Status:

RECRUITING

A Study to Test the Safety of Pozelimab in Pediatric Participants 1 to 5 Years of Age With a Rare Disease Called CHAPLE (Complement Hyperactivation, Angiopathic Thrombosis, Protein-losing Enteropathy) Disease

Lead Sponsor:

Regeneron Pharmaceuticals

Conditions:

CHAPLE Disease

Eligibility:

All Genders

1-5 years

Phase:

PHASE4

Brief Summary

This study is researching a drug called pozelimab (called "study drug"). The main aim of this study is to monitor the safety and tolerability of the study drug. The study is focused on young children...

Eligibility Criteria

Inclusion

  • Key
  • Clinical diagnosis of CD55-deficient CHAPLE disease as described in the protocol
  • Parent(s)/legal guardian(s) are willing and able to comply with participant's clinic visits and study-related procedures, including participant's completion of the full series of meningococcal vaccinations required per protocol.
  • Parent(s)/legal guardian(s) are willing to provide written informed consent
  • Participant has active CHAPLE disease as described in the protocol
  • Key

Exclusion

  • History of meningococcal infection
  • No documented meningococcal quadrivalent (serotype ACWY) vaccination prior to screening and participant's parent(s)/legal guardian(s) are unwilling for participant to undergo vaccination during the study as described in the protocol
  • No documented vaccination for Haemophilus influenzae and Streptococcus pneumoniae if applicable based on local practice or guidelines prior to screening as described in the protocol
  • Prior treatment with a complement inhibitor as described in the protocol
  • Presence of a concomitant disease that leads to hypoproteinemia or secondary intestinal lymphangiectasia as described in the protocol
  • Note: Other Protocol Defined Inclusion/ Exclusion Criteria Apply

Key Trial Info

Start Date :

December 23 2025

Trial Type :

INTERVENTIONAL

Allocation :

ESTIMATED

End Date :

August 24 2029

Estimated Enrollment :

5 Patients enrolled

Trial Details

Trial ID

NCT07142343

Start Date

December 23 2025

End Date

August 24 2029

Last Update

November 12 2025

Active Locations (1)

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Page 1 of 1 (1 locations)

1

Marmara University Hospital

Istanbul, Turkey (Türkiye), 10 34899