Withdrawn study sought clues to COVID-19 entry in tonsils

NCT ID NCT04640610

Terminated Knowledge-focused Sponsor: Assistance Publique - Hôpitaux de Paris Source: ClinicalTrials.gov ↗

First seen Nov 20, 2025 · Last updated May 24, 2026 · Updated 23 times

Summary

This study was designed 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 first infect people. However, the study was withdrawn before enrolling any participants.

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Contacts and locations

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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

Conditions

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ADENOIDECTOMY TONSILLECTOMY