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PKU mystery: why do some patients thrive despite high phe levels?

NCT ID NCT07406009

Knowledge-focused Sponsor: Central Hospital, Nancy, France Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026

Summary

This study looks at how blood phenylalanine (Phe) levels affect thinking, emotions, and daily functioning in adults with PKU. Researchers will ask 30 adults with PKU and their relatives to complete questionnaires. The goal is to understand why some people with high Phe levels have no major problems, while others do, so that future care can be more personalized.

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 30 people

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

Expected to start

Jan 2026

An estimate. Start dates often move.

Expected to finish

Jun 2027

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

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

Who is studied

The study will be offered to all adult subjects and their close relatives who know the person well as part of the follow-up for PKU at the Centre de Référence des maladies héréditaires du métabolisme at the Nancy CHRU. This study will be offered to a second metabolic reference center.

Ages

18 to 59 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

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: Patients : * Age ≥ 18 years and \< 59 years (age limit for ASEBA questionnaire) * Person being monitored for PKU / HMP * Relative living with the person * Person who has received full information on the organization of the research and has not objected to the use of this data * Compulsory membership of a social security scheme Relatives: * Age ≥ 18 years * Person who has received full information on the organization of the research and has not objected to the use of this data * Compulsory membership of a social security scheme Exclusion Criteria: * Refusal or linguistic, physical or psychological incapacity to to participate in the study * Subjects under court protection * Subjects under guardianship or curatorship

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Conditions

The condition(s) this trial relates to.

phenylketonuria

As listed by the trial registrant

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

Phenylketonuria (PKU)

How to take part

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

  1. 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 ↗

  2. 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.

More trials for these conditions

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