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Scientists hunt for hidden DNA clues behind missing limbs

NCT ID NCT05555225

Knowledge-focused Sponsor: University Hospital, Lille 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
Running, but no longer taking on new participants.
Completed This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 investigates whether changes in DNA methylation—a kind of chemical switch—might cause certain rare limb malformations that appear without a family history. Researchers will compare DNA samples from 40 people with Amelia (missing two or four limbs) or Femur Fibula Ulna Syndrome against matched controls. The goal is to identify regions where methylation differs, which could point to new causes for these conditions. No treatment or intervention is involved.

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

40 people

The number who actually took part.

Started

Mar 2023

Finished

Jul 2023

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

DNA samples were obtained from the molecular biology laboratory of Lille university hospital. All patients exhibiting amelia or Femur-Fibula-Ulna Syndrome and with enough DNA available in the lab could be included.

Ages

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

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: * Specific consent for this study * DNA available in the laboratory * For amelia : agenesia of 2 or 4 limbs * For Femur-Fibula-Ulna Syndrome : hypoplasia or agenesia of the femur uni or bilateral with hypoplasia or agenesia or bowing of the fibula and/or of the ulna Exclusion Criteria: * No consent * No available DNA or poor quality of the DNA sample * Patient under tutorship * Pregnancy or nursing mother * Patient non covered by the French social security

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Conditions

The condition(s) this trial relates to.

Ectromelia femur-fibula-ulna complex non-syndromic amelia

As listed by the trial registrant

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

AMELIA Femur fibula ulna syndrome

Contacts and locations

Locations

  • chu de Lille

    Lille, France