Tyrosinemia, Type IPhase 2NCT00004333
Phase II Study of the Enzyme Inhibitor NTBC for Tyrosinemia Type I
A Phase 2 study testing NTBC in people with Tyrosinemia, Type I, run by National Center for Research Resources (NCRR).
Trial summary
OBJECTIVES: Assess whether 2-(2-nitro-4-trifluoromethylbenzoyl)-1,3-cyclohexanedione (NTBC) at 0.6 mg/kg per day prevents liver failure in at least 1 patient with tyrosinemia type I. Read more about this study
- Who is it for?
- Ages 0 years and older
- Conditions the study is for
- Tyrosinemia, Type I
- What is being tested?
- NTBC
- How many people
- Not given
- Where
- No sites listed yet
- Study dates
- Nov 1994to not given
- 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 0 years and older
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
PROTOCOL ENTRY CRITERIA:
Tyrosinemia type I No cirrhosis No hepatocellular carcinoma
About this study
OBJECTIVES:
Assess whether 2-(2-nitro-4-trifluoromethylbenzoyl)-1,3-cyclohexanedione (NTBC) at 0.6 mg/kg per day prevents liver failure in at least 1 patient with tyrosinemia type I.
Read the detailed description
PROTOCOL OUTLINE: Only 2 patients with tyrosinemia type I are known to this research team; others will be treated if found and if clinical conditions permit.
The enzyme inhibitor 2-(2-nitro-4-trifluoromethylbenzoyl)-1,3-cyclohexanedione (NTBC) is administered orally, in 2 divided doses daily with meals.
Patients will be followed closely for side effects attributable to NTBC.
- Conditions
- Tyrosinemia, Type I
- Being tested
- NTBC
- Keywords
- inborn errors of metabolism, rare disease, tyrosinemia I
- Medical subject headings
- Tyrosinemias, Metabolism, Inborn Errors, Rare Diseases
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
NTBCDrug
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted19 Oct 1999 (estimated)
- Study startNov 1994
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Tyrosinemia, 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
Sponsor and investigators
- Lead sponsor
- National Center for Research Resources (NCRR)
- Sponsor type
- US National Institutes of Health
- Collaborators
- University of Michigan
- Investigators
- Jess G. Thoene, Study chair, University of Michigan
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00004333
- Sponsor's protocol ID
- 199/11892
- Other IDs
- UMMC-1319
- Status last verified
- Jul 2000
- First submitted
- 18 Oct 1999
- Last updated
- 24 Jun 2005
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 24 Jun 2005. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Phase II Study of the Enzyme Inhibitor NTBC for Tyrosinemia Type I
- ClinicalTrials.gov ID
- NCT00004333
- Acronym / sponsor ID
- 199/11892
- Conditions
- Tyrosinemia, Type I
- Keywords
- inborn errors of metabolism, rare disease, tyrosinemia I
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Lead sponsor
- National Center for Research Resources (NCRR)US National Institutes of Health
- Collaborators
- University of Michigan
- Study start
- Nov 1994
- First posted
- 19 Oct 1999 (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.
OBJECTIVES:
Assess whether 2-(2-nitro-4-trifluoromethylbenzoyl)-1,3-cyclohexanedione (NTBC) at 0.6 mg/kg per day prevents liver failure in at least 1 patient with tyrosinemia type I.
Detailed description
PROTOCOL OUTLINE: Only 2 patients with tyrosinemia type I are known to this research team; others will be treated if found and if clinical conditions permit.
The enzyme inhibitor 2-(2-nitro-4-trifluoromethylbenzoyl)-1,3-cyclohexanedione (NTBC) is administered orally, in 2 divided doses daily with meals.
Patients will be followed closely for side effects attributable to NTBC.
Study design
- Primary purpose
- Treatment
Who may qualify
- Ages
- 0 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
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 |
|---|---|---|
| NTBC | Drug | – |
Primary outcome
Not reported in the source record.
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 24 Jun 2005.
Related trials for Tyrosinemia, Type I
Active, not recruitingObservational study
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Recruiting
GMP Powdered Substitutes in PKU and TYR
Phenylketonuria, Tyrosinemia
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.
Jess G. Thoene study chair
University of Michigan
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing NTBC in people with Tyrosinemia, Type I, run by National Center for Research Resources (NCRR).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
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 24 Jun 2005. Status can change between updates, so confirm with the study contact before making plans.
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.
Where can I read the original study information?
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 24 Jun 2005.