MOR103, a human monoclonal antibody to granulocyte-macrophage colony-stimulating factor, in the treatment of patients with moderate rheumatoid arthritis: results of a phase Ib/IIa randomised, double-blind, placebo-controlled, dose-escalation trial.

Abstract

OBJECTIVES:

To determine the safety, tolerability and signs of efficacy of MOR103, a human monoclonal antibody to granulocyte-macrophage colony-stimulating factor (GM-CSF), in patients with rheumatoid arthritis (RA).

METHODS:

Patients with active, moderate RA were enrolled in a randomised, multicentre, double-blind, placebo-controlled, dose-escalation trial of intravenous MOR103 (0.3, 1.0 or 1.5 mg/kg) once a week for 4 weeks, with follow-up to 16 weeks. The primary outcome was safety.

RESULTS:

Of the 96 randomised and treated subjects, 85 completed the trial (n=27, 24, 22 and 23 for pooled placebo and MOR103 0.3, 1.0 and 1.5 mg/kg, respectively). Treatment emergent adverse events (AEs) in the MOR103 groups were mild or moderate in intensity and generally reported at frequencies similar to those in the placebo group. The most common AE was nasopharyngitis. In two cases, AEs were classified as serious because of hospitalisation: paronychia in a placebo subject and pleurisy in a MOR103 0.3 mg/kg subject. Both patients recovered fully. In exploratory efficacy analyses, subjects in the MOR103 1.0 and 1.5 mg/kg groups showed significant improvements in Disease Activity Score-28 scores and joint counts and significantly higher European League Against Rheumatism response rates than subjects receiving placebo. MOR103 1.0 mg/kg was associated with the largest reductions in disease activity parameters.

CONCLUSIONS:

MOR103 was well tolerated and showed preliminary evidence of efficacy in patients with active RA. The data support further investigation of this monoclonal antibody to GM-CSF in RA patients and potentially in those with other immune-mediated inflammatory diseases.

TRIAL REGISTRATION NUMBER:

NCT01023256.

• Authors: Frank Behrens, Paul P Tak, Mikkel Østergaard, Rumen Stoilov, Piotr Wiland, Thomas W Huizinga, Vadym Y Berenfus, Stoyanka Vladeva, Juergen Rech, Andrea Rubbert-Roth, Mariusz Korkosz, Dmitriy Rekalov, Igor A Zupanets, Bo J Ejbjerg, Jens Geiseler, Julia Fresenius, Roman P Korolkiewicz, Arndt J Schottelius, Harald Burkhardt
• Journal: Annals of the rheumatic diseases (Ann Rheum Dis) Vol. 74 Issue 6 Pg. 1058-64 (Jun 2015) ISSN: 1468-2060 [Electronic] England
• PMID: 24534756 (Publication Type: Clinical Trial, Phase I, Clinical Trial, Phase II, Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
• Copyright: Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

Chemical References

• Adrenal Cortex Hormones
• Antibodies, Monoclonal
• Antibodies, Monoclonal, Humanized
• Antirheumatic Agents
• Granulocyte-Macrophage Colony-Stimulating Factor
• Otilimab
• Methotrexate

Topics

• Adrenal Cortex Hormones (therapeutic use)
• Adult
• Aged
• Antibodies, Monoclonal (administration & dosage, adverse effects)
• Antibodies, Monoclonal, Humanized
• Antirheumatic Agents (administration & dosage, adverse effects, therapeutic use)
• Arthritis, Rheumatoid (drug therapy)
• Double-Blind Method
• Drug Therapy, Combination
• Female
• Granulocyte-Macrophage Colony-Stimulating Factor (antagonists & inhibitors)
• Humans
• Male
• Methotrexate (therapeutic use)
• Middle Aged
• Nasopharyngitis (chemically induced)
• Pleurisy (chemically induced)
• Treatment Outcome