Long-term safety and efficacy of AVTX-803 for Leukocyte Adhesion Deficiency Type II

A Phase 3, Open-Label, Extension Study to Assess the Long-term Safety and Efficacy of AVTX-803 in Subjects With Leukocyte Adhesion Deficiency Type II (LAD II)

Phase 3 Interventional AUG Therapeutics · NCT05754450

This study is testing a new drug called AVTX-803 to see if it is safe and effective for people with Leukocyte Adhesion Deficiency Type II over a long period of time.

Quick facts

PhasePhase 3
Study typeInterventional
Enrollment2 (estimated)
Ages6 Months to 75 Years
SexAll
SponsorAUG Therapeutics Industry-sponsored
Locations1 site (Rochester, Minnesota)
Trial IDNCT05754450 on ClinicalTrials.gov

What this trial studies

This extension study aims to evaluate the long-term safety and effectiveness of the investigational drug AVTX-803 in patients diagnosed with Leukocyte Adhesion Deficiency Type II (LAD II). Participants must have previously completed a related protocol and have confirmed biochemical and genetic evidence of the condition. The study will monitor participants for any adverse effects and assess the drug's efficacy over an extended period.

Who should consider this trial

Good fit: Ideal candidates are individuals who have completed the AVTX-803-LAD-301 protocol and have a confirmed diagnosis of LAD II.

Not a fit: Patients with severe anemia, impaired renal function, or known intolerance to fucose may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could provide a new treatment option that improves the health and quality of life for patients with LAD II.

How similar studies have performed: While this study builds on previous research, the specific approach with AVTX-803 in this context is novel and has not been extensively tested in similar studies.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Subject must have completed protocol AVTX-803-LAD-301
* Subject has biochemically and genetically proven LAD II (SLC35C1-CDG)

Exclusion Criteria:

* Subject has severe anemia defined as hemoglobin \<8.0 g/dL (\<4.9 mmol/L)
* Subject has impaired renal function as defined by an eGFR \<90 mL/min
* Subject has known or suspected intolerance or hypersensitivity to fucose or any ingredients of the investigational product
* In the investigator's opinion, subject has a history of failure to respond to fucose at adequate dosing

Where this trial is running

Rochester, Minnesota

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Leukocyte Adhesion Deficiency
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.