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Phase I/II Study of Heme Arginate and Tin Mesoporphyrin for Acute Porphyria

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ClinicalTrials.gov Identifier: NCT00004789
Recruitment Status : Completed
First Posted : February 25, 2000
Last Update Posted : June 24, 2005
Sponsor:
Collaborator:
University of Texas
Information provided by:
Office of Rare Diseases (ORD)

Tracking Information
First Submitted Date  ICMJE February 24, 2000
First Posted Date  ICMJE February 25, 2000
Last Update Posted Date June 24, 2005
Study Start Date  ICMJE July 1993
Primary Completion Date Not Provided
Current Primary Outcome Measures  ICMJE Not Provided
Original Primary Outcome Measures  ICMJE Not Provided
Change History No Changes Posted
Current Secondary Outcome Measures  ICMJE Not Provided
Original Secondary Outcome Measures  ICMJE Not Provided
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
 
Descriptive Information
Brief Title  ICMJE Phase I/II Study of Heme Arginate and Tin Mesoporphyrin for Acute Porphyria
Official Title  ICMJE Not Provided
Brief Summary

OBJECTIVES: I. Evaluate the efficacy and safety of heme arginate in the treatment of 20 patients with acute attacks of porphyria.

II. Evaluate the efficacy and safety of heme arginate in preventing frequent exacerbations of acute porphyria in up to 15 patients.

III. Estimate the lowest effective dose of heme arginate (0.3, 1.0, or 3.0 mg/kg) in reducing porphyrin precursors in 12 stable patients with acute intermittent porphyria in remission.

IV. Evaluate the safety and efficacy of tin mesoporphyrin used in combination with heme arginate in reducing porphyrin precursors in 12 stable patients with acute intermittent porphyria in remission.

Detailed Description

PROTOCOL OUTLINE: This project involves 4 studies: an unblinded multicenter treatment study, an unblinded prevention study, a controlled dose-ranging study, and a controlled drug combination dose-ranging study.

In the treatment study, participants with acute attacks of porphyria receive intravenous heme arginate daily for 4 days. Treatment may be extended to 7 days in patients with severe attacks and slow recovery; these data are analyzed separately.

In the prevention study, participants receive weekly infusions of heme arginate for 6 months. Treatment may be extended in selected cases; these data are analyzed separately. If an acute attack occurs, patients are treated with a standard course of heme arginate. Participants are followed weekly for 6 months after preventive treatment.

In the dose-ranging study, 4 groups of 3 patients are randomly assigned to standard and low-dose heme arginate infusions, administered daily for 4 days. After a washout of 4-12 weeks, patients are crossed to a second dose. In 2 of the 4 groups, patients cross between heme arginate and a normal saline control.

In the combination dose-ranging study, 4 groups of 3 patients are randomly assigned to 1 of 2 doses of tin mesoporphyrin. After a 4-12 week washout, these patients are crossed to a standard or low-dose heme arginate infusion. After a second 4-12 week washout, patients are given a combination infusion of tin mesoporphyrin followed by heme arginate.

All participants are given a special diet to prevent fluctuations in porphyrin precursors.

Study Type  ICMJE Interventional
Study Phase  ICMJE Phase 1
Phase 2
Study Design  ICMJE Primary Purpose: Treatment
Condition  ICMJE Porphyria
Intervention  ICMJE
  • Drug: heme arginate
  • Drug: tin mesoporphyrin
Study Arms  ICMJE Not Provided
Publications * Not Provided

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Recruitment Information
Recruitment Status  ICMJE Completed
Enrollment  ICMJE
 (submitted: June¬†23,¬†2005)
59
Original Enrollment  ICMJE Same as current
Study Completion Date  ICMJE Not Provided
Primary Completion Date Not Provided
Eligibility Criteria  ICMJE

PROTOCOL ENTRY CRITERIA:

--Disease Characteristics--

  • Well-documented acute porphyria, i.e.: Acute intermittent porphyria Variegate porphyria Hereditary coproporphyria

--Patient Characteristics--

  • No pregnant women
Sex/Gender  ICMJE
Sexes Eligible for Study: All
Ages  ICMJE 18 Years and older   (Adult, Older Adult)
Accepts Healthy Volunteers  ICMJE No
Contacts  ICMJE Contact information is only displayed when the study is recruiting subjects
Listed Location Countries  ICMJE Not Provided
Removed Location Countries  
 
Administrative Information
NCT Number  ICMJE NCT00004789
Other Study ID Numbers  ICMJE 199/11887
UTMB-398
Has Data Monitoring Committee Not Provided
U.S. FDA-regulated Product Not Provided
IPD Sharing Statement  ICMJE Not Provided
Responsible Party Not Provided
Study Sponsor  ICMJE National Center for Research Resources (NCRR)
Collaborators  ICMJE University of Texas
Investigators  ICMJE
Study Chair: Karl Elmo Anderson University of Texas
PRS Account Office of Rare Diseases (ORD)
Verification Date December 2001

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP