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48-Hour test may predict who benefits from PKU drug

NCT ID NCT07255599

Knowledge-focused Sponsor: Sohag University 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
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Updated 1 time

Summary

This study tests whether a 48-hour BH4 loading test can predict which people with phenylketonuria (PKU) will respond to treatment. Twenty participants receive BH4 and have their blood phenylalanine levels measured over two days. The goal is to link test results with each person's genetic makeup to improve personalized care.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Sapropterin Dihydrochloride (BH4, tetrahydrobiopterin)
What this could lead to
If successful, this could help doctors quickly identify which PKU patients benefit from BH4 therapy, personalizing treatment and avoiding unnecessary medication.
What could go wrong
This is a small, early-phase study with only 20 participants, so results may not apply to all PKU patients. The 48-hour test may not reliably predict long-term response.

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.

Phase

Phase 1

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

About 20 people

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

Started

Sep 2025

Expected to finish

Sep 2026

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.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

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: * Patients were supplemented with phenylalanine a protein rich supplement based on milk protein, or an increase in natural protein intake) if phenylalanine was \< 400 μmol/l Exclusion Criteria: * if phenylalanine was less than 400 μmol/l

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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)

Contacts and locations

Locations

  • Sohag Faculty of Medicine

    Sohag, Egypt

More trials for these conditions

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