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CompletedNCT00004333Updated Jun 24, 2005

Phase II Study of the Enzyme Inhibitor NTBC for Tyrosinemia Type I

A Phase 2 interventional study of NTBC in Tyrosinemia, Type I, sponsored by National Center for Research Resources (NCRR). Completed. Open to participants aged 0 Years and older. Per ClinicalTrials.gov, last updated 2005-06-24.

Sponsored by National Center for Research Resources (NCRR) · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Ages
0 Years and older
Sex
All
01

Study 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 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.

02

Conditions studied

  • Tyrosinemia, Type I

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Keywords

  • inborn errors of metabolism
  • rare disease
  • tyrosinemia I
03

In context

Tyrosinemias

21 studies on the registry are indexed under Tyrosinemias; 3 are open to participants now.

Browse Tyrosinemias studies →

Lead sponsor

National Center for Research Resources (NCRR) is the lead sponsor of 265 studies on the registry; none are open to participants now.

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

04

Who can participate

Ages eligible
0 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

PROTOCOL ENTRY CRITERIA:

Tyrosinemia type I No cirrhosis No hepatocellular carcinoma

05

Study design

Phase
Phase 2
Primary purpose
Treatment

Interventions

  • DrugNTBC
06

Study locations

No study locations are listed for this record.

07

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 24, 2005, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
08

Registry details

Key details

Study ID
NCT00004333
Lead sponsor
National Center for Research Resources (NCRR)
Collaborators
University of Michigan
First posted
Oct 19, 1999
Start date
Nov 1994
Last update
Jun 24, 2005

Study contacts

Jess G. Thoene
study chair · University of Michigan
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jul 2000. You cannot join it, but the record below documents what was studied.

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