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Gene hunt: scientists seek clues to blood transfusion reactions in sickle cell

NCT ID NCT06944067

Knowledge-focused Sponsor: National Human Genome Research Institute (NHGRI) Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Sep 11, 2026 · Updated 3 times

Summary

This study aims to find genetic differences that explain why some people with sickle cell disease develop immune reactions to blood transfusions. Researchers will compare the genes of 50 participants who have had reactions with those who have not. The goal is to identify specific gene changes that cause these reactions, which could lead to better treatments in the future.

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 50 people

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

Started

Jun 2025

Expected to finish

Apr 2030

An estimate. End dates often move.

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

Individuals with sickle cell disease who may or may not have had a history of alloimmune response to blood transfusions. The study population will include children ages 2-17 years old and adults. The study population will not include pregnant women, people taking immunosuppressive medications, or people with a history of transplant (e.g., bone marrow or stem cell transplant).

Ages

2 to 99 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 To be eligible to participate in this study, an individual must meet all of the following criteria: 1\. Individual (\> 2 years of age) with confirmed SCD diagnosis who meets at least one of the following conditions: 1. History of greater than ten administered transfusions or 20 transfusion units (where known) 2. History of one or more antibody screens 3. Known candidate variant genotype EXCLUSION CRITERIA An individual who meets any the following criteria will be excluded from participation in this study: 1. Impaired decision-making capability, with or without a legally authorized representative 2. History of transplant (e.g., organ, bone marrow, stem cell) 3. Taking immunosuppressive medications at time of enrollment 4. Confirmed pregnancy

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Conditions

The condition(s) this trial relates to.

sickle cell disease

As listed by the trial registrant

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

Sickle cell disease

How to take part

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

  1. The study's own enquiry address

    This study publishes an address for enquiries. See it below .

  2. The places running it

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

  3. 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 ↗

  4. 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

Study contacts

  • Contact

    Email: •••••@•••••

Locations

  • National Institutes of Health Clinical Center

    RECRUITING

    Bethesda, Maryland, 20892, United States

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