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Researchers launch major study to unravel cholesterol mysteries

NCT ID NCT00353782

Knowledge-focused Sponsor: National Heart, Lung, and Blood Institute (NHLBI) Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Sep 17, 2026 · Updated 15 times

Summary

This study aims to learn more about lipid disorders—conditions that affect fats like cholesterol in the blood. Researchers will observe up to 2,000 people with abnormal cholesterol levels to better understand how these disorders develop and how to diagnose them. Participants will undergo standard medical tests, but no new treatments are being tested.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 2,000 people

The number the study aims to enrol. It can still change while the study runs.

Started

Oct 2003

Lead sponsor

A government research agency

The lead sponsor is the US National Institutes of Health.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Unlimited

Ages

2 to 100 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

* INCLUSION CRITERIA: * Children \>= 2 years of age and \>12 kg and adults * Dyslipidemia subjects of interest the group The following is a representative list of the types of patient presentations with dyslipidemia and potential diagnoses eligible for this protocol: * Plasma cholesterol levels \>200 mg/dl or \<120 mg/dl includes patients with diagnoses such as familial hypercholesterolemia, familial combined hyperlipidemia, sitosterolemia, lipoprotein lipase, hepatic lipase or apo-CII deficiency, and dysbetalipoproteinemia. * Plasma LDL-C levels \>130 mg/dl or \<70 mg/dl includes patients with diagnoses such as familial hypercholesterolemia, PCSK9, apo3500, familial combined hyperlipidemia, sitosterolemia, dysbetalipoproteinemia, abetalipoproteinemia and hypobetalipoproteinemia. * Plasma HDL-C levels \>70 mg/dl or \<25 mg/dl includes patients with deficiency of cholesteryl ester transfer protein, lecithin cholesterol acyltransferase, phospholipid transfer protein, lipoprotein lipase, hepatic lipase, or apo-CII, ANGPTL3, and Tangier disease. * Plasma triglyceride levels \>150 mg/dl includes patients with deficiency of lipoprotein lipase, hepatic lipase or apoC-II, GPIHBP1, LMF1, dysbetalipoproteinemia, Type I, Type IV and Type V hyperlipidemia.

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Conditions

The condition(s) this trial relates to.

atherosclerosis Hypercholesterolemia hyperlipidemia inherited lipid metabolism disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Atherosclerosis Hypercholesterolemia

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • National Institutes of Health Clinical Center

    RECRUITING

    Bethesda, Maryland, 20892, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.