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An Open-Label, Single-arm Study to Evaluate the Pharmacokinetics (PK), Pharmacodynamics (PD), Safety, and Efficacy of Gefurulimab in Pediatric Patients (6 to < 18 years of age) with Generalized Myasthenia Gravis (gMG) Who Express Acetylcholine Receptor Antibodies (AChR+)

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2024-515157-17-00
Acronym
ALXN1720-MG-302
Enrollment
4
Registered
2025-03-24
Start date
2025-12-22
Completion date
Unknown
Last updated
2025-03-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Generalized Myasthenia Gravis with autoantibodies against acetylcholine receptor (AChR)

Brief summary

Primary PK Estimand: Variables: Serum gefurulimab concentrations from Day 1 predose through Week 18 predose (Cmax, Ctrough) Summary measures: Summary statistics of gefurulimab concentrations at Day 1 predose through Week 18 predose Primary PD Estimand: Variables: Serum free C5 concentrations from Day 1 predose through Week 18 predose Summary measures: Summary statistics of serum free C5 concentrations at Day 1 predose through Week 18 predose

Detailed description

"• Incidence of TEAEs and TESAEs • Change from Baseline in vital signs, ECG, physical examination, and laboratory assessments • Tolerability of the subcutaneous injection", "• Change from Baseline in QMG total score from Baseline through Week 18 • Proportion of participants with ≥ 5-point reduction compared to Baseline in the QMG total score over time through Week 18 • Change in MG-ADL total score from Baseline through Week 18 • Proportion of participants with ≥ 3-point reduction compared to Baseline in the MG-ADL total score over time through Week 18"

Interventions

Sponsors

Alexion Pharmaceuticals Inc.
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
0 Years to 17 Years

Design outcomes

Primary

MeasureTime frame
Primary PK Estimand: Variables: Serum gefurulimab concentrations from Day 1 predose through Week 18 predose (Cmax, Ctrough) Summary measures: Summary statistics of gefurulimab concentrations at Day 1 predose through Week 18 predose Primary PD Estimand: Variables: Serum free C5 concentrations from Day 1 predose through Week 18 predose Summary measures: Summary statistics of serum free C5 concentrations at Day 1 predose through Week 18 predose

Secondary

MeasureTime frame
"• Incidence of TEAEs and TESAEs • Change from Baseline in vital signs, ECG, physical examination, and laboratory assessments • Tolerability of the subcutaneous injection", "• Change from Baseline in QMG total score from Baseline through Week 18 • Proportion of participants with ≥ 5-point reduction compared to Baseline in the QMG total score over time through Week 18 • Change in MG-ADL total score from Baseline through Week 18 • Proportion of participants with ≥ 3-point reduction compared to Baseline in the MG-ADL total score over time through Week 18"

Countries

Poland

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 4, 2026