactions between these drugs and pyridoxal-phosphate are known and might influence serum pyridoxal-phosphate levels)
- Subjects with known allergies to substances of contents (e.g. Potassium sorbet, raspberry syrup)
- Subjects confined to an institution on judicial or official behalf
- Subjects who are in dependency to the sponsor or the PI of the trial
Trial locations and contacts
1 site in 1 country.
Germany1 site
Children´s Hospital University of Cologne
Cologne, North Rhine-Westphalia, 50931
About this study
Official title: PILOTSTUDIE ZUR PYRIDOXALPHOSPHATTHERAPIE BEI PATIENTEN MIT PRIMÄRER HYPEROXALURIE TYP I (PHOX-B6-PILOT) Pilot Trial on Treatment of Patients With Primary Hyperoxaluria Type I With Pyridoxal-phosphate
In this study the investigators will prospectively analyze the reduction of urinary oxalate excretion under the treatment with PLP in dosages of 5mg/kg/day up to 20 mg/kg/day and serum level response relationship with PLP as an i.v. solution used orally in 12 patients with primary hyperoxaluria type I as an inherited autosomal-recessive-disorder leading to increased endogenous oxalate production, urolithiasis and end stage renal disease.
- Conditions
- Primary Hyperoxaluria Type I
- Being tested
- Vitamin B 6
- Keywords
- primary hyperoxaluria, Pyridoxal-phosphate
- Medical subject headings
- Hyperoxaluria, Hyperoxaluria, Primary
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Vitamin B 6Drug
Oral solution of pyridoxal phosphate start with 5mg per kg body weight per day in two dosages over 6 weeks, increase stepwise by 5mg/kg body weight every 6 weeks up to 20 mg/kg body weight/d.
| Study group | Role | What they receive |
|---|---|---|
| Pyridoxal-phosphate | Experimental | Treatment with pyridoxal-phosphate in increasing dosages every six weeks starting with 5mg/kg body weight up to 20 mg/kg body weight. treatment duration 24 weeks Receives: Drug: Vitamin B 6 |
What is being measured
The primary outcome is the main question the study is designed to answer.
The primary endpoint of the study is the reduction of the urinary oxalate excretion (percentage change in urinary oxalate, expressed as mmol/1.73 m2 /day) at week 24 compared to baseline.
Measured: 6 month
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Jan 2011 (estimated)
- Study startDec 2010
- Primary completionSep 2012
- Study completionSep 2012
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Primary Hyperoxaluria Type IStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 12 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Cologne
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Prof. Dr. B. Hoppe, University of Cologne
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01281878
- Sponsor's protocol ID
- Uni-Koeln-1251
- Acronym
- PHOX-B6-Pilot
- Status last verified
- Oct 2012
- First submitted
- 20 Jan 2011
- Last updated
- 29 Oct 2012
- Results posted
- No
- Data monitoring committee
- No
Publications
Hoyer-Kuhn H, Kohbrok S, Volland R, Franklin J, Hero B, Beck BB, Hoppe B. Vitamin B6 in primary hyperoxaluria I: first prospective trial after 40 years of practice. Clin J Am Soc Nephrol. 2014 Mar;9(3):468-77. doi: 10.2215/CJN.06820613. Epub 2014 Jan 2.
PubMed 24385516
Study at a glance
From the registry record, last updated by the sponsor on 29 Oct 2012. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- PILOTSTUDIE ZUR PYRIDOXALPHOSPHATTHERAPIE BEI PATIENTEN MIT PRIMÄRER HYPEROXALURIE TYP I (PHOX-B6-PILOT) Pilot Trial on Treatment of Patients With Primary Hyperoxaluria Type I With Pyridoxal-phosphate
- ClinicalTrials.gov ID
- NCT01281878
- Acronym / sponsor ID
- PHOX-B6-Pilot / Uni-Koeln-1251
- Conditions
- Primary Hyperoxaluria Type I
- Keywords
- primary hyperoxaluria, Pyridoxal-phosphate
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 12 participants (actual)
- Lead sponsor
- University of CologneUniversity, hospital or other
- Study start
- Dec 2010
- Primary completion
- Sep 2012 (actual)
- Study completion
- Sep 2012 (actual)
- First posted
- 24 Jan 2011 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
In this study the investigators will prospectively analyze the reduction of urinary oxalate excretion under the treatment with PLP in dosages of 5mg/kg/day up to 20 mg/kg/day and serum level response relationship with PLP as an i.v. solution used orally in 12 patients with primary hyperoxaluria type I as an inherited autosomal-recessive-disorder leading to increased endogenous oxalate production, urolithiasis and end stage renal disease.
Study design
- Primary purpose
- Treatment
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Pyridoxal-phosphate | Experimental | Drug: Vitamin B 6Treatment with pyridoxal-phosphate in increasing dosages every six weeks starting with 5mg/kg body weight up to 20 mg/kg body weight. treatment duration 24 weeks |
Who may qualify
- Ages
- 5 to 60 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult
Key inclusion criteria (7 listed)
- Documentation of diagnosis of PH I by any one of the following:
- Male or female subjects between 5 years and 60 years of age
- Renal function defined as an estimated GFR > 60 ml/min normalized to 1.73 m2 body surface area
- Subjects receiving pyridoxal-phosphate before the study must be willing to discontinue therapy with pyridoxal-phosphate for a wash out phase of at least 4 weeks but always until normalization of serum pyridoxal-phosphate levels
- Written informed consent from patients and/or legally acceptable representatives
Key exclusion criteria (12 listed)
- Pregnant or lactating women
- Women of child-bearing potential who are not using a highly effective contraception method with a pearl-index < 1. Highly effective contraception methods are oral, transdermal, injectable, or implanted contraceptives, IUD, abstinence, or sterile sexual partner and must agree to continue using such precautions during the pyridoxal-phosphate study
- Subjects post liver or kidney transplantation or combined transplantation
- Chronic diarrhoea with the risk of malabsorption
- Any other abnormal finding such as physical examination or laboratory evaluation, in the opinion of the investigator, is indicative of a disease that would compromise the safety taking pyridoxal-phosphate per os and the absorption
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Vitamin B 6Oral solution of pyridoxal phosphate start with 5mg per kg body weight per day in two dosages over 6 weeks, increase stepwise by 5mg/kg body weight every 6 weeks up to 20 mg/kg body weight/d. | Drug | Pyridoxal-phosphate |
Primary outcome
The primary endpoint of the study is the reduction of the urinary oxalate excretion (percentage change in urinary oxalate, expressed as mmol/1.73 m2 /day) at week 24 compared to baseline.
Time frame: 6 month
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 29 Oct 2012.
- Derived from this study: PubMed 24385516Hoyer-Kuhn H, Kohbrok S, Volland R, Franklin J, Hero B, Beck BB, Hoppe B. Vitamin B6 in primary hyperoxaluria I: first prospective trial after 40 years of practice. Clin J Am Soc Nephrol. 2014 Mar;9(3):468-77. doi: 10.2215/CJN.06820613. Epub 2014 Jan 2.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing Vitamin B 6 in people with Primary Hyperoxaluria Type I, run by University of Cologne at 1 site in Germany.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 7 inclusion and 12 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 29 Oct 2012. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Germany. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
The primary endpoint of the study is the reduction of the urinary oxalate excretion (percentage change in urinary oxalate, expressed as mmol/1.73 m2 /day) at week 24 compared to baseline. (time frame: 6 month). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT01281878, which also lists 1 linked publication.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 29 Oct 2012.