Study of Homocysteine Metabolism in Homocystinuria

Completed

• Conditions: Homocystinuria

• Registration Number: NCT00004356
• Lead Sponsor: National Center for Research Resources (NCRR)

Brief Summary

OBJECTIVES: I. Determine basal and postmethionine plasma homocysteine in patients with premature vascular disease, cystathionine beta-synthase (CBS) or methylenetitrahydrofolate reductase (MTHFR) deficiency, and in obligate heterozygotes for CBS or MTHFR.

II. Determine whole-body homocysteine metabolic rates with isotopically-labeled methionine.

Detailed Description

PROTOCOL OUTLINE: This is a two-part study of homocysteine metabolism. Age-matched normal controls are entered in both parts of the study.

In first part of the study, participants are given oral methionine; baseline and postmethionine studies include amino acid quantitation, analysis of rapidly deproteinized plasma, and total plasma homocysteine.

In the second part of the study, participants (men and postmenopausal women only) undergo methionine tracer studies.

Study Timeline

• Study Start: 1995-02
• Study First Submitted: 1999-10-18
• Study First Submitted QC: 1999-10-18
• Study First Posted: 1999-10-19
• Study Completion: 2000-10
• Status Verified: 2001-12
• Last Update Submitted: 2005-06-23
• Last Update Posted: 2005-06-24

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 60

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified