Inhibition of Complement Factor 3 in Geographic Atrophy with NGM621: Phase 1 Dose-Escalation Study Results.

Abstract

PURPOSE:

To evaluate the safety and tolerability of single and multiple intravitreal injections of NGM621 in patients with geographic atrophy (GA) and to characterize the pharmacokinetics and immunogenic potential.

DESIGN:

Multicenter, open-label, single- and multiple-dose phase 1 study.

METHODS:

Fifteen patients enrolled at 4 sites in the United States. Participants had GA secondary to age-related macular degeneration, lesion size ≥2.5 mm2, best-corrected visual acuity of 4 to 54 letters (20/80 to 20/800 Snellen equivalent) in the study eye, and no history of choroidal neovascularization in either eye. Patients who met eligibility criteria were treated in a single ascending-dose phase (2 mg, 7.5 mg, and 15 mg) or received 2 doses of NGM621 (15 mg) 4 weeks apart in the multidose phase and were monitored for 12 weeks (85 days). Assessments included adverse events, best-corrected visual acuity, low-luminance visual acuity, vital signs, clinical laboratory evaluations, GA lesion area as measured by fundus autofluorescence, spectral domain optical coherence tomography, and pharmacokinetic, immunogenicity, and pharmacodynamic assessments.

RESULTS:

All 15 participants completed the 12-week study. There were no serious adverse events, no drug-related adverse events, and no choroidal neovascularization developed in either eye. Mean visual acuity and GA lesion area appeared stable through week 12 for all cohorts. Pharmacokinetic analyses indicated that NGM621 serum exposures appeared to be dose proportional, and no antidrug antibodies were identified at any of the evaluated time points.

CONCLUSIONS:

In this small, open-labeled, 12-week phase 1 study, NGM621 was safe and tolerable when administered intravitreally up to 15 mg.<END ABSTRACT>.

• Authors: Charles C Wykoff, Vrinda Hershberger, David Eichenbaum, Erin Henry, Husam S Younis, Priya Chandra, Nancy Yuan, Mark Solloway, Alex DePaoli
• Journal: American journal of ophthalmology (Am J Ophthalmol) Vol. 235 Pg. 131-142 (03 2022) ISSN: 1879-1891 [Electronic] United States
• PMID: 34509438 (Publication Type: Clinical Trial, Phase I, Journal Article, Multicenter Study, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved.

Chemical References

• Complement C3

Topics

• Choroidal Neovascularization (complications, diagnosis, drug therapy)
• Complement C3
• Fluorescein Angiography (methods)
• Geographic Atrophy (diagnosis, drug therapy)
• Humans
• Intravitreal Injections
• Macular Degeneration (diagnosis)
• Tomography, Optical Coherence
• Treatment Outcome