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Withdrawn study sought clues to COVID-19 entry in tonsils

NCT ID NCT04640610

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
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 Results may not be published yet.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 This study
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This status has not been confirmed recently, so it may be out of date.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 aimed to measure two proteins, ACE2 and TMPRSS2, in tonsils and adenoids of children and adults. These proteins help the COVID-19 virus enter cells. The goal was to understand where the virus might enter the body. However, the study was withdrawn before any participants were enrolled.

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.

Started

Jun 2021

Finished

Jun 2021

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

Children and adults, without SARS-CoV-2 infection, in whom an adenoidectomy and/or tonsillectomy is performed for their care in the centers of the study.

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: * Children and adults, without SARS-CoV-2 infection, in whom an adenoidectomy and/or tonsillectomy is performed for their care in the hospitals of Assistance Publique-Hôpitaux de Paris participating in the study. * Holders of parental authority of minor patients and adult patients not opposed to participation in the study. Exclusion Criteria: \- N/A

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As listed by the trial registrant

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

Contacts and locations

Locations

  • HEGP

    Paris, 75015, France

  • Hôpital Armand Trousseau

    Paris, 75012, France

  • Hôpital Bichat

    Paris, 75018, France

  • Hôpital Bicêtre

    Le Kremlin-Bicêtre, 94270, France

  • Hôpital Lariboisière

    Paris, 75010, France

  • Hôpital Mondor

    Créteil, 94000, France

  • Hôpital Necker-Enfants Malades

    Paris, 75015, France

  • Hôpital Pitié Salpêtrière

    Paris, 75013, France

  • Hôpital Tenon

    Paris, 75020, France

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