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Study of the Interaction Between the Cells Lining Blood Vessels and Angiotensin-Converting Enzyme
NCT00001461 · View on ClinicalTrials.gov ↗
Study Summary
The walls of blood vessels are lined by flat cells that are responsible for releasing substance(s) that control the activity of the blood vessel. These cells are referred to as the endothelium of the blood vessel. One of the substances released from the endothelium is called nitric oxide (NO). This substance functions to keep blood vessels relaxed and to prevent blood from clotting inside the vessels. Studies done by researchers in the Cardiology Branch of the National Heart, Lung and Blood Institute have shown that nitric oxide activity may be lower in patients with hardening of the arteries (atherosclerosis) and risk factors for atherosclerosis. Another substance released by the cells of the endothelium is called bradykinin. It functions to stimulate the production of nitric oxide. Therefore bradykinin is also responsible for the relaxation and widening of blood vessels. An enzyme found in the blood called angiotensin-converting enzyme (ACE) inactivates baradykinin and thereby decreases the production of nitric oxide. The activity of ACE is determined by genetics and is different in each person. Medications that block ACE (ACE-inhibitors) may be useful for patients with high levels of ACE activity. This study is designed to determine; 1. The role of bradkinin in stimulating the production of nitric oxide 2. Whether ACE-inhibitors improve blood vessel relaxation caused by bradykinin 3. Whether ACE-inhibitors improve abnormal blood vessel relaxation 4. Whether ACE-inhibitors and bradykinin affect blood clotting 5. Whether blood vessel response to ACE-inhibitor and bradykinin depends on the patients genetic make-up
Conditions Studied
Study Locations (1)
Maryland
- National Heart, Lung and Blood Institute (NHLBI) — Bethesda
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 209 participants |
| Start Date | 1995-03 |
| Est. Completion | 2001-04 |
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Full Details on ClinicalTrials.gov ↗What the Registry Record Tells You About NCT00001461
The ClinicalTrials.gov registry entry for NCT00001461 describes a study currently listed as completed. It is categorized as an unspecified phase, which is the standard way researchers label where a study sits along the investigational pathway from early safety work through later efficacy and post-marketing evaluation. The registered enrollment target is 209 participants, a figure that helps gauge the scale of data the investigators plan to collect. The listed sponsor is National Heart, Lung, and Blood Institute (NHLBI), which has 381 total studies on file at ClinicalTrials.gov, and sponsors are the parties responsible for study design, oversight, and regulatory filings.
The record links to 2 conditions, with Atherosclerosis appearing as the primary indexed condition, and to 0 interventions. Interventions can include drugs, devices, procedures, behavioral programs, or observational arms, and each is tracked as a separate registry field so that downstream queries can filter accurately. When a trial lists multiple interventions, it usually reflects a multi-arm design or a comparison protocol rather than a single treatment being tested in isolation. The brief summary published in the registry is the clearest source of protocol intent and should be read before drawing conclusions from any sidebar tags.
Geographic footprint matters for practical reasons: NCT00001461 reports 1 study location spanning 1 distinct geographic area — top geographies include Maryland. A larger site network tends to correlate with broader recruitment capacity, but it does not imply anything about study quality, and site-level enrollment status can diverge from the overall registry status shown above. Every data point on this page comes from the public ClinicalTrials.gov dataset and is reproduced here for reference only; it is not a medical recommendation, an endorsement of the sponsor, or an invitation to enroll. Verify current status, eligibility criteria, and contact details directly at ClinicalTrials.gov, and discuss any participation decision with your own healthcare provider.
Frequently Asked Questions
What is clinical trial NCT00001461 about?
NCT00001461 is a clinical study titled "Study of the Interaction Between the Cells Lining Blood Vessels and Angiotensin-Converting Enzyme". The walls of blood vessels are lined by flat cells that are responsible for releasing substance(s) that control the activity of the blood vessel. These cells are referred to as the endothelium of the blood vessel. One of the substances released from the endothelium is called nitric oxide (NO). This ...
What is the current status of trial NCT00001461?
This trial is currently completed. The enrollment target is 209 participants. The study started on 1995-03. Estimated completion is 2001-04.
What conditions does trial NCT00001461 study?
This clinical trial studies the following conditions: Atherosclerosis, Coronary Disease. These conditions were identified from the trial registry and reflect the primary focus areas of the research.
Who is sponsoring clinical trial NCT00001461?
This trial is sponsored by National Heart, Lung, and Blood Institute (NHLBI), which has 381 total clinical trials registered on ClinicalTrials.gov. The sponsor is responsible for the study's design, funding, and regulatory compliance.
Where is trial NCT00001461 being conducted?
This trial has 1 study location across Maryland. Contact the study sites directly through ClinicalTrials.gov for enrollment availability.
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