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Could low serotonin in blood platelets be a hidden cause of bleeding?

NCT ID NCT07302087

Knowledge-focused Sponsor: University Hospital, Strasbourg, France 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at 50 adults with unexplained bleeding to see if low serotonin levels in their platelets are linked to their symptoms. Researchers will use a standard bleeding questionnaire to measure bleeding severity. The goal is to better understand how serotonin deficiencies affect platelet function and contribute to bleeding disorders.

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

Nov 2024

Expected to finish

Feb 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.

Who is studied

Adult patient (≥ 18 years old) treated at Strasbourg University Hospital for a hemorrhagic syndrome, suggesting a primary hemostasis abnormality and normal von Willebrand factor, during the period from January 1, 2023, to April 1, 2024.

Ages

18 years and older

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: * Adult patient (≥ 18 years old) * Treated at Strasbourg University Hospital for a hemorrhagic syndrome, suggesting a primary hemostasis abnormality and normal von Willebrand factor, during the period from January 1, 2023, to April 1, 2024. Exclusion Criteria: \- Refusal to participate in the study

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Conditions

The condition(s) this trial relates to.

hemorrhagic disease

As listed by the trial registrant

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

Hemorrhagic syndrome

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

  • Centre de Ressources et de Compétences des Maladies Hémorragiques Constitutionnelles - CHU de Strasbourg - France

    RECRUITING

    Strasbourg, 67091, France