Withdrawn study sought to map COVID-19 entry points in throat tissues

NCT ID NCT04640610

First seen Nov 20, 2025 · Last updated May 13, 2026 · Updated 21 times

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 these proteins are located in throat tissues. The study was withdrawn before enrolling any participants.

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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

Conditions

Explore the condition pages connected to this study.