Study of Homocysteine Metabolism in Homocystinuria

June 23, 2005 updated by: National Center for Research Resources (NCRR)

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.

Study Overview

Status

Completed

Conditions

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 Type

Observational

Enrollment

60

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

1 second and older (Child, Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

PROTOCOL ENTRY CRITERIA:

--Disease Characteristics--

Known or suspected homocystinuria Cystathionine beta-synthase-deficient homocystinuria Obligate heterozygotes for cystathionine beta-synthase deficiency Premature vascular disease

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

National Center for Research Resources (NCRR)

Collaborators

University of California, San Diego

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

February 1, 1995

Study Completion

October 1, 2000

Study Registration Dates

First Submitted

October 18, 1999

First Submitted That Met QC Criteria

October 18, 1999

First Posted (Estimate)

October 19, 1999

Study Record Updates

Last Update Posted (Estimate)

June 24, 2005

Last Update Submitted That Met QC Criteria

June 23, 2005

Last Verified

December 1, 2001

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 199/11920
  • UCSD-1033

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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